SHPH / Shuttle Pharmaceuticals Holdings, Inc. - Zgłoszenia SEC, Raport roczny, o pełnomocnictwie

Shuttle Pharmaceuticals Holdings, Inc.

Podstawowe statystyki
CIK 1757499
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Shuttle Pharmaceuticals Holdings, Inc.
SEC Filings (Chronological Order)
Na tej stronie znajduje się pełna, chronologiczna lista zgłoszeń SEC, z wyłączeniem zgłoszeń własności, które udostępniamy gdzie indziej.
May 27, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2026 SHUTTLE PHARMACEUTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2026 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation)

May 15, 2026 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2026 OR ☐ Transition Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-41488 SHUTTLE PH

May 12, 2026 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

May 7, 2026 EX-3.1

EX-3.1

Exhibit 3.1

May 7, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2026 SHUTTLE PHARMACEUTICA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2026 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation)

May 7, 2026 EX-3.2

EX-3.2

Exhibit 3.2

May 1, 2026 EX-10.3

SECOND AMENDMENT TO ASSET PURCHASE AGREEMENT

Exhibit 10.3 EXECUTION COPY SECOND AMENDMENT TO ASSET PURCHASE AGREEMENT This Second Amendment to Asset Purchase Agreement (this “Amendment”) is made and entered into as of May 4, 2026 (the “Effective Date”), by and among Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (“Parent”), 1563868 B.C. Ltd., a Canadian limited corporation (“Purchaser”), 1542770 BC Ltd., a Canadian limited co

May 1, 2026 EX-10.2

PLACEMENT AGENCY AGREEMENT

Exhibit 10.2 PLACEMENT AGENCY AGREEMENT April 30, 2026 PERSONAL AND CONFIDENTIAL Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 Attention: Christopher Cooper, Interim Chief Executive Officer Dear Mr. Cooper: This agreement (the “Agreement”) constitutes the agreement between E.F. Hutton & Co. (the “Placement Agent”) on one hand, and Shuttle Pharmaceu

May 1, 2026 EX-99.2

EX-99.2

Exhibit 99.2

May 1, 2026 EX-99.1

Shuttle Merges with United Dogecoin to Become the World’s Largest Public Dogecoin Miner The combination and related financing is expected to result in the largest publicly listed Dogecoin mining company based on percentage of the global hashrate

Exhibit 99.1 Shuttle Merges with United Dogecoin to Become the World’s Largest Public Dogecoin Miner The combination and related financing is expected to result in the largest publicly listed Dogecoin mining company based on percentage of the global hashrate Gaithersburg, Maryland, April 30, 2026 – Shuttle Pharmaceutical Holdings, Inc. (NASDAQ: SHPH) (“Shuttle”) has entered into a definitive merge

May 1, 2026 EX-2.1

AGREEMENT AND PLAN OF MERGER dated as of April 30, 2026 by and among SHUTTLE PHARMACEUTICALS HOLDINGS, INC., as the Acquiror SHUTTLE MERGER SUB, INC., as the Merger Sub UNITED DOGECOIN INC., as the Company TABLE OF CONTENTS

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER dated as of April 30, 2026 by and among SHUTTLE PHARMACEUTICALS HOLDINGS, INC., as the Acquiror SHUTTLE MERGER SUB, INC., as the Merger Sub and UNITED DOGECOIN INC., as the Company TABLE OF CONTENTS Article I. CERTAIN DEFINITIONS 2 Section 1.01 Definitions. : 2 Section 1.02 Construction. 10 Article II. THE MERGER; CLOSING 11 Section 2.01 The Merger. 11 Sect

May 1, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 30, 2026 SHUTTLE PHARMACEUT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 30, 2026 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

May 1, 2026 EX-10.1

SECURITIES PURCHASE AGREEMENT

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of April 30, 2026, between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser,” and collectively, the “Purchasers”). WHEREAS, subject to the ter

April 20, 2026 ARS

ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-41488 Shuttle Pharma

April 20, 2026 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☒ Def

April 10, 2026 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☐ Def

March 31, 2026 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-41488 Shuttle Pharma

March 31, 2026 EX-21

List of Subsidiaries

Exhibit 21 List of Subsidiaries Shuttle Pharmaceuticals, Inc., a Maryland corporation Shuttle Diagnostics, Inc., a Maryland corporation 1563868 B.C. Ltd, a Canadian corporation

March 10, 2026 EX-10.2

PLACEMENT AGENCY AGREEMENT

Exhibit 10.2 PLACEMENT AGENCY AGREEMENT March 5, 2026 PERSONAL AND CONFIDENTIAL Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 Attention: Christopher Cooper, Interim Chief Executive Officer Dear Mr. Cooper: This agreement (the “Agreement”) constitutes the agreement between E.F. Hutton & Co. (the “Placement Agent”) on one hand, and Shuttle Pharmaceut

March 10, 2026 EX-4.1

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. PRE-FUNDED WARRANT

Exhibit 4.1 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. PRE-FUNDED WARRANT Warrant Shares: [ ] Initial Exercise Date: [], 2026 Issue Date: [], 2026 THIS PRE-FUNDED WARRANT (the “Warrant”) certifies that, for value received, [] or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the date he

March 10, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 5, 2026 SHUTTLE PHARMACEUTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 5, 2026 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation

March 10, 2026 EX-10.1

SECURITIES PURCHASE AGREEMENT

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of March 5, 2026, between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser,” and collectively, the “Purchasers”). WHEREAS, subject to the term

March 10, 2026 EX-99.1

Shuttle Pharmaceuticals Announces $3.5 Million Public Offering

Exhibit 99.1 Shuttle Pharmaceuticals Announces $3.5 Million Public Offering GAITHERSBURG, Md., March 6, 2026 – Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), the owner of Molecule.ai, an artificial intelligence (“AI”) driven platform for molecular discovery and early-stage drug development, today announced that it has entered into a securities purchase a

March 9, 2026 424B3

HOLDINGS, INC. 2,238,800 Shares of Common Stock Pre-Funded Warrants to purchase up to 4,761,200 Shares of Common Stock

Filed pursuant to Section 424(b)(3) Registration No. 333-293363 PROSPECTUS SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 2,238,800 Shares of Common Stock Pre-Funded Warrants to purchase up to 4,761,200 Shares of Common Stock We are offering (i) 2,238,800 shares of our common stock, at a public offering price of $0.50 per share of common stock, and (ii) pre-funded warrants to purchase up to 4,761,200 shar

February 17, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 11, 2026 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 11, 2026 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

February 13, 2026 CORRESP

E.F. Hutton & Co. 745 Fifth Avenue, 34th Floor & PH New York, NY 10151

E.F. Hutton & Co. 745 Fifth Avenue, 34th Floor & PH New York, NY 10151 February 13, 2026 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 File No. 333-293363 REQUEST FOR ACCELERATION OF EFFECTIVENESS Requested Date: Tuesday, February 17, 2026 Requ

February 13, 2026 CORRESP

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 February 13, 2026 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, DC 20549 RE: Shuttle Pharmaceuticals Holdings, Inc. (CIK: 0001757499) Registration Statement No. 333-293363 on Form S-1 (the “Registration Statement”) Ladies and Gentlemen: Shutt

February 11, 2026 S-1/A

As filed with the Securities and Exchange Commission on February 11, 2026

As filed with the Securities and Exchange Commission on February 11, 2026 Registration No.

February 2, 2026 EX-10.1

AMENDMENT NO. 1 TO CONSULTING AGREEMENT

Exhibit 10.1 AMENDMENT NO. 1 TO CONSULTING AGREEMENT This Amendment No. 1 (this “Amendment”), dated as of January 29, 2026, to that certain Consulting Agreement, by and between Shuttle Pharmceuticals Holdings, Inc. (the “Company”) and Number 2 Capital Corp. (the “Consultant”), dated as of March 11, 2025 (the “Consulting Agreement”), is made and entered into by and between the Company and the Consu

February 2, 2026 424B3

Shuttle Pharmaceuticals Holdings, Inc. 625,156 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-291628 PROSPECTUS Shuttle Pharmaceuticals Holdings, Inc. 625,156 Shares of Common Stock Pursuant to this prospectus, the selling stockholder identified herein is offering on a resale basis 625,156 shares of common stock of Shuttle Pharmaceuticals Holdings, Inc., consisting of 625,156 shares of common stock issuable upon exercise of a pre-funded

February 2, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 29, 2026 SHUTTLE PHARMACE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 29, 2026 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

January 29, 2026 CORRESP

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 January 29, 2026 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, DC 20549 RE: Shuttle Pharmaceuticals Holdings, Inc. (CIK: 0001757499) Registration Statement No. 333-291628 on Form S-1 (the “Registration Statement”) Ladies and Gentlemen: Shuttl

January 20, 2026 CORRESP

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 January 20, 2026 Via EDGAR Alan Campbell and Laura Crotty Division of Corporation Finance Office of Life Sciences 100 F Street, NE Securities and Exchange Commission Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Amendment No. 1 to Registration Statement on Form S-1 Filed December 11,

January 16, 2026 LETTER

LETTER

January 16, 2026 Christopher Cooper Interim Chief Executive Officer Shuttle Pharmaceuticals Holdings, Inc.

January 12, 2026 EX-10.1

YUYING LIANG PROFESSIONAL CORP.

Exhibit 10.1 YUYING LIANG PROFESSIONAL CORP. Vancouver, British Columbia Canada Telephone +1 778 318 7278 Private and Confidential December 1, 2025 Mr. Chris Cooper Chief Executive Officer Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 United States Dear Mr. Cooper: We appreciate the opportunity to provide accounting services to Shuttle Pharmaceutic

January 12, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 6, 2026 SHUTTLE PHARMACEU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 6, 2026 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporati

December 29, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 29, 2025 (December 23, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 29, 2025 (December 23, 2025) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other juris

December 29, 2025 EX-10.1

FIRST AMENDMENT TO ASSET PURCHASE AGREEMENT

Exhibit 10.1 EXECUTION COPY FIRST AMENDMENT TO ASSET PURCHASE AGREEMENT This Amendment to Asset Purchase Agreement (this “Amendment”) is made and entered into as of December 23, 2025 (the “Effective Date”), by and among Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (“Parent”), 1563868 B.C. Ltd., a Canadian limited corporation (“Purchaser”), 1542770 BC Ltd., a Canadian limited corp

December 29, 2025 CORRESP

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 December 29, 2025 Via EDGAR Alan Campbell and Laura Crotty Division of Corporation Finance Office of Life Sciences 100 F Street, NE Securities and Exchange Commission Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Amendment No. 1 to Registration Statement on Form S-1 Filed December 11

December 15, 2025 LETTER

LETTER

December 15, 2025 Christopher Cooper Interim Chief Executive Officer Shuttle Pharmaceuticals Holdings, Inc.

December 11, 2025 S-1/A

As filed with the Securities and Exchange Commission on December 11, 2025

As filed with the Securities and Exchange Commission on December 11, 2025 Registration No.

December 3, 2025 DRS

Confidential Treatment Requested by Shuttle Pharmaceuticals Holdings, Inc. Pursuant to 17 C.F.R. Section 200.83 As confidentially submitted to the U.S. Securities and Exchange Commission on December 2, 2025 This draft registration statement has not b

Confidential Treatment Requested by Shuttle Pharmaceuticals Holdings, Inc. Pursuant to 17 C.F.R. Section 200.83 As confidentially submitted to the U.S. Securities and Exchange Commission on December 2, 2025 This draft registration statement has not been publicly filed with the U.S. Securities and Exchange Commission and all information herein remains strictly confidential. Registration No. 333- UN

November 28, 2025 EX-10.1

SEPARATION AGREEMENT AND MUTUAL RELEASE

Exhibit 10.1 SEPARATION AGREEMENT AND MUTUAL RELEASE This SEPARATION AGREEMENT AND MUTUAL RELEASE (“Agreement”) is made and entered into by and between Timothy Lorber, an individual and having a primary address at 1000 Jamieson Road, Lutherville, Maryland 21093 (“Executive”), and Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation with its principal place of business at 401 Professional

November 28, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 21, 2025 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 21, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

November 26, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 26, 2025 (November 20, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 26, 2025 (November 20, 2025) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other juris

November 26, 2025 EX-10.1

ASSET PURCHASE AGREEMENT SHUTTLE PHARMACEUTICALS HOLDINGS, INC., a Delaware corporation, 1563868 B.C. LTD., a Canadian limited corporation, 1542770 BC LTD., a Canadian limited corporation, Zhitian (Andy) Zhang, as Seller Guarantor Dated as of Novembe

Exhibit 10.1 ASSET PURCHASE AGREEMENT between SHUTTLE PHARMACEUTICALS HOLDINGS, INC., a Delaware corporation, 1563868 B.C. LTD., a Canadian limited corporation, and 1542770 BC LTD., a Canadian limited corporation, and Zhitian (Andy) Zhang, as Seller Guarantor Dated as of November 20, 2025 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS AND RULES OF CONSTRUCTION 1 1.1 Definitions 1 1.2 Rules of Constr

November 21, 2025 EX-10.1

RELEASE AND SETTLEMENT AGREEMENT

Exhibit 10.1 RELEASE AND SETTLEMENT AGREEMENT (Partial Payment Accepted as Payment in Full) This Release and Settlement Agreement (“Agreement”) is made and entered into on the day of November 20, 2025, by and between: Creditor: Theradex Systems, Inc. Address: 4365 Rte. 1 South, Ste 101, Princeton, NJ 08540 and Debtor: Shuttle Pharmaceuticals Holding, Inc. Address: 401 Professional Dr., Ste 260 Gai

November 21, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 20, 2025 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 20, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

November 18, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-1 Shuttle Pharmaceuticals Holdings, Inc.

November 18, 2025 S-1

As filed with the Securities and Exchange Commission on November 18, 2025

As filed with the Securities and Exchange Commission on November 18, 2025 Registration No.

November 17, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2025 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

November 13, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2025 OR ☐ Transition Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-41488 SHUTTL

November 7, 2025 EX-10.2

WestPark Capital, Inc. 1800 Century Park East, Suite 220 Los Angeles, CA 90067

Exhibit 10.2 Execution Version WestPark Capital, Inc. 1800 Century Park East, Suite 220 Los Angeles, CA 90067 November 3, 2025 Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 Attention: Christopher Cooper, CEO Dear Mr. Cooper: Subject to the terms and conditions of this letter agreement (the “Agreement”), between WestPark Capital, Inc., as the exclus

November 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2025 SHUTTLE PHARMACE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

November 7, 2025 EX-10.1

SECURITIES PURCHASE AGREEMENT

Exhibit 10.1 Execution Version SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of November 3, 2025, between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser,” and collectively, the “Purchasers”). WHEREAS

November 7, 2025 EX-4.1

PRE-FUNDED COMMON STOCK PURCHASE WARRANT SHUTTLE PHARMACEUTICALS HOLDINGS, INC.

Exhibit 4.1 Execution Version NEITHER THIS SECURITY NOR THE SECURITIES FOR WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN

October 21, 2025 EX-10.1

BINDING TERM SHEET October 20, 2025

Exhibit 10.1 BINDING TERM SHEET October 20, 2025 This Binding Term Sheet (this “Term Sheet”) sets forth our current proposal with regard to a business combination (the “Transaction”) between 1542770 BC Ltd., a Canadian limited liability company (“Molecule”) and Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (“Shuttle”). Molecule and Shuttle are each sometimes referred herein to as

October 21, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 15, 2025 SHUTTLE PHARMACE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 15, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

September 22, 2025 EX-10.1

CONSULTING AGREEMENT

Exhibit 10.1 CONSULTING AGREEMENT IR Agency LLC (the “Consultant” or “IR Agency”) is pleased to provide certain consulting services to Shuttle Pharmaceuticals Holdings Inc (“you,” “Client” or “Company”) as more fully described in this agreement (the “Agreement”). This Agreement sets forth the terms and conditions pursuant to which Company engages Consultant to provide such services. 1. Consulting

September 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 15, 2025 SHUTTLE PHARMA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 15, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpor

September 18, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2025 SHUTTLE PHARMA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpor

September 17, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 11, 2025 SHUTTLE PHARMA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 11, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpor

September 8, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 8, 2025 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 8, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

September 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 31, 2025 SHUTTLE PHARMACEU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 31, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporati

August 13, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2025 OR ☐ Transition Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-41488 SHUTTLE PHA

August 11, 2025 424B3

Shuttle Pharmaceuticals Holdings, Inc. 1,180,877 Shares of Common Stock

Filed pursuant to Rule 424(b)(3) Under the Securities Act of 1933, as amended Registration No.

August 8, 2025 LETTER

LETTER

August 8, 2025 Christopher Cooper Interim Chief Executive Officer Shuttle Pharmaceuticals Holdings, Inc.

August 8, 2025 CORRESP

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 August 8, 2025 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Trade & Services 100 F Street, N.E. Washington, D.C. 20549 Attention: Mr. Tyler Howes Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 Filed August 5, 2025 File No. 333

August 5, 2025 S-1

As filed with the Securities and Exchange Commission on August 4, 2025

As filed with the Securities and Exchange Commission on August 4, 2025 Registration No.

August 5, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-1 Shuttle Pharmaceuticals Holdings, Inc.

July 30, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2025 SHUTTLE PHARMACEUTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation

June 25, 2025 EX-99.1

Shuttle Pharmaceuticals Announces Pricing of $4.25 Million Private Placement Priced At-the-Market

Exhibit 99.1 Shuttle Pharmaceuticals Announces Pricing of $4.25 Million Private Placement Priced At-the-Market GAITHERSBURG, Md., June 20, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today ann

June 25, 2025 EX-10.3

Form of Pre-Funded Warrant

Exhibit 10.3 PRE-FUNDED COMMON STOCK PURCHASE WARRANT SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Warrant Shares: Issue Date: , 2025 Initial Exercise Date: , 2025 THIS PRE-FUNDED COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, a

June 25, 2025 EX-99.2

Shuttle Pharmaceuticals Announces Closing of $4.25 Million Private Placement Priced At-the-Market

Exhibit 99.2 Shuttle Pharmaceuticals Announces Closing of $4.25 Million Private Placement Priced At-the-Market GAITHERSBURG, Md., June 24, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today ann

June 25, 2025 EX-10.2

Registration Rights Agreement, dated June 20, 2025

Exhibit 10.2 REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT (“Agreement”) is entered into as of the 20th day of June, 2025 by and among Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and the purchasers from time to time party hereto (each, a “Purchaser” and collectively, the “Purchasers”). This Agreement is made pursuant to the Securities Purchase

June 25, 2025 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 20, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation

June 25, 2025 EX-10.1

Securities Purchase Agreement, dated June 20, 2025

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of June 20, 2025, between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and each of the purchasers identified on the signature pages hereto (each, including its successors and assigns, an “Purchaser” and collectively the “Purchasers”). RECITALS A. The Compa

May 28, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation)

May 15, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2025 SHUTTLE PHARMACEUTICA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation)

May 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2025 OR ☐ Transition Report PURSUANT TO Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-41488 SHUTTLE PH

May 6, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☒ Def

April 22, 2025 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☐ Def

April 21, 2025 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☒ Def

April 21, 2025 EX-99.1

Shuttle Pharma to Present at the Planet MicroCap Showcase: VEGAS 2025 on April 23, 2025 Company to conduct 1x1 meetings on April 24, 2025

Exhibit 99.1 Shuttle Pharma to Present at the Planet MicroCap Showcase: VEGAS 2025 on April 23, 2025 Company to conduct 1x1 meetings on April 24, 2025 GAITHERSBURG, Md., April 21, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treat

April 21, 2025 8-K

Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 21, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

April 10, 2025 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☐ Def

April 10, 2025 EX-99.1

Shuttle Pharma Files Provisional Patent for PSMA Ligand Conjugates to Treat Prostate Cancer Filing provisional patent application with the USPTO entitled “PSMA-Targeted PARP Inhibitor conjugates for Precision Cancer Therapy” key to advancement of Dia

Exhibit 99.1 Shuttle Pharma Files Provisional Patent for PSMA Ligand Conjugates to Treat Prostate Cancer Filing provisional patent application with the USPTO entitled “PSMA-Targeted PARP Inhibitor conjugates for Precision Cancer Therapy” key to advancement of Diagnostic program Dr. Alan Kozikowski, internationally acclaimed pioneer in the discovery of a critical PSMA targeting ligand for clinical

April 10, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 10, 2025 SHUTTLE PHARMACEUT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 10, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

April 4, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 3, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation

April 4, 2025 EX-10.1

Consulting Agreement, dated April 3, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and IR Agency LLC.

Exhibit 10.1 CONSULTING AGREEMENT IR Agency LLC (the “Consultant” or “IR Agency”) is pleased to provide certain consulting services to Shuttle Pharmaceuticals Holdings Inc (“you,” “Client” or “Company”) as more fully described in this agreement (the “Agreement”). This Agreement sets forth the terms and conditions pursuant to which Company engages Consultant to provide such services. 1. Consulting

March 31, 2025 EX-10.1

Form of Employment Agreement, dated March 31, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and Anatoly Dritschilo.

Exhibit 10.1 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This Amended and Restated Employment Agreement (the “Agreement”), originally dated June 28, 2019 (the “Original Employment Agreement”), is entered into as of the 31st day of March 2025, by and between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and Anatoly Dritschilo, M.D., an individual residing at the addr

March 31, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

March 31, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☒ Def

March 31, 2025 ARS

ARS

2024 Nasdaq:SHPH ANNUAL REPORT PursuingaCure forCancer Wearedevelopingnoveltherapies designedtoincreasecancercure rates,prolongpatientsurvival,and improvequalityoflife.

March 25, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 21, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

March 25, 2025 EX-1.1

Consulting Agreement, dated March 21, 2025, by and between Shuttle Pharmaceuticals Holdings, Inc. and Bowery Consulting Group Inc.

Exhibit 1.1 CONSULTING SERVICES AGREEMENT THIS AGREEMENT DATED AS OF March 21st 2025 BETWEEN: Shuttle Pharmaceuticals Holdings Inc. A proprietorship registered in the State of Maryland (hereinafter referred to as the “Firm”) -and- Bowery Consulting Group Inc. A corporation registered in the State of Florida (hereinafter referred to as the “Consultant”) A. RECITALS WHEREAS the Firm carries on busin

March 19, 2025 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☐ Def

March 13, 2025 EX-99.2

Shuttle Pharma Announces Closing of $5.75 Million Underwritten Offering

Exhibit 99.2 Shuttle Pharma Announces Closing of $5.75 Million Underwritten Offering GAITHERSBURG, Md., March 13, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), announced today the closing of its previously annou

March 13, 2025 EX-1.1

Underwriting Agreement, dated March 12, 2025, by and between Shuttle Pharmaceuticals Holdings, Inc. and WestPark Capital, Inc.

Exhibit 1.1 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. UNDERWRITING AGREEMENT March 12, 2025 WestPark Capital, Inc. 1800 Century Park East, Suite 220 Los Angeles, CA 90067 As Representative of the Several underwriters, if any, named in Schedule I hereto Ladies and Gentlemen: The undersigned, SHUTTLE PHARMACEUTICALS HOLDINGS, INC., a corporation formed under the laws of the State of Delaware (the “Comp

March 13, 2025 EX-99.1

Shuttle Pharma Announces Pricing of $5.75 Million Underwritten Offering

Exhibit 99.1 Shuttle Pharma Announces Pricing of $5.75 Million Underwritten Offering GAITHERSBURG, Md., March 12, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), announced today the pricing of an underwritten publ

March 13, 2025 8-K

Entry into a Material Definitive Agreement, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Regulation FD Disclosure, Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

March 13, 2025 424B3

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 1,340,921 Shares of Common Stock 17,825,746 Pre-Funded Warrants to Purchase 17,825,746 Shares of Common Stock 17,825,746 Shares of Common Stock Underlying the Pre-Funded Warrants

Filed pursuant to Section 424(b)(3) Registration No. 333-284889 PROSPECTUS SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 1,340,921 Shares of Common Stock 17,825,746 Pre-Funded Warrants to Purchase 17,825,746 Shares of Common Stock 17,825,746 Shares of Common Stock Underlying the Pre-Funded Warrants This is a firm commitment underwritten offering of 1,340,921 shares (the “Shares”) of common stock, par val

March 12, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 11, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

March 12, 2025 EX-99.1

Shuttle Pharma Announces Appointment of Christopher Cooper as Interim Co-CEO to Enhance Business Activities Dr. Anatoly Dritschilo remains Chairman of the Board and Co-CEO overseeing scientific and clinical trial activities

Exhibit 99.1 Shuttle Pharma Announces Appointment of Christopher Cooper as Interim Co-CEO to Enhance Business Activities Dr. Anatoly Dritschilo remains Chairman of the Board and Co-CEO overseeing scientific and clinical trial activities GAITHERSBURG, Md., March 12, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage sp

March 12, 2025 EX-10.1

Consulting Agreement, dated March 11, 2025 (incorporated by reference to 8-K filed March 12, 2025)

Exhibit 10.1 CONSULTIng AGREEMENT THIS AGREEMENT (the “Agreement”) is dated effective March 11, 2025 (the “Effective Date”). BETWEEN: SHUTTLE PHARMACEUTICALS a corporation having an office located at 401 Professional Drive, Suite 260, Gaithersburg, MD 20879 (the “Company”) AND: NUMBER 2 CAPITAL CORP., a corporation with its principal residence located at 5630 Olympic Street, Vancouver, British Col

March 6, 2025 CORRESP

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212 March 6, 2025 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 File No. 333-284889 Acceleration Request Requested Date: Friday, March 7,

March 6, 2025 CORRESP

WestPark Capital, Inc. 1800 Century Park East, Suite 220 Los Angeles, CA 90067

WestPark Capital, Inc. 1800 Century Park East, Suite 220 Los Angeles, CA 90067 March 6, 2025 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 File No. 333-284889 Acceleration Request Requested Date: Friday, March 7, 2025 Requested Time: 4:30 PM Ea

March 5, 2025 EX-4.9

Form of Pre-Funded Warrant (incorporated by reference to S-1/A filed March 5, 2025)

Exhibit 4.9 FORM OF PRE-FUNDED COMMON STOCK PURCHASE WARRANT SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Warrant Shares: Issue Date: , 2025 Initial Exercise Date: , 2025 THIS PRE-FUNDED COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set f

March 5, 2025 EX-3.6

Third Amended and Restated By-Laws.

Exhibit 3.6 SHUTTLE PHARMAceuticals holdings, inc. Incorporated Under the Laws of the State of Delaware THIRD AMENDED AND RESTATED BY-LAWS ARTICLE I OFFICES Shuttle Pharmaceuticals Holdings, Inc. (the “Corporation”) shall maintain a registered office in the State of Delaware. The Corporation may also have other offices at such places, either within or without the State of Delaware, as the Board of

March 5, 2025 S-1/A

As filed with the Securities and Exchange Commission on March 4, 2025.

As filed with the Securities and Exchange Commission on March 4, 2025. Registration No. 333-284889 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 (Amendment No. 1) REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 82-5089826 (State or other jurisdictio

March 5, 2025 EX-1.1

Form of Underwriting Agreement

Exhibit 1.1 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. FORM OF UNDERWRITING AGREEMENT March [*], 2025 WestPark Capital, Inc. 1800 Century Park East, Suite 220 Los Angeles, CA 90067 As Representative of the Several underwriters, if any, named in Schedule I hereto Ladies and Gentlemen: The undersigned, SHUTTLE PHARMACEUTICALS HOLDINGS, INC., a corporation formed under the laws of the State of Delaware (

February 28, 2025 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

February 28, 2025 EX-10.1

Revolving Loan Agreement, dated February 28, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and Bowery Consulting Group Inc. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed February 28, 2025).

Exhibit 10.1 REVOLVING LOAN AGREEMENT This Revolving Loan Agreement (this “Agreement”) is dated as of February 28, 2025 between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Borrower”), and the purchaser identified on the signature page hereto (including its successors and assigns, the “Lender”). WHEREAS, Borrower wishes to obtain Loans from time to time from Lender in an ag

February 28, 2025 EX-10.2

Revolving Note, dated February 28, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and Bowery Consulting Group Inc. (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed February 28, 2025).

Exhibit 10.2 REVOLVING NOTE February 28, 2025 $2,000,000 FOR VALUE RECEIVED, Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (“Borrower”) HEREBY PROMISES TO PAY to the order of Bowery Consulting Group Inc. (together with its successors, participants and assigns, “Lender”), in lawful money of the United States of America and in immediately available funds, the principal amount of TWO

February 27, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

February 27, 2025 EX-1

CONSENT OF FORVIS MAZARS, LLP

Consent of Independent Registered Public Accounting Firm We consent to the inclusion in this Prospectus Supplement No.

February 27, 2025 EX-1

CONSENT OF FORVIS MAZARS, LLP

Consent of Independent Registered Public Accounting Firm We consent to the inclusion in this Prospectus Supplement No.

February 27, 2025 424B3

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 9,744,605 Shares of Common Stock Issuable Upon Conversion of 5% Senior Secured Convertible Notes Up to 1,018,079 Shares of Common Stock Issuable Upon Exercise of Warrants

Filed Pursuant to Section 424(b)(3) Registration No. 333-269414 Prospectus Supplement No. 4 (To Prospectus Dated February 1, 2023) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 9,744,605 Shares of Common Stock Issuable Upon Conversion of 5% Senior Secured Convertible Notes Up to 1,018,079 Shares of Common Stock Issuable Upon Exercise of Warrants This prospectus supplement No. 4 updates, amends and

February 27, 2025 424B3

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 1,464,268 Shares of Common Stock Issuable Upon Conversion of 14.5% Senior Secured Convertible Notes Up to 329,461 Shares of Common Stock Issuable Upon Exercise of Warrants

Filed Pursuant to Section 424(b)(3) Registration No. 333-284286 Prospectus Supplement No. 1 (To Prospectus Dated January 23, 2025) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 1,464,268 Shares of Common Stock Issuable Upon Conversion of 14.5% Senior Secured Convertible Notes Up to 329,461 Shares of Common Stock Issuable Upon Exercise of Warrants This prospectus supplement No. 1 updates, amends and

February 27, 2025 EX-10.1

Amendment Agreement, dated February 26, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and Alto Opportunity Master Fund, SPC – Segregated Master Portfolio B (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed February 27, 2025).

Exhibit 10.1 Amendment Agreement This Amendment Agreement (this “Amendment”), dated as of February 26, 2025, is made by and between Alto Opportunity Master Fund, SPC – Segregated Master Portfolio B, in its capacity as the registered holder (the “Holder”), Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”) and each Guarantor signatory hereto. WHEREAS, the Company and the

February 27, 2025 424B3

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 395,574 Shares of Common Stock 2,555,246 Pre-Funded Warrants to Purchase up to 2,555,246 Shares of Common Stock 2,950,820 Common Warrants to Purchase up to 2,950,820 Shares of Common Stock 2,555,246 Shares of Co

Filed Pursuant to Section 424(b)(3) Registration No. 333-282231 Prospectus Supplement No. 1 (To Prospectus Dated October 29, 2024) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 395,574 Shares of Common Stock 2,555,246 Pre-Funded Warrants to Purchase up to 2,555,246 Shares of Common Stock 2,950,820 Common Warrants to Purchase up to 2,950,820 Shares of Common Stock 2,555,246 Shares of Common Stock Underlyi

February 27, 2025 EX-1

CONSENT OF FORVIS MAZARS, LLP

Consent of Independent Registered Public Accounting Firm We consent to the inclusion in this Prospectus Supplement No.

February 26, 2025 EX-10.1

Press Release dated February 26, 2025

Exhibit 10.1 Shuttle Pharma Provides Corporate Update and Reports 2024 Results GAITHERSBURG, Md., February 26, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today provided a corporate update in

February 26, 2025 EX-21

List of Subsidiaries*

Exhibit 21 List of Subsidiaries Shuttle Pharmaceuticals, Inc., a Maryland corporation Shuttle Diagnostics, Inc., a Maryland corporation

February 26, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-41488 Shuttle Pharma

February 26, 2025 8-K

Results of Operations and Financial Condition, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

February 19, 2025 LETTER

LETTER

February 19, 2025 Anatoly Dritschilo, M.D. Chief Executive Officer Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 Filed February 13, 2025 File No. 333-284889 Dear Anatoly Dritschilo M.D.: This is to advise you that we have not reviewed and will not review your registration

February 13, 2025 S-1

As filed with the Securities and Exchange Commission on February 12, 2025.

As filed with the Securities and Exchange Commission on February 12, 2025. Registration No. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 82-5089826 (State or other jurisdiction of incorporation or org

February 13, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-1 (Form Type) SHUTTLE PHARMACEUTICALS HOLDINGS, INC.

January 28, 2025 EX-10.1

Change Order, dated January 23, 2025, between Shuttle Pharmaceuticals, Inc. and Theradex Systems, Inc. (incorporated by reference to Exhibit 10.1 to the Current report on Form 8-K filed January 28, 2025).

Exhibit 10.1 Portions of this agreement have been redacted pursuant to Item 601(b)(10(iv). Redactions are indicated with “[***]” Change Order #1 to Work Order #3 Theradex Systems, Inc. (hereinafter “Theradex Oncology”) to assist Shuttle Pharmaceuticals, Inc. (hereinafter “Shuttle”) with the Scope of Work associated with: Phase 2 Study of IPdR as a Radiation Sensitizing Agent During Radiotherapy in

January 28, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 23, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

January 24, 2025 424B3

Up to 1,464,268 Shares of Common Stock Issuable Upon Conversion of 14.5% Senior Secured Convertible Notes Up to 329,461 Shares of Common Stock Issuable Upon Exercise of Warrants

Filed Pursuant to Rule 424(b)(3) Registration Statement No. 333-284286 PROSPECTUS Up to 1,464,268 Shares of Common Stock Issuable Upon Conversion of 14.5% Senior Secured Convertible Notes Up to 329,461 Shares of Common Stock Issuable Upon Exercise of Warrants This prospectus relates to the resale from time to time of (i) up to 1,464,268 shares of common stock underlying $831,579 in convertible not

January 22, 2025 RW

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212 January 21, 2025 Via EDGAR Ms. Jessica Dickerson U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 File No. 333-278535 Dear Ms. Dickerson: Pursuant

January 21, 2025 CORRESP

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212 January 21, 2025 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 File No. 333-284286 Acceleration Request Requested Date: Thursday, Jan

January 21, 2025 EX-99.1

Shuttle Pharma Reaches Milestone in Patient Enrollment for Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma

Exhibit 99.1 Shuttle Pharma Reaches Milestone in Patient Enrollment for Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma GAITHERSBURG, Md., January 21, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with r

January 21, 2025 LETTER

LETTER

January 21, 2025 Anatoly Dritschilo Chief Executive Officer Shuttle Pharmaceuticals Holdings, Inc.

January 21, 2025 8-K

Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 21, 2025 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

January 15, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 (Form Type) Shuttle Pharmaceuticals Holdings, Inc.

January 15, 2025 S-1

As filed with the Securities and Exchange Commission on January 14, 2025.

As filed with the Securities and Exchange Commission on January 14, 2025. Registration No. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 82-5089826 (State or other jurisdiction of incorporation or orga

January 7, 2025 EX-99.1

Shuttle Pharma to Participate in the Lytham Partners 2025 Investor Healthcare Summit on January 13, 2025

Exhibit 99.1 Shuttle Pharma to Participate in the Lytham Partners 2025 Investor Healthcare Summit on January 13, 2025 GAITHERSBURG, Md., January 7, 2025 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today announced t

January 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 31, 2024 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 31, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

December 19, 2024 EX-99.1

Shuttle Pharma Enters into Sponsored Research Agreement with the University of California, San Francisco to Advance PSMA Development Program

Exhibit 99.1 Shuttle Pharma Enters into Sponsored Research Agreement with the University of California, San Francisco to Advance PSMA Development Program GAITHERSBURG, Md., December 19, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with rad

December 19, 2024 8-K

Entry into a Material Definitive Agreement, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (date of earliest event reported): December 16, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

December 19, 2024 EX-10.1

Sponsored Research Agreement, dated December 16, 2024, by and among Shuttle Pharmaceuticals Holdings, Inc., the Regents of the University of California and Dr. Robert Favell (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed December 19, 2024).

Exhibit 10.1 Certain identified information has been excluded from this exhibit because it both (i) is not material and (ii) would be competitively harmful if publicly disclosed. Such information is identified with “[***]” where such information has been omitted. SPONSORED RESEARCH AGREEMENT This Sponsored Research Agreement (“Agreement”), effective as of the date of last signature hereto (“Effect

November 26, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 26, 2024 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 26, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

November 26, 2024 EX-99.1

DRAFT – GOAL TO RELEASE AT TUESDAY, NOVEMBER 26 @ 9AM ET Shuttle Pharma Expands Patient Enrollment for Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma as UVA Cancer Center Doses Its First Patient

Exhibit 99.1 DRAFT – GOAL TO RELEASE AT TUESDAY, NOVEMBER 26 @ 9AM ET Shuttle Pharma Expands Patient Enrollment for Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma as UVA Cancer Center Doses Its First Patient GAITHERSBURG, Md., November 26, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage special

November 13, 2024 8-K

Results of Operations and Financial Condition, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 13, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

November 13, 2024 EX-99.1

Shuttle Pharma Provides Third Quarter 2024 Corporate Update

Exhibit 99.1 Shuttle Pharma Provides Third Quarter 2024 Corporate Update GAITHERSBURG, Md., November 13, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today provided a corporate update in connec

November 13, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-41488 SHUTT

November 1, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 31, 2024 (October 29, 202

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 31, 2024 (October 29, 2024) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdi

November 1, 2024 EX-4.1

Form of Common Warrant (incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated October 31, 2024)

Exhibit 4.1 FORM OF COMMON STOCK PURCHASE WARRANT Shuttle Pharmaceuticals Holdings, INC. Warrant Shares: [ ] Initial Dated Exercisable Date: [ ]I Issuance Date: [ ] THIS COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, [NAME OF HOLDER] or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter

November 1, 2024 EX-10.1

Form of Securities Purchase Agreement (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K dated October 31, 2024).

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of October 29, 2024, between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”). WHEREAS, subject to the ter

November 1, 2024 EX-99.1

Shuttle Pharmaceuticals Holdings, Inc. Announces Pricing of $4.5 Million Public Offering Priced At-The-Market Under Nasdaq Rules

Exhibit 99.1 Shuttle Pharmaceuticals Holdings, Inc. Announces Pricing of $4.5 Million Public Offering Priced At-The-Market Under Nasdaq Rules GAITHERSBURG, Md., Oct. 29, 2024 (GLOBE NEWSWIRE) — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patient

November 1, 2024 EX-4.2

Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K dated October 31, 2024)

Exhibit 4.2 FORM OF PRE-FUNDED COMMON STOCK PURCHASE WARRANT SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Warrant Shares: Initial Exercise Date: [] THIS PRE-FUNDED COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or

November 1, 2024 EX-1.1

Placement Agency Agreement, dated as of October 29, 2024, by and among Shuttle Pharmaceuticals Holdings, Inc. and A.G.P./Alliance Global Partners and Boustead Securities, LLC, as placement agents (incorporated by reference to Exhibit 1.1 to the Current Report on Form 8-K dated October 31, 2024).

Exhibit 1.1 October 29, 2024 Shuttle Pharmaceuticals Holdings, Inc. Attention: Dr. Anatoly Dritschilo, M.D. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 Dear Dr. Dritschilo: This letter (the “Agreement”) constitutes the agreement between A.G.P./Alliance Global Partners (“A.G.P.”), Boustead Securities, LLC (“Boustead” and together with A.G.P., the “Placement Agents”) and Shuttle Pharmac

October 31, 2024 424B4

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 395,574 Shares of Common Stock 2,555,246 Pre-Funded Warrants to Purchase up to 2,555,246 Shares of Common Stock 2,950,820 Common Warrants to Purchase up to 2,950,820 Shares of Common Stock 2,555,246 Shares of Co

Filed Pursuant to Rule 424(b)(4) PROSPECTUS Registration No. 333-282231 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 395,574 Shares of Common Stock 2,555,246 Pre-Funded Warrants to Purchase up to 2,555,246 Shares of Common Stock 2,950,820 Common Warrants to Purchase up to 2,950,820 Shares of Common Stock 2,555,246 Shares of Common Stock Underlying the Pre-Funded Warrants 2,950,820 Shares of Common Stock

October 29, 2024 EX-99.1

Shuttle Pharma Doses First Patients in Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma

Exhibit 99.1 Shuttle Pharma Doses First Patients in Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma GAITHERSBURG, Md., October 29, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT

October 29, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 29, 2024 SHUTTLE PHARMACE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 29, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

October 28, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2024 SHUTTLE PHARMACE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

October 28, 2024 EX-99.1

Shuttle Pharmaceuticals to Present at the 2024 ThinkEquity Conference on Wednesday, October 30, 2024

Exhibit 99.1 Shuttle Pharmaceuticals to Present at the 2024 ThinkEquity Conference on Wednesday, October 30, 2024 ROCKVILLE, MD., October 28, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH), a discovery and development stage specialty pharmaceutical company focused on improving the outcomes of cancer patients treated with radiation therapy (“RT”), today announced that its Chief Execut

October 28, 2024 EX-99.2

Investor Presentation

Exhibit 99.2

October 28, 2024 EX-99.1

Shuttle Pharma Completes Clinical Trial Site Enrollment for Phase 2 of Ropidoxuridine for Treatment of Patients with Glioblastoma

Exhibit 99.1 Shuttle Pharma Completes Clinical Trial Site Enrollment for Phase 2 of Ropidoxuridine for Treatment of Patients with Glioblastoma GAITHERSBURG, Md., October 28 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therap

October 28, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

October 25, 2024 CORRESP

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 (240) 430-4212 October 25, 2024 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1, as amended File No. 333-282231 Acceleration Request Requested Date: T

October 25, 2024 CORRESP

A.G.P. / Alliance Global Partners 590 Madison Ave., 28th Floor New York, NY 10022

A.G.P. / Alliance Global Partners 590 Madison Ave., 28th Floor New York, NY 10022 October 25, 2024 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1, as amended File No: 333-282231 Ladies and Gentlemen: Pursuant to Rule 461 promulgated under the Se

October 25, 2024 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

October 18, 2024 EX-10.61

Form of Securities Purchase Agreement

Exhibit 10.61 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of [●] 2024, between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”). WHEREAS, subject to the terms and

October 18, 2024 EX-4.6

Form of Common Warrants

Exhibit 4.6 FORM OF COMMON STOCK PURCHASE WARRANT Shuttle Pharmaceuticals Holdings, INC. Warrant Shares: [ ] Initial Dated Exercisable Date: [ ]I Issuance Date: [ ] THIS COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, [NAME OF HOLDER] or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter

October 18, 2024 S-1/A

As filed with the Securities and Exchange Commission on October 18, 2024

As filed with the Securities and Exchange Commission on October 18, 2024 Registration No.

October 18, 2024 EX-1.1

Form of Placement Agency Agreement

Exhibit 1.1 [], 2024 Shuttle Pharmaceuticals Holdings, Inc. Attention: Dr. Anatoly Dritschilo, M.D. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 Dear Dr. Dritschilo: This letter (the “Agreement”) constitutes the agreement between A.G.P./Alliance Global Partners (“A.G.P.”), Boustead Securities, LLC (“Boustead” and together with A.G.P., the “Placement Agents”) and Shuttle Pharmaceuticals

October 18, 2024 CORRESP

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879

Shuttle Pharmaceuticals Holdings, Inc. 401 Professional Drive, Suite 260 Gaithersburg, MD 20879 October 18, 2024 Division of Corporation Finance Office of Life Sciences U.S. Securities and Exchange Commission Washington, D.C. 20549 Attn: Ms. Jessica Dickerson Re: Shuttle Pharmaceuticals Holdings, Inc. Registration Statement on Form S-1 Filed September 20, 2024 File No. 333-282231 Ladies and Gentle

October 18, 2024 EX-4.7

Form of Pre-Funded Warrants

Exhibit 4.7 FORM OF PRE-FUNDED COMMON STOCK PURCHASE WARRANT SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Warrant Shares: Initial Exercise Date: [] THIS PRE-FUNDED COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or

October 18, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 (Form Type) Shuttle Pharmaceuticals Holdings, Inc.

October 17, 2024 EX-10.2

Form of Senior Secured Convertible Notes (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed on October 17, 2024).

Exhibit 10.2 NEITHER THE ISSUANCE AND SALE OF THE SECURITIES REPRESENTED BY THIS NOTE NOR THE SECURITIES INTO WHICH THIS NOTE IS CONVERTIBLE HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES

October 17, 2024 EX-10.1

Form of Securities Purchase Agreement (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on October 17, 2024).

Exhibit 10.1 Form of SECURITIES Purchase Agreement This Securities Purchase Agreement, dated as of October [*], 2024 (this “Agreement”), is entered into by and among Shuttle Pharmaceuticals Holdings Inc., a Delaware corporation (the “Company”), and the persons and entities listed on the signature page hereto (each an “Investor” and, collectively, the “Investors”). RECITALS A. On the terms and subj

October 17, 2024 EX-10.3

Form of Common Warrants (incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed on October 17, 2024).

Exhibit 10.3 Form of Common Stock Warrant NEITHER THE ISSUANCE AND SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE NOR THE SECURITIES INTO WHICH THESE SECURITIES ARE EXERCISABLE HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABS

October 17, 2024 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 14, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

October 4, 2024 LETTER

LETTER

October 4, 2024 Anatoly Dritschilo Chief Executive Officer Shuttle Pharmaceuticals Holdings, Inc.

September 20, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 (Form Type) Shuttle Pharmaceuticals Holdings, Inc.

September 20, 2024 S-1

As filed with the Securities and Exchange Commission on September 19, 2024

As filed with the Securities and Exchange Commission on September 19, 2024 Registration No.

September 16, 2024 424B3

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 9,744,605 Shares of Common Stock Issuable Upon Conversion of 5% Senior Secured Convertible Notes Up to 1,018,079 Shares of Common Stock Issuable Upon Exercise of Warrants

Filed Pursuant to Section 424(b)(3) Registration No. 333-269414 Prospectus Supplement No. 3 (To Prospectus Dated February 1, 2023) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 9,744,605 Shares of Common Stock Issuable Upon Conversion of 5% Senior Secured Convertible Notes Up to 1,018,079 Shares of Common Stock Issuable Upon Exercise of Warrants This prospectus supplement No. 3 updates, amends and

September 13, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 10, 2024 SHUTTLE PHARMA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 10, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpor

September 10, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 4, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

September 10, 2024 EX-10.1

Form of Promissory Note, dated September 4, 2024, between Shuttle Pharmaceuticals and Anatoly Dritschilo. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed September 10, 2024).

Exhibit 10.1 PROMISSORY NOTE $250,000.00 September 4,2024 Maryland, United States For value received, Shuttle Pharmaceutical Holdings, Inc., a Delaware company (the “Company”), promises to pay to Anatoly Dritschilo (the “Holder”), the principal sum of $250,000.00 (the “Principal”). Interest shall accrue from the date of this Promissory Note (this “Note”) on the unpaid principal amount at a rate eq

September 4, 2024 EX-21

List of Subsidiaries.

Exhibit 21 List of Subsidiaries Shuttle Pharmaceuticals, Inc., a Maryland corporation Shuttle Diagnostics, Inc., a Maryland corporation

September 4, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-

September 4, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report UNDER Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2024 OR ☐ Transition Report UNDER Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-41488 SHUTTLE PHARMACEUTICALS

September 4, 2024 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) ☒ Quarterly Report UNDER Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2024 OR ☐ Transition Report UNDER Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-41488 SH

September 4, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (date of earliest event reported): September 4, 2024 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (date of earliest event reported): September 4, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

September 4, 2024 EX-99.1

Shuttle Pharma Provides Second Quarter 2024 Corporate Update

Exhibit 99.1 Shuttle Pharma Provides Second Quarter 2024 Corporate Update GAITHERSBURG, Md., September 4, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today provided a corporate update in connection with the fi

August 28, 2024 EX-99.1

Shuttle Pharma Regains Compliance with Nasdaq Minimum Bid Price Requirement

Exhibit 99.1 Shuttle Pharma Regains Compliance with Nasdaq Minimum Bid Price Requirement GAITHERSBURG, Md., August 28, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today announced that it has r

August 28, 2024 8-K

Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (date of earliest event reported): August 27, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporati

August 26, 2024 EX-99.1

Shuttle Pharma Receives Notice of Nasdaq Non-Compliance with Listing Rule 5250(c)(1)

Exhibit 99.1 Shuttle Pharma Receives Notice of Nasdaq Non-Compliance with Listing Rule 5250(c)(1) GAITHERSBURG, Md., August 26, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today reports that i

August 26, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (date of earliest event reported): August 21, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporati

August 14, 2024 EX-99.1

Shuttle Pharma Ready to Enroll patients in Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma

Exhibit 99.1 Shuttle Pharma Ready to Enroll patients in Phase 2 Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma GAITHERSBURG, Md., August 14, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy

August 14, 2024 EX-10.1

Work Order, dated August 8, 2024, between Shuttle Pharmaceuticals, Inc. and Theradex Systems, Inc. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on August 14, 2024).

Exhibit 10.1 Portions of this agreement have been redacted pursuant to Item 601(b)(10)(iv) of Regulation S-K. Redactions are indicated with “[***].” Work Order #3 Theradex Systems, Inc. (hereinafter “Theradex Oncology”) to assist Shuttle Pharmaceuticals, Inc. (hereinafter “Shuttle”) with the Scope of Work associated with: Phase 2 Study of IPdR as a Radiation Sensitizing Agent During Radiotherapy i

August 14, 2024 EX-10.2

Master Services Agreement, dated November 1, 2018, between Shuttle Pharmaceuticals, Inc. and Theradex Systems Inc. (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed August 14, 2024).

Exhibit 10.2

August 14, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 SHUTTLE PHARMACEUT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

August 13, 2024 NT 10-Q

U.S. SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 FORM 12b-25 Commission File Number 001-41488 NOTIFICATION OF LATE FILING (Check One):

U.S. SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 FORM 12b-25 Commission File Number 001-41488 NOTIFICATION OF LATE FILING (Check One): ☐ Form 10-K ☐ Form 11-K ☐ Form 20-F ☒ Form 10-Q ☐ Form N-SAR For Period Ended: June 30, 2024 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 10-Q ☐ Transition Report on Form 20-F ☐ Transition Report on Form N-SAR ☐ Transition Report on For

August 7, 2024 EX-10.1

Amendment Agreement, dated August 6, 2024, between Shuttle Pharmaceuticals Holdings, Inc., Shuttle Pharmaceuticals, Inc. and Alto Opportunity Master Fund, SPC – Segregated Master Portfolio B (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on August 7, 2024).

Exhibit 10.1 Amendment Agreement This Amendment Agreement (this “Amendment”), dated as of August 6, 2024, is made by and between Alto Opportunity Master Fund, SPC – Segregated Master Portfolio B, in its capacity as the registered holder (the “Holder”), Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”) and each Guarantor signatory hereto. WHEREAS, the Company and the Bu

August 7, 2024 EX-3.1

Certificate of Amendment to Amended and Restated Certificate of Incorporation, effective August 13, 2024 (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K filed on August 7, 2024).

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SHUTTLE PHARMACEUTICALS HOLDINGS, INC. The undersigned, being the Chief Executive Officer of Shuttle Pharmaceuticals Holdings, Inc., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), does hereby amend and certify as follows: 1. That the name of the Corporatio

August 7, 2024 8-K

Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Other Events, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (date of earliest event reported): August 5, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

August 1, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of report (date of earliest event reported): July 31, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation

July 16, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 10, 2024 SHUTTLE PHARMACEUTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 10, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation

June 20, 2024 ARS

ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-41488 Shuttle Pharmaceut

June 20, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☒ Def

June 18, 2024 EX-99.1

Shuttle Pharma Appoints Timothy Lorber as Chief Financial Officer Current CFO, Michael Vander Hoek, transitions to full-time Vice President, Regulatory

Exhibit 99.1 Shuttle Pharma Appoints Timothy Lorber as Chief Financial Officer Current CFO, Michael Vander Hoek, transitions to full-time Vice President, Regulatory GAITHERSBURG, Md., June 18, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated w

June 18, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 13, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation

June 18, 2024 EX-10.1

Employment Agreement, dated June 13, 2024, between Shuttle Pharmaceuticals Holdings, Inc. and Timothy J. Lorber (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on June 18, 2024).

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”), effective as of the 10th day June, 2024, is entered into by and between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company”), and Timothy J. Lorber, CPA, an individual residing at the address set forth on Schedule A hereto (the “Executive”). INTRODUCTION WHEREAS, the Company is in the business

June 10, 2024 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☐ Def

May 22, 2024 EX-99.1

Shuttle Pharma to Participate in the Lytham Partners Spring 2024 Investor Conference on May 30, 2024

Exhibit 99.1 Shuttle Pharma to Participate in the Lytham Partners Spring 2024 Investor Conference on May 30, 2024 ROCKVILLE, Md., May 22, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH), a discovery and development stage specialty pharmaceutical company focused on improving the outcomes of cancer patients treated with radiation therapy (RT), today announced that Dr. Anatoly Dritschilo

May 22, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 22, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation)

May 14, 2024 EX-99.1

Shuttle Pharma Provides First Quarter 2024 Corporate Update

Exhibit 99.1 Shuttle Pharma Provides First Quarter 2024 Corporate Update GAITHERSBURG, Md., May 14, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today provided a corporate update in connection with the filing o

May 14, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2024 SHUTTLE PHARMACEUTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporation)

May 13, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report UNDER Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2024 OR ☐ Transition Report UNDER Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-41488 SHUTTLE PHARMACEUTICAL

April 29, 2024 EX-99.1

Investor Presentation

Exhibit 99.1

April 29, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2024 SHUTTLE PHARMACEUT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

April 23, 2024 EX-99.1

Shuttle Pharmaceuticals to Present at the Planet MicroCap Showcase: VEGAS 2024 on Wednesday, May 1, 2024 & 1x1 Meetings on Thursday, May 2, 2024

Exhibit 99.1 Shuttle Pharmaceuticals to Present at the Planet MicroCap Showcase: VEGAS 2024 on Wednesday, May 1, 2024 & 1x1 Meetings on Thursday, May 2, 2024 GAITHERSBURG, MD., April 23, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH), a discovery and development stage specialty pharmaceutical company focused on improving the outcomes of cancer patients treated with radiation therapy

April 23, 2024 8-K

Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

April 5, 2024 S-1

As filed with the U.S. Securities and Exchange Commission on April 5, 2024

As filed with the U.S. Securities and Exchange Commission on April 5, 2024 Registration No. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Shuttle Pharmaceuticals Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 2834 82-5089826 (State or other jurisdiction of incorporation or org

April 5, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-1 (Form Type) Shuttle Pharmaceuticals Holdings, Inc.

March 22, 2024 8-K

Results of Operations and Financial Condition, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 22, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporatio

March 22, 2024 424B3

SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 9,744,605 Shares of Common Stock Issuable Upon Conversion of 5% Senior Secured Convertible Notes Up to 1,018,079 Shares of Common Stock Issuable Upon Exercise of Warrants

Filed Pursuant to Section 424(b)(3) Registration No. 333-269414 Prospectus Supplement No. 2 (To Prospectus Dated February 1, 2023) SHUTTLE PHARMACEUTICALS HOLDINGS, INC. Up to 9,744,605 Shares of Common Stock Issuable Upon Conversion of 5% Senior Secured Convertible Notes Up to 1,018,079 Shares of Common Stock Issuable Upon Exercise of Warrants This prospectus supplement No. 2 updates, amends and

March 22, 2024 EX-99.1

Shuttle Pharma Provides Fourth Quarter 2023 Corporate Update

Exhibit 99.1 Shuttle Pharma Provides Fourth Quarter 2023 Corporate Update GAITHERSBURG, Md., March 22, 2024 - Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today provided a corporate update in connection with the filin

March 21, 2024 EX-21

List of Subsidiaries (incorporated by reference to Exhibit 21 to the Annual Report on Form 10-K filed on March 21, 2024).

Exhibit 21 List of Subsidiaries Shuttle Pharmaceuticals, Inc., a Maryland corporation Shuttle Diagnostics, Inc., a Maryland corporation

March 21, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-41488 Shuttle Pharma

March 5, 2024 EX-99.1

Shuttle Pharmaceuticals to Present at the Emerging Growth Conference on March 6, 2024 Webcast presentation to take place at 11:25am ET

Exhibit 99.1 Shuttle Pharmaceuticals to Present at the Emerging Growth Conference on March 6, 2024 Webcast presentation to take place at 11:25am ET ROCKVILLE, MD., March 5, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH), a discovery and development stage specialty pharmaceutical company focused on improving the outcomes of cancer patients treated with radiation therapy (“RT”), today

March 5, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 29, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

February 13, 2024 EX-99.1

Shuttle Pharma Announces Its Intent to Pursue a Rights Offering

Exhibit 99.1 Shuttle Pharma Announces Its Intent to Pursue a Rights Offering ROCKVILLE, Md., February 13, 2024 - Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“SHPH” or the “Company”), a discovery and development stage specialty pharmaceutical company focused on improving the outcomes of cancer patients treated with radiation therapy (RT), along with its wholly-owned subsidiary, Shuttle D

February 13, 2024 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 7, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of Incorporat

February 13, 2024 EX-10.3

Offering Deposit Account Agency Agreement, dated February 7, 2024, between Shuttle Pharmaceuticals Holdings, Inc., Boustead Securities, LLC and Sutter Securities Inc. (incorporated by reference to Exhibit 10.3 to the Current Report on Form 10-K filed on February 13, 2024).

Exhibit 10.3 OFFERING DEPOSIT ACCOUNT AGENCY AGREEMENT This Offering Deposit Account Agency Agreement (this “Agreement”) dated as of February 7, 2024 by and among Shuttle Pharmaceuticals Holdings, Inc. (the “Company”), having an address at 401 Professional Drive, Suite 260, Gaithersburg, MD 20879, its wholly owned subsidiary, Shuttle Diagnostics, Inc., a Delaware corporation (“Subsidiary” and toge

February 13, 2024 EX-10.2

Placement Agent and Advisory Services Agreement, dated February 7, 2024, between Shuttle Pharmaceuticals Holdings, Inc. and Boustead Securities, LLC (incorporated herein by reference to Exhibit 10.2 to the Current Report on Form 8-K filed on February 13, 2024).

Exhibit 10.2 PLACEMENT AGENT AND ADVISORY SERVICES AGREEMENT This PLACEMENT AGENT AND ADVISORY SERVICES AGREEMENT (the “Agreement”), dated as of February 7, 2024 (the “Effective Date”), by and between Boustead Securities, LLC (“BSL”), a California limited liability company having its principal offices located at 6 Venture, Suite 395, Irvine, CA 92618 and Shuttle Pharmaceuticals Holdings, Inc., a D

February 13, 2024 EX-10.1

Securities Purchase Agreement, dated February 7, 2024, between Shuttle Pharmaceuticals Holdings, Inc., Shuttle Diagnostics, Inc. and SRO LLC (incorporated herein by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on February 13, 2024).

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This SECURITIES PURCHASE AGREEMENT (this “Agreement”), effective as of February 7, 2024, is made by and between Shuttle Pharmaceuticals Holdings, Inc., a Delaware corporation (the “Company” or “SHPH”), its wholly owned subsidiary, Shuttle Diagnostics, Inc., a Delaware corporation (“Diagnostics” and together with the Company, the “Sellers”), and SRO, LLC,

February 5, 2024 8-K

Entry into a Material Definitive Agreement, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

February 5, 2024 EX-10.1

Asset Purchase Agreement, dated January 30, 2024, by and between Shuttle Pharmaceuticals Holdings, Inc., Alan Kozikowski and Werner Tueckmantel (incorporated herein by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on February 5, 2024).

Exhibit 10.1 ASSET PURCHASE AGREEMENT This ASSET PURCHASE AGREEMENT (“Agreement”) is entered into on January 30, 2024 (“Effective Date”) by and between Shuttle Pharmaceuticals Holdings, Inc. (a.k.a. Shuttle Pharma), a Delaware corporation with an office at 1 Research Court, Suite 450, Rockville, MD 20850 (“Purchaser”), and Alan P. KOZIKOWSKI, with domicile at N 3371 River Drive, Wallace MI 49893,

January 8, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (date of earliest event reported): January 8, 2024 SHUTTLE PHARMACEU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (date of earliest event reported): January 8, 2024 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporati

January 8, 2024 EX-99.1

Shuttle Pharmaceuticals Receives FDA approval to Proceed with Phase II Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma

Exhibit 99.1 Shuttle Pharmaceuticals Receives FDA approval to Proceed with Phase II Clinical Trial of Ropidoxuridine for Treatment of Patients with Glioblastoma ROCKVILLE, Md., January 8, 2024 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”) today announced they have received the ‘Safe to Proceed’ letter from the U.S. Food and Drug Administration (FDA) for the Company’s i

December 19, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 18, 2023 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 18, 2023 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

December 11, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 11, 2023 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

December 11, 2023 EX-99.1

Shuttle Pharmaceuticals Submits IND Application to the U.S. FDA for Ropidoxuridine Phase II Clinical Trial for Patients with Glioblastoma

Exhibit 99.1 Shuttle Pharmaceuticals Submits IND Application to the U.S. FDA for Ropidoxuridine Phase II Clinical Trial for Patients with Glioblastoma ROCKVILLE, Md., December 11, 2023 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH) (“Shuttle Pharma”) today announced submission of an Investigational New Drug (IND) application with the U.S. Food and Drug Administration (FDA) to support the

November 30, 2023 8-K

Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 30, 2023 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

November 30, 2023 EX-99.1

Shuttle Pharmaceuticals to Present at the Emerging Growth Conference on December 7, 2023 Webcasted presentation to take place at 10:15am ET

Exhibit 99.1 Shuttle Pharmaceuticals to Present at the Emerging Growth Conference on December 7, 2023 Webcasted presentation to take place at 10:15am ET ROCKVILLE, Md., Nov. 30, 2023 /PRNewswire/ — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH), a discovery and development stage specialty pharmaceutical company focused on improving the outcomes of cancer patients treated with radiation ther

November 14, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2023 SHUTTLE PHARMAC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2023 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorpora

November 14, 2023 EX-99.1

Shuttle Pharmaceuticals Provides Third Quarter 2023 Corporate Update

Exhibit 99.1 Shuttle Pharmaceuticals Provides Third Quarter 2023 Corporate Update ROCKVILLE, Md., November 14, 2023 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH), a discovery and development stage specialty pharmaceutical company focused on improving outcomes for cancer patients treated with radiation therapy (RT), today provided a corporate update in connection with the filing of its Qu

November 13, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-41488 SHUTT

October 30, 2023 EX-10.1

License Agreement, dated October 24, 2023, by and between Shuttle Pharmaceuticals Holdings, Inc. and Georgetown University (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on October 30, 2023).

Exhibit 10.1 This Exhibit 10.1 includes certain identified information that has been redacted because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed. Where information has been redacted, it has been so indicated by a “[***]”. LICENSE AGREEMENT between GEORGETOWN UNIVERSITY and SHUTTLE PHARMACEUTICALS HOLDINGS, INC. CONFIDENTIAL GU REF No.: 2018-012 LICENS

October 30, 2023 EX-99.1

Shuttle Pharma Advances Prostate Cancer Predictive Biomarker Program Through Exclusive License Agreement

Exhibit 99.1 Shuttle Pharma Advances Prostate Cancer Predictive Biomarker Program Through Exclusive License Agreement ROCKVILLE, Md., October 30, 2023 — Shuttle Pharmaceuticals Holdings, Inc. (Nasdaq: SHPH), a discovery and development stage specialty pharmaceutical company focused on improving the outcomes of cancer patients treated with radiation therapy (RT), today announced it has entered into

October 30, 2023 8-K

Other Events, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (date of earliest event reported): October 24, 2023 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-41488 82-5089826 (State or other jurisdiction of incorporat

October 20, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a - 101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a - 6(e)(2)) ☒ Def

October 20, 2023 ARS

ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number:001-41488 Shuttle Pharmac

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