Guardant Health, Inc.
MX ˙ BMV ˙ US40131M1099
SecurityMX:GH / Guardant Health, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership921,395 shares
Latest Disclosed Value $ 85,109,256
Millennium Management Llc ownership in GH / Guardant Health, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 921,395 shares of Guardant Health, Inc. (MX:GH) valued at $85,109,256 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 583,807 shares of Guardant Health, Inc.. This represents a change in shares of 57.83% during the quarter.

Millennium Management Llc has a history of taking positions in derivatives of the underlying security (GH) in the form of stock options. The firm currently holds call options representing 95,200 of underlying shares valued at $8,793,624 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:GH / Guardant Health, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F GUARDANT HEALTH COM 40131M109 921,395 337,588 57.83 85,109 42.73 0.0354
2026-02-17 2025-12-31 13F GUARDANT HEALTH COM 40131M109 583,807 -294,769 -33.55 59,630 8.63 0.0251
2025-11-14 2025-09-30 13F GUARDANT HEALTH COM 40131M109 878,576 -1,843,305 -67.72 54,893 -61.25 0.0234
2025-08-14 2025-06-30 13F GUARDANT HEALTH COM 40131M109 2,721,881 1,625,148 148.18 141,647 203.18 0.0684
2025-05-15 2025-03-31 13F GUARDANT HEALTH COM 40131M109 1,096,733 -130,077 -10.60 46,721 24.66 0.0249
2025-02-14 2024-12-31 13F GUARDANT HEALTH COM 40131M109 1,226,810 572,835 87.59 37,479 149.83 0.0183
2024-11-14 2024-09-30 13F GUARDANT HEALTH COM 40131M109 653,975 -1,481,336 -69.37 15,002 -75.67 0.0071
2024-08-14 2024-06-30 13F GUARDANT HEALTH COM 40131M109 2,135,311 945,328 79.44 61,668 151.20 0.0286
2024-05-15 2024-03-31 13F GUARDANT HEALTH COM 40131M109 1,189,983 469,968 65.27 24,549 26.05 0.0105
2024-02-14 2023-12-31 13F GUARDANT HEALTH COM 40131M109 720,015 -1,999,855 -73.53 19,476 -75.84 0.0084
2023-11-14 2023-09-30 13F GUARDANT HEALTH COM 40131M109 2,719,870 285,692 11.74 80,617 -7.49 0.0407
2023-08-14 2023-06-30 13F GUARDANT HEALTH COM 40131M109 2,434,178 1,136,756 87.62 87,144 186.54 0.0430
2023-05-15 2023-03-31 13F GUARDANT HEALTH COM 40131M109 1,297,422 702,866 118.22 30,412 88.05 0.0174
2023-02-14 2022-12-31 13F GUARDANT HEALTH COM 40131M109 594,556 594,556 16,172 0.0089
2022-08-15 2022-06-30 13F GUARDANT HEALTH COM 40131M109 0 -6,137 -100.00 0 -100.00
2022-05-16 2022-03-31 13F GUARDANT HEALTH COM 40131M109 6,137 -28,409 -82.24 407 -88.22 0.0002
2022-02-14 2021-12-31 13F GUARDANT HEALTH COM 40131M109 34,546 -25,404 -42.38 3,455 -53.90 0.0018
2021-11-15 2021-09-30 13F GUARDANT HEALTH COM 40131M109 59,950 -239,359 -79.97 7,494 -79.84 0.0045
2021-08-16 2021-06-30 13F GUARDANT HEALTH COM 40131M109 299,309 -47,753 -13.76 37,171 -29.84 0.0228
2021-05-17 2021-03-31 13F GUARDANT HEALTH COM 40131M109 347,062 82,112 30.99 52,979 55.15 0.0379
2021-02-16 2020-12-31 13F GUARDANT HEALTH COM 40131M109 264,950 64,043 31.88 34,147 52.06 0.0247
2020-11-16 2020-09-30 13F GUARDANT HEALTH COM 40131M109 200,907 -122,363 -37.85 22,457 -14.37 0.0277
2020-08-14 2020-06-30 13F GUARDANT HEALTH COM 40131M109 323,270 323,270 26,227 0.0359
2020-05-14 2020-03-31 13F GUARDANT HEALTH COM 40131M109 0 -334,704 -100.00 0 -100.00
2020-02-14 2019-12-31 13F GUARDANT HEALTH COM 40131M109 334,704 207,105 162.31 26,154 221.14 0.0327
2019-11-14 2019-09-30 13F GUARDANT HEALTH COM 40131M109 127,599 -66,676 -34.32 8,144 -51.44 0.0129
2019-08-15 2019-06-30 13F/A-1 GUARDANT HEALTH COM 40131M109 194,275 194,275 16,772 0.0252
2019-08-14 2019-06-30 13F EMERALD EXPOSITIONS EVENTS I COM 40131M109 88,928 992 0.0015
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F GUARDANT HEALTH COM Call 95,200 188.48 8,794 160.92 n/a n/a n/a
2026-02-17 2025-12-31 13F GUARDANT HEALTH COM Call 33,000 -3.23 3,371 58.22 n/a n/a n/a
2025-11-14 2025-09-30 13F GUARDANT HEALTH COM Call 34,100 -68.92 2,131 -62.68 n/a n/a n/a
2025-08-14 2025-06-30 13F GUARDANT HEALTH COM Call 109,700 456.85 5,709 580.33 n/a n/a n/a
2025-05-15 2025-03-31 13F GUARDANT HEALTH COM Call 19,700 839 n/a n/a n/a
2025-02-14 2024-12-31 13F GUARDANT HEALTH COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F GUARDANT HEALTH COM Call 50,000 25.00 1,147 -0.69 n/a n/a n/a
2024-08-14 2024-06-30 13F GUARDANT HEALTH COM Call 40,000 173.97 1,155 283.72 n/a n/a n/a
2024-05-15 2024-03-31 13F GUARDANT HEALTH COM Call 14,600 -51.33 301 -62.89 n/a n/a n/a
2024-02-14 2023-12-31 13F GUARDANT HEALTH COM Call 30,000 -76.92 812 -78.95 n/a n/a n/a
2023-11-14 2023-09-30 13F GUARDANT HEALTH COM Call 130,000 3,853 n/a n/a n/a
2023-08-14 2023-06-30 13F GUARDANT HEALTH COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-15 2023-03-31 13F GUARDANT HEALTH COM Call 10,000 234 n/a n/a n/a
2021-11-15 2021-09-30 13F GUARDANT HEALTH COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F GUARDANT HEALTH COM Call 7,500 -59.68 931 -67.21 n/a n/a n/a
2021-05-17 2021-03-31 13F GUARDANT HEALTH COM Call 18,600 2,839 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-17 2025-12-31 13F GUARDANT HEALTH COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F GUARDANT HEALTH COM Put 10,000 -27.54 625 -13.09 n/a n/a n/a
2025-08-14 2025-06-30 13F GUARDANT HEALTH COM Put 13,800 -94.67 718 -93.49 n/a n/a n/a
2025-05-15 2025-03-31 13F GUARDANT HEALTH COM Put 258,900 629.30 11,029 917.44 n/a n/a n/a
2025-02-14 2024-12-31 13F GUARDANT HEALTH COM Put 35,500 -79.69 1,085 -72.96 n/a n/a n/a
2024-11-14 2024-09-30 13F GUARDANT HEALTH COM Put 174,800 4,010 n/a n/a n/a
2023-08-14 2023-06-30 13F GUARDANT HEALTH COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-15 2023-03-31 13F GUARDANT HEALTH COM Put 10,000 234 n/a n/a n/a
2021-11-15 2021-09-30 13F GUARDANT HEALTH COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F GUARDANT HEALTH COM Put 7,500 -59.68 931 -67.21 n/a n/a n/a
2021-05-17 2021-03-31 13F GUARDANT HEALTH COM Put 18,600 2,839 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.