Blackstone Inc.
MX ˙ BMV ˙ US09260D1072
SecurityMX:BX / Blackstone Inc.
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership14,964 shares
Latest Disclosed Value $ 1,720,794
Vestmark Advisory Solutions, Inc. reports 59.07% increase in ownership of BX / Blackstone Inc.

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 14,964 shares of Blackstone Inc. (MX:BX) valued at $1,720,794 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 9,407 shares of Blackstone Inc.. This represents a change in shares of 59.07% during the quarter.

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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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 BLACKSTONE COM 09260D107 14,964 5,557 59.07 1,721 18.70 0.0118
2026-02-06 2025-12-31 13F BLACKSTONE COM 09260D107 9,407 7,771 475.00 1,450 419.35 0.0196
2025-11-10 2025-09-30 13F BLACKSTONE COM 09260D107 1,636 -3,255 -66.55 280 -61.83 0.0053
2025-08-06 2025-06-30 13F BLACKSTONE COM 09260D107 4,891 3,115 175.39 732 194.76 0.0106
2025-05-13 2025-03-31 13F BLACKSTONE COM 09260D107 1,776 -117 -6.18 248 -23.93 0.0064
2025-02-06 2024-12-31 13F BLACKSTONE COM 09260D107 1,893 1,893 326 0.0112
2024-08-12 2024-06-30 13F BLACKSTONE COM 09260D107 0 -2,190 -100.00 0 -100.00
2024-05-15 2024-03-31 13F BLACKSTONE COM 09260D107 2,190 -207 -8.64 288 -8.31 0.0124
2024-02-06 2023-12-31 13F BLACKSTONE COM 09260D107 2,397 140 6.20 314 29.88 0.0159
2023-11-06 2023-09-30 13F BLACKSTONE COM 09260D107 2,257 -2,687 -54.35 242 -47.49 0.0176
2023-08-07 2023-06-30 13F BLACKSTONE COM 09260D107 4,944 -349 -6.59 460 -1.08 0.0175
2023-05-09 2023-03-31 13F BLACKSTONE COM 09260D107 5,293 1,556 41.64 465 67.51 0.0201
2023-01-20 2022-12-31 13F BLACKSTONE COM 09260D107 3,737 -17,035 -82.01 277 -84.07 0.0135
2022-11-03 2022-09-30 13F BLACKSTONE COM 09260D107 20,772 2,382 12.95 1,739 3.64 0.0969
2022-08-04 2022-06-30 13F BLACKSTONE COM 09260D107 18,390 140 0.77 1,678 -27.58 0.0958
2022-04-27 2022-03-31 13F BLACKSTONE COM 09260D107 18,250 2,931 19.13 2,317 16.90 0.1312
2022-01-31 2021-12-31 13F BLACKSTONE COM 09260D107 15,319 -3,172 -17.15 1,982 -7.86 0.1118
2021-11-15 2021-09-30 13F BLACKSTONE COM 09260D107 18,491 -5,214 -22.00 2,151 -6.60 0.1457
2021-08-09 2021-06-30 13F BLACKSTONE GROUP COM 09260D107 23,705 -4,010 -14.47 2,303 11.47 0.1639
2021-05-10 2021-03-31 13F BLACKSTONE GROUP COM 09260D107 27,715 -3,434 -11.02 2,066 2.33 0.1833
2021-02-04 2020-12-31 13F BLACKSTONE GROUP COM CL A 09260D107 31,149 1,470 4.95 2,019 30.34 0.2266
2020-10-19 2020-09-30 13F BLACKSTONE GROUP COM CL A 09260D107 29,679 136 0.46 1,549 -7.47 0.2081
2020-08-13 2020-06-30 13F BLACKSTONE GROUP COM CL A 09260D107 29,543 1,137 4.00 1,674 29.37 0.2590
2020-05-06 2020-03-31 13F BLACKSTONE GROUP COM CL A 09260D107 28,406 -1,843 -6.09 1,294 -23.52 0.2530
2020-02-14 2019-12-31 13F BLACKSTONE GROUP COM CL A 09260D107 30,249 10,425 52.59 1,692 74.79 0.3472
2019-11-05 2019-09-30 13F BLACKSTONE GROUP COM CL A 09260D107 19,824 19,824 968 0.1570
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.