블랙스톤 주식회사
MX ˙ BMV ˙ US09260D1072
SecurityMX:BX / Blackstone Inc.
InstitutionKampmann Melissa S.
Latest Disclosed Ownership18,590 shares
Latest Disclosed Value $ 2,137,664
Kampmann Melissa S. reports 16.52% decrease in ownership of BX / Blackstone Inc.

On April 23, 2026 - Kampmann Melissa S. filed a 13F-HR form disclosing ownership of 18,590 shares of Blackstone Inc. (MX:BX) valued at $2,137,664 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 22,270 shares of Blackstone Inc.. This represents a change in shares of -16.52% 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)
2026-04-23 2026-03-31 13F BLACKSTONE Common Stock 09260D107 18,590 -3,680 -16.52 2,138 -38.47 0.9273
2026-01-26 2025-12-31 13F BLACKSTONE Common Stock 09260D107 22,270 -50 -0.22 3,473 -8.92 1.3803
2025-10-09 2025-09-30 13F BLACKSTONE Common Stock 09260D107 22,320 35 0.16 3,813 14.40 2.7804
2025-07-24 2025-06-30 13F BLACKSTONE Common Stock 09260D107 22,285 -1,075 -4.60 3,333 2.08 2.5031
2025-04-25 2025-03-31 13F BLACKSTONE Common Stock 09260D107 23,360 -165 -0.70 3,265 -19.50 2.5810
2025-02-11 2024-12-31 13F BLACKSTONE Common Stock 09260D107 23,525 -2,270 -8.80 4,056 2.71 3.1910
2024-11-04 2024-09-30 13F BLACKSTONE Common Stock 09260D107 25,795 85 0.33 3,950 24.10 2.7930
2024-08-16 2024-06-30 13F BLACKSTONE Common Stock 09260D107 25,710 605 2.41 3,183 -3.52 2.3248
2024-05-15 2024-03-31 13F BLACKSTONE Common Stock 09260D107 25,105 3,200 14.61 3,298 15.03 2.3713
2024-02-22 2023-12-31 13F BLACKSTONE Common Stock 09260D107 21,905 305 1.41 2,868 23.90 2.4559
2024-02-20 2023-09-30 13F/A-1 BLACKSTONE Common Stock 09260D107 21,600 21,600 2,314 2.2329
2023-11-20 2023-09-30 13F BLACKSTONE Common Stock 09260D107 21,600 21,600 2,314 2.2329
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.