블랙스톤 주식회사
MX ˙ BMV ˙ US09260D1072
SecurityMX:BX / Blackstone Inc.
InstitutionCalamos Advisors LLC
Latest Disclosed Ownership107,620 shares
Latest Disclosed Value $ 12,375,224
Calamos Advisors LLC reports 14.88% increase in ownership of BX / Blackstone Inc.

On May 4, 2026 - Calamos Advisors LLC filed a 13F-HR form disclosing ownership of 107,620 shares of Blackstone Inc. (MX:BX) valued at $12,375,224 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 93,682 shares of Blackstone Inc.. This represents a change in shares of 14.88% 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)
2026-05-04 2026-03-31 13F BLACKSTONE COM 09260D107 107,620 13,938 14.88 12,375 -14.30 0.0436
2026-01-29 2025-12-31 13F BLACKSTONE COM 09260D107 93,682 -3,804 -3.90 14,440 -13.30 0.0542
2025-10-20 2025-09-30 13F BLACKSTONE COM 09260D107 97,486 0 0.00 16,655 14.22 0.0615
2025-08-08 2025-06-30 13F BLACKSTONE COM 09260D107 97,486 0 0.00 14,582 7.01 0.0574
2025-04-29 2025-03-31 13F BLACKSTONE COM 09260D107 97,486 1,086 1.13 13,627 -18.02 0.0593
2025-01-24 2024-12-31 13F BLACKSTONE COM 09260D107 96,400 0 0.00 16,621 12.60 0.0695
2024-11-07 2024-09-30 13F BLACKSTONE COM 09260D107 96,400 -2,365 -2.39 14,762 20.72 0.0638
2024-07-25 2024-06-30 13F BLACKSTONE COM 09260D107 98,765 -70,177 -41.54 12,227 -44.91 0.0543
2024-05-08 2024-03-31 13F BLACKSTONE COM 09260D107 168,942 102,398 153.88 22,194 154.77 0.1051
2024-01-31 2023-12-31 13F BLACKSTONE COM 09260D107 66,544 -21 -0.03 8,712 22.16 0.0423
2023-10-26 2023-09-30 13F BLACKSTONE COM 09260D107 66,565 -18,781 -22.01 7,132 -10.12 0.0371
2023-07-28 2023-06-30 13F BLACKSTONE COM 09260D107 85,346 23,752 38.56 7,935 46.65 0.0393
2023-05-04 2023-03-31 13F BLACKSTONE COM 09260D107 61,594 3,994 6.93 5,410 26.61 0.0264
2023-01-26 2022-12-31 13F BLACKSTONE COM 09260D107 57,600 57,600 4,273 0.0200
2017-04-20 2017-03-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 0 -72,800 -100.00 0 -100.00
2017-02-06 2016-12-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 72,800 17,580 31.84 1,968 39.57 0.0156
2016-11-14 2016-09-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 55,220 -16,158 -22.64 1,410 -19.52 0.0101
2016-07-26 2016-06-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 71,378 3,962 5.88 1,752 -7.35 0.0123
2016-04-25 2016-03-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 67,416 -29,676 -30.56 1,891 -33.39 0.0125
2016-02-05 2015-12-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 97,092 -865,728 -89.92 2,839 -90.69 0.0180
2015-11-10 2015-09-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 962,820 -738,900 -43.42 30,493 -56.16 0.2101
2015-08-14 2015-06-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 1,701,720 -122,358 -6.71 69,549 -1.96 0.4296
2015-05-13 2015-03-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 1,824,078 -1,646,885 -47.45 70,938 -39.59 0.4447
2015-02-13 2014-12-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 3,470,963 65,603 1.93 117,423 9.54 0.7767
2014-11-14 2014-09-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 3,405,360 -91,945 -2.63 107,201 -8.34 0.7154
2014-08-14 2014-06-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 3,497,305 2,195 0.06 116,950 0.64 0.7412
2014-05-16 2014-03-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 3,495,110 -183,182 -4.98 116,212 0.30 0.7427
2014-02-14 2013-12-31 13F BLACKSTONE GROUP COMMON STOCK 09253U108 3,678,292 507,240 16.00 115,866 46.80 0.7367
2013-11-14 2013-09-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 3,171,052 71,392 2.30 78,927 20.91 0.4951
2013-08-12 2013-06-30 13F BLACKSTONE GROUP COMMON STOCK 09253U108 3,099,660 3,099,660 65,279 0.4266
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.