Penbrook Management LLC reports 22.64% increase in ownership of BX / Blackstone Inc.

블랙스톤 주식회사

MX ˙ BMV ˙ US09260D1072

Security	MX:BX / Blackstone Inc.
Institution	Penbrook Management LLC
Latest Disclosed Ownership	18,150 shares
Latest Disclosed Value	$ 2,087,068

On April 21, 2026 - Penbrook Management LLC filed a 13F-HR form disclosing ownership of 18,150 shares of Blackstone Inc. (MX:BX) valued at $2,087,068 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 6, 2026 disclosing 14,800 shares of Blackstone Inc.. This represents a change in shares of 22.64% 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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-04-21	2026-03-31	13F	BLACKSTONE INC COM	Stock	09260D107	18,150	3,350	22.64	2,087	-8.51	1.5804
2026-01-06	2025-12-31	13F	BLACKSTONE INC COM	Stock	09260D107	14,800	0	0.00	2,281	-9.77	1.5735
2025-10-22	2025-09-30	13F	BLACKSTONE INC COM	Stock	09260D107	14,800	-100	-0.67	2,529	13.46	1.7655
2025-07-28	2025-06-30	13F/A-1	BLACKSTONE INC COM	Stock	09260D107	14,900	-600	-3.87	2,229	2.86	1.6759
2025-07-25	2025-06-30	13F	BLACKSTONE	Stock	09260D107	15,500	0		2,167		1.6377
2025-04-01	2025-03-31	13F	BLACKSTONE	Stock	09260D107	15,500	-100	-0.64	2,167	-19.45	1.6377
2025-01-23	2024-12-31	13F	BLACKSTONE	Stock	09260D107	15,600	0	0.00	2,690	12.60	1.8348
2024-10-15	2024-09-30	13F	BLACKSTONE	Stock	09260D107	15,600	-1,000	-6.02	2,389	16.20	1.5530
2024-07-24	2024-06-30	13F	BLACKSTONE	Stock	09260D107	16,600	-923	-5.27	2,055	-10.69	1.2544
2024-04-18	2024-03-31	13F	BLACKSTONE	Stock	09260D107	17,523	0	0.00	2,302	0.31	1.4267
2024-01-16	2023-12-31	13F	BLACKSTONE	Stock	09260D107	17,523	-1,400	-7.40	2,294	13.17	1.5413
2023-10-10	2023-09-30	13F	BLACKSTONE	Stock	09260D107	18,923	-500	-2.57	2,027	12.30	1.4856
2023-07-17	2023-06-30	13F	BLACKSTONE	Stock	09260D107	19,423	0	0.00	1,806	5.80	1.3088
2023-04-20	2023-03-31	13F	BLACKSTONE	Stock	09260D107	19,423	-200	-1.02	1,706	17.25	1.3073
2023-01-24	2022-12-31	13F	BLACKSTONE	Stock	09260D107	19,623	-5,000	-20.31	1,456	-29.40	1.2408
2022-10-31	2022-09-30	13F	BLACKSTONE	Stock	09260D107	24,623	-132	-0.53	2,061	-8.72	1.7737
2022-07-29	2022-06-30	13F	BLACKSTONE	Stock	09260D107	24,755	-500	-1.98	2,258	-29.57	1.7807
2022-04-26	2022-03-31	13F	BLACKSTONE INC COM	Stock	09260D107	25,255	475	1.92	3,206	0.00	2.0798
2022-01-10	2021-12-31	13F	BLACKSTONE	Stock	09260D107	24,780	0	0.00	3,206	11.20	1.9317
2021-10-26	2021-09-30	13F	BLACKSTONE INC COM	Stock	09260D107	24,780	0	0.00	2,883	19.78	1.7916
2021-07-27	2021-06-30	13F	BLACKSTONE GROUP INC COM	COM	09260D107	24,780	0	0.00	2,407	30.32	1.4428
2021-05-06	2021-03-31	13F/A-2	BLACKSTONE GROUP	Stock	09260D107	24,780	-1,000	-3.88	1,847	10.53	1.3292
2021-05-05	2021-03-31	13F/A-1	BLACKSTONE GROUP	Stock	09260D107	24,780	0		1,847		1.3398
2021-04-16	2021-03-31	13F	BLACKSTONE GROUP INC CL A	Stock	09260D107	24,780	-2,000		1,129		1.3144
2022-04-25	2020-12-31	13F/A-1	BLACKSTONE INC COM	Stock	09260D107	25,780	0	0.00	1,671	24.15	1.2871
2021-01-27	2020-12-31	13F	BLACKSTONE GROUP INC CL A	COM	09260D107	26,780	1,000		1,736		1.2239
2020-10-23	2020-09-30	13F	BLACKSTONE GROUP INC CL A	COM	09260D107	25,780	3,180	14.07	1,346	5.07	1.1668
2020-07-28	2020-06-30	13F	BLACKSTONE GROUP	COM	09260D107	22,600	0	0.00	1,281	24.37	1.2600
2020-04-14	2020-03-31	13F	BLACKSTONE GROUP	COM	09260D107	22,600	-500	-2.16	1,030	-20.28	1.3190
2020-01-16	2019-12-31	13F	BLACKSTONE GROUP INC CL A	COM	09260D107	23,100	0	0.00	1,292	14.54	1.2589
2019-10-11	2019-09-30	13F	BLACKSTONE GROUP	COM	09260D107	23,100	-3,000	-11.49	1,128	-2.67	1.2239
2019-07-15	2019-06-30	13F	BLACKSTONE GROUP	COM	09260D107	26,100	0	0.00	1,159	26.94	1.2435
2019-04-24	2019-03-31	13F	BLACKSTONE GROUP L P	COM	09253U108	26,100	5,100	24.29	913	45.85	0.9493
2019-02-01	2018-12-31	13F	BLACKSTONE GROUP L P	COM	09253U108	21,000	0	0.00	626	-21.75	0.7144
2018-10-23	2018-09-30	13F	BLACKSTONE GROUP L P	COM	09253U108	21,000	0	0.00	800	18.34	0.7662
2018-07-30	2018-06-30	13F	BLACKSTONE GROUP L P	COM	09253U108	21,000	0	0.00	676	0.75	0.6502
2018-04-27	2018-03-31	13F	BLACKSTONE GROUP L P	COM	09253U108	21,000	0	0.00	671	-0.15	0.6709
2018-02-21	2017-12-31	13F	BLACKSTONE GROUP L P	COM	09253U108	21,000	-1,700	-7.49	672	15.86	0.6050
2016-10-27	2016-09-30	13F	BLACKSTONE GROUP L P	COM	09253U108	22,700	0	0.00	580	4.13	0.6250
2016-08-05	2016-06-30	13F	BLACKSTONE GROUP L P	COM	09253U108	22,700	200	0.89	557	-11.73	0.6141
2016-04-21	2016-03-31	13F	BLACKSTONE GROUP L P	COM	09253U108	22,500	0	0.00	631	-4.10	0.6947
2016-01-29	2015-12-31	13F	BLACKSTONE GROUP L P	COM	09253U108	22,500	1,000	4.65	658	-3.38	0.6748
2015-11-12	2015-09-30	13F	BLACKSTONE GROUP L P	COM	09253U108	21,500	0	0.00	681	-22.53	0.7211
2015-08-04	2015-06-30	13F	BLACKSTONE GROUP L P	COM UNIT	09253U108	21,500	-100	-0.46	879	4.64	0.8347
2015-04-27	2015-03-31	13F	BLACKSTONE GROUP L P	COM UNIT	09253U108	21,600	21,600	0.47	840	-4.44	0.7462
2015-01-28	2014-12-31	13F	BLACKSTONE GROUP L P	COM UNIT	09253U108	0	-21,600	-100.00	0	-100.00
2014-10-16	2014-09-30	13F	BLACKSTONE GROUP L P	COM UNIT	09253U108	21,600	0	0.00	680	-5.82	0.6270
2014-08-04	2014-06-30	13F	BLACKSTONE GROUP L P	COM	09253U108	21,600	0	0.00	722	0.56	0.6376
2014-05-07	2014-03-31	13F/A-1	BLACKSTONE GROUP L P	COM	09253U108	21,600	0	0.00	718	5.59	0.6790
2014-05-02	2014-03-31	13F	BLACKSTONE GROUP L P	COM	09253U108	21,600			680
2014-03-25	2013-12-31	13F	BLACKSTONE GROUP L P	COM	09253U108	21,600	21,600		680		0.6598

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.