Advisor Group Holdings, Inc. reports 21.99% decrease in ownership of WRB / W. R. Berkley Corporation

W. R. Berkley Corporation

US ˙ NYSE ˙ US0844231029

Security	WRB / W. R. Berkley Corporation
Institution	Advisor Group Holdings, Inc.
Latest Disclosed Ownership	83,068 shares
Latest Disclosed Value	$ 5,508,149

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 83,068 shares of W. R. Berkley Corporation (US:WRB) valued at $5,505,747 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 106,477 shares of W. R. Berkley Corporation. This represents a change in shares of -21.99% during the quarter. The current value of the position is $5,423,510 USD.

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 (%)
2026-05-15	2026-03-31	13F	BERKLEY W R	COM	084423102	83,068	-23,409	-21.99	5,508	-26.25	0.0047
2026-02-17	2025-12-31	13F	BERKLEY W R	COM	084423102	106,477	-1,621	-1.50	7,469	-7.34	0.0109
2025-11-14	2025-09-30	13F	BERKLEY W R	COM	084423102	108,098	56,366	108.96	8,061	111.99	0.0113
2025-09-04	2025-06-30	13F/A-1	ERKLEY W R	COM	084423102	51,732	10,073	24.18	3,803	28.23	0.0068
2025-08-13	2025-06-30	13F	ERKLEY W R	COM	084423102	40,274	-1,385		2,449		0.0028
2025-05-12	2025-03-31	13F	BERKLEY W R	COM	084423102	41,659	-9,294	-18.24	2,965	-0.54	0.0066
2025-06-06	2024-12-31	13F/A-1	BERKLEY W R	COM	084423102	50,953	17,837	53.86	2,982	58.73	0.0067
2025-02-07	2024-12-31	13F	BERKLEY W R	COM	084423102	26,882	-6,234		1,555		0.0040
2024-11-13	2024-09-30	13F	BERKLEY W R	COM	084423102	33,116	9,205	38.50	1,879	-0.05	0.0042
2024-08-13	2024-06-30	13F	BERKLEY W R	COM	084423102	23,911	-1,525	-6.00	1,879	-16.49	0.0044
2024-05-10	2024-03-31	13F	BERKLEY W R	COM	084423102	25,436	-54,637	-68.23	2,251	-60.29	0.0050
2024-02-12	2023-12-31	13F	BERKLEY W R	COM	084423102	80,073	-41,027	-33.88	5,667	-26.33	0.0099
2023-11-13	2023-09-30	13F	BERKLEY W R	COM	084423102	121,100	25,671	26.90	7,691	35.29	0.0114
2023-08-21	2023-06-30	13F/A-1	BERKLEY W R	COM	084423102	95,429	-21,132	-18.13	5,686	-21.75	0.0102
2023-08-10	2023-06-30	13F	BERKLEY W R	COM	084423102	95,429	-21,132		5,686		0.0015
2023-05-12	2023-03-31	13F	BERKLEY W R	COM	084423102	116,561	-79,072	-40.42	7,265	-48.83	0.0137
2023-02-10	2022-12-31	13F	BERKLEY W R	COM	084423102	195,633	7,381	3.92	14,199	16.78	0.0288
2022-11-14	2022-09-30	13F	BERKLEY W R	COM	084423102	188,252	29,600	18.66	12,159	12.19	0.0278
2022-08-10	2022-06-30	13F	BERKLEY W R	COM	084423102	158,652	57,064	56.17	10,838	65.92	0.0239
2022-05-04	2022-03-31	13F	BERKLEY W R	COM	084423102	101,588	48,916	92.87	6,532	50.51	0.0127
2022-02-03	2021-12-31	13F	BERKLEY W R	COM	084423102	52,672	8,243	18.55	4,340	33.37	0.0082
2021-11-05	2021-09-30	13F	BERKLEY W R	COM	084423102	44,429	3,033	7.33	3,254	5.51	0.0068
2021-08-02	2021-06-30	13F	BERKLEY W R	COM	084423102	41,396	2,152	5.48	3,084	4.15	0.0067
2021-05-13	2021-03-31	13F	BERKLEY W R	COM	084423102	39,244	3,517	9.84	2,961	24.78	0.0071
2021-02-10	2020-12-31	13F	BERKLEY W R	COM	084423102	35,727	6,930	24.07	2,373	35.52	0.0063
2020-11-12	2020-09-30	13F	BERKLEY W R	COM	084423102	28,797	1,208	4.38	1,751	10.75	0.0052
2020-08-14	2020-06-30	13F	BERKLEY W R	COM	084423102	27,589	5,729	26.21	1,581	36.06	0.0053
2020-05-18	2020-03-31	13F	BERKLEY W R	COM	084423102	21,860	21,860		1,162		0.0048

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.