Quantinno Capital Management LP reports 8.27% increase in ownership of WRB / W. R. Berkley Corporation

W. R. Berkley Corporation

MX ˙ BMV ˙ US0844231029

Security	MX:WRB / W. R. Berkley Corporation
Institution	Quantinno Capital Management LP
Latest Disclosed Ownership	263,179 shares
Latest Disclosed Value	$ 17,443,535

On May 15, 2026 - Quantinno Capital Management LP filed a 13F-HR form disclosing ownership of 263,179 shares of W. R. Berkley Corporation (MX:WRB) valued at $17,443,535 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 243,072 shares of W. R. Berkley Corporation. This represents a change in shares of 8.27% 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 (%)
2026-05-15	2026-03-31	13F	BERKLEY W R	COM	084423102	263,179	20,107	8.27	17,444	2.34	0.0291
2026-02-17	2025-12-31	13F	BERKLEY W R	COM	084423102	243,072	16,624	7.34	17,044	-1.76	0.0342
2025-11-14	2025-09-30	13F	BERKLEY W R	COM	084423102	226,448	54,268	31.52	17,350	37.15	0.0473
2025-08-14	2025-06-30	13F	BERKLEY W R	COM	084423102	172,180	30,876	21.85	12,650	25.81	0.0546
2025-05-12	2025-03-31	13F	BERKLEY W R	COM	084423102	141,304	61,690	77.49	10,055	115.82	0.0655
2025-02-14	2024-12-31	13F	BERKLEY W R	COM	084423102	79,614	48,104	152.66	4,659	160.72	0.0458
2024-11-14	2024-09-30	13F	BERKLEY W R	COM	084423102	31,510	16,167	105.37	1,788	48.30	0.0232
2024-08-14	2024-06-30	13F	BERKLEY W R	COM	084423102	15,343	4,693	44.07	1,206	27.92	0.0217
2024-05-14	2024-03-31	13F	BERKLEY W R	COM	084423102	10,650	2,713	34.18	942	67.91	0.0205
2024-02-14	2023-12-31	13F	BERKLEY W R	COM	084423102	7,937	2,477	45.37	561	61.67	0.0196
2023-11-14	2023-09-30	13F	BERKLEY W R	COM	084423102	5,460	1,588	41.01	347	50.22	0.0158
2023-08-04	2023-06-30	13F	BERKLEY W R	COM	084423102	3,872	-230	-5.61	231	-9.41	0.0132
2023-05-03	2023-03-31	13F	BERKLEY W R	COM	084423102	4,102	900	28.11	255	9.91	0.0169
2023-02-13	2022-12-31	13F	BERKLEY W R	COM	084423102	3,202	3,202		232		0.0173
2022-11-07	2022-09-30	13F	BERKLEY W R	COM	084423102	0	-3,550	-100.00	0	-100.00
2022-08-15	2022-06-30	13F	BERKLEY W R	COM	084423102	3,550	3,550		242		0.0349
2020-11-16	2020-09-30	13F	BERKLEY W R	COM	084423102	0	-4,416	-100.00	0	-100.00
2020-08-14	2020-06-30	13F	BERKLEY W R	COM	084423102	4,416	4,416		253		0.2495
2019-05-14	2019-03-31	13F	W R BERKLEY	COM	084423102	0	-3,425	-100.00	0	-100.00
2019-02-14	2018-12-31	13F	W R BERKLEY	COM	084423102	3,425	3,425		253		0.2060

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.