Who holds ticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

BERKLEY W R CORP · common stock (filed as COM) · Q1 2026 · 6 members disclosed WRB ↗
13F filers reporting this class for the quarter ended 2026-03-31; 1–500 of 685 holders are listed, largest first
685
sum of the reported values across every holder; undisclosed values are left out, never counted as zero
$16.4B
holders whose share count rose or who opened the position (new + add), by shares
251
holders absent this quarter after holding last quarter — inferred from absence, not a sale record
84
FILING WINDOW OPEN
Q3 2026 filings are due by 2026-11-16 — figures for that quarter will change; missing filers are not zeros.

Holders — quarter ended 2026-03-31

by reported value · Δ shares vs 2025-12-31Holders rank by reported value. The change kind — new, add, trim or exit — is read from the share count against the prior quarter, never from the reported value.
13F holders of WRB ranked by reported value, 1–25 of 685 holders
#FilerReported valueSharesΔ sharesChange
1MITSUI SUMITOMO INSURANCE CO LTD$3.9B58,780,450+8,253,939ADD
2BlackRock, Inc.$1.5B23,280,608−1,779,881TRIM
3VANGUARD CAPITAL MANAGEMENT LLC$1.3B18,925,841—NO PRIOR
4VANGUARD PORTFOLIO MANAGEMENT LLC$978M14,750,233—NO PRIOR
5STATE STREET CORP$955M14,405,410−511,023TRIM
6MORGAN STANLEY$690M10,412,465+614,107ADD
7KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC$515M7,772,213−936,968TRIM
8Invesco Ltd.$335M5,051,765+138,428ADD
9FIRST TRUST ADVISORS LP$263M3,972,929+377,742ADD
10WELLS FARGO & COMPANY/MN$251M3,789,666−200,643TRIM
11DIMENSIONAL FUND ADVISORS LP$250M3,768,180+129,801ADD
12UBS Group AG$217M3,267,776−238,091TRIM
13BANK OF AMERICA CORP /DE/$193M2,904,522+550,560ADD
14NORTHERN TRUST CORP$179M2,705,395−182,875TRIM
15Janus Henderson Group Ltd.$163M2,457,890−1,099,917TRIM
161832 Asset Management L.P.$152M2,293,921−29,736TRIM
17ROYAL LONDON ASSET MANAGEMENT LTD$151M2,284,583−505,791TRIM
18Polar Capital Holdings Plc$151M2,275,000−170,000TRIM
19UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$144M2,175,492−44,410TRIM
20PRINCIPAL FINANCIAL GROUP INC$127M1,918,380−789,472TRIM
21CHARLES SCHWAB INVESTMENT MANAGEMENT INC$126M1,901,305+24,342ADD
22Legal & General Group Plc$124M1,871,044−189,787TRIM
23AQR CAPITAL MANAGEMENT LLC$122M1,848,105+119,064ADD
24VANGUARD FIDUCIARY TRUST CO$110M1,658,869—NO PRIOR
25CITADEL ADVISORS LLC$92.4M1,394,141+1,281,891ADD
Show the top 500 of 685 holders
Truncated by Public Filings. Top 500 of 685 holders shown; the rest are on EDGAR. Method ↗
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · WRB

Congress · last 90 days

Buyers
0 — —
Sellers
0 — —

filed 2026-07-31 → 2026-10-29 · statutory ranges

Use of congressional disclosure reports for commercial purposes, credit decisions or solicitation is restricted by 5 U.S.C. §13107(c).

Notable managers · quarter ended 2026-03-31

Adding
1 Tudor Investment Corp $28.3M held
Trimming
1 Gotham Asset Management $11.1M held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · BERKLEY W R CORP

Merged timeline of congressional filings and notable-manager moves on WRB
DateWhoChangeSize
2026-05-15Tudor Investment Corp 13FADD+351,330 sh
2026-05-15Gotham Asset Management 13FTRIM−113,999 sh

2 newest, by filing date · 13F rows are quarter-end snapshots, not trades

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.