917 institutions reported holding W.R. Berkley as of 2026-03-31, totalling $18.5B. Sourced from SEC Form 13F filings, filed up to 45 days after quarter end.
#
Institution
Value
1
Mitsui Sumitomo Insurance Co Ltd
$3.9B
2
BlackRock, Inc.
$1.5B
3
VANGUARD CAPITAL MANAGEMENT LLC
$1.3B
4
VANGUARD PORTFOLIO MANAGEMENT LLC
$978M
5
STATE STREET CORP
$955M
Source: SEC Form 13F filings via SEC EDGAR. Covers long US-listed equity only — short positions, bonds and non-US holdings are not reported on this form.