1,241 institutions reported holding Aon as of 2026-03-31, totalling $60.6B. Sourced from SEC Form 13F filings, filed up to 45 days after quarter end.
#
Institution
Value
1
BlackRock, Inc.
$5.2B
2
VANGUARD CAPITAL MANAGEMENT LLC
$4.4B
3
Capital World Investors
$3.7B
4
STATE STREET CORP
$3.0B
5
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
$2.8B
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.