Which superinvestors hold Aon Plc-Class A (AON)?

Per the latest SEC 13F filings, 11 superinvestors hold Aon Plc-Class A (AON): Dodge & Cox, Polen Capital, William von Mueffling, Andreas Halvorsen, Seth Klarman, Steven Romick, Wallace Weitz, Thomas Gayner, Ray Dalio, Donald Yacktman, David Katz. Combined value held is about $4.36B, with Dodge & Cox the largest holder.

Aon Plc-Class A

Held by 11 superinvestors (AON).

Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.

Ownership · 13F consensus

Who's buying it

Institutional ownership aggregated across funds — consensus strength and this quarter's moves. Describes actions, not advice.

11 superinvestors hold it · $4.36B combined

This quarter1 opened5 added3 trimmed2 exited

Largest holder Dodge & Cox

13F positions are self-reported and can lag up to 45 days. Informational only — not investment advice.

Superinvestors Holding This Security

Investor	Value	Shares	Weight (prev→now)
Dodge & Cox	$2.62B	8,116,095	1.5% → 1.4% ▲
Polen Capital	$437.1M	1,354,053	2.8% → 3.0% ▼
William von Mueffling	$353.6M	1,095,574	2.4% → 2.3% ▼
Andreas Halvorsen	$350.9M	1,087,114	0.7% → 1.0% ▲
Seth Klarman	$248.2M	769,000	New · 4.9%
Steven Romick	$227.0M	703,258	3.0% → 3.2% ▲
Wallace Weitz	$69.0M	213,860	4.6% → 4.8% ▼
Thomas Gayner	$43.8M	135,800	0.4% → 0.4% ▲
Ray Dalio	$6.5M	20,219	0.0% → 0.0% ▲
Donald Yacktman	$4.2M	12,915	0.1% → 0.1%

Dodge & Cox
Value$2.62BWeight (prev→now)1.5% → 1.4% ▲
Polen Capital
Value$437.1MWeight (prev→now)2.8% → 3.0% ▼
William von Mueffling
Value$353.6MWeight (prev→now)2.4% → 2.3% ▼
Andreas Halvorsen
Value$350.9MWeight (prev→now)0.7% → 1.0% ▲
Seth Klarman
Value$248.2MWeight (prev→now)New · 4.9%
Steven Romick
Value$227.0MWeight (prev→now)3.0% → 3.2% ▲
Wallace Weitz
Value$69.0MWeight (prev→now)4.6% → 4.8% ▼
Thomas Gayner
Value$43.8MWeight (prev→now)0.4% → 0.4% ▲
Ray Dalio
Value$6.5MWeight (prev→now)0.0% → 0.0% ▲
Donald Yacktman
Value$4.2MWeight (prev→now)0.1% → 0.1%

Show all 11 holders ▸

Investor	Value	Shares	Weight (prev→now)
David Katz	$209,161	648	0.0% → 0.0%

David Katz
Value$209,161Weight (prev→now)0.0% → 0.0%

Exited this quarter (2)

Bill Nygren Warren Buffett

Ownership overview

Aon Plc-Class A (AON) is held by 11 of the superinvestors tracked on Compounder, with a combined $4.36B in reported 13F value. The largest position belongs to Dodge & Cox, where it makes up 1.4% of the portfolio.

Other notable holders by value include Polen Capital (3.0% of its book), William von Mueffling (2.3% of its book) and Andreas Halvorsen (1.0% of its book).

Over the latest quarter, 1 of the tracked filers opened a new position in AON, 5 added to existing ones, 3 trimmed, and 2 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.

Holders over time

Superinvestors holding this security over the last 8 quarters: 9 → 11.

Early quarters may understate holder counts due to data backfill — read the slope with care.

Key facts & links

Ticker: AON
Total value held: $4.36B
Largest holder: Dodge & Cox
External

Sources· SEC EDGAR 13F as of 2026-05-15

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