AON

AON PLC

11 superinvestors own AON

Based on latest 13F filings — data is 45–90 days delayed

Investor	Fund	Weight	Shares	Value	Quarter	Activity
Wallace Weitz	Weitz Investment Management	4.58%	218,735	$77.2M	2025Q4	New
Polen Capital Management	Polen Capital Management	2.78%	1,846,294	$651.5M	2025Q4	Reduced
William Von Mueffling	Cantillon Capital Management	2.37%	1,243,018	$438.6M	2025Q4	Added
Dodge & Cox	Dodge & Cox	1.50%	7,852,456	$2.8B	2025Q4	Added
Viking Global Investors	Viking Global Investors	0.73%	783,650	$276.5M	2025Q4	Reduced
Warren Buffett	Berkshire Hathaway	0.46%	3,602,995	$1.3B	2025Q4	Reduced
Yacktman Asset Management	Yacktman Asset Management	0.06%	12,915	$4.6M	2025Q4	New
Jensen Investment Management	Jensen Investment Management	0.06%	10,603	$3.7M	2025Q4	Added
David Katz	Matrix Asset Advisors	0.02%	648	$229K	2025Q4	Held
Kenneth Fisher	Fisher Asset Management	0.00%	635	$224K	2025Q4	Added
Bill Nygren	Oakmark Select Fund – Harris Associates	0.00%	699	$247K	2025Q4	Reduced

Open-market purchases (P) and sales (S) from SEC Form 4 filings · last 12 months

No open-market insider trades in the last 12 months.

Form 4 filings for option exercises and other transaction types are excluded.

STOCK Act disclosures · last 12 months

Congressional trade data coming soon.

We are sourcing STOCK Act disclosures and will display them here shortly.

What Is SEC Form 4?

Understand the insider trade filings behind AON activity.

What Is a 13F Filing?

How superinvestors disclose their quarterly holdings.

Insider Cluster Buying

Why multiple insiders buying together is a strong signal.

Superinvestor Consensus

The most widely held stocks across all tracked institutions.