CB

CHUBB LTD SWITZ

14 superinvestors own CB

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

Investor	Fund	Weight	Shares	Value	Quarter	Activity
Warren Buffett	Berkshire Hathaway	4.24%	34,249,183	$11.2B	2026Q1	Held
David Rolfe	Wedgewood Partners	3.63%	53,886	$17.6M	2026Q1	Reduced
Christopher Davis	Davis Selected Advisers	1.79%	1,195,391	$389.6M	2026Q1	Added
Robert Olstein	Olstein Capital Management	1.35%	19,000	$6K	2026Q1	Held
David Katz	Matrix Asset Advisors	1.23%	51,401	$6.6M	2018Q4	Reduced
Viking Global Investors	Viking Global Investors	1.18%	1,295,011	$422.1M	2026Q1	Added
John Armitage	Egerton Capital	0.43%	148,764	$42.9M	2024Q3	New
Meridian / ArrowMark	Meridian Contrarian Fund	0.16%	18,485	$6.0M	2026Q1	Reduced
Bill Nygren	Oakmark Select Fund – Harris Associates	0.04%	134,248	$26.0M	2021Q4	Held
Bill & Melinda Gates Foundation	Bill & Melinda Gates Foundation Trust	0.01%	10,250	$2.1M	2023Q3	New
Mairs & Power	Mairs & Power Growth Fund	0.01%	2,439	$795K	2026Q1	Added
Dodge & Cox	Dodge & Cox	0.00%	722	$235K	2026Q1	Held
Kenneth Fisher	Fisher Asset Management	0.00%	4,929	$1.6M	2026Q1	Added
Richard Pzena	Pzena Investment Management	0.00%	5,561	$866K	2019Q4	New

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 CB 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.