CB

Chubb Ltd Switz

8 super-investor ownerscombined $12.08Blargest position 4.2%

8 super-investors hold CB worth a combined $12.08B. The largest position: Warren Buffett at 4.2% of their portfolio. No cohort buying or selling was filed on the name this quarter. Cohort Conviction Score: 35 — ranked #210 of 724 scored stocks.

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Why super-investors own CB

Warren Buffett is effectively the entire story here: his $11.2B position accounts for 92% of the cohort's $12.1B combined exposure, making CB one of the more concentrated single-name bets in the tracked universe relative to its ownership breadth. Buffett holds it at 4.2% of his portfolio, with Christopher Davis ($390M) and Viking Global ($422M) as the only other owners of meaningful size. Activity in 2026Q1 was completely static — no additions, trims, new entrants, or exits across all eight holders. The owner-count history, which spiked briefly to three before collapsing back toward one, underscores that broader cohort interest has never meaningfully developed; this remains a Buffett-dominated position with modest satellite ownership and no current momentum in either direction.

AI-synthesized from 13F filings. Not investment advice.

Cohort owners over time

2016Q2 → 2026Q1

How many of the cohort members held this stock each quarter.

Now: 2

Peak: 3

Owners (8) · click any column to sort

#↑	Manager	% Port.	History	Value	Shares
1	Warren Buffett	4.2%	11q	$11.16B	34,249,183
2	Viking Global Investors	1.2%	18q	$422M	1,295,011
3	Christopher Davis	1.8%	40q	$390M	1,195,391
4	Joel Greenblatt	0.1%	38q	$83M	254,981
5	David Rolfe	3.6%	2q	$18M	53,886
6	Robert Olstein	1.4%	5q	$6M	19,000
7	Mairs & Power Funds	<0.1%	19q	$795K	2,439
8	Dodge & Cox Funds	0.0%	32q	$235K	722

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