Which superinvestors hold Merck & Co Inc (MRK)?

Per the latest SEC 13F filings, 4 superinvestors hold Merck & Co Inc (MRK): Bill Nygren, Prem Watsa, Dodge & Cox, Chris Bloomstran. Combined value held is about $1.53B, with Bill Nygren the largest holder.

Merck & Co Inc

Held by 4 superinvestors (MRK). Valuation data coming soon.

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

TickerMRK

Holder count4

Total value held$1.53B

Largest holderBill Nygren

External

Ownership overview

Merck & Co Inc (MRK) is held by 4 of the superinvestors tracked on Compounder, with a combined $1.53B in reported 13F value. The largest position belongs to Bill Nygren, where it makes up 2.0% of the portfolio.

Other notable holders by value include Prem Watsa (1.1% of its book), Dodge & Cox (0.0% of its book) and Chris Bloomstran (0.6% of its book).

Over the latest quarter, 0 of the tracked filers opened a new position in MRK, 1 added to existing ones, 2 trimmed, and 0 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.

Superinvestors Holding This Security

Investor	Value	Shares	Weight
Bill Nygren	$1.49B	12,366,933	1.98%
Prem Watsa	$20.8M	172,900	1.07%
Dodge & Cox	$16.4M	136,050	0.01%
Chris Bloomstran	$5.4M	44,633	0.64%

Bill Nygren
Value$1.49BShares12,366,933Weight1.98%
Prem Watsa
Value$20.8MShares172,900Weight1.07%
Dodge & Cox
Value$16.4MShares136,050Weight0.01%
Chris Bloomstran
Value$5.4MShares44,633Weight0.64%

Stock valuation (intrinsic value / DCF) coming soon.

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

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