GuruTrack
MRK

MRK

MERCK & CO. INC.

Data as of 2026 Q1 (03-31) · 13F snapshot

Summary
MERCK & CO. INC. (MRK) is held by 12 tracked hedge-fund managers, a combined reported value of ~$3.25B; the largest are Warren Buffett, Ken Griffin, Ken Griffin. This quarter: 1 added, 3 trimmed, 1 closed. 20 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Cooling
Gurus holding12
Congress trades20
Price$130.76vs quarter-end+8.70%
Sectors2
This quarter's moves
New0
Added1
Trimmed / sold4
Top holderWarren Buffett
Ken GriffinCALL—
Value $667.83M— of portfolio5,551,8002026 Q1
Ken GriffinTrim
Value $459.66M0.3% of portfolio3,821,2272026 Q1
Ken GriffinPUT—
Value $450.27M— of portfolio3,743,2002026 Q1
Dan LoebTrim
Value $212.04M3.3% of portfolio2,775,0002018 Q4
Izzy EnglanderPUT—
Value $187.24M— of portfolio1,556,6002026 Q1
Izzy EnglanderCALL—
Value $38.28M— of portfolio318,2002026 Q1
George SorosHold
Value $34.07M1.0% of portfolio300,0002024 Q3
Steven CohenCALL—
Value $19.76M— of portfolio164,3002026 Q1
Steven CohenPUT—
Value $8.26M— of portfolio68,7002026 Q1
Greenwoods Asset ManagementHold
Value $4.38M0.1% of portfolio35,3742024 Q2

Insider Trading

Officers · directors · Form 4

  • Mary Ellen Coe

    Director

    Buy$30.0K
    233Traded 2026-06-30Filed 2026-07-01

  • Surendralal Lanca Karsanbhai

    Director

    Buy$16.3K
    126Traded 2026-06-30Filed 2026-07-01

  • Christine E Seidman

    Director

    Buy$8.1K
    63Traded 2026-06-30Filed 2026-07-01

  • Inge G Thulin

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Mary Ellen Coe

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Paul Rothman

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Christine E Seidman

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Risa J Lavizzo-Mourey

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Douglas M Baker JR

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Pamela J. Craig

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Stephen Mayo

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Patricia F Russo

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Surendralal Lanca Karsanbhai

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Kathy J Warden

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • Thomas H Glocer

    Director

    Buy$220.0K
    1,853Traded 2026-05-29Filed 2026-06-02

  • David Michael Williams

    EVP,Chief Info&Digital Officer

    Buy
    4,640Traded 2026-05-05Filed 2026-05-07

  • Richard R. Deluca

    EVP&Pres, Merck Animal Heallth

    Buy
    34,924 @ $113.15Traded 2026-05-05Filed 2026-05-07

  • Jennifer Zachary

    EVP, General Counsel

    Buy
    35,312 @ $113.15Traded 2026-05-05Filed 2026-05-07

  • Betty D Larson

    EVP, Chief HR Officer

    Buy
    23,283 @ $113.15Traded 2026-05-05Filed 2026-05-07

  • Betty D Larson

    EVP, Chief HR Officer

    Buy
    7,954Traded 2026-05-05Filed 2026-05-07

  • Dean Y Li

    Executive VP & President, MRL

    Buy
    58,207 @ $113.15Traded 2026-05-05Filed 2026-05-07

  • Richard R. Deluca

    EVP&Pres, Merck Animal Heallth

    Buy
    11,931Traded 2026-05-05Filed 2026-05-07

  • Dean Y Li

    Executive VP & President, MRL

    Buy
    19,885Traded 2026-05-05Filed 2026-05-07

  • Caroline Litchfield

    EVP & CFO

    Buy
    46,566 @ $113.15Traded 2026-05-05Filed 2026-05-07

Insider transactions are public SEC Form 4 disclosures (company officers, directors, 10% owners), for research only — not investment advice.

Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.