← Top Holdings

MRKMERCK & CO INC

CUSIP: 58933Y105

Healthcare

14

Guru Owners

$1.78B

Total Value Held

13.8M

Total Shares

Who owns MRK? Full holder list and ownership history →

📊 Holdings Over Time

How superinvestor ownership has changed across quarters

$0$444.3M$888.6M$1.33B$1.78BQ2 '23Q4 '23Q2 '24Q4 '24Q2 '25Q4 '25Q2 '26

Quarter-by-Quarter Activity

Q2 '2614 owners · $1.78B
REDUCEDBill Nygren$1.55B
INCREASEDSarah Ketterer$122.7M
REDUCEDKahn Brothers$28.0M
REDUCEDDodge & Cox$17.4M
REDUCEDFPA Queens Road$16.2M
INCREASEDMairs & Power$6.6M
NEWRay Dalio$3.9M
REDUCEDWally Obermeyer$1.1M
REDUCEDTom Russo$211K
Q1 '2613 owners · $1.69B
REDUCEDBill Nygren$1.49B
INCREASEDSarah Ketterer$102.8M
REDUCEDKahn Brothers$27.3M
REDUCEDDodge & Cox$16.4M
REDUCEDFPA Queens Road$16.0M
REDUCEDMairs & Power$6.1M
REDUCEDWally Obermeyer$1.0M
REDUCEDRichard Pzena$302K
NEWTom Russo$258K
REDUCEDDavid Katz$201K
Q4 '2513 owners · $1.73B
REDUCEDBill Nygren$1.48B
REDUCEDSarah Ketterer$110.0M
REDUCEDKahn Brothers$45.3M
REDUCEDRay Dalio$32.7M
REDUCEDFPA Queens Road$15.4M
REDUCEDDodge & Cox$14.5M
REDUCEDMairs & Power$5.5M
REDUCEDWally Obermeyer$912K
REDUCEDDavid Katz$301K
Q3 '2513 owners · $1.05B
INCREASEDBill Nygren$824.5M
REDUCEDSarah Ketterer$95.2M
INCREASEDRay Dalio$43.1M
REDUCEDKahn Brothers$36.4M
REDUCEDDodge & Cox$12.9M
INCREASEDFPA Queens Road$12.4M
REDUCEDMairs & Power$4.4M
REDUCEDWally Obermeyer$741K
REDUCEDDavid Katz$241K
Q2 '2513 owners · $978.3M
INCREASEDBill Nygren$722.8M
REDUCEDRay Dalio$91.1M
INCREASEDSarah Ketterer$77.8M
REDUCEDKahn Brothers$38.8M
INCREASEDDodge & Cox$12.5M
INCREASEDFPA Queens Road$11.6M
INCREASEDMairs & Power$4.5M
INCREASEDWally Obermeyer$783K
REDUCEDDavid Katz$231K
Q1 '2513 owners · $910.1M
INCREASEDBill Nygren$670.4M
INCREASEDRay Dalio$48.0M
REDUCEDKahn Brothers$44.2M
REDUCEDWally Obermeyer$14.5M
REDUCEDDodge & Cox$14.1M
INCREASEDFPA Queens Road$12.7M
REDUCEDMairs & Power$4.8M
INCREASEDDavid Katz$264K
REDUCEDTom Russo$248K

🏛️ Congressional Trades

MRK: Held by 14 superinvestors · 50 congress member trades

$1,001 - $15,0002026-02-04
$15,001 - $50,0002026-01-13
$1,001 - $15,0002025-12-19
$1,001 - $15,0002025-12-19
$1,001 - $15,0002025-12-18
$1,001 - $15,0002025-11-18
$1,001 - $15,0002025-11-18
$1,001 - $15,0002025-11-13
$15,001 - $50,0002025-10-27
$1,001 - $15,0002025-09-23
$1,001 - $15,0002025-08-28
$50,001 - $100,0002025-08-22
$1,001 - $15,0002025-08-14
$1,001 - $15,0002025-08-14
$1,001 - $15,0002025-08-05
$1,001 - $15,0002025-08-05
$1,001 - $15,0002025-08-04
$1,001 - $15,0002025-08-04
$1,001 - $15,0002025-07-11
$1,001 - $15,0002025-07-11