Canonical: https://ownershiptrace.com/13f/companies/750 # Who owns Merck & Co., Inc. (MR)? Elite investor 13F holders 17 tracked elite investors reported holding Merck & Co., Inc as of 2026-06-30, including Oakmark Funds, GMO, Aristotle Capital Management, D.E. Shaw, Causeway Capital Management. Who bought, trimmed or exited each quarter, with links to the original SEC 13F filings. 17 tracked investors currently reported holding · Latest report period: 2026-06-30 · Health Care · Pharmaceuticals, Biotechnology & Life Sciences Merck & Co., Inc. operates as a healthcare company worldwide. It offers human health pharmaceutical for various areas under the Keytruda, Keytruda Qlex, Welireg, Gardasil, ProQuad, M-M-R II, Varivax, Vaxneuvance, Capvaxive, RotaTeq, Pneumovax 23, Bridion, Prevymis, Dificid, Zerbaxa, Winrevair, Adempas/ Verquvo, Ohtuvayre, Lagevrio, Isentress/Isentress HD, Delstrigo, Pifeltro, Belsomra, Januvia,… ## Reported holders and securities, including exits (up to 20) | Investor | Security | Instrument | Report period | Filed | Value | Quantity | Units | Change | Source | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | [Oakmark Funds](https://ownershiptrace.com/13f/investors/11) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 1551394499.00 USD | 12073109.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/813917/0000813917-26-000042-index.html) | | [GMO](https://ownershiptrace.com/13f/investors/94674) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 871873732.00 USD | 6785008.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1352662/0001072613-26-000636-index.html) | | [Aristotle Capital Management](https://ownershiptrace.com/13f/investors/94673) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 845353780.00 USD | 6578570.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/860644/0001398344-26-014479-index.html) | | [D.E. Shaw](https://ownershiptrace.com/13f/investors/98) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 351835956.00 USD | 2738023.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1009207/0001104659-26-097217-index.html) | | [Causeway Capital Management](https://ownershiptrace.com/13f/investors/69) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 122708787.00 USD | 954932.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1165797/0000945621-26-001052-index.html) | | [Gotham Asset Management](https://ownershiptrace.com/13f/investors/94672) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 67968405.00 USD | 528937.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1510387/0001398344-26-014644-index.html) | | [Kahn Brothers Group](https://ownershiptrace.com/13f/investors/49) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-17 00:00:00 | 28036427.00 USD | 218182.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1039565/0001039565-26-000006-index.html) | | [Fairfax Financial Holdings](https://ownershiptrace.com/13f/investors/62) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 22198631.00 USD | 172900.000000 | Shares | hold | [Original filing](https://www.sec.gov/Archives/edgar/data/915191/0001104659-26-096276-index.html) | | [Dodge & Cox Funds](https://ownershiptrace.com/13f/investors/29) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 17443875.00 USD | 135750.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/200217/0001193125-26-349535-index.html) | | [GAMCO](https://ownershiptrace.com/13f/investors/137) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-12 00:00:00 | 8053352.00 USD | 62672.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/807249/0001140361-26-032508-index.html) | | [Mairs & Power Funds](https://ownershiptrace.com/13f/investors/54) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 6620192.00 USD | 51519.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1070134/0001172661-26-003496-index.html) | | [Semper Augustus](https://ownershiptrace.com/13f/investors/17) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 5735341.00 USD | 44633.000000 | Shares | hold | [Original filing](https://www.sec.gov/Archives/edgar/data/1115373/0001941040-26-000625-index.html) | | [Bridgewater Associates](https://ownershiptrace.com/13f/investors/8) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 3887639.00 USD | 30254.000000 | Shares | buy | [Original filing](https://www.sec.gov/Archives/edgar/data/1350694/0001350694-26-000003-index.html) | | [Ancora Advisors / Ancora Holdings](https://ownershiptrace.com/13f/investors/101) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 2685957.00 USD | 20902.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1446114/0001446114-26-000012-index.html) | | [Pzena Investment Management](https://ownershiptrace.com/13f/investors/64) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-07 00:00:00 | 322664.00 USD | 2511.000000 | Shares | hold | [Original filing](https://www.sec.gov/Archives/edgar/data/1027796/0001027796-26-000049-index.html) | | [Gardner Russo & Quinn](https://ownershiptrace.com/13f/investors/75) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 211006.00 USD | 1642.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/860643/0000860643-26-000005-index.html) | | [Matrix Asset Advisors](https://ownershiptrace.com/13f/investors/25) | MERCK & CO. INC | SHARE | 2026-06-30 | 2026-07-15 00:00:00 | 214724.00 USD | 1671.000000 | Shares | hold | [Original filing](https://www.sec.gov/Archives/edgar/data/1016287/0001172661-26-002637-index.html) | Public disclosures can be delayed, incomplete, or amended. Report period describes a position date; transaction date describes a reported transaction; filed describes submission. A recent filing or page update does not establish a current holding. A dash means unavailable or not comparable, not zero. This public summary shows the default reporting scope. Enable JavaScript for interactive filters, charts, and additional rows. [How to read the data](https://ownershiptrace.com/docs#reading-the-data) · [Disclaimer](https://ownershiptrace.com/disclaimer)