Merck & Co., Inc. (MRK) Institutional Ownership & Insider Trading

3,817 institutions reported holding Merck & Co., Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 35 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

MRKMerck & Co., Inc.Follow MRK — free

Drug Manufacturers - General · Healthcare

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Market cap: 358.4B
P/E TTM: 115.3
Dividend yield: 2.3%
52-week: —
Next earnings: 29 Oct, in 5 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

3,817 institutions held 80.3% of the shares. Across filers that reported both quarters, shares held changed +0.8%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	3,817	1982	+0.8%	1191	127	1145	79
Mar 26	3,735	1925	+0.1%	1097	219	1271	79
Dec 25	3,537	1946	-1.3%	1053	249	1128	98
Sep 25	3,230	1929	-0.2%	1046	126	1154	111
Jun 25	3,251	1954	-1.0%	1046	105	1270	212
Mar 25	3,343	1926	-0.1%	1060	98	1318	221
Dec 24	3,465	1967	-0.6%	1021	69	1284	174
Sep 24	3,377	1911	-2.8%	1133	60	1043	132

Merck & Co., Inc. — questions

Who owns Merck & Co., Inc. stock?: 3,817 institutions reported Merck & Co., Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (9.2%), VANGUARD CAPITAL MANAGEMENT LLC (6.5%), STATE STREET CORP (4.9%).
Are Merck & Co., Inc. insiders buying or selling?: 35 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Merck & Co., Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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