MRK: Merck & Co Inc insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Institutional ownership (Q2 2026)
3,858 institutions reported holding $246.22B of Merck & Co Inc on Form 13F (3,809 the quarter before). 161 opened a new position and 118 sold out. Shares held by institutions: +3%.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 226,999,837 | $29.17B |
| VANGUARD CAPITAL MANAGEMENT LLC | 161,323,174 | $20.73B |
| STATE STREET CORP | 120,413,256 | $15.57B |
| WELLINGTON MANAGEMENT GROUP LLP | 86,249,283 | $11.08B |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 67,738,969 | $8.70B |
| GEODE CAPITAL MANAGEMENT, LLC | 60,744,214 | $7.79B |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 54,365,289 | $6.99B |
| MORGAN STANLEY | 48,641,158 | $6.25B |
| FMR LLC | 45,440,355 | $5.84B |
| JPMORGAN CHASE & CO | 43,886,420 | $5.68B |
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