Merck & Co., Inc. (MRK) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for MRK. 13F holdings as of 2026-06-30.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|
| Vanguard | 255,739,722 | $32.9B | INCREASED |
| BlackRock | 226,999,837 | $29.2B | INCREASED |
| State Street | 120,413,256 | $15.6B | INCREASED |
| Wellington Management | 86,249,283 | $11.1B | INCREASED |
| Geode Capital Management | 60,744,214 | $7.8B | INCREASED |
Recent Insider Trades
| Insider | Type | Shares | Value | Date |
|---|
| Chirfi Guindo (EVP, Access, Policy & Comms) | SELL | 10,000 | $1M | 2026-08-13 |
| Jennifer Zachary (EVP, General Counsel) | EXERCISE | 13,433 | $1M | 2026-08-12 |
| Jennifer Zachary (EVP, General Counsel) | EXERCISE | 41,494 | $5M | 2026-08-12 |
| Jennifer Zachary (EVP, General Counsel) | SELL | 80,315 | $11M | 2026-08-12 |
| Richard R. Deluca (EVP&Pres, Merck Animal Heallth) | SELL | 600 | $79K | 2026-08-10 |
Recent Congressional Trades
| Member | Type | Amount | Date |
|---|
| Maria Elvira Salazar (Republican) | PURCHASE | $15,001 - $50,000 | 2026-08-19 |
| Ro Khanna (Democrat) | PURCHASE | $15,001 - $50,000 | 2026-08-07 |
| Keith Self (Republican) | SALE | $1,001 - $15,000 | 2025-01-10 |
Full institutional holdings, insider history, and congressional trades for Merck & Co., Inc. on SentiSense.