Merck & Co., Inc. (MRK) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for MRK. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 3,762 institutions reported holding MRK, with 2.0 billion shares worth $251.3 billion in aggregate.
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 |
|---|---|---|---|---|
| Christine E Seidman (Director) | AWARD | 55 | $8K | 2026-09-30 |
| Surendralal Lanca Karsanbhai (Director) | AWARD | 111 | $16K | 2026-09-30 |
| Mary Ellen Coe (Director) | AWARD | 206 | $30K | 2026-09-30 |
| 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 |
Recent Congressional Trades
| Member | Type | Amount | Date |
|---|---|---|---|
| Michael T. McCaul (Republican) | SALE | $50,001 - $100,000 | 2026-08-28 |
| Ro Khanna (Democrat) | SALE | $1,001 - $15,000 | 2026-09-04 |
| Maria Elvira Salazar (Republican) | SALE | $1,001 - $15,000 | 2026-09-24 |
Full institutional holdings, insider history, and congressional trades for Merck & Co., Inc. on SentiSense.