MRK Merck & Co., Inc.
Merck & Co., Inc. (MRK) Institutional Ownership
What the institutions did with MRK last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 227.0M | 11.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 161.3M | 8.2% |
| STATE STREET CORP | 120.4M | 6.1% |
| WELLINGTON MANAGEMENT GROUP LLP | 86.2M | 4.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 67.7M | 3.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 60.7M | 3.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 54.4M | 2.7% |
| MORGAN STANLEY | 48.6M | 2.5% |
| FMR LLC | 45.4M | 2.3% |
| JPMORGAN CHASE & CO | 43.9M | 2.2% |
| Fisher Asset Management, LLC | 38.5M | 1.9% |
| NORGES BANK | 37.0M | 1.9% |
| BANK OF AMERICA CORP /DE/ | 30.5M | 1.5% |
| NORTHERN TRUST CORP | 26.3M | 1.3% |
| GOLDMAN SACHS GROUP INC | 22.1M | 1.1% |
| FRANKLIN RESOURCES INC | 19.5M | 1.0% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 19.5M | 1.0% |
| Legal & General Group Plc | 18.9M | 1.0% |
| Invesco Ltd. | 18.6M | 0.9% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 18.5M | 0.9% |
| Bank of New York Mellon Corp | 18.3M | 0.9% |
| DIMENSIONAL FUND ADVISORS LP | 17.5M | 0.9% |
| AMERIPRISE FINANCIAL INC | 17.4M | 0.9% |
| Capital International Investors | 15.4M | 0.8% |
| ROYAL BANK OF CANADA | 14.3M | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Capital International Investors | Increased | 870.3K | 15.4M | +14.5M |
| Fisher Asset Management, LLC | Increased | 26.4M | 38.5M | +12.1M |
| JPMORGAN CHASE & CO | Reduced | 53.0M | 43.9M | -9.1M |
| NORDEA INVESTMENT MANAGEMENT AB | Reduced | 8.5M | 3.5M | -5.0M |
| Assenagon Asset Management S.A. | Increased | 743.2K | 5.4M | +4.7M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 49.8M | 54.4M | +4.6M |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 23.0M | 18.5M | -4.5M |
| JENNISON ASSOCIATES LLC | Reduced | 6.2M | 2.7M | -3.5M |
| FRANKLIN RESOURCES INC | Increased | 16.3M | 19.5M | +3.3M |
| Invesco Ltd. | Reduced | 21.9M | 18.6M | -3.2M |
| MARSHALL WACE, LLP | Sold Out | 2.8M | 0 | -2.8M |
| DIAMANT ASSET MANAGEMENT, INC. | Reduced | 2.1M | 16.4K | -2.1M |
| DIMENSIONAL FUND ADVISORS LP | Increased | 15.5M | 17.5M | +2.0M |
| California Public Employees Retirement System | Reduced | 7.4M | 5.4M | -2.0M |
| GOLDMAN SACHS GROUP INC | Increased | 20.1M | 22.1M | +1.9M |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 84.3M | 86.2M | +1.9M |
| CITADEL ADVISORS LLC | Reduced | 3.8M | 1.9M | -1.9M |
| FIRST TRUST ADVISORS LP | Reduced | 4.5M | 2.6M | -1.9M |
| ALLIANCEBERNSTEIN L.P. | Increased | 11.3M | 13.1M | +1.8M |
| Balyasny Asset Management L.P. | Reduced | 1.8M | 56.0K | -1.8M |
| Amundi | Reduced | 13.8M | 12.3M | -1.4M |
| LAZARD ASSET MANAGEMENT LLC | Reduced | 3.3M | 1.8M | -1.4M |
| MILLENNIUM MANAGEMENT LLC | Reduced | 2.0M | 561.3K | -1.4M |
| SG Americas Securities, LLC | Increased | 1.7M | 3.1M | +1.4M |
| Employees Provident Fund Board | Reduced | 1.9M | 535.5K | -1.4M |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.