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 September 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.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| CACTI ASSET MANAGEMENT LLC | 645.0K | 21.4% |
| ROCKLAND TRUST CO | 458.4K | 15.2% |
| FERGUSON WELLMAN CAPITAL MANAGEMENT, INC | 369.6K | 12.2% |
| CapWealth Advisors, LLC | 270.9K | 9.0% |
| EASTERN BANK | 195.9K | 6.5% |
| ARGENT CAPITAL MANAGEMENT LLC | 166.8K | 5.5% |
| BRIGHT ROCK CAPITAL MANAGEMENT, LLC | 142.0K | 4.7% |
| MassMutual Private Wealth & Trust, FSB | 140.4K | 4.6% |
| PARK NATIONAL CORP /OH/ | 120.8K | 4.0% |
| TOMPKINS FINANCIAL CORP | 92.8K | 3.1% |
| NEVILLE RODIE & SHAW INC | 86.9K | 2.9% |
| Violich Capital Management, Inc. | 48.3K | 1.6% |
| CX Institutional | 35.5K | 1.2% |
| Coastline Trust Co | 30.5K | 1.0% |
| FIRST FINANCIAL BANK - TRUST DIVISION | 25.7K | 0.9% |
| Montecito Bank & Trust | 21.3K | 0.7% |
| DOLIVER ADVISORS, LP | 15.9K | 0.5% |
| Central Pacific Bank - Trust Division | 14.2K | 0.5% |
| Heartwood Wealth Advisors LLC | 13.9K | 0.5% |
| GoalVest Advisory LLC | 13.4K | 0.4% |
| Versant Capital Management, Inc | 12.3K | 0.4% |
| Adelphi Trust Co | 11.8K | 0.4% |
| Hickory Point Bank & Trust | 9.9K | 0.3% |
| Stonebridge Financial Group, LLC | 8.9K | 0.3% |
| General Partner, Inc. | 8.7K | 0.3% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CX Institutional | Reduced | 95.3K | 35.5K | -59.8K |
| ROCKLAND TRUST CO | Reduced | 490.0K | 458.4K | -31.6K |
| MassMutual Private Wealth & Trust, FSB | Reduced | 150.8K | 140.4K | -10.4K |
| ARGENT CAPITAL MANAGEMENT LLC | Reduced | 175.7K | 166.8K | -8.9K |
| PARK NATIONAL CORP /OH/ | Reduced | 128.6K | 120.8K | -7.8K |
| FERGUSON WELLMAN CAPITAL MANAGEMENT, INC | Reduced | 376.6K | 369.6K | -7.0K |
| EASTERN BANK | Increased | 191.8K | 195.9K | +4.1K |
| Central Pacific Bank - Trust Division | Reduced | 16.9K | 14.2K | -2.7K |
| CapWealth Advisors, LLC | Reduced | 273.3K | 270.9K | -2.4K |
| Violich Capital Management, Inc. | Reduced | 50.3K | 48.3K | -2.0K |
| Ridgewood Investments LLC | Reduced | 9.4K | 8.2K | -1.2K |
| NEVILLE RODIE & SHAW INC | Reduced | 87.7K | 86.9K | -777 |
| DOLIVER ADVISORS, LP | Reduced | 16.5K | 15.9K | -661 |
| TOMPKINS FINANCIAL CORP | Reduced | 93.5K | 92.8K | -624 |
| ACIMA PRIVATE WEALTH, LLC | Reduced | 4.8K | 4.2K | -588 |
| Heartwood Wealth Advisors LLC | Increased | 13.5K | 13.9K | +457 |
| Adelphi Trust Co | Reduced | 12.3K | 11.8K | -451 |
| FIRST FINANCIAL BANK - TRUST DIVISION | Reduced | 26.1K | 25.7K | -432 |
| CACTI ASSET MANAGEMENT LLC | Reduced | 645.3K | 645.0K | -322 |
| BAKER TILLY WEALTH MANAGEMENT, LLC | Increased | 4.1K | 4.4K | +310 |
| Versant Capital Management, Inc | Increased | 12.1K | 12.3K | +185 |
| Hickory Point Bank & Trust | Reduced | 10.1K | 9.9K | -185 |
| Stonebridge Financial Group, LLC | Increased | 8.7K | 8.9K | +147 |
| Rosenberg Matthew Hamilton | Reduced | 5.7K | 5.6K | -110 |
| Coastline Trust Co | Reduced | 30.6K | 30.5K | -100 |
| Roxbury Financial LLC | Reduced | 5.9K | 5.8K | -80 |
| Miller Global Investments, LLC | Reduced | 4.3K | 4.2K | -73 |
| Montecito Bank & Trust | Increased | 21.2K | 21.3K | +61 |
| PRIVATE CLIENT SERVICES, LLC | Reduced | 2.7K | 2.7K | -44 |
| Boltwood Capital Management | Increased | 5.9K | 6.0K | +35 |
| GoalVest Advisory LLC | Increased | 13.4K | 13.4K | +20 |
| Ballew Advisors, Inc | Increased | 3.6K | 3.7K | +17 |
| Planning Strategies Inc. | Increased | 411 | 425 | +14 |
| COLLECTIVE FAMILY OFFICE LLC | Reduced | 2.8K | 2.8K | -8 |
| Olistico Wealth, LLC | Increased | 3.5K | 3.5K | +4 |
| BURKETT FINANCIAL SERVICES, LLC | Increased | 72 | 73 | +1 |
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.