6 hedge funds and family offices disclose a MRK position in their latest SEC 13F filing — combined $32.2M in market value. Of those, 2 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Prem Watsa | Fairfax Financial Holdings Ltd | 172,900 | $22.2M | 0.84% | 2026-06-30 |
| 2 | Mairs & Power | Mairs & Power Inc | 51,999 | $5.5M | 0.05% | 2025-12-31 |
| 3 | Ray Dalio | Bridgewater Associates LP | 30,254 | $3.9M | 0.02% | 2026-06-30 |
| 4 | Matrix Asset Advisors | Matrix Asset Advisors Inc/NY | 2,862 | $301K | 0.03% | 2025-12-31 |
| 5 | Thomas Russo | Gardner Russo & Quinn LLC | 1,642 | $211K | 0.00% | 2026-06-30 |
| 6 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 990 | $104K | 0.02% | 2025-12-31 |
As of the latest 13F window, 6 tracked superinvestors hold MRK. The largest disclosed position is Prem Watsa at $22.2M (0.8% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying MRK, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
6 hedge funds and family offices disclose a MRK position in their latest SEC 13F filing — combined $32.2M in market value. Of those, 2 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Prem Watsa | Fairfax Financial Holdings Ltd | 172,900 | $22.2M | 0.84% | 2026-06-30 |
| 2 | Mairs & Power | Mairs & Power Inc | 51,999 | $5.5M | 0.05% | 2025-12-31 |
| 3 | Ray Dalio | Bridgewater Associates LP | 30,254 | $3.9M | 0.02% | 2026-06-30 |
| 4 | Matrix Asset Advisors | Matrix Asset Advisors Inc/NY | 2,862 | $301K | 0.03% | 2025-12-31 |
| 5 | Thomas Russo | Gardner Russo & Quinn LLC | 1,642 | $211K | 0.00% | 2026-06-30 |
| 6 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 990 | $104K | 0.02% | 2025-12-31 |
As of the latest 13F window, 6 tracked superinvestors hold MRK. The largest disclosed position is Prem Watsa at $22.2M (0.8% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying MRK, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
