← Super investors
MRK
Merck & Co. Inc.
11 super-investor ownerscombined $2.13Blargest position 4.8%
1 NEW1 TRIM
Cohort owners over time
2016Q2 → 2026Q1How many of the cohort members held this stock each quarter.
Now: 4
Peak: 5
Owners (11) · click any column to sort
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | Bill Nygren | 2.0% | 7q | $1.49B | 12,366,933 |
| 2 | Joel Greenblatt | 0.3% | 38q | $460M | 3,821,227 |
| 3 | Sarah Ketterer | 1.3% | 12q | $103M | 854,212 |
| 4 | Kahn Brothers Group | 4.8% | 17q | $27M | 227,288 |
| 5 | Prem Watsa | 1.1% | 22q | $21M | 172,900 |
| 6 | Dodge & Cox Funds | <0.1% | 40q | $16M | 136,050 |
| 7 | Mairs & Power Funds | 0.1% | 40q | $6M | 50,348 |
| 8 | Christopher Bloomstran | 0.6% | 40q | $5M | 44,633 |
| 9 | Richard Pzena | <0.1% | 28q | $302K | 2,511 |
| 10 | Thomas Russo | <0.1% | 28q | $258K | 2,141 |
| 11 | David Katz | <0.1% | 40q | $201K | 1,671 |
Sort↑
- 1Bill Nygren2.0%$1.49B12,366,933 sh·7q held
- 2Joel Greenblatt0.3%$460M3,821,227 sh·38q held
- 3Sarah Ketterer1.3%$103M854,212 sh·12q held
- 4Kahn Brothers Group4.8%$27M227,288 sh·17q held
- 5Prem Watsa1.1%$21M172,900 sh·22q held
- 6Dodge & Cox Funds<0.1%$16M136,050 sh·40q held
- 7Mairs & Power Funds0.1%$6M50,348 sh·40q held
- 8Christopher Bloomstran0.6%$5M44,633 sh·40q held
- 9Richard Pzena<0.1%$302K2,511 sh·28q held
- 10Thomas Russo<0.1%$258K2,141 sh·28q held
- 11David Katz<0.1%$201K1,671 sh·40q held
Recent activity (2)
| Manager | Move | % Port. | Δ Shares | Value | Filed |
|---|---|---|---|---|---|
| Thomas Russo | NEW | <0.1% | +100% | $258K | May 13, 2026 |
| Kahn Brothers Group | TRIM | 4.8% | -47% | $27M | May 8, 2026 |
Long US equity 13F-HR filings only. CUSIP 58933Y105. Not investment advice.