Warren Buffett - Berkshire Hathaway
Holding/activity history for Merck & Co. (MRK)
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Reported Price |
| 2021 Q3 | 0 | 0 | Sell 100.00% | 0.24 | |
| 2021 Q2 | 9,157,192 | 0.24 | Reduce 48.79% | 0.23 | $77.77 |
| 2021 Q1 | 17,882,388 | 0.51 | Reduce 37.69% | 0.31 | $77.09 |
| 2020 Q4 | 28,697,435 | 0.87 | Add 28.10% | 0.19 | $81.80 |
| 2020 Q3 | 22,403,102 | 0.79 | Buy | 0.79 | $82.95 |