MRK
Merck & Co., Inc. · Healthcare · Drug Manufacturers - General
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2026
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 4 | 0 | 3.91M | $541.94M | n/a | n/a |
| Q2 2026 | 183 | 0 | 1.60B | $205.64B | +4 | −3 |
| Q1 2026 | 185 | +1 | 1.56B | $186.85B | +3 | −3 |
| Q4 2025 | 183 | 0 | 1.68B | $176.48B | +1 | n/a |
| Q3 2025 | 27 | 0 | 972.48M | $81.66B | +1 | −2 |
| Q2 2025 | 25 | 0 | 887.01M | $70.29B | +1 | −1 |
| Q1 2025 | 22 | -1 | 386.62M | $34.78B | n/a | −1 |
| Q4 2024 | 23 | -1 | 374.82M | $37.37B | n/a | −1 |
| Q3 2024 | 23 | +1 | 256.79M | $29.14B | +1 | n/a |
| Q2 2024 | 22 | n/a | 256.16M | $31.70B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wealth Enhancement Advisory… | 1.78M | +9.4% | $232.23M | 0.3% | ▲ Add | 4 | SEC ↗ |
| 2 | Assenagon Asset Management S.A. | 1.57M | -71.0% | $228.13M | 0.2% | ▼ Trim | 4 | SEC ↗ |
| 3 | TD Waterhouse Canada Inc. | 485.70K | +37.0% | $69.86M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 4 | Ninety One UK Ltd | 80.58K | -18.5% | $11.71M | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 3,742 holders, 1.88B shares, $215.80B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 10.00K sh · $1.35M
Officer · 80.31K sh · $10.72M
Officer · 11.10K sh · $1.46M
Officer · 600 sh · $79,222
Officer · 5.43K sh · $718,261
Officer · 7.41K sh · $973,165
Officer · 20.78K sh · $2.71M
Officer · 805 sh · $105,472
Officer · 4.95K sh · $643,993
Officer · 300 sh · $39,307
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology