Marshall Wace, LLP’s Merck & Co Inc Position
Does Marshall Wace, LLP own Merck & Co Inc (MRK)? Yes — 2.78M shares worth $334M (+0.33% of its 13F portfolio) as of Q1 2026, down from 3.97M shares the prior filed quarter.
Position Value
$334M
Q1 2026
Shares
2.78M
% of Portfolio
+0.33%
Quarters Held
27
currently held
Position History MRK
Reported value by quarter
| Quarter | Shares | Value | % of Portfolio |
|---|---|---|---|
| Q1 2026 | 2.78M | $334M | +0.33% |
| Q4 2025 | 3.97M | $418M | +0.38% |
| Q3 2025 | 883.9K | $74M | +0.08% |
| Q2 2025 | 3.14M | $249M | +0.28% |
| Q1 2025 | 7.6K | $682,804 | 0.00% |
| Q4 2024 | 331 | $32,927 | 0.00% |
| Q3 2024 | 3.4K | $381,561 | 0.00% |
| Q2 2024 | 2.58M | $320M | +0.43% |
| Q1 2024 | 1.95M | $257M | +0.39% |
| Q4 2023 | 3.99M | $435M | +0.74% |
| Q3 2023 | 2.05M | $211M | +0.43% |
| Q2 2023 | 176.1K | $20M | +0.04% |
| Q4 2022 | 1.03M | $115M | +0.26% |
| Q3 2022 | 661.3K | $57M | +0.12% |
| Q2 2022 | 5.80M | $529M | +1.09% |
| Q1 2022 | 6.79M | $557M | +1.05% |
| Q4 2021 | 39.1K | $3M | +0.01% |
| Q3 2021 | 2.5K | $189,000 | 0.00% |
| Q4 2020 | 54.1K | $4M | +0.02% |
| Q3 2020 | 261.0K | $22M | +0.14% |
| Q2 2020 | 163.6K | $13M | +0.09% |
| Q1 2020 | 321.8K | $25M | +0.25% |
| Q4 2019 | 354.6K | $32M | +0.22% |
| Q3 2019 | 206.6K | $17M | +0.14% |
| Q2 2019 | 464.3K | $39M | +0.32% |
| Q1 2019 | 440.2K | $37M | +0.17% |
| Q4 2018 | 134.0K | $10M | +0.10% |
Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Marshall Wace, LLP’s full portfolio or all institutional holders of MRK.