Position history for MARSHALL WACE, LLP's holdings in MERCK & CO INC
MARSHALL WACE, LLP holds 2.8M shares of MRK (MERCK & CO INC), worth $334.2M as of 2026-Q1. The position was decreased (-30.0% shares). MRK represents 0.3% of MARSHALL WACE, LLP's portfolio.
Current Value
$334.2M
Current Shares
2.8M
Total Value Change
+$14.3M
Total Shares Change
+194,118
Other major holders of MRK: UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
Decreased |
| 2.8M |
-30.0% |
| $334.2M |
| 0.3% |
| $119.83 |
0 |
| 2025-Q4 | Increased | 4M | +349.1% | $417.8M | 0.4% | $106.06 | 60 |
| 2025-Q3 | Decreased | 883,900 | -71.9% | $74.2M | 0.1% | $77.91 | 0 |
| 2025-Q2 | Increased | 3.1M | +412x | $248.9M | 0.3% | $77.66 | 59 |
| 2025-Q1 | Increased | 7,607 | +2198.2% | $682,804 | 0.0% | $86.74 | 40 |
| 2024-Q4 | Decreased | 331 | -90.2% | $32,927 | 0.0% | $94.81 | 0 |
| 2024-Q3 | Decreased | 3,360 | -99.9% | $381,561 | 0.0% | $108.70 | 0 |
| 2024-Q2 | Increased | 2.6M | +32.5% | $319.9M | 0.4% | $117.58 | 47 |