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MRK
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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

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q1
Latest
Decreased
2.8M
-30.0%
$334.2M0.3%$119.83
0
2025-Q4
Increased
4M
+349.1%
$417.8M0.4%$106.06
60
2025-Q3
Decreased
883,900
-71.9%
$74.2M0.1%$77.91
0
2025-Q2
Increased
3.1M
+412x
$248.9M0.3%$77.66
59
2025-Q1
Increased
7,607
+2198.2%
$682,8040.0%$86.74
40
2024-Q4
Decreased
331
-90.2%
$32,9270.0%$94.81
0
2024-Q3
Decreased
3,360
-99.9%
$381,5610.0%$108.70
0
2024-Q2
Increased
2.6M
+32.5%
$319.9M0.4%$117.58
47

Other major holders of MRK: VANGUARD GROUP INC, BlackRock Finance, Inc., BlackRock, Inc.

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