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AMPHAMPH
20 quarters

Position history for MWMARSHALL WACE, LLP's holdings in AMPHASTAR PHARMACEUTICALS IN

MARSHALL WACE, LLP holds 1.1M shares of AMPH (AMPHASTAR PHARMACEUTICALS IN), worth $21.5M as of 2026-Q2. The position was increased (+4.0% shares). AMPH represents 0.0% of MARSHALL WACE, LLP's portfolio.

Current Value

$21.5M

Current Shares

1.1M

Total Value Change

+$13.3M

Total Shares Change

+653,029

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q2
Latest
Increased
1.1M
+4.0%
$21.5M0.0%$20.18
30
2026-Q1
Decreased
1M
-17.1%
$20.1M0.0%$19.83
0
2025-Q4
Increased
1.2M
+41.5%
$33.1M0.0%$27.00
39
2025-Q3
Increased
874,068
+3.0%
$23.3M0.0%$26.92
29
2025-Q2
Decreased
848,685
-17.7%
$19.5M0.0%$23.08
0
2025-Q1
Increased
1M
+69.5%
$29.9M0.0%$28.43
43
2024-Q4
Increased
608,706
+7.1%
$22.6M0.0%$36.84
31
2024-Q3
Increased
568,494
+150.3%
$27.6M0.0%$48.02
46
2024-Q2
New
227,127
-
$9.1M0.0%$40.00
38
2023-Q2
Exited
0
-100.0%
$00.0%$55.91
0
2023-Q1
New
64,209
-
$2.4M0.0%$37.67
36
2022-Q4
Exited
0
-100.0%
$00.0%$28.02
0
2022-Q3
Increased
31,638
+11.2%
$890,0000.0%$28.99
28
2022-Q2
Increased
28,441
+63.3%
$989,0000.0%$34.15
36
2022-Q1
New
17,417
-
$625,0000.0%$36.43
34
2020-Q3
Exited
0
-100.0%
$00.0%$18.63
0
2020-Q2
Decreased
132,228
-56.2%
$3M0.0%$22.12
0
2020-Q1
Increased
301,910
+2.7%
$4.5M0.0%$15.12
28
2019-Q4
Decreased
294,064
-28.9%
$5.7M0.0%$19.22
0
2019-Q3
New
413,293
-
$8.2M0.1%$20.22
38

Other major holders of AMPH: BNP PARIBAS FINANCIAL MARKETS, BlackRock Finance, Inc., BlackRock, Inc.

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