Marshall Wace
AMPH icon

Marshall Wace’s Amphastar Pharmaceuticals AMPH Stock Holding History

Marshall Wace’s Portfolio AMPH Stock Details AMPH Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$20.1M Sell
1,025,640
-211,644
-17% -$5.18M 0.02% 703
2025
Q4 		$33.1M Buy
1,237,284
+363,216
+42% +$9.36M 0.03% 464
2025
Q3 		$23.3M Buy
874,068
+25,383
+3% +$655K 0.03% 588
2025
Q2 		$19.5M Sell
848,685
-183,037
-18% -$4.54M 0.02% 595
2025
Q1 		$29.9M Buy
1,031,722
+423,016
+69% +$13.5M 0.04% 401
2024
Q4 		$22.6M Buy
608,706
+40,212
+7% +$1.84M 0.03% 500
2024
Q3 		$27.6M Buy
568,494
+341,367
+150% +$15M 0.04% 415
2024
Q2 		$9.09M Buy
+227,127
New +$9.41M 0.01% 775
2023
Q2 		– Sell
-64,209
Closed -$2.41M – 2438
2023
Q1 		$2.41M Buy
+64,209
New +$2.1M 0.01% 1356
2022
Q4 		– Sell
-31,638
Closed -$890K – 2918
2022
Q3 		$890K Buy
31,638
+3,197
+11% +$104K ﹤0.01% 2460
2022
Q2 		$989K Buy
28,441
+11,024
+63% +$393K ﹤0.01% 2442
2022
Q1 		$625K Buy
+17,417
New +$494K ﹤0.01% 2673
2020
Q3 		– Sell
-132,228
Closed -$2.97M – 1553
2020
Q2 		$2.97M Sell
132,228
-169,682
-56% -$3.11M 0.02% 642
2020
Q1 		$4.48M Buy
301,910
+7,846
+3% +$137K 0.05% 411
2019
Q4 		$5.67M Sell
294,064
-119,229
-29% -$2.29M 0.04% 486
2019
Q3 		$8.2M Buy
+413,293
New +$8.61M 0.07% 350

Other funds holding AMPH

BlackRock
BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
TD Asset Management
TD Asset Management Toronto, Ontario, Canada $123B AUM 34.51% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
BTW
Boston Trust Walden Boston, Massachusetts $12.2B AUM 12.45% 1-Year Est. Return
EIP
Epoch Investment Partners New York $16.5B AUM 24.3% 1-Year Est. Return