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Advisory Research’s Amphastar Pharmaceuticals AMPH Stock Holding History

Advisory Research’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 		$496K Buy
25,335
+10,174
+67% +$249K 0.06% 129
2025
Q4 		$406K Sell
15,161
-307
-2% -$7.91K 0.05% 136
2025
Q3 		$412K Buy
15,468
+570
+4% +$14.7K 0.05% 134
2025
Q2 		$342K Buy
14,898
+1,009
+7% +$25K 0.05% 130
2025
Q1 		$403K Buy
13,889
+36
+0.3% +$1.15K 0.07% 138
2024
Q4 		$514K Buy
13,853
+43
+0.3% +$1.97K 0.09% 134
2024
Q3 		$670K Sell
13,810
-460
-3% -$20.2K 0.12% 125
2024
Q2 		$571K Buy
14,270
+941
+7% +$39K 0.11% 132
2024
Q1 		$585K Sell
13,329
-845
-6% -$43.6K 0.12% 125
2023
Q4 		$877K Sell
14,174
-716
-5% -$37.6K 0.14% 175
2023
Q3 		$685K Sell
14,890
-517
-3% -$28.2K 0.1% 235
2023
Q2 		$885K Buy
15,407
+628
+4% +$27.8K 0.11% 218
2023
Q1 		$554K Buy
+14,779
New +$484K 0.09% 233
2022
Q4 		– Sell
-15,148
Closed -$426K – 367
2022
Q3 		$426K Buy
+15,148
New +$495K 0.04% 252

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
Marshall Wace
Marshall Wace London, United Kingdom $93.4B AUM 35.1% 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