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Steve Schonfeld’s Amphastar Pharmaceuticals AMPH Stock Holding History

Steve Schonfeld’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
2025
Q3 		– Sell
-10,340
Closed -$237K – 2174
2025
Q2 		$237K Buy
+10,340
New +$257K ﹤0.01% 1746
2025
Q1 		– Sell
-42,614
Closed -$1.58M – 2187
2024
Q4 		$1.58M Buy
42,614
+33,007
+344% +$1.51M 0.01% 927
2024
Q3 		$466K Sell
9,607
-2,143
-18% -$94K ﹤0.01% 1469
2024
Q2 		$470K Buy
11,750
+5,521
+89% +$229K ﹤0.01% 1513
2024
Q1 		$274K Buy
+6,229
New +$322K ﹤0.01% 1684
2023
Q1 		– Sell
-16,398
Closed -$459K – 2065
2022
Q4 		$459K Sell
16,398
-16,502
-50% -$479K ﹤0.01% 1573
2022
Q3 		$924K Buy
32,900
+25,100
+322% +$820K 0.01% 1324
2022
Q2 		$271K Sell
7,800
-14,700
-65% -$525K ﹤0.01% 1729
2022
Q1 		$807K Buy
+22,500
New +$638K 0.01% 1100
2020
Q1 		– Sell
-70,179
Closed -$1.35M – 1117
2019
Q4 		$1.35M Buy
+70,179
New +$1.35M 0.03% 423
2019
Q3 		– Sell
-17,000
Closed -$358K – 1007
2019
Q2 		$358K Sell
17,000
-26,500
-61% -$554K 0.01% 729
2019
Q1 		$888K Buy
+43,500
New +$975K 0.03% 534
2017
Q1 		– Sell
-25,561
Closed -$470K – 585
2016
Q4 		$470K Buy
+25,561
New +$497K 0.06% 349

Other funds holding AMPH

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
TD Asset Management
TD Asset Management Toronto, Ontario, Canada $115B AUM 41.58% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
BTW
Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return
EIP
Epoch Investment Partners New York $17.6B AUM 34.17% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return

Steve Schonfeld's AMPH Position: Q3 2025 in Review

Steve Schonfeld sold out of Amphastar Pharmaceuticals (AMPH) in Q3 2025, closing a stake of 10,340 shares — an estimated $237K sold.

Steve Schonfeld first reported a position in AMPH in Q4 2016 and held it in 13 quarters. The position peaked at $1.58M in Q4 2024. 243 funds tracked by Wall St. Rank hold AMPH as of Q3 2025.

  • Steve Schonfeld reported no remaining Amphastar Pharmaceuticals position as of Q3 2025 after selling out during the quarter.
  • Steve Schonfeld sold 10,340 Amphastar Pharmaceuticals shares in Q3 2025, an estimated $237K.
  • Steve Schonfeld first reported a position in Amphastar Pharmaceuticals in Q4 2016 and held it in 13 quarters.
  • Steve Schonfeld's Amphastar Pharmaceuticals position peaked at $1.58M in Q4 2024.
  • 243 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q3 2025.

Based on Schonfeld Strategic Advisors's 13F filing for Q3 2025, filed 14 Nov 2025.