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David Shaw’s Amphastar Pharmaceuticals AMPH Stock Holding History

David Shaw’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
Q2 		$17.9M Buy
887,048
+221,506
+33% +$4.47M 0.01% 1359
2026
Q1 		$13M Buy
665,542
+108,476
+19% +$2.65M 0.01% 1419
2025
Q4 		$14.9M Buy
557,066
+39,844
+8% +$1.03M 0.01% 1439
2025
Q3 		$13.8M Buy
517,222
+223,294
+76% +$5.77M 0.01% 1431
2025
Q2 		$6.75M Buy
293,928
+264,740
+907% +$6.57M ﹤0.01% 1797
2025
Q1 		$846K Sell
29,188
-89,663
-75% -$2.86M ﹤0.01% 3195
2024
Q4 		$4.41M Buy
118,851
+95,192
+402% +$4.35M ﹤0.01% 2082
2024
Q3 		$1.15M Buy
+23,659
New +$1.04M ﹤0.01% 3177
2024
Q1 		– Sell
-77,080
Closed -$4.77M – 4316
2023
Q4 		$4.77M Sell
77,080
-23,093
-23% -$1.21M ﹤0.01% 1944
2023
Q3 		$4.61M Sell
100,173
-23,426
-19% -$1.28M ﹤0.01% 1881
2023
Q2 		$7.1M Sell
123,599
-13,714
-10% -$608K 0.01% 1623
2023
Q1 		$5.15M Buy
137,313
+79,365
+137% +$2.6M 0.01% 1917
2022
Q4 		$1.62M Buy
57,948
+69
+0.1% +$2K ﹤0.01% 3097
2022
Q3 		$1.63M Sell
57,879
-3,856
-6% -$126K ﹤0.01% 3182
2022
Q2 		$2.15M Sell
61,735
-3,404
-5% -$121K ﹤0.01% 3001
2022
Q1 		$2.34M Buy
65,139
+38,370
+143% +$1.09M ﹤0.01% 3156
2021
Q4 		$623K Buy
+26,769
New +$547K ﹤0.01% 4276
2021
Q3 		– Sell
-35,699
Closed -$720K – 4938
2021
Q2 		$720K Buy
35,699
+17,921
+101% +$338K ﹤0.01% 3810
2021
Q1 		$326K Buy
17,778
+4,891
+38% +$90.9K ﹤0.01% 3675
2020
Q4 		$259K Buy
+12,887
New +$251K ﹤0.01% 3645
2016
Q3 		– Sell
-14,208
Closed -$229K – 3355
2016
Q2 		$229K Sell
14,208
-8,293
-37% -$117K ﹤0.01% 3142
2016
Q1 		$270K Sell
22,501
-78,974
-78% -$931K ﹤0.01% 3065
2015
Q4 		$1.44M Buy
101,475
+84,153
+486% +$1.11M ﹤0.01% 2381
2015
Q3 		$202K Sell
17,322
-14,110
-45% -$212K ﹤0.01% 3498
2015
Q2 		$553K Sell
31,432
-4,470
-12% -$69.7K ﹤0.01% 3106
2015
Q1 		$537K Buy
+35,902
New +$480K ﹤0.01% 3015

Other funds holding AMPH

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
California State Teachers Retirement System (CalSTRS)
California State Teachers Retirement System (CalSTRS) West Sacramento, California $782B AUM 28.39% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

David Shaw's AMPH Position: Q2 2026 in Review

David Shaw increased its Amphastar Pharmaceuticals (AMPH) stake by 33% in Q2 2026, buying an estimated $4.47M and bringing the position to 887,048 shares worth $17.9M. The position accounts for 0.01% of the portfolio, ranked #1359.

David Shaw first reported a position in AMPH in Q1 2015 and has held it in 26 quarters since. 210 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • David Shaw held 887,048 shares of Amphastar Pharmaceuticals worth $17.9M as of Q2 2026.
  • David Shaw bought 221,506 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $4.47M.
  • Amphastar Pharmaceuticals made up 0.01% of David Shaw's portfolio in Q2 2026, its #1359 holding.
  • David Shaw first reported a position in Amphastar Pharmaceuticals in Q1 2015 and has held it in 26 quarters since.
  • 210 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.