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Joel Greenblatt’s Amphastar Pharmaceuticals AMPH Stock Holding History

Joel Greenblatt’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 		$205K Buy
+10,139
New +$205K ﹤0.01% 1733
2026
Q1 		– Sell
-27,802
Closed -$745K – 1760
2025
Q4 		$745K Buy
27,802
+12,438
+81% +$320K ﹤0.01% 1337
2025
Q3 		$409K Buy
15,364
+1,350
+10% +$34.9K ﹤0.01% 1426
2025
Q2 		$322K Buy
14,014
+3,144
+29% +$78K ﹤0.01% 1441
2025
Q1 		$315K Sell
10,870
-17,578
-62% -$561K ﹤0.01% 1351
2024
Q4 		$1.06M Sell
28,448
-7,290
-20% -$333K 0.01% 898
2024
Q3 		$1.73M Buy
35,738
+8,063
+29% +$354K 0.02% 766
2024
Q2 		$1.11M Sell
27,675
-1,206
-4% -$50K 0.01% 859
2024
Q1 		$1.27M Buy
28,881
+17,551
+155% +$906K 0.02% 785
2023
Q4 		$701K Buy
11,330
+6,799
+150% +$357K 0.01% 893
2023
Q3 		$208K Sell
4,531
-460
-9% -$25.1K ﹤0.01% 1232
2023
Q2 		$287K Sell
4,991
-3,506
-41% -$155K 0.01% 1131
2023
Q1 		$319K Sell
8,497
-11,765
-58% -$386K 0.01% 1110
2022
Q4 		$568K Sell
20,262
-2,770
-12% -$80.4K 0.02% 857
2022
Q3 		$647K Sell
23,032
-16,400
-42% -$535K 0.02% 786
2022
Q2 		$1.37M Buy
39,432
+28,492
+260% +$1.02M 0.04% 473
2022
Q1 		$393K Buy
+10,940
New +$310K 0.01% 868
2016
Q4 		– Sell
-25,915
Closed -$492K – 937
2016
Q3 		$492K Buy
25,915
+6,336
+32% +$115K 0.01% 712
2016
Q2 		$316K Buy
+19,579
New +$276K ﹤0.01% 801

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
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
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Joel Greenblatt's AMPH Position: Q2 2026 in Review

Joel Greenblatt opened a new position in Amphastar Pharmaceuticals (AMPH) in Q2 2026: 10,139 shares worth $205K. The stake represents ﹤0.01% of the portfolio and ranks #1733 among its holdings. This is a return to the name: Joel Greenblatt previously reported a position in AMPH as recently as Q4 2025.

Joel Greenblatt first reported a position in AMPH in Q2 2016 and has held it in 19 quarters since. The position peaked at $1.73M in Q3 2024. 209 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • Joel Greenblatt held 10,139 shares of Amphastar Pharmaceuticals worth $205K as of Q2 2026.
  • Amphastar Pharmaceuticals was a new Joel Greenblatt position in Q2 2026.
  • Amphastar Pharmaceuticals made up ﹤0.01% of Joel Greenblatt's portfolio in Q2 2026, its #1733 holding.
  • Joel Greenblatt first reported a position in Amphastar Pharmaceuticals in Q2 2016 and has held it in 19 quarters since.
  • Joel Greenblatt's Amphastar Pharmaceuticals position peaked at $1.73M in Q3 2024.
  • 209 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on Gotham Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.