IIM
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INTECH Investment Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

INTECH Investment Management’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 		$1.01M Buy
49,839
+25,632
+106% +$517K 0.01% 1030
2026
Q1 		$474K Sell
24,207
-39,025
-62% -$955K ﹤0.01% 1353
2025
Q4 		$1.69M Buy
63,232
+12,072
+24% +$311K 0.02% 823
2025
Q3 		$1.36M Buy
51,160
+89
+0.2% +$2.3K 0.01% 1006
2025
Q2 		$1.17M Sell
51,071
-9,218
-15% -$229K 0.01% 1107
2025
Q1 		$1.75M Buy
60,289
+18,133
+43% +$579K 0.02% 841
2024
Q4 		$1.57M Buy
42,156
+29,167
+225% +$1.33M 0.02% 859
2024
Q3 		$630K Buy
12,989
+2,331
+22% +$102K 0.01% 1097
2024
Q2 		$426K Buy
+10,658
New +$442K 0.01% 856

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 $3.38T AUM 44.17% 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

INTECH Investment Management's AMPH Position: Q2 2026 in Review

INTECH Investment Management increased its Amphastar Pharmaceuticals (AMPH) stake by 106% in Q2 2026, buying an estimated $517K and bringing the position to 49,839 shares worth $1.01M. The position accounts for 0.01% of the portfolio, ranked #1030.

INTECH Investment Management first reported a position in AMPH in Q2 2024 and has held it in 9 quarters since. The position peaked at $1.75M in Q1 2025. 211 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • INTECH Investment Management held 49,839 shares of Amphastar Pharmaceuticals worth $1.01M as of Q2 2026.
  • INTECH Investment Management bought 25,632 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $517K.
  • Amphastar Pharmaceuticals made up 0.01% of INTECH Investment Management's portfolio in Q2 2026, its #1030 holding.
  • INTECH Investment Management first reported a position in Amphastar Pharmaceuticals in Q2 2024 and has held it in 9 quarters since.
  • INTECH Investment Management's Amphastar Pharmaceuticals position peaked at $1.75M in Q1 2025.
  • 211 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on INTECH Investment Management's 13F filing for Q2 2026, filed 10 Aug 2026.