T. Rowe Price Associates
AMPH icon

T. Rowe Price Associates’s Amphastar Pharmaceuticals AMPH Stock Holding History

T. Rowe Price Associates’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 		$880K Buy
44,903
+8,107
+22% +$198K ﹤0.01% 2219
2025
Q4 		$986K Sell
36,796
-238,426
-87% -$6.14M ﹤0.01% 2085
2025
Q3 		$7.34M Buy
275,222
+1,934
+0.7% +$49.9K ﹤0.01% 1301
2025
Q2 		$6.28M Sell
273,288
-267,933
-50% -$6.65M ﹤0.01% 1220
2025
Q1 		$15.7M Sell
541,221
-25,435
-4% -$812K ﹤0.01% 1007
2024
Q4 		$21M Sell
566,656
-2,238
-0.4% -$102K ﹤0.01% 989
2024
Q3 		$27.6M Sell
568,894
-15,012
-3% -$659K ﹤0.01% 922
2024
Q2 		$23.4M Sell
583,906
-638
-0.1% -$26.4K ﹤0.01% 917
2024
Q1 		$25.7M Sell
584,544
-2,413
-0.4% -$125K ﹤0.01% 917
2023
Q4 		$36.3M Buy
586,957
+17,245
+3% +$906K ﹤0.01% 789
2023
Q3 		$26.2M Buy
569,712
+63,404
+13% +$3.46M ﹤0.01% 855
2023
Q2 		$29.1M Buy
506,308
+37,888
+8% +$1.68M ﹤0.01% 841
2023
Q1 		$17.6M Sell
468,420
-320,750
-41% -$10.5M ﹤0.01% 947
2022
Q4 		$22.1M Sell
789,170
-19,561
-2% -$568K ﹤0.01% 884
2022
Q3 		$22.7M Buy
808,731
+645,917
+397% +$21.1M ﹤0.01% 871
2022
Q2 		$5.66M Buy
+162,814
New +$5.81M ﹤0.01% 1407

Other funds holding AMPH

BlackRock
BlackRock New York $5.72T 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 $100B 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

T. Rowe Price Associates's AMPH Position: Q1 2026 in Review

T. Rowe Price Associates increased its Amphastar Pharmaceuticals (AMPH) stake by 22% in Q1 2026, buying an estimated $198K and bringing the position to 44,903 shares worth $880K. The position accounts for ﹤0.01% of the portfolio, ranked #2219.

T. Rowe Price Associates first reported a position in AMPH in Q2 2022 and has held it in 16 quarters since. The position peaked at $36.3M in Q4 2023. 215 funds tracked by Wall St. Rank hold AMPH as of Q1 2026.

  • T. Rowe Price Associates held 44,903 shares of Amphastar Pharmaceuticals worth $880K as of Q1 2026.
  • T. Rowe Price Associates bought 8,107 Amphastar Pharmaceuticals shares in Q1 2026, an estimated $198K.
  • Amphastar Pharmaceuticals made up ﹤0.01% of T. Rowe Price Associates's portfolio in Q1 2026, its #2219 holding.
  • T. Rowe Price Associates first reported a position in Amphastar Pharmaceuticals in Q2 2022 and has held it in 16 quarters since.
  • T. Rowe Price Associates's Amphastar Pharmaceuticals position peaked at $36.3M in Q4 2023.
  • 215 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q1 2026.

Based on T. Rowe Price Associates's 13F filing for Q1 2026, filed 15 May 2026.