Rafferty Asset Management
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Rafferty Asset Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

Rafferty Asset 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
Q1 		– Sell
-7,682
Closed -$206K – 1063
2025
Q4 		$206K Buy
+7,682
New +$198K ﹤0.01% 1102
2025
Q2 		– Sell
-8,126
Closed -$236K – 1078
2025
Q1 		$236K Buy
+8,126
New +$260K ﹤0.01% 1008
2024
Q4 		– Sell
-5,714
Closed -$277K – 1142
2024
Q3 		$277K Sell
5,714
-46
-0.8% -$2.02K ﹤0.01% 1048
2024
Q2 		$230K Buy
5,760
+343
+6% +$14.2K ﹤0.01% 1105
2024
Q1 		$238K Buy
5,417
+1,788
+49% +$92.3K ﹤0.01% 1048
2023
Q4 		$224K Sell
3,629
-820
-18% -$43.1K ﹤0.01% 1052
2023
Q3 		$205K Buy
+4,449
New +$243K ﹤0.01% 1055
2022
Q3 		– Sell
-7,735
Closed -$269K – 1147
2022
Q2 		$269K Buy
+7,735
New +$276K ﹤0.01% 947

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
TD Asset Management
TD Asset Management Toronto, Ontario, Canada $115B AUM 41.58% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
BTW
Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return

Rafferty Asset Management's AMPH Position: Q1 2026 in Review

Rafferty Asset Management sold out of Amphastar Pharmaceuticals (AMPH) in Q1 2026, closing a stake of 7,682 shares — an estimated $206K sold.

Rafferty Asset Management first reported a position in AMPH in Q2 2022 and held it in 8 quarters. The position peaked at $277K in Q3 2024. 215 funds tracked by Wall St. Rank hold AMPH as of Q1 2026.

  • Rafferty Asset Management reported no remaining Amphastar Pharmaceuticals position as of Q1 2026 after selling out during the quarter.
  • Rafferty Asset Management sold 7,682 Amphastar Pharmaceuticals shares in Q1 2026, an estimated $206K.
  • Rafferty Asset Management first reported a position in Amphastar Pharmaceuticals in Q2 2022 and held it in 8 quarters.
  • Rafferty Asset Management's Amphastar Pharmaceuticals position peaked at $277K in Q3 2024.
  • 215 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q1 2026.

Based on Rafferty Asset Management's 13F filing for Q1 2026, filed 15 May 2026.