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Redwood Investments’s Amphastar Pharmaceuticals AMPH Stock Holding History

Redwood Investments’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
2025
Q1 		– Sell
-21,459
Closed -$797K – 96
2024
Q4 		$797K Sell
21,459
-27
-0.1% -$1.24K 0.21% 89
2024
Q3 		$1.04M Sell
21,486
-5,283
-20% -$232K 0.31% 89
2024
Q2 		$1.06M Sell
26,769
-8,287
-24% -$343K 0.36% 90
2024
Q1 		$1.52M Buy
+35,056
New +$1.81M 0.44% 86

Other funds holding AMPH

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
TD Asset Management
TD Asset Management Toronto, Ontario, Canada $115B AUM 41.58% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return
EIP
Epoch Investment Partners New York $16.5B AUM 24.3% 1-Year Est. Return
BTW
Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Redwood Investments's AMPH Position: Q1 2025 in Review

Redwood Investments sold out of Amphastar Pharmaceuticals (AMPH) in Q1 2025, closing a stake of 21,459 shares — an estimated $797K sold.

Redwood Investments first reported a position in AMPH in Q1 2024 and held it in 4 quarters. The position peaked at $1.52M in Q1 2024. 241 funds tracked by Wall St. Rank hold AMPH as of Q1 2025.

  • Redwood Investments reported no remaining Amphastar Pharmaceuticals position as of Q1 2025 after selling out during the quarter.
  • Redwood Investments sold 21,459 Amphastar Pharmaceuticals shares in Q1 2025, an estimated $797K.
  • Redwood Investments first reported a position in Amphastar Pharmaceuticals in Q1 2024 and held it in 4 quarters.
  • Redwood Investments's Amphastar Pharmaceuticals position peaked at $1.52M in Q1 2024.
  • 241 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q1 2025.

Based on Redwood Investments's 13F filing for Q1 2025, filed 16 May 2025.