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SummerHaven Investment Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

SummerHaven 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 		$659K Hold
32,633
– – 0.35% 155
2026
Q1 		$639K Sell
32,633
-5,567
-15% -$136K 0.39% 139
2025
Q4 		$1.02M Hold
38,200
– – 0.58% 43
2025
Q3 		$1.02M Buy
+38,200
New +$986K 0.59% 33

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

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

SummerHaven Investment Management held its Amphastar Pharmaceuticals (AMPH) position steady in Q2 2026 at 32,633 shares worth $659K. The position accounts for 0.35% of the portfolio, ranked #155.

SummerHaven Investment Management first reported a position in AMPH in Q3 2025 and has held it in 4 quarters since. The position peaked at $1.02M in Q4 2025. 212 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • SummerHaven Investment Management held 32,633 shares of Amphastar Pharmaceuticals worth $659K as of Q2 2026.
  • SummerHaven Investment Management left its Amphastar Pharmaceuticals share count unchanged in Q2 2026.
  • Amphastar Pharmaceuticals made up 0.35% of SummerHaven Investment Management's portfolio in Q2 2026, its #155 holding.
  • SummerHaven Investment Management first reported a position in Amphastar Pharmaceuticals in Q3 2025 and has held it in 4 quarters since.
  • SummerHaven Investment Management's Amphastar Pharmaceuticals position peaked at $1.02M in Q4 2025.
  • 212 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on SummerHaven Investment Management's 13F filing for Q2 2026, filed 21 Jul 2026.