Optiver Holding
AMPH icon

Optiver Holding’s Amphastar Pharmaceuticals AMPH Stock Holding History

Optiver Holding’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 		$3.88K Buy
192
+164
+586% +$3.31K ﹤0.01% 2077
2026
Q1 		$549 Sell
28
-36
-56% -$881 ﹤0.01% 2148
2025
Q4 		$1.71K Sell
64
-82
-56% -$2.11K ﹤0.01% 2089
2025
Q3 		$3.89K Buy
+146
New +$3.77K ﹤0.01% 1976

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

Optiver Holding's AMPH Position: Q2 2026 in Review

Optiver Holding increased its Amphastar Pharmaceuticals (AMPH) stake by 586% in Q2 2026, buying an estimated $3.31K and bringing the position to 192 shares worth $3.88K. The position accounts for ﹤0.01% of the portfolio, ranked #2077.

Optiver Holding first reported a position in AMPH in Q3 2025 and has held it in 4 quarters since. The position peaked at $3.89K in Q3 2025. 210 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • Optiver Holding held 192 shares of Amphastar Pharmaceuticals worth $3.88K as of Q2 2026.
  • Optiver Holding bought 164 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $3.31K.
  • Amphastar Pharmaceuticals made up ﹤0.01% of Optiver Holding's portfolio in Q2 2026, its #2077 holding.
  • Optiver Holding first reported a position in Amphastar Pharmaceuticals in Q3 2025 and has held it in 4 quarters since.
  • Optiver Holding's Amphastar Pharmaceuticals position peaked at $3.89K in Q3 2025.
  • 210 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on Optiver Holding's 13F filing for Q2 2026, filed 12 Aug 2026.