Bridgeway Capital Management
AMPH icon

Bridgeway Capital Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

Bridgeway Capital 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 		$6.03M Sell
298,954
-31,503
-10% -$635K 0.11% 274
2026
Q1 		$6.47M Buy
330,457
+6,908
+2% +$169K 0.13% 220
2025
Q4 		$8.66M Buy
323,549
+11,212
+4% +$289K 0.18% 168
2025
Q3 		$8.32M Buy
312,337
+227,225
+267% +$5.87M 0.18% 171
2025
Q2 		$1.95M Buy
+85,112
New +$2.11M 0.05% 517

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 $3.38T AUM 44.17% 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

Bridgeway Capital Management's AMPH Position: Q2 2026 in Review

Bridgeway Capital Management reduced its Amphastar Pharmaceuticals (AMPH) stake by 9.5% in Q2 2026, selling an estimated $635K and leaving 298,954 shares worth $6.03M. The position accounts for 0.11% of the portfolio, ranked #274.

Bridgeway Capital Management first reported a position in AMPH in Q2 2025 and has held it in 5 quarters since. The position peaked at $8.66M in Q4 2025. 211 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • Bridgeway Capital Management held 298,954 shares of Amphastar Pharmaceuticals worth $6.03M as of Q2 2026.
  • Bridgeway Capital Management sold 31,503 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $635K.
  • Amphastar Pharmaceuticals made up 0.11% of Bridgeway Capital Management's portfolio in Q2 2026, its #274 holding.
  • Bridgeway Capital Management first reported a position in Amphastar Pharmaceuticals in Q2 2025 and has held it in 5 quarters since.
  • Bridgeway Capital Management's Amphastar Pharmaceuticals position peaked at $8.66M in Q4 2025.
  • 211 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on Bridgeway Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.