O'Shaughnessy Asset Management’s Amphastar Pharmaceuticals AMPH Stock Holding History
Bought
Maintained
Sold
Other funds holding AMPH
O'Shaughnessy Asset Management's AMPH Position: Q2 2026 in Review
O'Shaughnessy Asset Management increased its Amphastar Pharmaceuticals (AMPH) stake by 53% in Q2 2026, buying an estimated $1.12M and bringing the position to 159,427 shares worth $3.22M. The position accounts for 0.01% of the portfolio, ranked #709.
O'Shaughnessy Asset Management first reported a position in AMPH in Q4 2019 and has held it in 7 quarters since. 211 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.
- O'Shaughnessy Asset Management held 159,427 shares of Amphastar Pharmaceuticals worth $3.22M as of Q2 2026.
- O'Shaughnessy Asset Management bought 55,498 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $1.12M.
- Amphastar Pharmaceuticals made up 0.01% of O'Shaughnessy Asset Management's portfolio in Q2 2026, its #709 holding.
- O'Shaughnessy Asset Management first reported a position in Amphastar Pharmaceuticals in Q4 2019 and has held it in 7 quarters since.
- 211 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.
Based on O'Shaughnessy Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.