Which Hedge Funds Own AMPH — Amphastar Pharmaceuticals Inc

13 of the hedge funds we track hold AMPH, worth $134.6M combined as of the Q2 2026 13F filings.

Versus the prior quarter: 2 opened a new position, 8 added, 3 trimmed.

11 of those are hedged quant multi-strategy books, not directional conviction.

• Oaktree Capital Management — $37.2M (ADD)
• Gotham Asset Management — $205K (NEW)
• Millennium Management — $31.6M (ADD)

Insider buying at AMPH · All tracked funds