Richard K Prins sold $162K of AMPH stock

Richard K Prins, Dir of Amphastar Pharmaceuticals, Inc. (AMPH), sold 7,973 shares of AMPH stock worth $162K, per an SEC Form 4 filed Aug 12, 2026.

It was an open-market sale.

The trade happened on Aug 11, 2026, 1 day before it was made public.

AMPH has moved +43.9% since the trade date, from $20.42 to $29.38 (Nov 9, 2026 close).