Amphastar Pharmaceuticals Inc

AMPHNASDAQ · US

Holders

REDUCEDT+30
Peters William J
Amphastar Pharmaceuticals Inc · NASDAQ
−4,139 sh · $103.5K
Filed 23 Sept 2026SEC Form 4view source
REDUCEDT+30
Zhou Rong
Amphastar Pharmaceuticals Inc · NASDAQ
−10,000 sh · $239.4K
Filed 17 Sept 2026SEC Form 4view source
ACQUIREDT+30
Zhou Rong
Amphastar Pharmaceuticals Inc · NASDAQ
+10,000 sh · $133.5K
Filed 17 Sept 2026SEC Form 4view source
REDUCEDStale
Zhou Rong
Amphastar Pharmaceuticals Inc · NASDAQ
−3,187 sh · $75.3K
Filed 3 Sept 2026SEC Form 4view source
DISCLOSEDQuarterly
Oaktree Capital Management
Amphastar Pharmaceuticals Inc · NASDAQ
40,880,000 sh · $37.2M
Filed 30 Jun 2026SEC 13Fview source
DISCLOSEDStale
Oaktree Capital Management
Amphastar Pharmaceuticals Inc · NASDAQ
38,036,000 sh · $34.5M
Filed 31 Mar 2026SEC 13Fview source
DISCLOSEDStale
Oaktree Capital Management
Amphastar Pharmaceuticals Inc · NASDAQ
43,578,000 sh · $40.4M
Filed 31 Dec 2025SEC 13Fview source
DISCLOSEDStale
Oaktree Capital Management
Amphastar Pharmaceuticals Inc · NASDAQ
17,825,000 sh · $16.2M
Filed 30 Sept 2025SEC 13Fview source