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Richard K Prins is Director at Amphstar Pharmaceuticals, Inc.. OQRO lists 7 transactions filed with the SEC under this name, the latest on Aug 12, 2026, each linked to the official Form 4.
Director
Disclosures on record
7
Companies involved
1
Amphstar Pharmaceuticals, Inc.AMPH
7 disclosures · Nov 2025 – Aug 2026 · 2 sold
Aug 11, 2026Sold~$162Kdisclosed Aug 12
DetailsOfficial recordJun 1, 20268,143disclosed Jun 4
DetailsOfficial recordJun 1, 202617Kdisclosed Jun 4
Aug 19, 20241,500disclosed Jun 4
DetailsOfficial recordNov 25, 2025Sold~$113Kdisclosed Nov 26
DetailsOfficial recordNov 25, 20254,179disclosed Nov 26
DetailsOfficial recordNov 25, 20254,179disclosed Nov 26
DetailsOfficial record