Zhou Rong bought AMPH
March 9, 2026 · Form 4 insider transaction
Zhou Rong bought 81,341 shares of Amphastar Pharmaceuticals, Inc. at $0.00 per share, a transaction worth N/A. The trade was recorded as grant or award and disclosed on an SEC Form 4, filed 2 days after the transaction.
Direction
Acquired (buy-side)
Shares
81,341
Price
$0.00
Total value
N/A
InsiderZhou Rong
RoleOfficer
SecurityEmployee Stock Option (right to buy)
Transaction codeA: Grant or award
Transaction dateMarch 9, 2026
Filing dateMarch 11, 2026
Shares owned after81,341
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
The shares subject to the option vest in four equal annual installments beginning on March 9, 2027.