Zhou Rong sold AMPH
March 4, 2026 · Form 4 insider transaction
Zhou Rong sold 1,124 shares of Amphastar Pharmaceuticals, Inc. at $19.96 per share, a transaction worth $22.4K. The trade was recorded as shares withheld for taxes and disclosed on an SEC Form 4, filed 2 days after the transaction.
Direction
Disposed (sell-side)
Shares
1,124
Price
$19.96
Total value
$22.4K
InsiderZhou Rong
RoleOfficer
SecurityCommon Stock
Transaction codeF: Shares withheld for taxes
Transaction dateMarch 4, 2026
Filing dateMarch 6, 2026
Shares owned after136,919
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs.