Zhou Rong sold AMPH
March 15, 2026 · Form 4 insider transaction
Zhou Rong sold 1,225 shares of Amphastar Pharmaceuticals, Inc. at $18.18 per share, a transaction worth $22.3K. 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
1,225
Price
$18.18
Total value
$22.3K
InsiderZhou Rong
RoleOfficer
SecurityCommon Stock
Transaction codeF: Shares withheld for taxes
Transaction dateMarch 15, 2026
Filing dateMarch 17, 2026
Shares owned after171,554
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.