Zhou Rong bought AMPH
December 17, 2025 · Form 4 insider transaction
Zhou Rong bought 9,787 shares of Amphastar Pharmaceuticals, Inc. at $11.33 per share, a transaction worth $110.9K. The trade was recorded as option exercise and disclosed on an SEC Form 4, filed 1 day after the transaction.
Direction
Acquired (buy-side)
Shares
9,787
Price
$11.33
Total value
$110.9K
InsiderZhou Rong
RoleOfficer
SecurityCommon Stock
Transaction codeM: Option exercise
Transaction dateDecember 17, 2025
Filing dateDecember 18, 2025
Shares owned after147,830
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Includes 545 shares acquired on May 31, 2025 and one share acquired on November 30, 2025 under the Issuer's 2014 Employee Stock Purchase Plan.