David Russell Gaugh - 18 Jul 2025 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role
Director
Signature
/s/ Eva Wen, by power of attorney
Issuer symbol
AMPH
Transactions as of
18 Jul 2025
Net transactions value
$0
Form type
4
Filing time
22 Jul 2025, 16:23:29 UTC
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Gaugh David Russell Director C/O AMPHASTAR PHARMACEUTICALS, INC., 11570 6TH STREET, RANCHO CUCAMONGA /s/ Eva Wen, by power of attorney 22 Jul 2025 0002075974

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMPH Common Stock Award $0 +6,304 $0.000000 6,304 18 Jul 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AMPH Stock Option (right to buy) Award $0 +13,987 $0.000000 13,987 18 Jul 2025 Common Stock 13,987 $20.62 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The reported shares are represented by restricted stock units, or RSUs, all of which vest on July 18, 2026.
F2 All of the shares subject to the option vest on July 18, 2026.