Howard Lee - 02 Jun 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
02 Jun 2025
Transactions value $
-$24,007
Form type
4
Filing time
04 Jun 2025, 20:04:41 UTC
Previous filing
05 Jun 2024
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Lee Howard Director C/O AMPHASTAR PHARMACEUTICALS, INC., 11570 6TH STREET, RANCHO CUCAMONGA /s/ Eva Wen, by power of attorney 04 Jun 2025 0001379941

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMPH Common Stock Award $0 +5.12K +3.47% $0.00 153K 02 Jun 2025 Direct F1
transaction AMPH Common Stock Tax liability -$24K -923 -0.6% $26.01 152K 03 Jun 2025 Direct F2

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 +11.4K $0.00 11.4K 02 Jun 2025 Common Stock 11.4K $25.38 Direct F3
* 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 June 2, 2026.
F2 The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of RSUs.
F3 All of the shares subject to the option vest on June 2, 2026.