Jack Y. Zhang - Mar 14, 2025 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role
CEO & CHIEF SCIENTIFIC OFFICER, Director, 10%+ Owner
Signature
/s/ Eva Wen, by power of attorney for Jack Y. Zhang
Stock symbol
AMPH
Transactions as of
Mar 14, 2025
Transactions value $
-$4,016,607
Form type
4
Date filed
3/18/2025, 07:13 PM
Previous filing
Mar 12, 2025
SEC
View on sec.gov

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMPH Common Stock Options Exercise $4.27M +290K +11.13% $14.69 2.9M Mar 14, 2025 Direct
transaction AMPH Common Stock Tax liability -$6.03M -226K -7.8% $26.66 2.67M Mar 14, 2025 Direct F1
transaction AMPH Common Stock Tax liability -$260K -9.77K -0.37% $26.66 2.66M Mar 15, 2025 Direct F2
transaction AMPH Common Stock Tax liability -$447K -16.2K -0.61% $27.69 2.65M Mar 17, 2025 Direct F2
transaction AMPH Common Stock Options Exercise $3.1M +211K +18.39% $14.69 1.36M Mar 14, 2025 See footnote F3
transaction AMPH Common Stock Tax liability -$4.34M -163K -11.96% $26.66 1.2M Mar 14, 2025 See footnote F3, F4
transaction AMPH Common Stock Tax liability -$110K -4.12K -0.34% $26.66 1.19M Mar 15, 2025 See footnote F2, F3
transaction AMPH Common Stock Tax liability -$200K -7.22K -0.61% $27.69 1.19M Mar 17, 2025 See footnote F2, F3
holding AMPH Common Stock 6.83M Mar 14, 2025 See footnote F5

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 Employee Stock Option (right to buy) Options Exercise $0 -290K -100% $0.00 0 Mar 14, 2025 Common Stock 290K $14.69 Direct F6
transaction AMPH Employee Stock Option (right to buy) Options Exercise $0 -211K -100% $0.00 0 Mar 14, 2025 Common Stock 211K $14.69 See footnote F3, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The reported shares were withheld to pay the exercise price and withholding taxes incurred in connection with the exercise of 290,477 options.
F2 The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs.
F3 The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.
F4 The reported shares were withheld to pay the exercise price and withholding taxes incurred in connection with the exercise of 211,213 options.
F5 The shares are held of record by Applied Physics and Chemistry Laboratories, Inc., of which the reporting persons and The Bill Luobei Zhang 2004 Irrevocable Trust are the sole owners.
F6 Shares subject to the option are fully vested and immediately exercisable.