Jack Y. Zhang - 14 Mar 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
Issuer symbol
AMPH
Transactions as of
14 Mar 2025
Transactions value $
-$4,016,607
Form type
4
Filing time
18 Mar 2025, 19:13:17 UTC
Previous filing
12 Mar 2025
Next filing
16 Jun 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 $4,267,107 +290,477 +11% $14.69 2,899,859 14 Mar 2025 Direct
transaction AMPH Common Stock Tax liability -$6,032,758 -226,285 -7.8% $26.66 2,673,574 14 Mar 2025 Direct F1
transaction AMPH Common Stock Tax liability -$260,334 -9,765 -0.37% $26.66 2,663,809 15 Mar 2025 Direct F2
transaction AMPH Common Stock Tax liability -$447,193 -16,150 -0.61% $27.69 2,647,659 17 Mar 2025 Direct F2
transaction AMPH Common Stock Options Exercise $3,102,718 +211,213 +18% $14.69 1,359,470 14 Mar 2025 See footnote F3
transaction AMPH Common Stock Tax liability -$4,336,435 -162,657 -12% $26.66 1,196,813 14 Mar 2025 See footnote F3, F4
transaction AMPH Common Stock Tax liability -$109,705 -4,115 -0.34% $26.66 1,192,698 15 Mar 2025 See footnote F2, F3
transaction AMPH Common Stock Tax liability -$200,004 -7,223 -0.61% $27.69 1,185,475 17 Mar 2025 See footnote F2, F3
holding AMPH Common Stock 6,827,679 14 Mar 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 -290,477 -100% $0 0 14 Mar 2025 Common Stock 290,477 $14.69 Direct F6
transaction AMPH Employee Stock Option (right to buy) Options Exercise $0 -211,213 -100% $0 0 14 Mar 2025 Common Stock 211,213 $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.