Jack Y. Zhang - 13 Jun 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
13 Jun 2025
Transactions value $
$2,606,000
Form type
4
Filing time
16 Jun 2025, 17:19:35 UTC
Previous filing
18 Mar 2025
SEC
View on sec.gov

Reporting Owners (2)

Name Relationship Address Signature Signature date CIK
Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER, Director, 10%+ Owner C/O AMPHASTAR PHARMACEUTICALS, INC., 11570 6TH STREET, RANCHO CUCAMONGA /s/ Eva Wen, by power of attorney for Jack Y. Zhang 16 Jun 2025 0001611157
Luo Mary Z. COO, Chief Scientist, Chairman, Director, 10%+ Owner C/O AMPHASTAR PHARMACEUTICALS, INC., 11570 6TH STREET, RANCHO CUCAMONGA /s/ Eva Wen, by power of attorney for Mary Z. Luo 16 Jun 2025 0001611156

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMPH Common Stock Options Exercise $2,606,000 +200,000 +7.55% $13.03 2,847,659 13 Jun 2025 Direct
holding AMPH Common Stock 1,185,475 13 Jun 2025 See footnote F1
holding AMPH Common Stock 6,827,679 13 Jun 2025 See footnote 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 Employee Stock Option (right to buy) Options Exercise $0 -200,000 -49.4% $0.000000 205,003 13 Jun 2025 Common Stock 200,000 $13.03 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.
F2 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.
F3 Shares subject to the option are fully vested and immediately exercisable.