Sec Form 4 Filing - Zhang Jack Y. @ Amphastar Pharmaceuticals, Inc. - 2021-03-16

Insider filing report for Changes in Beneficial Ownership
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FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person
Zhang Jack Y.
2. Issuer Name and Ticker or Trading Symbol
Amphastar Pharmaceuticals, Inc. [ AMPH]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X __ Director X __ 10% Owner
X __ Officer (give title below) _____ Other (specify below)
CEO & Chief Scientific Officer
(Last) (First) (Middle)
C/O AMPHASTAR PHARMACEUTICALS, INC., 11570 6TH STREET
3. Date of Earliest Transaction (MM/DD/YY)
03/16/2021
(Street)
RANCHO CUCAMONGA, CA91730
4. If Amendment, Date Original Filed (MM/DD/YY)
6. Individual or Joint/Group Filing (Check Applicable Line)
_____ Form filed by One Reporting Person
__ X __ Form filed by More than One Reporting Person
(City) (State) (Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/16/2021 F 25,241 ( 1 ) D $ 18.44 2,193,659 D
Common Stock 03/16/2021 F 8,890 ( 1 ) D $ 18.44 1,431,479 I See footnote ( 2 )
Common Stock 03/17/2021 A 127,209 ( 3 ) A $ 0 2,320,868 D
Common Stock 03/17/2021 A 56,892 ( 3 ) A $ 0 1,488,371 I See footnote ( 2 )
Common Stock 6,827,679 I See footnote ( 4 )
Common Stock 5,000 I See footnote ( 5 )
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exerci se Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(MM/DD/YY)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) $ 17.99 03/17/2021 A 298,688 ( 6 ) 03/17/2031 Common Stock 298,688 $ 0 298,688 D
Employee Stock Option (right to buy) $ 17.99 03/17/2021 A 133,585 ( 6 ) 03/17/2031 Common Stock 133,585 $ 0 133,585 I See footnote ( 2 )
Reporting Owners
Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Zhang Jack Y.
C/O AMPHASTAR PHARMACEUTICALS, INC.
11570 6TH STREET
RANCHO CUCAMONGA, CA91730
X X CEO & Chief Scientific Officer
Luo Mary Z.
C/O AMPHASTAR PHARMACEUTICALS, INC.
11570 6TH STREET
RANCHO CUCAMONGA, CA91730
X X COO,Chief Scientist & Chairman
Signatures
/s/ Eva Wen, by power of attorney for Jack Y. Zhang 03/18/2021
Signature of Reporting Person Date
/s/ Eva Wen, by power of attorney for Mary Z. Luo 03/18/2021
Signature of Reporting Person Date
Explanation of Responses:
( 1 )The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs.
( 2 )The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.
( 3 )The reported shares are represented by RSUs which vest in four equal annual installments beginning on March 17, 2022.
( 4 )The shares are held of record by Applied Physics & Chemistry Laboratories, Inc., of which the reporting persons and The Bill Luobei Zhang 2004 Irrevocable Trust are the sole owners.
( 5 )The shares are held of record in an account for the benefit of the reporting persons' son. The reporting persons disclaim beneficial ownership of these shares, and the inclusion of these shares in this report should not be deemed an admission of beneficial ownership of any such shares for purposes of Section 16, or for any other purpose.
( 6 )Shares subject to the option vest in four equal annual installments beginning on March 17, 2022.

Remarks:
Excludes 200,000 shares previously reported as held indirectly by The Bill Luobei Zhang 2004 Irrevocable Trust. The reporting persons hold no beneficial ownership of these shares.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
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