SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Liawatidewi Yakob

(Last)

(First)

(Middle)

C/O AMPHASTAR PHARMACEUTICALS, INC.

11570 6TH STREET

(Street)

RANCHO CUCAMONGA

91730

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
06/07/2018

3. Issuer Name and Ticker or Trading Symbol
Amphastar Pharmaceuticals, Inc. [ AMPH ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP Corp Admin Center

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	39,289⁽¹⁾	D
Common Stock	10,369	I	See footnote⁽²⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (right to buy)	⁽³⁾	08/28/2018	Common Stock	11,000	$35.32	D
Employee Stock Option (right to buy)	⁽³⁾	08/05/2019	Common Stock	11,500	$20.26	D
Employee Stock Option (right to buy)	⁽³⁾	03/08/2021	Common Stock	6,000	$11.41	D
Employee Stock Option (right to buy)	⁽³⁾	12/22/2021	Common Stock	4,903	$14.23	D
Employee Stock Option (right to buy)	⁽³⁾	11/07/2022	Common Stock	20,000	$10.48	D
Employee Stock Option (right to buy)	⁽³⁾	07/30/2023	Common Stock	26,000	$10.93	D
Employee Stock Option (right to buy)	⁽³⁾	04/14/2024	Common Stock	4,904	$14.4	D
Employee Stock Option (right to buy)	⁽⁴⁾	03/26/2025	Common Stock	17,800	$14.95	D
Employee Stock Option (right to buy)	⁽⁵⁾	03/17/2026	Common Stock	29,801	$11.33	D
Employee Stock Option (right to buy)	⁽⁶⁾	03/16/2027	Common Stock	23,352	$13.35	D
Employee Stock Option (right to buy)	⁽⁷⁾	03/15/2028	Common Stock	18,892	$19.79	D

Explanation of Responses:

1. Of the reported shares, 21,801 shares are represented by restricted stock units, or RSUs which vest as follows: (i) 1,680 RSUs vest on March 26, 2019; (ii) 4,964 RSUs vest in two equal annual installments beginning on March 17, 2019; (iii) 7,022 RSUs vest in three equal annual installments beginning on March 16, 2019; and (iv) 8,135 RSUs vest in four equal annual installments beginning on March 15, 2019.

2. The reported shares are held of record by the Yakob and Sunmoon Trust dated July 25, 2013 for which the reporting person serves as a trustee.

3. Shares subject to the option are fully vested and immediately exercisable.

4. Shares subject to the option vest in four equal annual installments beginning on March 26, 2016.

5. Shares subject to the option vest in four equal annual installments beginning on March 17, 2017.

6. Shares subject to the option vest in four equal annual installments beginning on March 16, 2018.

7. Shares subject to the option vest in four equal annual installments beginning on March 15, 2019.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Eva Wen by power of attorney	06/18/2018
	** Signature of Reporting Person	Date
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 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.