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* Merrigan Paul J (Last) (First) (Middle) 355 ALHAMBRA CIRCLE SUITE 1250 (Street) CORAL GABLES FL 33134 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 09/08/2015	3. Issuer Name and Ticker or Trading Symbol CATALYST PHARMACEUTICALS, INC. [ CPRX ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Chief Commercial Officer	5. If Amendment, Date of Original Filed (Month/Day/Year) 09/16/2015
			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)

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)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Options to purchase common stock	09/08/2016	09/08/2022	Common Stock	50,000	4.2(2)	D
Options to purchase common stock	(1)	09/08/2022	Common Stock	(1)	4.2(2)	D
Options to purchase common stock	09/08/2018	09/08/2022	Common Stock	4,159	4.2(2)	D

Explanation of Responses:

1. 4,167 shares will vest on a monthly basis on the 8th of each month commencing on October 8, 2016 through and until August 8, 2018.

2. This Form 3/A is being filed to correct a scrivener's error in the exercise price of the stock options reported in the Reporting Person's Form 3 originally filed on September 16, 2015. The correct exercise price of the stock options is $4.20 per share rather than the $3.89 per share reported in the Form 3 as originally filed. In all other respects, the Form 3/A is identical to the Form 3 as originally filed.

	/s/ Paul J. Merrigan	10/09/2015
	** 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).
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