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, 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 *   Merrigan Paul J 2. Date of Event Requiring Statement (Month/Day/Year) 09/08/2015 3. Issuer Name and Ticker or Trading Symbol CATALYST PHARMACEUTICALS, INC. [CPRX] (Last) (First) (Middle) 355 ALHAMBRA CIRCLE, SUITE 1250 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 Original Filed(Month/Day/Year) 09/16/2015 (Street) CORAL GABLES, FL 33134 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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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 of Derivative Security: 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	Â
Options to purchase common stock	  (1)	09/08/2022	Common Stock	(1)	$ 4.2 (2)	D	Â
Options to purchase common stock	09/08/2018	09/08/2022	Common Stock	4,159	$ 4.2 (2)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Merrigan Paul J 355 ALHAMBRA CIRCLE SUITE 1250 CORAL GABLES, FL 33134	Â	Â	  Chief Commercial Officer	Â

Signatures

/s/ Paul J. Merrigan		10/09/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(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.

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