Sec Form 4 Filing - Heron Patrick J @ Cidara Therapeutics, Inc. - 2015-04-20

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 Heron Patrick J 2. Issuer Name and Ticker or Trading Symbol Cidara Therapeutics, Inc. [ CDTX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 601 UNION STREET, SUITE 3200 3. Date of Earliest Transaction (MM/DD/YY) 04/20/2015 (Street) SEATTLE, WA98101 4. If Amendment, Date Original Filed (MM/DD/YY) 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 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 04/20/2015 P 155,645 A $ 16 155,645 I By limited partnership ( 1 ) Common Stock 04/20/2015 C 865,590 A 1,021,235 I By limited partnership ( 1 ) Common Stock 04/20/2015 P 44,355 A $ 16 44,355 I By limited partnership ( 3 ) Common Stock 04/20/2015 C 246,668 A 291,023 I By limited partnership ( 3 )

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 Exercise 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. Own ership 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 Convertible Preferred Stock ( 2 ) 04/20/2015 C 865,590 ( 2 ) ( 2 ) Common Stock 865,590 $ 0 0 I By limited partnership ( 1 ) Convertible Preferred Stock ( 2 ) 04/20/2015 C 246,668 ( 2 ) ( 2 ) Common Stock 246,668 $ 0 0 I By limited partnership ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Heron Patrick J 601 UNION STREET SUITE 3200 SEATTLE, WA98101 X Signatures /s/ Marc Wilson, Attorney-in-fact 04/22/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares are held by Frazier Healthcare VII, LP. FHM VII LLC, or FHM, is the general partner of each of Frazier Healthcare VII, LP and Frazier Healthcare VII-A, LP. FHM may be deemed to have sole voting and investment power over the shares beneficially owned by Frazier Healthcare VII, LP and Frazier Healthcare VII-A, LP. The reporting person is one of the managing members of FHM and disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein. ( 2 )In connection with the Issuer's initial public offering, the preferred stock automatically converted into shares of the Issuer's common stock at the rate of 1 share of common stock for each 25.4 shares of preferred stock. The preferred stock had no expiration date. ( 3 )Shares are held by Frazier Healthcare VII-A, LP. FHM VII LLC, or FHM, is the general partner of each of Frazier Healthcare VII, LP and Frazier Healthcare VII-A, LP. FHM may be deemed to have sole voting and investment power over the shares beneficially owned by Frazier Healthcare VII, LP and Frazier Healthcare VII-A, LP. The reporting person is one of the managing members of FHM and disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein.

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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