Sec Form 4 Filing - Sandison Taylor @ Cidara Therapeutics, Inc. - 2019-12-18

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 Sandison Taylor 2. Issuer Name and Ticker or Trading Symbol Cidara Therapeutics, Inc. [ CDTX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Medical Officer (Last) (First) (Middle) 6310 NANCY RIDGE DR, SUITE 101 3. Date of Earliest Transaction (MM/DD/YY) 12/18/2019 (Street) SAN DIEGO, CA92121 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

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. 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) $ 13.62 12/18/2019 D 19,000 ( 1 ) 10/29/2025 Common Stock 19,000 ( 2 ) 0 D Employee Stock Option (right to buy) $ 2.45 12/18/2019 A 12,667 ( 3 ) 12/17/2026 Common Stock 12,667 ( 2 ) 12,667 D Employee Stock Option (right to buy) $ 9.89 12/18/2019 D 5,000 ( 4 ) 03/15/2026 Common Stock 5,000 ( 5 ) 0 D Employee Stock Option (right to buy) $ 2.45 12/18/2019 A 3,333 ( 3 ) 12/17/2026 Common Stock 3,333 ( 5 ) 3,333 D Employee Stock Option (right to buy) $ 11.11 12/18/2019 D 20,000 ( 6 ) 08/31/2026 Common Stock 20,000 ( 7 ) 0 D Employee Stock Option (right to buy) $ 2.45 12/18/2019 A 13,333 ( 3 ) 12/17/2026 Common Stock 13,333 ( 7 ) 13,333 D Employee Stock Option (right to buy) $ 7.8 12/18/2019 D 55,000 ( 8 ) 03/30/2027 Common Stock 55,000 ( 9 ) 0 D Employee Stock Option (right to buy) $ 2.45 12/18/2019 A 32,592 ( 3 ) 12/17/2026 Common Stock 32,592 ( 9 ) 32,592 D Employee Stock Option (right to buy) $ 2.45 12/18/2019 A 4,075 ( 10 ) 12/17/2026 Common Stock 4,075 ( 9 ) 4,075 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Sandison Taylor 6310 NANCY RIDGE DR, SUITE 101 SAN DIEGO, CA92121 Chief Medical Officer Signatures /s/ Jessica Oien, Attorney-in-fact 12/20/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The option provided for vesting as follows: 25% on October 13, 2016 with 1/36th of the remaining shares vesting monthly thereafter, such that all shares subject to the option were vested on October 13, 2019. ( 2 )On December 18, 2019, the issuer canceled, pursuant to the issuer's option exchange program, an option for 19,000 shares of the Issuer's common stock granted to the reporting person on October 30, 2015. In exchange, the reporting person received a replacement option, for 12,667 shares, having an exercise price of $2.45 a share. ( 3 )The option shall vest in full on December 18, 2020. ( 4 )The option provided for vesting in a series of 36 monthly installments and was fully vested on March 16, 2019. ( 5 )On December 18, 2019, the issuer canceled, pursuant to the issuer's option exchange program, an option for 5,000 shares of the Issuer's common stock granted to the reporting person on March 16, 2016. In exchange, the reporting person received a replacement option, for 3,333 shares, having an exercise price of $2.45 a share. ( 6 )The option provided for vesting in a series of 36 monthly installments and was fully vested on September 1, 2019. ( 7 )On December 18, 2019, the issuer canceled, pursuant to the issuer's option exchange program, an option for 20,000 shares of the Issuer's common stock granted to the reporting person on September 1, 2016. In exchange, the reporting person received a replacement option, for 13,333 shares, having an exercise price of $2.45 a share. ( 8 )The option provided for vesting in a series of thirty-six (36) successive equal monthly installments measured from the Vesting Commencement Date of March 31, 2017 such that the option would have been fully vested on March 31, 2020. ( 9 )On December 18, 2019, the issuer canceled, pursuant to the issuer's option exchange program, an option for 55,000 shares of the Issuer's common stock granted to the reporting person on March 31, 2017. In exchange, the reporting person received two replacement options, for an aggregate of 36,667 shares, having an exercise price of $2.45 a share. ( 10 )The option vests as follows: 1/3rd shall vest on December 18, 2020, and the balance of the shares will vest in twenty-four (24) equal monthly installments thereafter, such that all shares subject to the option shall be fully vested on December 18, 2022.

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