Ownership Submission
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 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
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
BARBARI SHARON SURREY
  2. Issuer Name and Ticker or Trading Symbol
CYTOKINETICS INC [CYTK]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP, Finance & CFO
(Last)
(First)
(Middle)
280 EAST GRAND AVENUE
3. Date of Earliest Transaction (Month/Day/Year)
02/24/2010
(Street)

SOUTH SAN FRANCISCO, CA 94080
4. If Amendment, Date 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
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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               14,127 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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 control number. SEC 1474 (9-02)

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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)
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
Incentive Stock Option (right to buy) $ 3.08 02/24/2010   A   38,581   03/24/2010(1) 02/24/2020 Common Stock 38,581 $ 0 38,581 D  
Non-Qualified Stock Option (right to buy) $ 3.08 02/24/2010   A   96,419   03/24/2010(1) 02/24/2020 Common Stock 96,419 $ 0 96,419 D  
Incentive Stock Option (right to buy) $ 1.85             03/26/2009(2) 02/26/2019 Common Stock 43,752   43,752 D  
Incentive Stock Option (right to buy) $ 3.37             03/29/2008(3) 02/28/2018 Common Stock 27,305   27,305 D  
Incentive Stock Option (right to buy) $ 6.59             04/11/2005(4) 04/11/2015 Common Stock 1,031   1,031 D  
Incentive Stock Option (right to buy) $ 6.81             04/01/2007(5) 03/14/2017 Common Stock 14,497   14,497 D  
Incentive Stock Option (right to buy) $ 7.15             03/01/2006(6) 03/01/2016 Common Stock 16,785   16,785 D  
Incentive Stock Option (right to buy) $ 9.95             09/07/2005(7) 09/15/2014 Common Stock 40,200   40,200 D  
Non-Qualified Stock Option (right to buy) $ 1.85             03/26/2009(2) 02/26/2019 Common Stock 106,248   106,248 D  
Non-Qualified Stock Option (right to buy) $ 3.37             03/29/2008(3) 02/28/2018 Common Stock 95,695   95,695 D  
Non-Qualified Stock Option (right to buy) $ 6.59             04/11/2005(4) 04/11/2015 Common Stock 15,469   15,469 D  
Non-Qualified Stock Option (right to buy) $ 6.81             04/01/2007(5) 03/14/2017 Common Stock 45,503   45,503 D  
Non-Qualified Stock Option (right to buy) $ 7.15             03/01/2006(6) 03/01/2016 Common Stock 43,215   43,215 D  
Non-Qualified Stock Option (right to buy) $ 9.95             09/07/2005(7) 09/15/2014 Common Stock 69,800   69,800 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
BARBARI SHARON SURREY
280 EAST GRAND AVENUE
SOUTH SAN FRANCISCO, CA 94080
      EVP, Finance & CFO  

Signatures

 Sharon Barbari   02/26/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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) When the ISO and NQ dated 02/24/2010 are combined for a total grant of 135,000 shares, the option shall vest and become exercisable as to 2,812 shares on 03/24/2010 and the balance of 132,188 divided into equal monthly installments thereafter such that the option shall be 100% vested on 02/24/2014.
(2) When the ISO and NQ dated 02/26/2009 are combined for a total grant of 150,000 shares, the option shall vest and become exercisable as to 3,125 shares on 03/26/09 and the balance of 146,875 divided into equal monthly installments thereafter such that the option shall be 100% vested on 02/26/13.
(3) When the ISO and NQ dated 02/29/2008 are combined for a total grant of 125,000 shares, the option shall vest and become exercisable as to 2,604 shares on 03/29/08 and the balance of 122,396 divided into equal monthly installments thereafter such that the option shall be 100% vested on 02/29/12.
(4) When the ISO and NQ dated 04/11/05 are combined for a total grant of 16,500 shares, the option shall vest and become exercisable as to 16,500 shares divided into equal monthly installments such that the option shall be 100% vested on 03/01/2009.
(5) When the ISO and NQ dated 03/14/2007 are combined for a total grant of 60,000 shares, the option shall vest and become exercisable as to 1,250 shares on 04/01/07 and the balance of 58,750 divided into equal monthly installments thereafter such that the option shall be 100% vested on 03/01/11.
(6) When the ISO and NQ dated 03/01/2006 are combined for a total grant of 60,000 shares, the option shall vest and become exercisable as to 60,000 shares divided into equal monthly installments such that the option shall be 100% vested on 03/01/2010.
(7) When the ISO and NQ dated 09/15/04 are combined for a total grant of 110,000 shares, the option shall vest and become exercisable as to 27,500 shares on 09/07/05 and the balance of 82,500 divided into equal monthly installments thereafter such that the option shall be 100% vested on 09/07/08.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.