Document:

EX-10.15

 Exhibit 10.15 
 COMMUNITY FIRST BANK & TRUST 
 SUPPLEMENTAL EXECUTIVE RETIREMENT
PLAN 
 AMENDED AND RESTATED 
 PARTICIPATION AGREEMENT 
 THIS AMENDED AND RESTATED PARTICIPATION AGREEMENT
(the “Participation Agreement”) is entered into as of this 27 day of December, 2010, by and between Community First Bank & Trust (the “Employer”), and JAMES BRATTON, an
executive of the Employer (the “Participant”). 
 RECITALS: 

WHEREAS, the Employer has adopted the Plan (as defined below) effective as of August 16, 2005, as amended, and the Administrator has
determined that the Participant shall be eligible to participate in the Plan on the terms and conditions set forth in this Participation Agreement and the Plan; and 
 WHEREAS, the Employer and Participant entered into a Participation Agreement, dated September 1, 2005 (the “Original Participation Agreement”) which provided for the Participant’s
participation in the Plan; and 
 WHEREAS, the Employer and Participant desire to provide additional clarity to the Original
Participation Agreement through the inclusion of correctional language surrounding concepts of vesting and the Participant’s ability to receive a benefit related to his Early Retirement; and 

WHEREAS, the Original Participation Agreement provides for the amending of the Original Participation Agreement through a duly executed
instrument in writing signed by the Employer and the Participant; and 
 WHEREAS, the Employer and Participant desire to have
this signed Participation Agreement act as a clarification through amendment of the Original Participation Agreement by a duly executed written instrument signed by the Employer and the Participant. 

NOW, THEREFORE, in consideration of the foregoing and the agreements and covenants set forth herein, the parties agree as follows:

 1. Definitions. Except as otherwise provided, or unless the context otherwise requires, the terms used in this
Participation Agreement shall have the same meanings as set forth in the Plan. 
 2. Plan. Plan means the Community First
Bank & Trust Supplemental Executive Retirement Plan, effective as of August 16, 2005, as amended, as the same may be altered or supplemented in any validly executed Participation Agreement. 

3. Incorporation of Plan. The Plan, a copy of which is attached hereto as Exhibit A, is hereby incorporated into this
Participation Agreement as if fully set forth herein and the parties hereby agree to be bound by all of the terms and provisions contained in the Plan. The Participant hereby acknowledges receipt of a copy of the Plan and, subject to the foregoing,
confirms his understanding and acceptance of all of the terms and conditions contained therein. 
  

 4. Effective Date of Participation. The effective date of the Participant’s
participation in the Plan shall be September 1, 2005 (the “Participation Date”). 
 5. Normal Retirement
Age. The Participant’s Normal Retirement Age for purposes of the Plan and this Participation Agreement is age sixty-five (65). 
 6. Year of Service. A Participant’s “Years of Service” shall be measured by employment during a twelve (12) month period commencing on the Participant’s date of hire and
anniversaries thereof, whether such employment began before or after the Participation Date. 
 7. Prohibition Against
Funding. Should any investment be acquired in connection with the liabilities assumed under the Plan and this Participation Agreement, it is expressly understood and agreed that the Participants and Beneficiaries shall not have any right with
respect to, or claim against, such assets nor shall any such purchase be construed to create a trust of any kind or a fiduciary relationship between the Employer and the Participants, their Beneficiaries, or any other person. Any such assets shall
be and remain a part of the general, unpledged, unrestricted assets of the Employer, subject to the claims of its general creditors. It is the express intention of the parties hereto that this arrangement shall be unfunded for tax purposes and for
purposes of Title I of ERISA. The Participant shall be required to look to the provisions of the Plan and to the Employer itself for enforcement of any and all benefits due under this Participation Agreement, and, to the extent the Participant
acquires a right to receive payment under the Plan and this Participation Agreement, such right shall be no greater than the right of any unsecured general creditor of the Employer. The Employer shall be designated the owner and beneficiary of any
investment acquired in connection with its obligation under the Plan and this Participation Agreement. 
 8. Provisions
Related to SERP Benefit. 
 (a) SERP Benefit. Subject to the vesting schedule as provided for herein below, the SERP
Benefit for the Participant shall be an annual benefit of twenty-five percent (25%) of Participant’s average final base salary over the immediately preceding full twenty-four (24) calendar months prior to the Participant’s
Termination of Employment (upon Normal Retirement, Early Retirement or other Termination of Employment other than termination for Cause, pursuant to which benefits are payable hereunder). Participant’s base salary calculation shall be provided
by Employer’s payroll department. 
 (b) Normal Retirement Vesting. Participant shall vest in his SERP Benefit based
on the following schedule: 
  

					
	 Participant’s
 Years of Service
	  	Percentage (%) vested in
Participant’s SERP Benefit	 
	 1-10
	  	 	0	% 
	 11
	  	 	20	% 
	 12
	  	 	40	% 
	 13
	  	 	60	% 
	 14
	  	 	80	% 
	 15
	  	 	100	% 

 (c) Early Retirement Vesting. Notwithstanding anything to the contrary contained
herein, in the event Participant has attained sixty (60) years of age and has completed fifteen (15) Years of Service prior to his Termination of Employment, Participant shall become one-hundred percent (100%) vested in his SERP
Benefit and eligible for a SERP Benefit distribution pursuant to Participant’s Early Retirement. For purposes of the Plan and this Participation Agreement, Early Retirement shall mean Participant’s voluntary Termination of Employment,
subsequent to the satisfying the Early Retirement requirements contained herein, prior to Participant’s attainment of Normal Retirement Age. 
 (d) Change of Control. Participant shall be one hundred percent (100%) vested in his SERP Benefit upon a Change of Control, as provided for herein. Upon a Change of Control (as defined in the
Plan and as is consistent with Section 1.409A-3(i)(5) of the Regulations), the payment of Participant’s SERP Benefit determined hereunder, shall not be distributed to Participant or his Beneficiary until the Participant’s Termination
of Employment from the Employer. Subject to the restrictions of Section 4.3 of the Plan, upon Participant’s Termination of Employment within two (2) years after a Change of Control (other than by Normal Retirement or Early
Retirement), the present value (as of the date of the Termination of Employment and using the discount rate specified in Code Section 1274 in effect at the time of Participant’s Termination of Employment; discounted back from the
Participant’s Normal Retirement Age) of the Participant’s aggregate SERP Benefit shall be paid out in a lump sum distribution to the Participant, or his Beneficiary, as soon as administratively feasible following Participant’s
Termination of Employment, but no later than ninety (90) days, following such Termination of Employment. Notwithstanding the foregoing, if the Participant’s Termination of Employment occurs after two (2) years following a Change of
Control (other than upon Normal Retirement or Early Retirement), the Participant’s SERP Benefit shall be paid in accordance with Section 8(e) below. 
 (e) Form of SERP Benefit Payment. Subject to the restrictions of Section 4.3 of the Plan, the annual SERP Benefit (other than in connection with Participant’s death, Disability or
Termination of Employment within two (2) years following a Change of Control) shall be paid each year in equal monthly installments as of the first day of each calendar month and shall be paid for ten (10) years following the
Participant’s Normal Retirement, Early Retirement or Termination of Employment occurring more than two (2) years following a Change of Control, as applicable. 
 (f) Post Retirement Death Benefit. Participant’s SERP Benefit shall be payable for ten (10) years. In the event Participant dies during the ten (10) year SERP Benefit distribution
period, Participant’s Beneficiary, as designated pursuant to this Participation Agreement, will receive the present value of the remaining SERP Benefit distributions in a lump sum. For purposes of this Participation Agreement, the present value
of the remaining SERP Benefit shall be calculated based on the discount rate found in Code Section 1274, in effect at the time of Participant’s death; discounted back from the Participant’s Normal Retirement Age. Such distribution
under this subsection shall occur as soon as administratively feasible following Participant’s death, but no later than ninety (90) days following such death. 
 (g) Pre-Retirement Death Benefit Distribution. In the event of Participant’s death prior to Normal Retirement, such Participant’s Beneficiary(ies) shall be entitled to a Pre-Retirement
Death Benefit equal to the present value of the aggregate SERP Benefit payments, irrespective of any vesting provisions herein. This Pre-Retirement Death Benefit shall be distributed to Participant’s

 
Beneficiary(ies) in a lump sum amount as soon as administratively feasible following the Participant’s death, but no later than ninety (90) days following such death. For purposes of
this Agreement, the present value of the SERP Benefit shall be calculated based on the discount rate found in Code Section 1274, in effect at the time of Participant’s death; discounted back from the Participant’s Normal Retirement
Age. 
 (h) Disability. The Participant shall be one hundred percent (100%) vested in his Accrued SERP Benefit (as
calculated in accordance with the vesting schedule provided in Section 8(b) above) upon his Disability, as provided for herein. For purposes of the Plan and this Participation Agreement, a Participant shall be considered disabled if the
Participant is, by reason of any medically determinable physical or mental impairment which can be expected to result in death or can be expected to last for a continuous period of not less than twelve (12) months, receiving income replacement
benefits for a period of not less than three (3) months under an accident and health plan covering employees of the Employer. Subject to the restrictions found in Plan Section 4.3, Distributions to Specified Employees (to the extent
applicable), the Participant’s Accrued SERP Benefit upon Participant’s Disability under this subsection shall be distributed to Participant as soon as administratively feasible, but no later than ninety (90) days following
Participant’s Disability, in a single lump sum. 
 (i) Non-Compete Agreement. Notwithstanding anything contrary
contained herein, Participant acknowledges and agrees with the Employer that Participant’s services to the Employer are unique in nature and that the Employer would be irreparably damaged if Participant were to provide similar services to any
person or entity competing with the Employer. Participant accordingly covenants and agrees that for a period commencing on the date of this Agreement and ending one (1) year after he ceases to be employed by the Employer, Participant will not
directly or indirectly own, operate, manage, control, participate in, consult with, render for service, be employed by or assist in any way any entity within thirty (30) miles of any Employer affiliated office which is competitive with the
Employer. For purposes hereof, an entity shall be considered to be “competing with” or “competitive with” the Employer if its core business is in the banking and/or financial services industry. In the event of Participant’s
violation of this non-compete agreement, the Participant shall immediately forfeit all benefits associated with Participant’s participation in the Plan and this Participation Agreement back to the Employer. 

9. General Provisions 
 (a) No Assignment. No benefit under the Participation Agreement shall be subject in any manner to anticipation, alienation, sale, transfer, assignment, pledge, encumbrance, or charge, and any such
action shall be void for all purposes of the Participation Agreement. No benefit shall in any manner be subject to the debts, contracts, liabilities, engagements, or torts of any person, nor shall it be subject to attachments or other legal process
for or against any person, except to such extent as may be required by law. 
 (b) Headings. The headings contained in
the Participation Agreement are inserted only as a matter of convenience and for reference and in no way define, limit, enlarge, or describe the scope or intent of this Plan nor in any way shall they affect this Participation Agreement or the
construction of any provision thereof. 

 (c) Terms. Capitalized terms shall have meanings as defined herein. Singular nouns
shall be read as plural, masculine pronouns shall be read as feminine, and vice versa, as appropriate. 
 (d) Successors.
This Participation Agreement shall be binding upon each of the parties and shall also be binding upon their respective successors the Employer’s assigns. 
 (e) Amendments. This Participant Agreement may not be modified or amended except by a duly executed instrument in writing signed by the Employer and the Participant. 

(f) Payment Periods. For the avoidance of doubt, any payment due under this Participation Agreement within a period following
Participant’s Termination of Employment, death, Disability or other event, shall be made on a date during such period as determined by the Employer in its sole discretion. 

(g) Section 409A. It is intended that this Participation Agreement and the Plan shall comply with the provisions of Code
Section 409A and the Regulations relating thereto so as not to subject Participant to the payment of additional taxes and interest under Code Section 409A. In furtherance of this intent, this Participation Agreement and the Plan shall be
interpreted, operated, and administered in a manner consistent with these intentions. 
 IN WITNESS WHEREOF, each of the parties has caused this
Participation Agreement to be executed as of the day first above written. 
  

							
	 PARTICIPANT:
	 		 	COMMUNITY FIRST BANK & TRUST:
				
	James Bratton	 		 	By:	 	

				
	/s/ James Bratton	 		 		 	
	Signature of Participant	 		 	Title:	 	President & CFO
			
	ATTESTED:	 		 	ATTESTED:
				
	By:          

	 		 	By:	 	

				
	Title: CFO	 		 	Title:	 	ControllerEX-10.3

 Exhibit 10.3 
 CYTOKINETICS, INCORPORATED 
 2004 EMPLOYEE STOCK PURCHASE PLAN

 (As amended by the Board of Directors on March 15, 2006 and approved by the Stockholders May 25, 2006, as
amended by the Board of Directors on July 19, 2006, January 17, 2007, May 19, 2011 and May 23, 2012) 
 The following constitutes the provisions of the 2004 Employee Stock Purchase Plan of Cytokinetics, Incorporated: 
 1. Purpose. The purpose of the Plan is to provide Employees with an opportunity to purchase Common Stock through accumulated payroll deductions. It is the intention of the Company to have the Plan
qualify as an “employee stock purchase plan” under Section 423 of the Code. The provisions of the Plan, accordingly, shall be construed so as to extend and limit Plan participation in a manner that is consistent with the requirements
of that section of the Code. 
 2. Definitions. 

(a) “Administrator” means the Board or any committee thereof designated by the Board in accordance with
Section 14. 
 (b) “Board” means the Board of Directors of the Company. 

(c) “Change of Control” means the occurrence of any of the following events: 

(i) Any “person” (as such term is used in Sections 13(d) and 14(d) of the Exchange Act) becomes
the “beneficial owner” (as defined in Rule 13d-3 of the Exchange Act), directly or indirectly, of securities of the Company representing fifty percent (50%) or more of the total voting power represented by the Company’s then
outstanding voting securities; or 
 (ii) The consummation of the sale or disposition by the
Company of all or substantially all of the Company’s assets; or 
 (iii) The consummation
of a merger or consolidation of the Company, with any other corporation, other than a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into voting securities of the surviving entity or its parent) at least fifty percent (50%) of the total voting power represented by the voting securities of the Company, or such surviving entity or
its parent outstanding immediately after such merger or consolidation. 
 (iv) A change in the
composition of the Board, as a result of which fewer than a majority of the Directors are Incumbent Directors. “Incumbent Directors” means Directors who either (A) are Directors as of the effective date of the Plan (pursuant to
Section 23), or (B) are elected, or nominated for election, to the Board with the affirmative votes of at least a majority of those Directors whose election or nomination was not in connection with any transaction described 

 in subsections (i), (ii) or (iii) or in connection with an actual
or threatened proxy contest relating to the election of Directors of the Company. 
 (d) “Code”
means the Internal Revenue Code of 1986, as amended. Any reference to a section of the Code herein shall be a reference to any successor or amended section of the Code. 

(e) “Common Stock” means the common stock of the Company. 

(f) “Company” means Cytokinetics, Incorporated, a Delaware corporation. 

(g) “Compensation” means an Employee’s base straight time gross earnings, commissions (to the
extent such commissions are an integral, recurring part of compensation), overtime and shift premium, but exclusive of payments for incentive compensation, bonuses and other compensation. 

(h) “Designated Subsidiary” means any Subsidiary that has been designated by the Administrator from time
to time in its sole discretion as eligible to participate in the Plan. 
 (i) “Director” means
a member of the Board. 
 (j) “Employee” means any individual who is a
common law employee of an Employer and is customarily employed for more than twenty (20) hours per week and more than five (5) months in any calendar year by the Employer. For purposes of the Plan, the employment relationship shall be
treated as continuing intact while the individual is on sick leave or other leave of absence approved by the Employer. Where the period of leave exceeds ninety (90) days and the individual’s right to reemployment is not guaranteed either
by statute or by contract, the employment relationship shall be deemed to have terminated on the 91st day of such leave. 
 (k) “Employer” means any
one or all of the Company and its Designated Subsidiaries. 
 (l) “Enrollment Date” means the
first Trading Day of each Offering Period. 
 (m) “Exchange Act” means the Securities Exchange
Act of 1934, as amended, including the rules and regulations promulgated thereunder. 
 (n) “Exercise
Date” means April 30 and October 31 of each year or, if such date is not a Trading Day, then the first Trading Day occurring immediately prior to such date. The first Exercise Date under the Plan shall be November 1, 2004.

 (o) “Fair Market Value” means, as of any date, the value of Common Stock determined as
follows: 
 (i) If the Common Stock is listed on any established stock exchange or a national
market system, including without limitation the Nasdaq National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its Fair Market Value shall be the closing sales price for the Common Stock (or the closing bid, if no sales were
reported) as quoted on such exchange or 

  
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system on the date of determination, as reported in The Wall Street Journal or such other source as the Administrator deems reliable, or; 

(ii) If the Common Stock is regularly quoted by a recognized securities dealer but selling prices are not
reported, its Fair Market Value shall be the mean of the closing bid and asked prices for the Common Stock on the date of determination, as reported in The Wall Street Journal or such other source as the Administrator deems reliable, or;

 (iii) In the absence of an established market for the Common Stock, its Fair Market Value
shall be determined in good faith by the Administrator, or; 
 (iv) For purposes of the
Enrollment Date of the first Offering Period under the Plan, the Fair Market Value shall be the initial price to the public as set forth in the final prospectus deemed to be included within the registration statement on Form S-1 filed with the
Securities and Exchange Commission for the initial public offering of the Common Stock (the “Registration Statement”). 
 (p) “Offering Periods” means the periods of approximately twenty-four (24) months during which an option granted pursuant to the Plan may be exercised, commencing on May 1 and
November 1 of each year (provided that if such date is not a Trading Day, such Offering Period will commence on the first Trading Day occurring after such date), and terminating on the April 30 or October 31 occurring approximately 24
months thereafter, respectively (provided that if such date is not a Trading Day, such Offering Period will terminate on the first Trading Day occurring immediately prior to such date). Notwithstanding the foregoing, the first Offering Period under
the Plan shall commence with the first Trading Day on or after the date on which the Securities and Exchange Commission declares the Company’s Registration Statement effective and ending on the first Trading Day on or after the earlier of
(i) May 1, 2006 or (ii) twenty-seven (27) months from the beginning of the first Offering Period; and provided, further, that the second Offering Period under the Plan shall commence on November 1, 2004. The duration and
timing of Offering Periods may be changed pursuant to Section 4 of this Plan. 
 (q)
“Parent” means a “parent corporation,” whether now or hereafter existing, as defined in Section 424(e) of the Code. 
 (r) “Plan” means this 2004 Employee Stock Purchase Plan, as amended. 
 (s) “Purchase Period” means the approximately six (6) month period commencing on one Exercise Date and ending with the next Exercise Date, except that the first Purchase Period of
any Offering Period shall commence on the Enrollment Date and end with the next Exercise Date. 
 (t)
“Purchase Price” means an amount equal to eighty-five percent (85%) of the Fair Market Value of a share of Common Stock on the Enrollment Date or on the Exercise Date, whichever is lower; provided however, that the Purchase
Price may be adjusted by the Administrator pursuant to Section 20. 
 (u) “Subsidiary”
means a “subsidiary corporation,” whether now or hereafter existing, as defined in Section 424(f) of the Code. 

  
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 (v) “Trading Day” means a day on which the U.S. national
stock exchanges and the Nasdaq System are open for trading. 
 3. Eligibility. 

(a) First Offering Period. Any individual who is an Employee immediately prior to the first Offering Period under
the Plan shall be automatically enrolled in the first Offering Period. 
 (b) Subsequent Offering
Periods. Any individual who is an Employee as of the Enrollment Date of any future Offering Period shall be eligible to participate in such Offering Period, subject to the requirements of Section 5. 

(c) Limitations. Any provisions of the Plan to the contrary notwithstanding, no Employee shall be granted an
option under the Plan (i) to the extent that, immediately after the grant, such Employee (or any other person whose stock would be attributed to such Employee pursuant to Section 424(d) of the Code) would own capital stock of the Company
or any Parent or Subsidiary of the Company and/or hold outstanding options to purchase such stock possessing five percent (5%) or more of the total combined voting power or value of all classes of the capital stock of the Company or of any
Parent or Subsidiary of the Company, or (ii) to the extent that his or her rights to purchase stock under all employee stock purchase plans (as defined in Section 423 of the Code) of the Company or any Parent or Subsidiary of the Company
accrues at a rate which exceeds twenty-five thousand dollars ($25,000) worth of stock (determined at the Fair Market Value of the stock on the Enrollment Date of the Offering Period) for each calendar year in which such option is outstanding at any
time. 
 4. Offering Periods. The Plan shall be implemented by consecutive, overlapping Offering Periods with a new
Offering Period commencing on the first Trading Day on or after May 1 and November 1 of each year, or on such other date as the Administrator shall determine, and continuing thereafter until terminated in accordance with Section 20;
provided, however, that the first Offering Period under the Plan shall commence with the first Trading Day on or after the date on which the Securities and Exchange Commission declares the Company’s Registration Statement effective and ending
on the first Trading Day on or after the earlier of (i) May 1, 2006 or (ii) twenty-seven (27) months from the beginning of the first Offering Period; and provided, further, that the second Offering Period under the Plan shall
commence on November 1, 2004. The Administrator shall have the power to change the duration of Offering Periods (including the commencement dates thereof) with respect to future offerings without stockholder approval if such change is announced
prior to the scheduled beginning of the first Offering Period to be affected thereafter. 
 5. Participation. 

(a) First Offering Period. An Employee who has become a participant in the first Offering Period under the Plan
pursuant to Section 3(a) shall be entitled to continue his or her participation in such Offering Period only if he or she submits to the Company’s payroll office (or its designee) a properly completed subscription agreement authorizing
payroll deductions in the form provided by the Administrator for such purpose (i) no earlier than the effective date of the filing of the Company’s Registration Statement on Form S-8 with respect to the shares of Common Stock issuable
under the Plan (the “Effective Date”) and (ii) no later than five (5) business days from the 

  
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Effective Date or such other period of time as the Administrator may determine (the “Enrollment Window”). A participant’s failure to submit the subscription agreement during the
Enrollment Window pursuant to this Section 5(a) shall result in the automatic termination of his or her participation in the first Offering Period under the Plan. 

(b) Subsequent Offering Periods. An Employee who is eligible to participate in the Plan pursuant to
Section 3(b) may become a participant by (i) submitting to the Company’s payroll office (or its designee), on or before a date prescribed by the Administrator prior to an applicable Enrollment Date, a properly completed subscription
agreement authorizing payroll deductions in the form provided by the Administrator for such purpose, or (ii) following an electronic or other enrollment procedure prescribed by the Administrator. 

6. Payroll Deductions. 
 (a) At the time a participant enrolls in the Plan pursuant to Section 5, he or she shall elect to have payroll deductions made on each payday during the Offering Period in an amount not exceeding 15%
of the Compensation which he or she receives on each such payday. Effective for Purchase Periods and Offering Periods commencing on or after November 1, 2006, eligible Employees who wish to enroll in the Plan, and participants then
participating in the Plan who are subscribing at a rate of 0% of Compensation, may elect prior to the commencement of a Purchase Period or Offering Period, as applicable, to have payroll deductions made on each payday during the Offering Period in
an amount not to exceed 15% of Compensation, but with a minimum contribution rate of 1% of Compensation, subject to Sections 3(c) and 6(e). Effective only for Offering Periods commencing on or after November 1, 2012, a participant may elect
prior to the commencement of an Offering Period (or a Purchase Period within such an Offering Period, as applicable) to have payroll deductions made on each payday during the Offering Period in an amount not to exceed 15% of Compensation, but with a
minimum contribution rate of 0.1% of Compensation, subject to Sections 3(c) and 6(e). Participants will not be permitted to subscribe at a rate of 0% of Compensation, except as required by Sections 3(c) and 6(e). 

(b) Payroll deductions authorized by a participant shall commence on the first payday following the Enrollment Date and
shall end on the last payday in the Offering Period to which such authorization is applicable, unless sooner terminated by the participant as provided in Section 10; provided, however, that for the first Offering Period under the Plan, payroll
deductions shall commence on the first payday on or following the end of the Enrollment Window. 
 (c) All
payroll deductions made for a participant shall be credited to his or her account under the Plan. A participant may not make any additional payments into such account. 

(d) A participant may discontinue his or her participation in the Plan as provided in Section 10, or may change the
rate of his or her payroll deductions during the Offering Period by (i) properly completing and submitting to the Company’s payroll office (or its designee), on or before a date prescribed by the Administrator prior to an applicable
Exercise Date, a new subscription agreement authorizing the change in payroll deduction rate in the form provided by the Administrator for such purpose, or (ii) following an electronic or other procedure prescribed by the Administrator;
provided, however, that a participant may only make one payroll deduction change during each Purchase Period. If a participant has not followed such procedures to change the rate of 

  
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payroll deductions, the rate of his or her payroll deductions shall continue at the originally elected rate throughout the Offering Period and future Offering Periods (unless terminated as
provided in Section 10). The Administrator may, in its sole discretion, limit the nature and/or number of payroll deduction rate changes that may be made by participants during any Offering Period. Any change in payroll deduction rate made
pursuant to this Section 6(d) shall be effective as of the first full payroll period following five (5) business days after the date on which the change is made by the participant (unless the Administrator, in its sole discretion, elects
to process a given change in payroll deduction rate more quickly). Effective for Purchase Periods and the Offering Periods commencing on or after November 1, 2006, a subscription agreement authorizing a decrease in the rate of payroll
deductions may be submitted at any time during a Purchase Period, but a subscription agreement authorizing an increase in the rate of payroll deductions must be, and will only be processed if it is, received by the Company’s payroll office (or
its designee) at least five (5) days prior to the commencement of a Purchase Period to which it relates. A subscription agreement authorizing an increase in the rate of payroll deductions will not be processed and will have no effect after the
commencement of a Purchase Period to which it relates. 
 (e) Notwithstanding the foregoing, to the extent
necessary to comply with Section 423(b)(8) of the Code and Section 3(c), or if the Administrator reasonably anticipates a participant has contributed a sufficient amount to purchase a number of shares of Common Stock equal to or in excess
of the applicable limit for such Purchase or Offering Period (as set forth in Section 7 or as established by the Administrator), a participant’s payroll deductions may be decreased to zero percent (0%) at any time during a Purchase Period.
Subject to Section 423(b)(8) of the Code and Section 3(c) hereof, payroll deductions will recommence at the rate originally elected by the participant effective as of the beginning of the first Purchase Period which is scheduled to end in
the following calendar year, or, for participants who have had their contributions reduced due to the applicable limits on the maximum number of shares that may be purchased in any Purchase or Offering Period, the immediately following Purchase
Period, unless terminated by the participant as provided in Section 10. 
 (f) At the time the option is
exercised, in whole or in part, or at the time some or all of the Company’s Common Stock issued under the Plan is disposed of, the participant must make adequate provision for the Company’s federal, state, or other tax withholding
obligations, if any, which arise upon the exercise of the option or the disposition of the Common Stock. At any time, the Company may, but shall not be obligated to, withhold from the participant’s compensation the amount necessary for the
Company to meet applicable withholding obligations, including any withholding required to make available to the Company any tax deductions or benefits attributable to the sale or early disposition of Common Stock by the Employee. 

7. Grant of Option. On the Enrollment Date of each Offering Period, each Employee participating in such Offering Period shall be
granted an option to purchase on each Exercise Date during such Offering Period (at the applicable Purchase Price) up to a number of shares of Common Stock determined by dividing such participant’s payroll deductions accumulated prior to such
Exercise Date and retained in the participant’s account as of the Exercise Date by the applicable Purchase Price; provided that in no event shall a participant be permitted to purchase during each Purchase Period more than 1,250 shares of
Common Stock (subject to any adjustment pursuant to Section 19), and provided further that such purchase shall be subject to the limitations set forth in Sections 3(c) and 13. The Employee may accept the grant of such option (i) with
respect to the first 

  
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Offering Period under the Plan, by submitting a properly completed subscription agreement in accordance with the requirements of Section 5(a) on or before the last day of the Enrollment
Window, and (ii) with respect to any future Offering Period under the Plan, by electing to participate in the Plan in accordance with the requirements of Section 5(b). The Administrator may, for future Offering Periods, increase or
decrease, in its absolute discretion, the maximum number of shares of Common Stock that a participant may purchase during each Purchase Period of such Offering Period. Exercise of the option shall occur as provided in Section 8, unless the
participant has withdrawn pursuant to Section 10. The option shall expire on the last day of the Offering Period. 
 8.
Exercise of Option. 
 (a) Unless a participant withdraws from the Plan as provided in Section 10,
his or her option for the purchase of shares of Common Stock shall be exercised automatically on the Exercise Date, and the maximum number of full shares subject to option shall be purchased for such participant at the applicable Purchase Price with
the accumulated payroll deductions in his or her account. No fractional shares of Common Stock shall be purchased; any payroll deductions accumulated in a participant’s account which are not sufficient to purchase a full share shall be retained
in the participant’s account for the subsequent Purchase Period or Offering Period, subject to earlier withdrawal by the participant as provided in Section 10. Any other monies left over in a participant’s account after the Exercise
Date shall be returned to the participant. During a participant’s lifetime, a participant’s option to purchase shares hereunder is exercisable only by him or her. 

(b) Notwithstanding any contrary Plan provision, if the Administrator determines that, on a given Exercise Date, the
number of shares of Common Stock with respect to which options are to be exercised may exceed (i) the number of shares of Common Stock that were available for sale under the Plan on the Enrollment Date of the applicable Offering Period, or
(ii) the number of shares of Common Stock available for sale under the Plan on such Exercise Date, the Administrator may in its sole discretion (x) provide that the Company shall make a pro rata allocation of the shares of Common Stock
available for purchase on such Enrollment Date or Exercise Date, as applicable, in as uniform a manner as shall be practicable and as it shall determine in its sole discretion to be equitable among all participants exercising options to purchase
Common Stock on such Exercise Date, and continue all Offering Periods then in effect, or (y) provide that the Company shall make a pro rata allocation of the shares of Common Stock available for purchase on such Enrollment Date or Exercise
Date, as applicable, in as uniform a manner as shall be practicable and as it shall determine in its sole discretion to be equitable among all participants exercising options to purchase Common Stock on such Exercise Date, and terminate any or all
Offering Periods then in effect pursuant to Section 20. The Company may make pro rata allocation of the shares of Common Stock available on the Enrollment Date of any applicable Offering Period pursuant to the preceding sentence,
notwithstanding any authorization of additional shares of Common Stock for issuance under the Plan by the Company’s shareholders subsequent to such Enrollment Date. 
 9. Delivery. As soon as administratively practicable after each Exercise Date on which a purchase of shares of Common Stock occurs, the Company shall arrange the delivery to each participant, as
appropriate, the shares purchased upon exercise of his or her option in a form determined by the Administrator (in its sole discretion) and pursuant to rules established by the Administrator. No participant shall have any voting, dividend, or other
shareholder rights with 

  
 -7-

 
respect to shares of Common Stock subject to any option granted under the Plan until such shares have been purchased and delivered to the participant as provided in this Section 9.

 10. Withdrawal. 
 (a) Under procedures established by the Administrator, a participant may withdraw all but not less than all the payroll deductions credited to his or her account and not yet used to exercise his or her
option under the Plan at any time by (i) submitting to the Company’s payroll office (or its designee) a written notice of withdrawal in the form prescribed by the Administrator for such purpose, or (ii) following an electronic or
other withdrawal procedure prescribed by the Administrator. All of the participant’s payroll deductions credited to his or her account shall be paid to such participant as promptly as practicable after the effective date of his or her
withdrawal and such participant’s option for the Offering Period shall be automatically terminated, and no further payroll deductions for the purchase of shares shall be made for such Offering Period. If a participant withdraws from an Offering
Period, payroll deductions shall not resume at the beginning of the succeeding Offering Period unless the participant re-enrolls in the Plan in accordance with the provisions of Section 5. 

(b) A participant’s withdrawal from an Offering Period shall not have any effect upon his or her eligibility to
participate in any similar plan which may hereafter be adopted by the Company or in succeeding Offering Periods which commence after the termination of the Offering Period from which the participant withdraws. 

11. Termination of Employment. Upon a participant’s ceasing to be an Employee, for any reason, he or she shall be deemed to
have elected to withdraw from the Plan and the payroll deductions credited to such participant’s account during the Offering Period but not yet used to purchase shares of Common Stock under the Plan shall be returned to such participant or, in
the case of his or her death, to the person or persons entitled thereto under Section 15, and such participant’s option shall be automatically terminated. The preceding sentence notwithstanding, a participant who receives payment in lieu
of notice of termination of employment shall be treated as continuing to be an Employee for the participant’s customary number of hours per week of employment during the period in which the participant is subject to such payment in lieu of
notice. 
 12. Interest. No interest shall accrue on the payroll deductions of a participant in the Plan. 

13. Stock. 
 (a) Subject to adjustment upon changes in capitalization of the Company as provided in Section 19, the maximum number of shares of Common Stock which shall be made available for sale under the Plan
shall be 1,500,000 shares of Common Stock. 
 (b) Shares of Common Stock to be delivered to a participant under
the Plan shall be registered in the name of the participant or in the name of the participant and his or her spouse. 
 14.
Administration. The Board or a committee of members of the Board who shall be appointed from time to time by, and shall serve at the pleasure of, the Board, shall administer the Plan. The Administrator shall have full and exclusive
discretionary authority to construe, interpret and apply the terms of the Plan, to determine eligibility, to adjudicate all disputed claims filed under 

  
 -8-

 
the Plan and to establish such procedures that it deems necessary for administration of the Plan (including, without limitation, to adopt such procedures and sub-plans as are necessary or
appropriate to permit the participation in the Plan by employees who are foreign nationals or employed outside the United States). The Administrator, in its sole discretion and on such terms and conditions as it may provide, may delegate to one or
more individuals all or any part of its authority and powers under the Plan. Every finding, decision and determination made by the Administrator (or its designee) shall, to the full extent permitted by law, be final and binding upon all parties.

 15. Designation of Beneficiary. 

(a) A participant may designate a beneficiary who is to receive any shares of Common Stock and cash, if any, from the
participant’s account under the Plan in the event of such participant’s death subsequent to an Exercise Date on which the option is exercised but prior to delivery to such participant of such shares and cash. In addition, a participant may
designate a beneficiary who is to receive any cash from the participant’s account under the Plan in the event of such participant’s death prior to exercise of the option. If a participant is married and the designated beneficiary is not
the spouse, spousal consent shall be required for such designation to be effective. 
 (b) Such designation of
beneficiary may be changed by the participant at any time. In the event of the death of a participant and in the absence of a beneficiary validly designated under the Plan who is living at the time of such participant’s death, the Company shall
deliver such shares and/or cash to the executor or administrator of the estate of the participant, or if no such executor or administrator has been appointed (to the knowledge of the Company), the Company, in its discretion, may deliver such shares
and/or cash to the spouse or to any one or more dependents or relatives of the participant, or if no spouse, dependent or relative is known to the Company, then to such other person as the Company may designate. 

(c) All beneficiary designations under this Section 15 shall be made in such form and manner as the Administrator
may prescribe from time to time. 
 16. Transferability. Neither payroll deductions credited to a participant’s
account nor any rights with regard to the exercise of an option or to receive shares of Common Stock under the Plan may be assigned, transferred, pledged or otherwise disposed of in any way (other than by will, the laws of descent and distribution
or as provided in Section 15) by the participant. Any such attempt at assignment, transfer, pledge or other disposition shall be without effect, except that the Company may treat such act as an election to withdraw from an Offering Period in
accordance with Section 10. 
 17. Use of Funds. All payroll deductions received or held by the Company under the
Plan may be used by the Company for any corporate purpose, and the Company shall not be obligated to segregate such payroll deductions. Until shares of Common Stock are issued under the Plan (as evidenced by the appropriate entry on the books of the
Company or of a duly authorized transfer agent of the Company), a participant shall only have the rights of an unsecured creditor with respect to such shares. 
 18. Reports. Individual accounts shall be maintained for each participant in the Plan. Statements of account shall be given to participating Employees at least annually, which statements

  
 -9-

 
shall set forth the amounts of payroll deductions, the Purchase Price, the number of shares of Common Stock purchased and the remaining cash balance, if any. 

19. Adjustments, Dissolution, Liquidation or Change of Control. 

(a) Adjustments. In the event that any dividend or other distribution (whether in the form of cash, Common Stock,
other securities, or other property), recapitalization, stock split, reverse stock split, reorganization, merger, consolidation, split-up, spin-off, combination, repurchase, or exchange of Common Stock or other securities of the Company, or other
change in the corporate structure of the Company affecting the Common Stock the Administrator, in order to prevent dilution or enlargement of the benefits or potential benefits intended to be made available under the Plan, shall, in such manner as
it may deem equitable, adjust the number and class of Common Stock which may be delivered under the Plan, the Purchase Price per share and the number of shares of Common Stock covered by each option under the Plan which has not yet been exercised,
and the numerical limits of Sections 7 and 13. 
 (b) Dissolution or Liquidation. In the event of the
proposed dissolution or liquidation of the Company, the Offering Period then in progress shall be shortened by setting a new Exercise Date (the “New Exercise Date”), and shall terminate immediately prior to the consummation of such
proposed dissolution or liquidation, unless provided otherwise by the Board. The New Exercise Date shall be before the date of the Company’s proposed dissolution or liquidation. The Board shall notify each participant in writing, at least ten
(10) business days prior to the New Exercise Date, that the Exercise Date for the participant’s option has been changed to the New Exercise Date and that the participant’s option shall be exercised automatically on the New Exercise
Date, unless prior to such date the participant has withdrawn from the Offering Period as provided in Section 10. 
 (c) Change of Control. In the event of a Change of Control, each outstanding option shall be assumed or an equivalent option substituted by the successor corporation or a Parent or Subsidiary of
the successor corporation. In the event that the successor corporation refuses to assume or substitute for the option, any Purchase Periods then in progress shall be shortened by setting a new Exercise Date (the “New Exercise Date”) and
any Offering Periods then in progress shall end on the New Exercise Date. The New Exercise Date shall be before the date of the Company’s proposed Change of Control. The Board shall notify each participant in writing, at least ten
(10) business days prior to the New Exercise Date, that the Exercise Date for the participant’s option has been changed to the New Exercise Date and that the participant’s option shall be exercised automatically on the New Exercise
Date, unless prior to such date the participant has withdrawn from the Offering Period as provided in Section 10. 
 20.
Amendment or Termination. 
 (a) The Administrator may at any time and for any reason terminate or amend
the Plan. Except as provided in Section 19, no such termination can affect options previously granted under the Plan, provided that an Offering Period may be terminated by the Administrator on any Exercise Date if the Administrator determines
that the termination or suspension of the Plan is in the best interests of the Company and its stockholders. Except as provided in Section 19 and this Section 20, no amendment may make any change in any option theretofore granted which
adversely affects the rights of any participant. To the extent necessary to comply with Section 423 of the Code 

  
 -10-

 
(or any successor rule or provision or any other applicable law, regulation or stock exchange rule), the Company shall obtain stockholder approval in such a manner and to such a degree as
required. 
 (b) Without stockholder consent and without regard to whether any participant rights may be
considered to have been “adversely affected,” the Administrator shall be entitled to change the Offering Periods, limit the frequency and/or number of changes in the amount withheld during an Offering Period, establish the exchange ratio
applicable to amounts withheld in a currency other than U.S. dollars, permit payroll withholding in excess of the amount designated by a participant in order to adjust for delays or mistakes in the Company’s processing of properly completed
withholding elections, establish reasonable waiting and adjustment periods and/or accounting and crediting procedures to ensure that amounts applied toward the purchase of Common Stock for each participant properly correspond with amounts withheld
from the participant’s Compensation, and establish such other limitations or procedures as the Administrator determines in its sole discretion advisable which are consistent with the Plan. 

(c) In the event the Administrator determines that the ongoing operation of the Plan may result in unfavorable financial
accounting consequences, the Board may, in its discretion and, to the extent necessary or desirable, modify or amend the Plan to reduce or eliminate such accounting consequence including, but not limited to: 

(i) altering the Purchase Price for any Offering Period including an Offering Period underway at the time
of the change in Purchase Price; 
 (ii) shortening any Offering Period so that Offering Period
ends on a new Exercise Date, including an Offering Period underway at the time of the Board action; and 
 (iii) allocating shares. 
 Such modifications or amendments shall not require
stockholder approval or the consent of any Plan participants. 
 21. Notices. All notices or other communications by a
participant to the Company under or in connection with the Plan shall be deemed to have been duly given when received in the form specified by the Company at the location, or by the person, designated by the Company for the receipt thereof.

 22. Conditions Upon Issuance of Shares. Shares of Common Stock shall not be issued with respect to an option under the
Plan unless the exercise of such option and the issuance and delivery of such shares pursuant thereto shall comply with all applicable provisions of law, domestic or foreign, including, without limitation, the Securities Act of 1933, as amended,
including the rules and regulations promulgated thereunder, the Exchange Act and the requirements of any stock exchange upon which the shares may then be listed, and shall be further subject to the approval of counsel for the Company with respect to
such compliance. 
 As a condition to the exercise of an option, the Company may require the person exercising
such option to represent and warrant at the time of any such exercise that the shares are being purchased only for investment and without any present intention to sell or distribute such 

  
 -11-

 
shares if, in the opinion of counsel for the Company, such a representation is required by any of the aforementioned applicable provisions of law. 

23. Term of Plan. The Plan shall become effective upon the earlier to occur of its adoption by the Board or its approval by the
stockholders of the Company. It shall continue in effect until terminated under Section 20. 
 24. Automatic Transfer to
Low Price Offering Period. To the extent permitted by any applicable laws, regulations, or stock exchange rules if the Fair Market Value of the Common Stock on any Exercise Date in an Offering Period is lower than the Fair Market Value of the
Common Stock on the Enrollment Date of such Offering Period, then all participants in such Offering Period shall be automatically withdrawn from such Offering Period immediately after the exercise of their option on such Exercise Date and
automatically re-enrolled in the immediately following Offering Period. 

  
 -12-

 SAMPLE SUBSCRIPTION AGREEMENT 

CYTOKINETICS, INCORPORATED 
 2004 EMPLOYEE STOCK PURCHASE PLAN 
 SUBSCRIPTION AGREEMENT 

 

					
	 _____ Original Application
 _____ Change in Payroll Deduction Rate
 _____ Change of
Beneficiary(ies)
	 		 	Offering Date:___________

  

	1.	 ____________________ hereby elects to participate in the Cytokinetics, Incorporated 2004 Employee Stock Purchase Plan (the “Plan”) and
subscribes to purchase shares of the Company’s Common Stock in accordance with this Subscription Agreement and the Plan. Capitalized terms not otherwise defined herein will have the meanings given to them in the Plan.

  

	2.	 I hereby authorize payroll deductions from each paycheck in the amount of ____% of my Compensation on each payday (from 0.1% to 15%) during the
Offering Period in accordance with the Plan. I acknowledge and agree that I may not increase the payroll deduction rate for a Purchase Period after it has commenced and may only increase payroll deductions for future Purchase Periods in accordance
with the terms of the Plan or as otherwise determined by the Administrator. 

  

	3.	 I understand that said payroll deductions shall be accumulated for the purchase of shares of Common Stock at the applicable Purchase Price
determined in accordance with the Plan. I understand that if I do not withdraw from an Offering Period, any accumulated payroll deductions will be used to automatically exercise my option. 

 

	4.	 I have received a copy of the complete Plan. I understand that my participation in the Plan is in all respects subject to the terms of the Plan. I
understand that my ability to exercise the option under this Subscription Agreement is subject to shareholder approval of the Plan. 

  

	5.	 Shares of Common Stock purchased for me under the Plan should be issued in the name(s) of Employee or Employee and Spouse only.

  

	6.	 I understand that if I dispose of any shares received by me pursuant to the Plan within 2 years after the Offering Date (the first day of the
Offering Period during which I purchased such shares) or one year after the Exercise Date, I will be treated for federal income tax purposes as having received ordinary income at the time of such disposition in an amount equal to the excess of the
fair market value of the shares at the time such shares were purchased by me over the price which I paid for the shares. 

	 	 
I hereby agree to notify the Company in writing within 30 days after the date of any disposition of my shares and I will make adequate provision for Federal, state or other tax
withholding obligations, if any, which arise upon the disposition of the Common Stock. The Company may, but will not be obligated to, withhold from my compensation the amount necessary to meet any applicable withholding obligation including any
withholding necessary to make available to the Company any tax deductions or benefits attributable to sale or early disposition of Common Stock by me. If I dispose of such shares at any time after the expiration of the 2-year and 1-year holding
periods, I understand that I will be treated for federal income tax purposes as having received income only at the time of such disposition, and that such income will be taxed as ordinary income only to the extent of an amount equal to the lesser of
(1) the excess of the fair market value of the shares at the time of such disposition over the purchase price which I paid for the shares, or (2) 15% of the fair market value of the shares on the first day of the Offering Period. The
remainder of the gain, if any, recognized on such disposition will be taxed as capital gain. 

  

	7.	 I hereby agree to be bound by the terms of the Plan. The effectiveness of this Subscription Agreement is dependent upon my eligibility to
participate in the Plan. 

  

	8.	 In the event of my death, I hereby designate the following as my beneficiary(ies) to receive all payments and/or shares due me under the Plan:

  

							
	 NAME: (Please print)
	 	 	 	 	 	 
		 	(First)	 	(Middle)	 	(Last)

  

					
			
	 	 		 	 
	 Relationship
	 		 	
			
	 	 		 	 
	 Percentage Benefit
	 		 	 (Address)

  

							
	 NAME: (please print)
	 	 	 	 	 	 
		 	(First)	 	(Middle)	 	(Last)

  

					
			
	 	 		 	 
	 Relationship
	 		 	
			
	 	 		 	 
	 Percentage of Benefit
	 		 	 (Address)

  
 -2-

					
			
	 Employee’s Social
Security Number:
	  	 	  	
			
	Employee’s Address:	  	 	  	
			
		  	 	  	
			
		  	 	  	

 I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT SHALL REMAIN IN EFFECT THROUGHOUT SUCCESSIVE OFFERING
PERIODS UNLESS TERMINATED BY ME. 
  

					
		 		 	
			
	 Dated:_________________________
	 		 	 
		 		 	 Signature of Employee

			
		 		 	 
		 		 	 Spouse’s Signature (If beneficiary other than spouse)

  
 -3-

 SAMPLE WITHDRAWAL NOTICE 

CYTOKINETICS, INCORPORATED 
 2004 EMPLOYEE STOCK PURCHASE PLAN 
 NOTICE OF WITHDRAWAL 

The undersigned participant in the Offering Period of the Cytokinetics, Incorporated 2004 Employee Stock Purchase Plan
which began on ____________, ______ (the “Offering Date”) hereby notifies the Company that he or she hereby withdraws from the Offering Period. He or she hereby directs the Company to pay to the undersigned as promptly as practicable all
the payroll deductions credited to his or her account with respect to such Offering Period. The undersigned understands and agrees that his or her option for such Offering Period will be automatically terminated. The undersigned understands further
that no further payroll deductions will be made for the purchase of shares in the current Offering Period and the undersigned shall be eligible to participate in succeeding Offering Periods only by delivering to the Company a new Subscription
Agreement. 
  

	
	Name and Address of Participant:
	
	  
	
	  
	
	  

  

			
	 Signature:

		
	  	 	  
		
	 Date:
	 	 

  
 -4-

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