Document:

EX-10.8

 Exhibit 10.8 

KODIAK SCIENCES INC. 

2018 EQUITY INCENTIVE PLAN 

RESTRICTED STOCK UNIT AGREEMENT 

NOTICE OF RESTRICTED STOCK UNIT GRANT 

Unless otherwise defined herein, the terms defined in the Kodiak Sciences Inc. 2018 Equity Incentive Plan (the “Plan”) will
have the same defined meanings in this Restricted Stock Unit Agreement, which includes the Notice of Restricted Stock Unit Grant (the “Notice of Grant”), Terms and Conditions of Restricted Stock Unit Grant attached hereto as Exhibit
A, and all appendices and exhibits attached thereto (all together, the “Award Agreement”). 
 Participant: 

Address: 
 The undersigned
Participant has been granted the right to receive an Award of Restricted Stock Units, subject to the terms and conditions of the Plan and this Award Agreement, as follows: 
  

					
	Grant Number:	 	 	 	
			
	Date of Grant:	 	 	 	
			
	Vesting Commencement Date:	 	 	 	
			
	Number of Restricted Stock Units:	 	 	 	

 Vesting Schedule: 

Subject to any acceleration provisions contained in the Plan or set forth below, the Restricted Stock Units will vest in accordance with the
following schedule: 
 [Twenty-five percent (25%) of the Restricted Stock Units will vest on the one (1)-year anniversary of the
Vesting Commencement Date, and one sixteenth (1/16th) of the Restricted Stock Units will vest on each Quarterly Vesting Date (as defined below) thereafter, subject to Participant continuing to be
a Service Provider through each such date.] 
 A “Quarterly Vesting Date” is the first trading day on or after each
of                     . 
 Except as
otherwise provided in the following paragraph, in the event Participant ceases to be a Service Provider for any or no reason before Participant vests in the Restricted Stock Units, the Restricted Stock Units and Participant’s right to acquire
any Shares hereunder will immediately terminate. 
 The vesting schedule above notwithstanding, the Restricted Stock Units shall be subject
to the following special vesting acceleration provisions (referred to herein as the “Accelerated Vesting Benefits”), subject to Participant’s execution and delivery of a release and waiver of claims agreement drafted by and
satisfactory to counsel for the Company, and in the case of termination, 

 
such release and waiver of claims agreement must be executed and become effective within sixty (60) days following the employment termination date (“Termination Date”) or the
second (2nd) anniversary of the Change in Control, as applicable (the date such release and waiver of claims agreement becomes effective, the “Release Effective Date”): 

 

	 	•	 	 If, at any time before the consummation of any Change in Control, Participant’s employment is terminated by
the Company without Cause (as defined below or in a Separate Agreement, as applicable) and other than for death or Disability, or by Participant with Good Reason (as defined below or in a Separate Agreement, as applicable), then that number of
Restricted Stock Units as would have vested in the twelve (12)-month period following the Termination Date, had Participant continued to be employed by the Company for such period, shall vest, effective as of the Release Effective Date.

  

	 	•	 	 If (i) on the date twenty-four (24) months immediately
following the consummation of any Change in Control, Participant is providing services to the acquiring company as either an employee or a consultant or (ii) within twenty-four (24) months following the consummation of any Change in
Control, Participant’s employment is terminated by the Company without Cause and other than for death or Disability, or by Participant for Good Reason (as defined below), then in either the case of (i) or (ii), one hundred percent (100%)
of the Restricted Stock Units that remain unvested shall vest in full, effective as of the Release Effective Date. 

Unless any agreement between Participant and the Company (a “Separate Agreement”) provides a definition that is more favorable to
Participant, “Cause” shall mean: (i) Participant’s conviction of, including pleading guilty or nolo contendere to, any felony or any crime involving dishonesty; (ii) Participant’s participation in any fraud or act
of dishonesty against the Company that has caused or is reasonably expected to result in injury to the Company; (iii) a material violation by Participant of any of the Company’s written policies or other serious misconduct, in each case
that results in or is reasonably likely to result in material harm to Company; (iv) Participant’s willful and continued failure substantially to perform any of Participant’s job duties (other than as a result of total or partial
Disability) that is not cured within thirty (30) days following written notice of Cause from the Company; (v) conduct by Participant which, in the good faith and reasonable determination of the Company’s Board of Directors,
demonstrates gross unfitness to serve; or (vi) Participant’s material breach of any agreement with the Company (or its subsidiaries or successors). 

Unless any Separate Agreement provides a definition that is more favorable to Participant, “Good Reason” shall mean the occurrence
of any one or more of the following events without the prior written consent of Participant: (i) a material reduction in base salary or targeted incentive bonus opportunity, or benefits; (ii) a material reduction in Participant’s
title, duties, or responsibilities without Cause provided that a reassignment following a Change in Control to a position that is substantially similar to the position held prior to the Change in Control shall not constitute a material reduction in
job responsibilities or duties; (iii) a relocation of Participant’s primary work location that increases Participant’s one-way commute by more than fifty (50) miles; (iv) failure of the
successor company to assume obligations contained in the Award or any other equity compensation agreement in place between Participant and the Company at the time of the Change in Control; or (v) the Company’s material breach of any terms
of the Award or employment 

  
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agreement with Participant; provided, however, that no such event or condition shall constitute Good Reason unless (x) Participant gives the Company a written notice of termination for Good
Reason not more than ninety (90) days after the initial existence of the condition, (y) the grounds for termination (if susceptible to correction) are not corrected by the Company within thirty (30) days of its receipt of such notice,
and (z) the Termination Date occurs within ninety (90) days following the Company’s receipt of such notice. 

Notwithstanding anything herein to the contrary, in the event a Separate Agreement provides for vesting acceleration benefits that are more
favorable than the Accelerated Vesting Benefits, the terms of the Separate Agreement shall apply in lieu of the Accelerated Vesting Benefits. 

By Participant’s signature and the signature of the representative of Kodiak Sciences Inc. (the “Company”) below,
Participant and the Company agree that this Award of Restricted Stock Units is granted under and governed by the terms and conditions of the Plan, any applicable Separate Agreement, and this Award Agreement, including the Terms and Conditions of
Restricted Stock Unit Grant, attached hereto as Exhibit A, all of which are made a part of this document. Participant acknowledges receipt of a copy of the Plan. Participant has reviewed the Plan and this Award Agreement in their entirety,
has had an opportunity to obtain the advice of counsel prior to executing this Award Agreement, and fully understands all provisions of the Plan and this Award Agreement. Participant hereby agrees to accept as binding, conclusive, and final all
decisions or interpretations of the Administrator upon any questions relating to the Plan and the Award Agreement. Participant further agrees to notify the Company upon any change in the residence address indicated below. 

 

					
	PARTICIPANT:	 		 	KODIAK SCIENCES INC.
			
	   
	 		 	  

	Signature	 		 	Signature
			
	   
	 		 	  

	Print Name	 		 	Print Name
			
	  
	 		 	  

		 		 	Title
	Address:	 		 	
			
	   
	 		 	  

			
	   
	 		 	  

  
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 EXHIBIT A 

TERMS AND CONDITIONS OF RESTRICTED STOCK UNIT GRANT 

1. Grant of Restricted Stock Units. The Company hereby grants to the individual (the “Participant”) named in the Notice of
Grant of Restricted Stock Units of this Award Agreement (the “Notice of Grant”) under the Plan an Award of Restricted Stock Units, subject to all of the terms and conditions in this Award Agreement and the Plan, which is incorporated
herein by reference. Subject to Section 19(c) of the Plan, in the event of a conflict between the terms and conditions of the Plan and this Award Agreement, the terms and conditions of the Plan shall prevail. 

2. Company’s Obligation to Pay. Each Restricted Stock Unit represents the right to receive a Share on the date it vests. Unless
and until the Restricted Stock Units will have vested in the manner set forth in Section 3 or 4, Participant will have no right to payment of any such Restricted Stock Units. Prior to actual payment of any vested Restricted Stock Units, such
Restricted Stock Unit will represent an unsecured obligation of the Company, payable (if at all) only from the general assets of the Company. 

3. Vesting Schedule. Except as provided in Section 4, and subject to Section 5, the Restricted Stock Units awarded by this
Award Agreement will vest in accordance with the vesting schedule set forth in the Notice of Grant, subject to Participant continuing to be a Service Provider through each applicable vesting date. 

4. Payment after Vesting. 

(a) General Rule. Subject to Section 8, any Restricted Stock Units that vest will be paid to Participant (or in the event of
Participant’s death, to his or her properly designated beneficiary or estate) in whole Shares. Subject to the provisions of Section 4(b), such vested Restricted Stock Units shall be paid in whole Shares as soon as practicable after
vesting, but in each such case within sixty (60) days following the vesting date. In no event will Participant be permitted, directly or indirectly, to specify the taxable year of payment of any Restricted Stock Units payable under this Award
Agreement. 
 (b) Acceleration. 

(i) Discretionary Acceleration. The Administrator, in its discretion, may accelerate the vesting of the balance, or some lesser
portion of the balance, of the unvested Restricted Stock Units at any time, subject to the terms of the Plan. If so accelerated, such Restricted Stock Units will be considered as having vested as of the date specified by the Administrator. If
Participant is a U.S. taxpayer, the payment of Shares vesting pursuant to this Section 4(b) shall in all cases be paid at a time or in a manner that is exempt from, or complies with, Section 409A. The prior sentence may be superseded in a
future agreement or amendment to this Award Agreement only by direct and specific reference to such sentence. 

 (ii) Notwithstanding anything in the Plan or this Award Agreement or any other agreement
(whether entered into before, on or after the Date of Grant), if the vesting of the balance, or some lesser portion of the balance, of the Restricted Stock Units is accelerated in connection with Participant’s termination as a Service Provider
(provided that such termination is a “separation from service” within the meaning of Section 409A, as determined by the Company), other than due to Participant’s death, and if (x) Participant is a U.S. taxpayer and a
“specified employee” within the meaning of Section 409A at the time of such termination as a Service Provider and (y) the payment of such accelerated Restricted Stock Units will result in the imposition of additional tax under
Section 409A if paid to Participant on or within the six (6) month period following Participant’s termination as a Service Provider, then the payment of such accelerated Restricted Stock Units will not be made until the date six
(6) months and one (1) day following the date of Participant’s termination as a Service Provider, unless Participant dies following his or her termination as a Service Provider, in which case, the Restricted Stock Units will be paid
in Shares to Participant’s estate as soon as practicable following his or her death. 
 (c) Section 409A. It is the intent of
this Award Agreement that it and all payments and benefits to U.S. taxpayers hereunder be exempt from, or comply with, the requirements of Section 409A so that none of the Restricted Stock Units provided under this Award Agreement or Shares
issuable thereunder will be subject to the additional tax imposed under Section 409A, and any ambiguities herein will be interpreted to be so exempt or so comply. Each payment payable under this Award Agreement is intended to constitute a
separate payment for purposes of Treasury Regulation Section 1.409A-2(b)(2). However, in no event will the Company reimburse Participant, or be otherwise responsible for, any taxes or costs that may be
imposed on Participant as a result of Section 409A. For purposes of this Award Agreement, “Section 409A” means Section 409A of the Code, and any final Treasury Regulations and Internal Revenue Service guidance thereunder, as
each may be amended from time to time. 
 5. Forfeiture Upon Termination as a Service Provider. Notwithstanding any contrary
provision of this Award Agreement, if Participant ceases to be a Service Provider for any or no reason, the then-unvested Restricted Stock Units awarded by this Award Agreement will thereupon be forfeited at no cost to the Company and Participant
will have no further rights thereunder. 
 6. Tax Consequences. Participant has reviewed with his or her own tax advisors the U.S.
federal, state, local and non-U.S. tax consequences of this investment and the transactions contemplated by this Award Agreement. With respect to such matters, Participant relies solely on such advisors and
not on any statements or representations of the Company or any of its agents, written or oral. Participant understands that Participant (and not the Company) shall be responsible for Participant’s own tax liability that may arise as a result of
this investment or the transactions contemplated by this Award Agreement. 
 7. Death of Participant. Any distribution or delivery to
be made to Participant under this Award Agreement will, if Participant is then deceased, be made to Participant’s designated beneficiary, or if no beneficiary survives Participant, the administrator or executor of Participant’s estate. Any
such transferee must furnish the Company with (a) written notice of his or her status as transferee, and (b) evidence satisfactory to the Company to establish the validity of the transfer and compliance with any laws or regulations
pertaining to said transfer. 

  
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 8. Tax Obligations 

(a) Responsibility for Taxes. Participant acknowledges that, regardless of any action taken by the Company or, if different,
Participant’s employer (the “Employer”) or Parent or Subsidiary to which Participant is providing services (together, the Company, Employer and/or Parent or Subsidiary to which the Participant is providing services, the “Service
Recipient”), the ultimate liability for any tax and/or social insurance liability obligations and requirements in connection with the Restricted Stock Units, including, without limitation, (i) all federal, state, and local taxes (including
the Participant’s Federal Insurance Contributions Act (FICA) obligation) that are required to be withheld by the Company or the Employer or other payment of tax-related items related to Participant’s
participation in the Plan and legally applicable to Participant, (ii) the Participant’s and, to the extent required by the Company (or Service Recipient), the Company’s (or Service Recipient’s) fringe benefit tax liability, if
any, associated with the grant, vesting, or settlement of the Restricted Stock Units or sale of Shares, and (iii) any other Company (or Service Recipient) taxes the responsibility for which the Participant has, or has agreed to bear, with
respect to the Restricted Stock Units (or settlement thereof or issuance of Shares thereunder) (collectively, the “Tax Obligations”), is and remains Participant’s responsibility and may exceed the amount actually withheld by the
Company or the Service Recipient. Participant further acknowledges that the Company and/or the Service Recipient (A) make no representations or undertakings regarding the treatment of any Tax Obligations in connection with any aspect of the
Restricted Stock Units, including, but not limited to, the grant, vesting or settlement of the Restricted Stock Units, the subsequent sale of Shares acquired pursuant to such settlement and the receipt of any dividends or other distributions, and
(B) do not commit to and are under no obligation to structure the terms of the grant or any aspect of the Restricted Stock Units to reduce or eliminate Participant’s liability for Tax Obligations or achieve any particular tax result.
Further, if Participant is subject to Tax Obligations in more than one jurisdiction between the Date of Grant and the date of any relevant taxable or tax withholding event, as applicable, Participant acknowledges that the Company and/or the Service
Recipient (or former employer, as applicable) may be required to withhold or account for Tax Obligations in more than one jurisdiction. If Participant fails to make satisfactory arrangements for the payment of any required Tax Obligations hereunder
at the time of the applicable taxable event, Participant acknowledges and agrees that the Company may refuse to issue or deliver the Shares. 

(b) Tax Withholding. When Shares are issued as payment for vested Restricted Stock Units, Participant generally will recognize
immediate U.S. taxable income if Participant is a U.S. taxpayer. If Participant is a non-U.S. taxpayer, Participant will be subject to applicable taxes in his or her jurisdiction. Pursuant to such procedures
as the Administrator may specify from time to time, the Company and/or Service Recipient shall withhold the amount required to be withheld for the payment of Tax Obligations. The Administrator, in its sole discretion and pursuant to such procedures
as it may specify from time to time, may permit Participant to satisfy such Tax Obligations, in whole or in part (without limitation), if permissible by applicable local law, by (i) paying cash, (ii) electing to have the Company withhold
otherwise deliverable Shares having a fair market value equal to the minimum amount that is necessary to meet the withholding requirement for such Tax Obligations (or such greater amount as Participant may elect if permitted by the Administrator, if
such greater amount would not result in adverse financial accounting consequences), (iii) withholding the amount of such Tax Obligations from Participant’s wages or other cash compensation paid to Participant by the Company and/or the Service
Recipient, 

  
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(iv) delivering to the Company already vested and owned Shares having a fair market value equal to such Tax Obligations, or (v) selling a sufficient number of such Shares otherwise
deliverable to Participant through such means as the Company may determine in its sole discretion (whether through a broker or otherwise) equal to the minimum amount that is necessary to meet the withholding requirement for such Tax Obligations (or
such greater amount as Participant may elect if permitted by the Administrator, if such greater amount would not result in adverse financial accounting consequences). To the extent determined appropriate by the Company in its discretion, it will
have the right (but not the obligation) to satisfy any Tax Obligations by reducing the number of Shares otherwise deliverable to Participant and, until determined otherwise by the Company, this will be the method by which such Tax Obligations are
satisfied. Further, if Participant is subject to tax in more than one jurisdiction between the Date of Grant and a date of any relevant taxable or tax withholding event, as applicable, Participant acknowledges and agrees that the Company and/or the
Service Recipient (and/or former employer, as applicable) may be required to withhold or account for tax in more than one jurisdiction. If Participant fails to make satisfactory arrangements for the payment of such Tax Obligations hereunder at the
time any applicable Restricted Stock Units otherwise are scheduled to vest pursuant to Sections 3 or 4, Participant will permanently forfeit such Restricted Stock Units and any right to receive Shares thereunder and such Restricted Stock Units will
be returned to the Company at no cost to the Company. Participant acknowledges and agrees that the Company may refuse to deliver the Shares if such Tax Obligations are not delivered at the time they are due. 

9. Rights as Stockholder. Neither Participant nor any person claiming under or through Participant will have any of the rights or
privileges of a stockholder of the Company in respect of any Shares deliverable hereunder unless and until certificates representing such Shares (which may be in book entry form) will have been issued, recorded on the records of the Company or its
transfer agents or registrars, and delivered to Participant (including through electronic delivery to a brokerage account). After such issuance, recordation, and delivery, Participant will have all the rights of a stockholder of the Company with
respect to voting such Shares and receipt of dividends and distributions on such Shares. 
 10. No Guarantee of Continued Service.
PARTICIPANT ACKNOWLEDGES AND AGREES THAT THE VESTING OF THE RESTRICTED STOCK UNITS PURSUANT TO THE VESTING SCHEDULE HEREOF IS EARNED ONLY BY CONTINUING AS A SERVICE PROVIDER, WHICH UNLESS PROVIDED OTHERWISE UNDER APPLICABLE LAW IS AT THE WILL OF THE
COMPANY (OR THE SERVICE RECIPIENT) AND NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS RESTRICTED STOCK UNIT AWARD OR ACQUIRING SHARES HEREUNDER. PARTICIPANT FURTHER ACKNOWLEDGES AND AGREES THAT THIS AWARD AGREEMENT, THE TRANSACTIONS
CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS A SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND SHALL NOT INTERFERE IN ANY WAY WITH
PARTICIPANT’S RIGHT OR THE RIGHT OF THE COMPANY (OR THE SERVICE RECIPIENT) TO TERMINATE PARTICIPANT’S RELATIONSHIP AS A SERVICE PROVIDER, SUBJECT TO APPLICABLE LAW, WHICH TERMINATION, UNLESS PROVIDED OTHERWISE UNDER APPLICABLE LAW, MAY BE
AT ANY TIME, WITH OR WITHOUT CAUSE. 

  
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 11. Grant is Not Transferable. Except to the limited extent provided in
Section 7, this grant and the rights and privileges conferred hereby will not be transferred, assigned, pledged or hypothecated in any way (whether by operation of law or otherwise) and will not be subject to sale under execution, attachment or
similar process. Upon any attempt to transfer, assign, pledge, hypothecate or otherwise dispose of this grant, or any right or privilege conferred hereby, or upon any attempted sale under any execution, attachment or similar process, this grant and
the rights and privileges conferred hereby immediately will become null and void. 
 12. Nature of Grant. In accepting the grant,
Participant acknowledges, understands, and agrees that: 
 (a) the grant of the Restricted Stock Units is voluntary and occasional and does
not create any contractual or other right to receive future grants of Restricted Stock Units, or benefits in lieu of Restricted Stock Units, even if Restricted Stock Units have been granted in the past; 

(b) all decisions with respect to future Restricted Stock Units or other grants, if any, will be at the sole discretion of the Company; 

(c) Participant is voluntarily participating in the Plan; 

(d) the Restricted Stock Units and the Shares subject to the Restricted Stock Units are not intended to replace any pension rights or
compensation; 
 (e) the Restricted Stock Units and the Shares subject to the Restricted Stock Units, and the income and value of same, are
not part of normal or expected compensation for purposes of calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, bonuses,
long-service awards, pension or retirement or welfare benefits or similar payments; 
 (f) the future value of the underlying Shares is
unknown, indeterminable and cannot be predicted; 
 (g) for purposes of the Restricted Stock Units, Participant’s status as a Service
Provider will be considered terminated as of the date Participant is no longer actively providing services to the Company or any Parent or Subsidiary (regardless of the reason for such termination and whether or not later to be found invalid or in
breach of employment laws in the jurisdiction where Participant is a Service Provider or the terms of Participant’s employment or service agreement, if any), and unless otherwise expressly provided in this Award Agreement (including by
reference in the Notice of Grant to other arrangements or contracts) or determined by the Administrator, Participant’s right to vest in the Restricted Stock Units under the Plan, if any, will terminate as of such date and will not be extended
by any notice period (e.g., Participant’s period of service would not include any contractual notice period or any period of “garden leave” or similar period mandated under employment laws in the jurisdiction where Participant is a
Service Provider or the terms of Participant’s employment or service agreement, if any, unless Participant is providing bona fide services during such time); the Administrator shall have the exclusive discretion to determine when Participant is
no longer actively providing services for purposes of the Restricted Stock Units grant (including whether Participant may still be considered to be providing services while on a leave of absence and consistent with local law); 

  
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 (h) unless otherwise provided in the Plan or by the Company in its discretion, the
Restricted Stock Units and the benefits evidenced by this Award Agreement do not create any entitlement to have the Restricted Stock Units or any such benefits transferred to, or assumed by, another company nor be exchanged, cashed out or
substituted for, in connection with any corporate transaction affecting the Shares; and 
 (i) the following provisions apply only if
Participant is providing services outside the United States: 
 (i) the Restricted Stock Units and the Shares subject to the Restricted
Stock Units are not part of normal or expected compensation or salary for any purpose; 
 (ii) Participant acknowledges and agrees that
none of the Company, the Employer or any Parent or Subsidiary shall be liable for any foreign exchange rate fluctuation between Participant’s local currency and the United States Dollar that may affect the value of the Restricted Stock Units or
of any amounts due to Participant pursuant to the settlement of the Restricted Stock Units or the subsequent sale of any Shares acquired upon settlement; and 

(iii) no claim or entitlement to compensation or damages shall arise from forfeiture of the Restricted Stock Units resulting from the
termination of Participant’s status as a Service Provider (for any reason whatsoever whether or not later found to be invalid or in breach of employment laws in the jurisdiction where Participant is a Service Provider or the terms of
Participant’s employment or service agreement, if any), and in consideration of the grant of the Restricted Stock Units to which Participant is otherwise not entitled, Participant irrevocably agrees never to institute any claim against the
Company, any Parent or Subsidiary or the Service Recipient, waives his or her ability, if any, to bring any such claim, and releases the Company, any Parent or Subsidiary and the Service Recipient from any such claim; if, notwithstanding the
foregoing, any such claim is allowed by a court of competent jurisdiction, then, by participating in the Plan, Participant shall be deemed irrevocably to have agreed not to pursue such claim and agrees to execute any and all documents necessary to
request dismissal or withdrawal of such claim. 
 13. No Advice Regarding Grant. The Company is not providing any tax, legal or
financial advice, nor is the Company making any recommendations regarding Participant’s participation in the Plan, or Participant’s acquisition or sale of the underlying Shares. Participant is hereby advised to consult with his or her own
personal tax, legal and financial advisors regarding his or her participation in the Plan before taking any action related to the Plan. 

14. Data Privacy. Participant hereby explicitly and unambiguously consents to the collection, use and transfer, in
electronic or other form, of Participant’s personal data as described in this Award Agreement and any other Restricted Stock Unit grant materials by and among, as applicable, the Employer, or other Service Recipient the Company and any Parent
or Subsidiary for the exclusive purpose of implementing, administering and managing Participant’s participation in the Plan. 

  
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 Participant understands that the Company and the Service Recipient may hold certain
personal information about Participant, including, but not limited to, Participant’s name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any Shares or
directorships held in the Company, details of all Restricted Stock Units or any other entitlement to Shares awarded, canceled, exercised, vested, unvested or outstanding in Participant’s favor (“Data”), for the exclusive purpose of
implementing, administering and managing the Plan. 
 Participant understands that Data will be transferred to a stock plan
service provider as may be selected by the Company in the future, which is assisting the Company with the implementation, administration, and management of the Plan. Participant understands that the recipients of the Data may be located in the
United States or elsewhere, and that the recipients’ country of operation (e.g., the United States) may have different data privacy laws and protections than Participant’s country. Participant understands that if he or she resides outside
the United States, he or she may request a list with the names and addresses of any potential recipients of the Data by contacting his or her local human resources representative. Participant authorizes the Company, any stock plan service provider
selected by the Company and any other possible recipients which may assist the Company (presently or in the future) with implementing, administering and managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other
form, for the sole purpose of implementing, administering and managing his or her participation in the Plan. Participant understands that Data will be held only as long as is necessary to implement, administer and manage Participant’s
participation in the Plan. Participant understands if he or she resides outside the United States, he or she may, at any time, view Data, request additional information about the storage and processing of Data, require any necessary amendments to
Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing his or her local human resources representative. Further, Participant understands that he or she is providing the consents herein on a purely
voluntary basis. If Participant does not consent, or if Participant later seeks to revoke his or her consent, his or her status as a Service Provider and career with the Service Recipient will not be adversely affected; the only adverse consequence
of refusing or withdrawing Participant’s consent is that the Company would not be able to grant Participant Restricted Stock Units or other equity awards or administer or maintain such awards. Therefore, Participant understands that refusing or
withdrawing his or her consent may affect Participant’s ability to participate in the Plan. For more information on the consequences of Participant’s refusal to consent or withdrawal of consent, Participant understands that he or she may
contact his or her local human resources representative. 
 15. Address for Notices. Any notice to be given to the Company
under the terms of this Award Agreement will be addressed to the Company at Kodiak Sciences Inc., 2631 Hanover Street, Palo Alto, CA 94304, or at such other address as the Company may hereafter designate in writing. 

16. Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to deliver any documents related to the
Restricted Stock Units awarded under the Plan or future Restricted Stock Units that may be awarded under the Plan by electronic means or request Participant’s consent to participate in the Plan by electronic means. Participant hereby consents
to receive such documents by electronic delivery and agrees to participate in the Plan through any online or electronic system established and maintained by the Company or a third party designated by the Company. 

  
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 17. No Waiver. Either party’s failure to enforce any provision or provisions of
this Award Agreement shall not in any way be construed as a waiver of any such provision or provisions, nor prevent that party from thereafter enforcing each and every other provision of this Award Agreement. The rights granted both parties herein
are cumulative and shall not constitute a waiver of either party’s right to assert all other legal remedies available to it under the circumstances. 

18. Successors and Assigns. The Company may assign any of its rights under this Award Agreement to single or multiple assignees, and
this Award Agreement shall inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer herein set forth, this Award Agreement shall be binding upon Participant and his or her heirs, executors,
administrators, successors and assigns. The rights and obligations of Participant under this Award Agreement may only be assigned with the prior written consent of the Company. 

19. Additional Conditions to Issuance of Stock. If at any time the Company will determine, in its discretion, that the listing,
registration, qualification or rule compliance of the Shares upon any securities exchange or under any state, federal or non-U.S. law, the tax code and related regulations or under the rulings or regulations
of the United States Securities and Exchange Commission or any other governmental regulatory body or the clearance, consent or approval of the United States Securities and Exchange Commission or any other governmental regulatory authority is
necessary or desirable as a condition to the issuance of Shares to Participant (or his or her estate) hereunder, such issuance will not occur unless and until such listing, registration, qualification, rule compliance, clearance, consent or approval
will have been completed, effected or obtained free of any conditions not acceptable to the Company. Subject to the terms of the Award Agreement and the Plan, the Company shall not be required to issue any certificate or certificates for Shares
hereunder prior to the lapse of such reasonable period of time following the date of vesting of the Restricted Stock Units as the Administrator may establish from time to time for reasons of administrative convenience. 

20. Language. If Participant has received this Award Agreement or any other document related to the Plan translated into a language
other than English and if the meaning of the translated version is different than the English version, the English version will control. 

21. Interpretation. The Administrator will have the power to interpret the Plan and this Award Agreement and to adopt such rules for
the administration, interpretation and application of the Plan as are consistent therewith and to interpret or revoke any such rules (including, but not limited to, the determination of whether or not any Restricted Stock Units have vested). All
actions taken and all interpretations and determinations made by the Administrator in good faith will be final and binding upon Participant, the Company and all other interested persons. Neither the Administrator nor any person acting on behalf of
the Administrator will be personally liable for any action, determination, or interpretation made in good faith with respect to the Plan or this Award Agreement. 

  
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 22. Captions. Captions provided herein are for convenience only and are not to serve
as a basis for interpretation or construction of this Award Agreement. 
 23. Amendment, Suspension or Termination of the Plan. By
accepting this Award, Participant expressly warrants that he or she has received an Award of Restricted Stock Units under the Plan, and has received, read, and understood a description of the Plan. Participant understands that the Plan is
discretionary in nature and may be amended, suspended or terminated by the Company at any time. 
 24. Modifications to the Award
Agreement. This Award Agreement and any applicable Separate Agreement constitute the entire understanding of the parties on the subjects covered. Participant expressly warrants that he or she is not accepting this Award Agreement in reliance on
any promises, representations, or inducements other than those contained herein. Modifications to this Award Agreement or the Plan can be made only in an express written contract executed by a duly authorized officer of the Company. Notwithstanding
anything to the contrary in the Plan or this Award Agreement, the Company reserves the right to revise this Award Agreement as it deems necessary or advisable, in its sole discretion and without the consent of Participant, to comply with
Section 409A or to otherwise avoid imposition of any additional tax or income recognition under Section 409A in connection to this Award of Restricted Stock Units. 

25. Governing Law; Venue; Severability. This Award Agreement and the Restricted Stock Units are governed by the internal substantive
laws, but not the choice of law rules, of California. For purposes of litigating any dispute that arises under these Restricted Stock Units or this Award Agreement, the parties hereby submit to and consent to the jurisdiction of the State of
California, and agree that such litigation will be conducted in the courts of Santa Clara County, California, or the federal courts for the United States for the Northern District of California, and no other courts, where this Award Agreement is
made and/or to be performed. In the event that any provision hereof becomes or is declared by a court of competent jurisdiction to be illegal, unenforceable or void, this Award Agreement shall continue in full force and effect. 

26. Entire Agreement. The Plan and any applicable Separate Agreement are incorporated herein by reference. The Plan, this Award
Agreement (including the appendices and exhibits referenced herein), and any applicable Separate Agreement constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior
undertakings and agreements of the Company and Participant with respect to the subject matter hereof, and may not be modified adversely to the Participant’s interest except by means of a writing signed by the Company and Participant. 

27. Country Addendum. Notwithstanding any provisions in this Award Agreement, the Restricted Stock Unit grant shall be subject to any
special terms and conditions set forth in the appendix (if any) to this Award Agreement for Participant’s country. Moreover, if Participant relocates to one of the countries included in the Country Addendum (if any), the special terms and
conditions for such country will apply to Participant, to the extent the Company determines that the application of such terms and conditions is necessary or advisable for legal or administrative reasons. The Country Addendum constitutes part of
this Award Agreement. 

  
 9 

 KODIAK SCIENCES INC. 

2018 EQUITY INCENTIVE PLAN 

RESTRICTED STOCK UNIT AGREEMENT 

COUNTRY ADDENDUM 
 TERMS AND
CONDITIONS 
 This Country Addendum includes additional terms and conditions that govern the Award of Restricted Stock Units granted to Participant
under the Plan if Participant works in one of the countries listed below. If Participant is a citizen or resident of a country (or is considered as such for local law purposes) other than the one in which he or she is currently working or if
Participant relocates to another country after receiving the Award of Restricted Stock Units, the Company will, in its discretion, determine the extent to which the terms and conditions contained herein will be applicable to Participant. 

Certain capitalized terms used but not defined in this Country Addendum shall have the meanings set forth in the Plan, and/or the Restricted Stock Unit
Agreement to which this Country Addendum is attached. 
 NOTIFICATIONS 

This Country Addendum also includes notifications relating to exchange control and other issues of which Participant should be aware with respect to his or her
participation in the Plan. The information is based on the exchange control, securities and other laws in effect in the countries listed in this Country Addendum, as of
                     (except as otherwise noted below). Such laws are often complex and change frequently. As a result, the Company strongly
recommends that Participant not rely on the notifications herein as the only source of information relating to the consequences of his or her participation in the Plan because the information may be outdated when Participant vests in the Restricted
Stock Units and acquires Shares, or when Participant subsequently sell Shares acquired under the Plan. 
 In addition, the notifications are general in
nature and may not apply to Participant’s particular situation, and the Company is not in a position to assure Participant of any particular result. Accordingly, Participant is advised to seek appropriate professional advice as to how the
relevant laws in Participant’s country may apply to Participant’s situation. 
 Finally, if Participant is a citizen or resident of a country
other than the one in which Participant is currently working (or is considered as such for local law purposes) or if Participant moves to another country after receiving the Award of Restricted Stock Units, the information contained herein may not
be applicable to Participant. 

  
 10EX-10.9

 Exhibit 10.9 

KODIAK SCIENCES INC. 

2018 EMPLOYEE STOCK PURCHASE PLAN 

(Adopted on August 14, 2018 and effective as of the business day prior to the Company’s initial public offering) 

1. Purpose. The purpose of the Plan is to provide employees of the Company and its Designated Companies with an opportunity to purchase
Common Stock through accumulated Contributions. The Company intends for the Plan to have two components: a component that is intended to qualify as an “employee stock purchase plan” under Section 423 of the Code (the
“423 Component”) and a component that is not intended to qualify as an “employee stock purchase plan” under Section 423 of the Code (the “Non-423 Component”). The
provisions of the 423 Component, accordingly, will be construed so as to extend and limit Plan participation in a uniform and nondiscriminatory basis consistent with the requirements of Section 423 of the Code. An option to purchase shares
of Common Stock under the Non-423 Component will be granted pursuant to rules, procedures, or sub-plans adopted by the Administrator designed to achieve tax, securities
laws, or other objectives for Eligible Employees and the Company. Except as otherwise provided herein, the Non-423 Component will operate and be administered in the same manner as the 423 Component. 

2. Definitions. 
 (a)
“Administrator” means the Board or any Committee designated by the Board to administer the Plan pursuant to Section 14. 

(b) “Affiliate” means any entity, other than a Subsidiary, in which the Company has an equity or other ownership interest.

 (c) “Applicable Laws” means the requirements relating to the administration of equity-based awards under U.S. state
corporate laws, U.S. federal and state securities laws, the Code, any stock exchange or quotation system on which the Common Stock is listed or quoted and the applicable laws of any foreign country or jurisdiction where options are, or will be,
granted under the Plan. 
 (d) “Board” means the Board of Directors of the Company. 

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

(i) A change in the ownership of the Company which occurs on the date that any one person, or more than one person acting as a group
(“Person”), acquires ownership of the stock of the Company that, together with the stock held by such Person, constitutes more than fifty percent (50%) of the total voting power of the stock of the Company; provided, however, that
for purposes of this subsection, the acquisition of additional stock by any one Person, who is considered to own more than fifty percent (50%) of the total voting power of the stock of the Company will not be considered a Change in Control. Further,
if the stockholders of the Company immediately before 

 
such change in ownership continue to retain immediately after the change in ownership, in substantially the same proportions as their ownership of shares of the Company’s voting stock
immediately prior to the change in ownership, direct or indirect beneficial ownership of fifty percent (50%) or more of the total voting power of the stock of the Company or of the ultimate parent entity of the Company, such event shall not be
considered a Change in Control under this subsection (i). For this purpose, indirect beneficial ownership shall include, without limitation, an interest resulting from ownership of the voting securities of one or more corporations or other business
entities which own the Company, as the case may be, either directly or through one or more subsidiary corporations or other business entities; or 

(ii) A change in the effective control of the Company which occurs on the date that a majority of members of the Board is replaced during any
twelve (12)-month period by Directors whose appointment or election is not endorsed by a majority of the members of the Board prior to the date of the appointment or election. For purposes of this subsection (ii), if any Person is considered to be
in effective control of the Company, the acquisition of additional control of the Company by the same Person will not be considered a Change in Control; or 

(iii) A change in the ownership of a substantial portion of the Company’s assets which occurs on the date that any Person acquires (or
has acquired during the twelve (12)-month period ending on the date of the most recent acquisition by such person or persons) assets from the Company that have a total gross fair market value equal to or
more than fifty percent (50%) of the total gross fair market value of all of the assets of the Company immediately prior to such acquisition or acquisitions; provided, however, that for purposes of this subsection, the following will not constitute
a change in the ownership of a substantial portion of the Company’s assets: (A) a transfer to an entity that is controlled by the Company’s stockholders immediately after the transfer, or (B) a transfer of assets by the Company
to: (1) a stockholder of the Company (immediately before the asset transfer) in exchange for or with respect to the Company’s stock, (2) an entity, fifty percent (50%) or more of the total value or voting power of which is owned,
directly or indirectly, by the Company, (3) a Person, that owns, directly or indirectly, fifty percent (50%) or more of the total value or voting power of all the outstanding stock of the Company, or (4) an entity, at least fifty percent
(50%) of the total value or voting power of which is owned, directly or indirectly, by a Person described in this subsection (iii)(B)(3). For purposes of this subsection, gross fair market value means the value of the assets of the Company, or the
value of the assets being disposed of, determined without regard to any liabilities associated with such assets. 
 For purposes of this
definition, persons will be considered to be acting as a group if they are owners of a corporation that enters into a merger, consolidation, purchase, or acquisition of stock, or similar business transaction with the Company. 

Notwithstanding the foregoing, a transaction will not be deemed a Change in Control unless the transaction qualifies as a change in control
event within the meaning of Code Section 409A, as it has been and may be amended from time to time, and any proposed or final U.S. Treasury Regulations and Internal Revenue Service guidance that has been promulgated or may be promulgated
thereunder from time to time. 
 Further and for the avoidance of doubt, a transaction will not constitute a Change in Control if:
(i) its sole purpose is to change the state of the Company’s incorporation, or (ii) its sole purpose is to create a holding company that will be owned in substantially the same proportions by the persons who held the Company’s
securities immediately before such transaction. 

  
 2 

 (f) “Code” means the U.S. Internal Revenue Code of 1986, as amended.
Reference to a specific section of the Code will include such section, any valid regulation or other official applicable guidance promulgated under such section, and any comparable provision of any future legislation or regulation amending,
supplementing or superseding such section or regulation. 
 (g) “Committee” means a committee of the Board appointed in
accordance with Section 14 hereof. 
 (h) “Common Stock” means the common stock of the Company. 

(i) “Company” means Kodiak Sciences Inc., a Delaware corporation, or any successor thereto.  

(j) “Compensation” includes an Eligible Employee’s base straight time gross earnings but excludes payments for incentive
compensation, bonuses, payments for overtime and shift premium, equity compensation income and other similar compensation. The Administrator, in its discretion, may, on a uniform and nondiscriminatory basis, establish a different definition of
Compensation for a subsequent Offering Period. 
 (k) “Contributions” means the payroll deductions and other additional
payments that the Company may permit to be made by a Participant to fund the exercise of options granted pursuant to the Plan. 
 (l)
“Designated Company” means any Subsidiary or Affiliate of the Company that has been designated by the Administrator from time to time in its sole discretion as eligible to participate in the Plan. For purposes of the 423 Component,
only the Company and its Subsidiaries may be Designated Companies, provided, however that at any given time, a Subsidiary that is a Designated Company under the 423 Component will not be a Designated Company under the
Non-423 Component. 
 (m) “Director” means a member of the Board. 

(n) “Eligible Employee” means any individual who is a common law employee providing services to the Company or a Designated
Company and is customarily employed for at least twenty (20) hours per week and more than five (5) months in any calendar year by the Employer, or any lesser number of hours per week and/or number of months in any calendar year established
by the Administrator (if required under applicable local law) for purposes of any separate Offering or the Non-423 Component. For purposes of the Plan, the employment relationship will be treated as continuing
intact while the individual is on sick leave or other leave of absence that the Employer approves or is legally protected under Applicable Laws. Where the period of leave exceeds three (3) months and the individual’s right to reemployment
is not guaranteed either by statute or by contract, the employment relationship will be deemed to have terminated three (3) months and one (1) day following the commencement of such leave. The Administrator, in its discretion, from time to
time may, prior to an Enrollment Date for all options to be granted on such Enrollment Date in an Offering, determine (on a uniform and nondiscriminatory basis or as 

  
 3 

 
otherwise permitted by Treasury Regulation Section 1.423-2) that the definition of Eligible Employee will or will not include an individual if he or
she: (i) has not completed at least two (2) years of service since his or her last hire date (or such lesser period of time as may be determined by the Administrator in its discretion), (ii) customarily works not more than twenty
(20) hours per week (or such lesser period of time as may be determined by the Administrator in its discretion), (iii) customarily works not more than five (5) months per calendar year (or such lesser period of time as may be determined by
the Administrator in its discretion), (iv) is a highly compensated employee within the meaning of Section 414(q) of the Code, or (v) is a highly compensated employee within the meaning of Section 414(q) of the Code with
compensation above a certain level or is an officer or subject to the disclosure requirements of Section 16(a) of the Exchange Act, provided the exclusion is applied with respect to each Offering in an identical manner to all highly compensated
individuals of the Employer whose Eligible Employees are participating in that Offering. Each exclusion will be applied with respect to an Offering in a manner complying with U.S. Treasury Regulation
Section 1.423-2(e)(2)(ii). 
 (o) “Employer” means the employer of the
applicable Eligible Employee(s). 
 (p) “Enrollment Date” means the first Trading Day of an Offering Period. 

(q) “Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended, including the rules and regulations
promulgated thereunder. 
 (r) “Exercise Date” means a date on which each outstanding option granted under the Plan will be
exercised (except if the Plan has been terminated), as may be determined by the Administrator, in its discretion and on a uniform and nondiscriminatory basis from time to time prior to an Enrollment Date for all options to be granted on such
Enrollment Date. For purposes of clarification, there may be multiple Exercise Dates during an Offering Period. 
 (s) “Fair Market
Value” means, as of any date, the value of a share of Common Stock determined as follows: 
 (i) the Fair Market Value will be the
closing sales price for Common Stock as quoted on any established stock exchange or national market system (including without limitation the New York Stock Exchange, NASDAQ Global Select Market, the NASDAQ Global Market or the NASDAQ Capital Market
of The NASDAQ Stock Market) on which the Common Stock is listed on the date of determination (or the closing bid, if no sales were reported), as reported in The Wall Street Journal or such other source as the Administrator deems reliable. If
the determination date for the Fair Market Value occurs on a non-trading day (i.e., a weekend or holiday), the Fair Market Value will be such price on the immediately preceding trading day, unless otherwise
determined by the Administrator. In the absence of an established market for the Common Stock, the Fair Market Value thereof will be determined in good faith by the Administrator. 

The determination of fair market value for purposes of tax withholding may be made in the Administrator’s discretion subject to
Applicable Laws and is not required to be consistent with the determination of Fair Market Value for other purposes. 

  
 4 

 (ii) In the absence of an established market for the Common Stock, the Fair Market Value
thereof will be determined in good faith by the Administrator. 
 (t) “Fiscal Year” means a fiscal year of the Company.

 (u) “New Exercise Date” means a new Exercise Date if the Administrator shortens any Offering Period then in progress.

 (v) “Offering” means an offer under the Plan of an option that may be exercised during an Offering Period as further
described in Section 4. For purposes of the Plan, the Administrator may designate separate Offerings under the Plan (the terms of which need not be identical) in which Eligible Employees of one or more Employers will participate, even if the
dates of the applicable Offering Periods of each such Offering are identical and the provisions of the Plan will separately apply to each Offering. To the extent permitted by U.S. Treasury Regulation
Section 1.423-2(a)(1), the terms of each Offering need not be identical provided that the terms of the Plan and an Offering together satisfy U.S. Treasury Regulation
Section 1.423-2(a)(2) and (a)(3). 
 (w) “Offering Period” means a period
beginning on such date as may be determined by the Administrator in its discretion and ending on such Exercise Date as may be determined by the Administrator in its discretion, in each case on a uniform and nondiscriminatory basis. The duration and
timing of Offering Periods may be changed pursuant to Sections 4, 20, and 30. 
 (x) “Parent” means a “parent
corporation,” whether now or hereafter existing, as defined in Section 424(e) of the Code. 
 (y) “Participant”
means an Eligible Employee that participates in the Plan. 
 (z) “Plan” means this Kodiak Sciences Inc. 2018 Employee Stock
Purchase Plan. 
 (aa) “Purchase Period” means the period, as determined by the Administrator in its discretion on a
uniform and nondiscriminatory basis, during an Offering Period that commences on the Offering Period’s Enrollment Date and ends on the next Exercise Date, except that if the Administrator determines that more than one Purchase Period should
occur within an Offering Period, subsequent Purchase Periods within such Offering Period commence after one Exercise Date and end with the next Exercise Date at such time or times as the Administrator determines prior to the commencement of the
Offering Period. 
 (bb) “Purchase Price” means the price per Share of the Shares purchased under any option granted under
the Plan as determined by the Administrator from time to time, in its discretion and on a uniform and nondiscriminatory basis for all options to be granted on an Enrollment Date. However, in no event will the Purchase Price be less than eighty-five
percent (85%) of the lower of the Fair Market Value of a share of Common Stock on the Enrollment Date or the Fair Market Value of a share of Common Stock on the Exercise Date and at all times in compliance with Section 423 of the Code (or any
successor rule or provision or any other Applicable Law, regulation or stock exchange rule). 
 (cc) “Registration Date”
means the effective date of the Registration Statement. 

  
 5 

 (dd) “Registration Statement” means the registration statement on Form S-1 filed with the Securities and Exchange Commission for the initial public offering of the Common Stock. 

(ee) “Subsidiary” means a “subsidiary corporation,” whether now or hereafter existing, as defined in
Section 424(f) of the Code. 
 (ff) “Trading Day” means a day on which the national stock exchange upon which the
Common Stock is listed is open for trading. 
 (gg) “U.S. Treasury Regulations” means the Treasury regulations of the Code.
Reference to a specific Treasury Regulation will include such Treasury Regulation, the section of the Code under which such regulation was promulgated, and any comparable provision of any future legislation or regulation amending, supplementing, or
superseding such Section or regulation. 
 3. Eligibility. 

(a) Offering Periods. Any Eligible Employee on a given Enrollment Date will be eligible to participate in the Plan, subject to the
requirements of Section 5. 
 (b) Non-U.S. Employees. Eligible Employees who are
citizens or residents of a non-U.S. jurisdiction (without regard to whether they also are citizens or residents of the United States or resident aliens (within the meaning of Section 7701(b)(1)(A) of the
Code)) may be excluded from participation in the Plan or an Offering if the participation of such Eligible Employees is prohibited under the laws of the applicable jurisdiction or if complying with the laws of the applicable jurisdiction would cause
the Plan or an Offering to violate Section 423 of the Code. In the case of the Non-423 Component, Eligible Employees may be excluded from participation in the Plan or an Offering if the Administrator
determines that participation of such Eligible Employees is not advisable or practicable. 
 (c) Limitations. Any provisions of the
Plan to the contrary notwithstanding, no Eligible Employee will be granted an option under the Plan (i) to the extent that, immediately after the grant, such Eligible Employee (or any other person whose stock would be attributed to such
Eligible 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 at the time such
option is granted) for each calendar year in which such option is outstanding at any time, as determined in accordance with Section 423 of the Code and the regulations thereunder. 

4. Offering Periods. Offering Periods will expire on the earliest to occur of (i) the completion of the purchase of Shares on the
last Exercise Date occurring within twenty-seven (27) months of the applicable Enrollment Date on which the option to purchase Shares was granted, or (ii) such shorter period as may be established by the Administrator from time to time, in
its discretion and on a uniform and nondiscriminatory basis, prior to an Enrollment Date for all options to be granted on such Enrollment Date. 

  
 6 

 5. Participation. An Eligible Employee may participate in the Plan by
(i) submitting to the Company’s stock administration office (or its designee) a properly completed subscription agreement authorizing Contributions in the form provided by the Administrator for such purpose or (ii) following an
electronic or other enrollment procedure determined by the Administrator, in either case on or before a date determined by the Administrator prior to an applicable Enrollment Date. 

6. Contributions. 
 (a)
At the time a Participant enrolls in the Plan pursuant to Section 5, he or she will elect to have Contributions (in the form of payroll deductions or otherwise, to the extent permitted by the Administrator) made on each pay day during the
Offering Period in an amount that the Administrator may establish from time to time, in its discretion and on a uniform and nondiscriminatory basis, for all options to be granted on any Enrollment Date. The Administrator, in its sole discretion, may
permit all Participants in a specified Offering to contribute amounts to the Plan through payment by cash, check or other means set forth in the subscription agreement prior to each Exercise Date of each Purchase Period. A Participant’s
subscription agreement will remain in effect for successive Offering Periods unless terminated as provided in Section 10 hereof. 
 (b)
In the event Contributions are made in the form of payroll deductions, such payroll deductions for a Participant will commence on the first pay day following the Enrollment Date and will end on the last pay day on or prior to the last Exercise Date
of such Offering Period to which such authorization is applicable, unless sooner terminated by the Participant as provided in Section 10 hereof. 

(c) All Contributions made for a Participant will be credited to his or her account under the Plan and Contributions will be made in whole
percentages of his or her Compensation only. 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 under Section 10. Except as may be permitted by the Administrator, as determined in its sole discretion, a Participant may not change the rate of his or her Contributions during an
Offering Period. 
 (e) Notwithstanding the foregoing, to the extent necessary to comply with Section 423(b)(8) of the Code and
Section 3(d), a Participant’s Contributions 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(d) hereof, Contributions will recommence at the rate
originally elected by the Participant effective as of the beginning of the first Purchase Period scheduled to end in the following calendar year, unless terminated by the Participant as provided in Section 10. 

(f) Notwithstanding any provisions to the contrary in the Plan, the Administrator may allow Participants to participate in the Plan via cash
contributions instead of payroll deductions if (i) payroll deductions are not permitted under applicable local law, (ii) the Administrator determines that cash contributions are permissible under Section 423 of the Code; or
(iii) the Participants are participating in the Non-423 Component. 

  
 7 

 (g) At the time the option is exercised, in whole or in part, or at the time some or all of
the Common Stock issued under the Plan is disposed of (or any other time that a taxable event related to the Plan occurs), the Participant must make adequate provision for the Company’s or Employer’s federal, state, local or any other tax
liability payable to any authority including taxes imposed by jurisdictions outside of the U.S., national insurance, social security or other tax withholding obligations, if any, which arise upon the exercise of the option or the disposition of the
Common Stock (or any other time that a taxable event related to the Plan occurs). At any time, the Company or the Employer may, but will not be obligated to, withhold from the Participant’s compensation the amount necessary for the Company or
the Employer to meet applicable withholding obligations, including any withholding required to make available to the Company or the Employer any tax deductions or benefits attributable to sale or early disposition of Common Stock by the Eligible
Employee. In addition, the Company or the Employer may, but will not be obligated to, withhold from the proceeds of the sale of Common Stock or any other method of withholding the Company or the Employer deems appropriate to the extent permitted by
U.S. Treasury Regulation Section 1.423-2(f). 
 7. Grant of Option. On the Enrollment
Date of each Offering Period, each Eligible Employee participating in such Offering Period will 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 Eligible Employee’s Contributions accumulated prior to such Exercise Date and retained in the Eligible Employee’s account as of the Exercise Date by the applicable Purchase Price; provided that in no event
will an Eligible Employee be permitted to purchase during each Purchase Period more than that number of shares of Common Stock determined by the Administrator prior to the applicable Purchase Period (subject to any adjustment pursuant to
Section 19) and provided further that such purchase will be subject to the limitations set forth in Sections 3(d) and 13. The Eligible Employee may accept the grant of such option by electing to participate in the Plan in accordance with the
requirements of Section 5. The Administrator may, for future Offering Periods, increase or decrease, in its absolute discretion, the maximum number of shares of Common Stock that an Eligible Employee may purchase during each Purchase Period.
Exercise of the option will occur as provided in Section 8, unless the Participant has withdrawn pursuant to Section 10. The option will 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
will be exercised automatically on each Exercise Date, and the maximum number of full shares subject to the option will be purchased for such Participant at the applicable Purchase Price with the accumulated Contributions from his or her account. No
fractional shares of Common Stock will be purchased; any Contributions accumulated in a Participant’s account, which are not sufficient to purchase a full share will 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 funds left over in a Participant’s account after the Exercise Date will 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. 

  
 8 

 (b) 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 will 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 will be practicable and as it will 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 will 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 will be practicable and as it will 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 a pro rata allocation of the shares available on the Enrollment Date of any applicable Offering Period pursuant to the preceding sentence, notwithstanding any authorization of additional shares for issuance
under the Plan by the Company’s stockholders subsequent to such Enrollment Date. 
 9. Delivery. As soon as reasonably
practicable after each Exercise Date on which a purchase of shares of Common Stock occurs, the Company will arrange the delivery to each Participant of 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. The Company may permit or require that shares be deposited directly with a broker designated by the Company or to a designated agent of the Company, and the Company may
utilize electronic or automated methods of share transfer. The Company may require that shares be retained with such broker or agent for a designated period of time and/or may establish other procedures to permit tracking of disqualifying
dispositions of such shares. No Participant will have any voting, dividend, or other stockholder rights with 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) A Participant may withdraw all but not less than all the Contributions 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 stock administration office (or its designee) a written notice of withdrawal in the form determined by the Administrator for such purpose (which may be similar to the
form attached hereto as Exhibit B), or (ii) following an electronic or other withdrawal procedure determined by the Administrator. All of the Participant’s Contributions credited to his or her account will be paid to such
Participant promptly after receipt of notice of withdrawal and such Participant’s option for the Offering Period will be automatically terminated, and no further Contributions for the purchase of shares will be made for such Offering Period. If
a Participant withdraws from an Offering Period, Contributions will 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. 

  
 9 

 (b) A Participant’s withdrawal from an Offering Period will not have any effect on his
or her eligibility to participate in any similar plan that may hereafter be adopted by the Company or in succeeding Offering Periods that 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 Eligible Employee, for any reason, he or she will be deemed
to have elected to withdraw from the Plan and the Contributions credited to such Participant’s account during the Offering Period but not yet used to purchase shares of Common Stock under the Plan will 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 will be automatically terminated. Unless otherwise provided by the Administrator, a Participant whose employment transfers
between entities through a termination with an immediate rehire (with no break in service) by the Company or a Designated Company will not be treated as terminated under the Plan; however, if a Participant transfers from an Offering under the 423
Component to the Non-423 Component, the exercise of the option will be qualified under the 423 Component only to the extent it complies with Section 423 of the Code, unless otherwise provided by the
Administrator. 
 12. Interest. No interest will accrue on the Contributions of a participant in the Plan, except as may be required
by Applicable Law, as determined by the Company, and if so required by the laws of a particular jurisdiction, will apply to all Participants in the relevant Offering under the 423 Component, except to the extent otherwise permitted by U.S. Treasury
Regulation Section 1.423-2(f). 
 13. Stock. 

(a) Subject to adjustment upon changes in capitalization of the Company as provided in Section 19 hereof, upon effectiveness of the Plan
as provided in Section 24, the initial maximum number of shares of Common Stock that will be made available for sale under the Plan will be 180,000 shares of Common Stock (the “Initial Share Reserve”). Subject to adjustment
upon changes in capitalization of the Company as provided in Section 19 hereof, upon the filing of the Company’s amended and restated certificate of incorporation with the Secretary of State of the State of Delaware in connection with the
closing of the Company’s initial public offering, the maximum number of shares of Common Stock that will be made available for sale under the Plan will be increased to a total of 460,000 shares of Common Stock, which figure includes the Initial
Share Reserve. The number of shares of Common Stock available for issuance under the Plan will be increased on the first day of each Fiscal Year beginning for the Fiscal Year following the Fiscal Year in which the first Enrollment Date (if any)
occurs equal to the least of (i) 920,000 shares of Common Stock, (ii) 1% of the outstanding shares of Common Stock on the last day of the immediately preceding Fiscal Year, or (iii) an amount determined by the Administrator. 

(b) Until the shares of Common Stock are issued (as evidenced by the appropriate entry on the books of the Company or of a duly authorized
transfer agent of the Company), a Participant will have only the rights of an unsecured creditor with respect to such shares, and no right to vote or receive dividends or any other rights as a stockholder will exist with respect to such shares. 

(c) Shares of Common Stock to be delivered to a Participant under the Plan will be registered in the name of the Participant or in the name of
the Participant and his or her spouse. 

  
 10 

 14. Administration. The Plan will be administered by the Board or a Committee
appointed by the Board, which Committee will be constituted to comply with Applicable Laws. The Administrator will have full and exclusive discretionary authority to construe, interpret and apply the terms of the Plan, to delegate ministerial duties
to any of the Company’s employees, to designate separate Offerings under the Plan, to designate Subsidiaries and Affiliates of the Company as participating in the 423 Component or Non-423 Component, to
determine eligibility, to adjudicate all disputed claims filed under the Plan and to establish such procedures that it deems necessary for the 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 U.S., the terms of which
sub-plans may take precedence over other provisions of this Plan, with the exception of Section 13(a) hereof, but unless otherwise superseded by the terms of such
sub-plan, the provisions of this Plan will govern the operation of such sub-plan). Unless otherwise determined by the Administrator, the Eligible Employees eligible to
participate in each sub-plan will participate in a separate Offering or in the Non-423 Component. Without limiting the generality of the foregoing, the Administrator is
specifically authorized to adopt rules and procedures regarding eligibility to participate, the definition of Compensation, handling of Contributions, making of Contributions to the Plan (including, without limitation, in forms other than payroll
deductions), establishment of bank or trust accounts to hold Contributions, payment of interest, conversion of local currency, obligations to pay payroll tax, determination of beneficiary designation requirements, withholding procedures and handling
of stock certificates that vary with applicable local requirements. The Administrator also is authorized to determine that, to the extent permitted by U.S. Treasury Regulation Section 1.423-2(f), the
terms of an option granted under the Plan or an Offering to citizens or residents of a non-U.S. jurisdiction will be less favorable than the terms of options granted under the Plan or the same Offering to
employees resident solely in the U.S. Every finding, decision, and determination made by the Administrator will, to the full extent permitted by law, be final and binding upon all parties. 

15. Designation of Beneficiary. 

(a) If permitted by the Administrator, a Participant may file a designation of 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, if permitted by the Administrator, a Participant may file a designation of 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 will be required for such designation to be effective. 

(b) Such designation of beneficiary may be changed by the Participant at any time by notice in a form determined by the Administrator. 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 will 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. 

  
 11 

 (c) All beneficiary designations will be in such form and manner as the Administrator may
designate from time to time. Notwithstanding Sections 15(a) and (b) above, the Company and/or the Administrator may decide not to permit such designations by Participants in non-U.S. jurisdictions to the
extent permitted by U.S. Treasury Regulation Section 1.423-2(f). 
 16. Transferability.
Neither Contributions 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 hereof) by the Participant. Any such attempt at assignment, transfer, pledge or other disposition will be without effect, except that the Company may treat
such act as an election to withdraw funds from an Offering Period in accordance with Section 10 hereof. 
 17. Use of Funds. The
Company may use all Contributions received or held by it under the Plan for any corporate purpose, and the Company will not be obligated to segregate such Contributions except under Offerings or for Participants in the
Non-423 Component for which Applicable Laws require that Contributions to the Plan by Participants be segregated from the Company’s general corporate funds and/or deposited with an independent third
party. Until shares of Common Stock are issued, Participants will have only the rights of an unsecured creditor with respect to such shares. 

18. Reports. Individual accounts will be maintained for each Participant in the Plan. Statements of account will be given to
participating Eligible Employees at least annually, which statements will set forth the amounts of Contributions, the Purchase Price, the number of shares of Common Stock purchased and the remaining cash balance, if any. 

19. Adjustments, Dissolution, Liquidation, Merger, or Change in 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 occurs, the Administrator, in order to prevent dilution or enlargement of the benefits or potential benefits
intended to be made available under the Plan, will, in such manner as it may deem equitable, adjust the number and class of Common Stock that 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 that 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, any Offering Period then in progress will be shortened by setting a New Exercise Date, and will terminate immediately prior to the consummation of such
proposed dissolution or liquidation, unless provided otherwise by the Administrator. The New Exercise Date will be before the date of the Company’s proposed dissolution or liquidation. The Administrator will notify each Participant in writing
or electronically, 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 will 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 hereof. 

  
 12 

 (c) Merger or Change in Control. In the event of a merger or Change in Control, each
outstanding option will 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,
the Offering Period with respect to which such option relates will be shortened by setting a New Exercise Date on which such Offering Period will end. The New Exercise Date will occur before the date of the Company’s proposed merger or Change
in Control. The Administrator will notify each Participant in writing or electronically 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 will 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 hereof. 

20. Amendment or Termination. 

(a) The Administrator, in its sole discretion, may amend, suspend, or terminate the Plan, or any part thereof, at any time and for any reason.
If the Plan is terminated, the Administrator, in its discretion, may elect to terminate all outstanding Offering Periods either immediately or upon completion of the purchase of shares of Common Stock on the next Exercise Date (which may be sooner
than originally scheduled, if determined by the Administrator in its discretion), or may elect to permit Offering Periods to expire in accordance with their terms (and subject to any adjustment pursuant to Section 19). If the Offering Periods
are terminated prior to expiration, all amounts then credited to Participants’ accounts that have not been used to purchase shares of Common Stock will be returned to the Participants (without interest thereon, except as otherwise required
under Applicable Laws, as further set forth in Section 12 hereof) as soon as administratively practicable. 
 (b) Without stockholder
consent and without limiting Section 20(a), the Administrator will be entitled to change the Offering Periods or Purchase Periods, designate separate Offerings, 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 Contributions 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 Contribution 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 Contribution amounts, and establish such other limitations or procedures as the Administrator determines in its sole discretion advisable that 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 Administrator may, in its discretion and, to the extent necessary or desirable, modify, amend or terminate the Plan to reduce or eliminate such accounting consequence including, but not limited to: 

(i) amending the Plan to conform with the safe harbor definition under the Financial Accounting Standards Board Accounting Standards
Codification Topic 718 (or any successor thereto), including with respect to an Offering Period underway at the time; 

  
 13 

 (ii) altering the Purchase Price for any Offering Period or Purchase Period including an
Offering Period or Purchase Period underway at the time of the change in Purchase Price; 
 (iii) shortening any Offering Period or
Purchase Period by setting a New Exercise Date, including an Offering Period or Purchase Period underway at the time of the Administrator action; 

(iv) reducing the maximum percentage of Compensation a Participant may elect to set aside as Contributions; and 

(v) reducing the maximum number of shares of Common Stock a Participant may purchase during any Offering Period or Purchase Period. 

Such modifications or amendments will not require stockholder approval or the consent of any Participants. 

21. Notices. All notices or other communications by a Participant to the Company under or in connection with the Plan will be deemed to
have been duly given when received in the form and manner 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 will not be issued with respect to an option unless the exercise of such
option and the issuance and delivery of such shares pursuant thereto will comply with all applicable provisions of law, domestic or foreign, including, without limitation, the U.S. Securities Act of 1933, as amended, the Exchange Act, the rules and
regulations promulgated thereunder, and the requirements of any stock exchange upon which the shares may then be listed, and will 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 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. Code Section 409A. The 423 Component of the Plan is exempt
from the application of Code Section 409A and any ambiguities herein will be interpreted to so be exempt from Code Section 409A. In furtherance of the foregoing and notwithstanding any provision in the Plan to the contrary, if the
Administrator determines that an option granted under the Plan may be subject to Code Section 409A or that any provision in the Plan would cause an option under the Plan to be subject to Code Section 409A, the Administrator may amend the
terms of the Plan and/or of an outstanding option granted under the Plan, or take such other action the Administrator determines is necessary or appropriate, in each case, without the Participant’s consent, to exempt any outstanding

  
 14 

 
option or future option that may be granted under the Plan from or to allow any such options to comply with Code Section 409A, but only to the extent any such amendments or action by the
Administrator would not violate Code Section 409A. Notwithstanding the foregoing, the Company will have no liability to a Participant or any other party if the option to purchase Common Stock under the Plan that is intended to be exempt from or
compliant with Code Section 409A is not so exempt or compliant or for any action taken by the Administrator with respect thereto. The Company makes no representation that the option to purchase Common Stock under the Plan is compliant with Code
Section 409A. 
 24. Term of Plan. The Plan will become effective upon the later to occur of (i) its adoption by the Board
or (ii) the business day immediately prior to the Registration Date. It will continue in effect for a term of twenty (20) years, unless sooner terminated under Section 20. 

25. Stockholder Approval. The Plan will be subject to approval by the stockholders of the Company within twelve (12) months after
the date the Plan is adopted by the Board. Such stockholder approval will be obtained in the manner and to the degree required under Applicable Laws. 

26. Governing Law. The Plan will be governed by, and construed in accordance with, the laws of the State of Delaware (except its choice-of-law provisions). 
 27. No Right to Employment.
Participation in the Plan by a Participant will not be construed as giving a Participant the right to be retained as an employee of the Company or a Subsidiary or Affiliate of the Company, as applicable. Further, the Company or a Subsidiary or
Affiliate of the Company may dismiss a Participant from employment at any time, free from any liability or any claim under the Plan. 
 28.
Severability. If any provision of the Plan is or becomes or is deemed to be invalid, illegal, or unenforceable for any reason in any jurisdiction or as to any Participant, such invalidity, illegality or unenforceability will not affect the
remaining parts of the Plan, and the Plan will be construed and enforced as to such jurisdiction or Participant as if the invalid, illegal or unenforceable provision had not been included. 

29. Compliance with Applicable Laws. The terms of this Plan are intended to comply with all Applicable Laws and will be construed
accordingly. 
 30. Automatic Transfer to Low Price Offering Period. To the extent permitted by Applicable Laws, if the Fair Market
Value on any Exercise Date in an Offering Period is lower than the Fair Market Value on the Enrollment Date of such Offering Period, then all Participants in such Offering Period automatically will be 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 as of the first day thereof. 

  
 15 

 EXHIBIT A 

KODIAK SCIENCES INC. 

2018 EMPLOYEE STOCK PURCHASE PLAN 

SUBSCRIPTION AGREEMENT 
  

			
	             Original Application	  	Offering Date:
                                         
           
	             Change in Payroll Deduction Rate	  	

 1.
                                     (“Employee”)
hereby elects to participate in the Kodiak Sciences Inc. 2018 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.
Unless otherwise defined herein, the terms defined in the 2018 Employee Stock Purchase Plan (the “Plan”) shall have the same defined meanings in this Subscription Agreement. 

2. Employee hereby authorizes payroll deductions from each paycheck in the amount of
            % (from 1% to [    ]%) of his or her Compensation on each payday during the Offering Period in accordance with the Plan. (Please note that no
fractional percentages are permitted.) 
 3. Employee understands that said payroll deductions will be accumulated for the purchase of
shares of Common Stock at the applicable Purchase Price determined in accordance with the Plan. Employee understands that if he or she does not withdraw from an Offering Period, any accumulated payroll deductions will be used to automatically
exercise his or her option and purchase Common Stock under the Plan. 
 4. Employee has received a copy of the complete Plan and its
accompanying prospectus. Employee understands that his or her participation in the Plan is in all respects subject to the terms of the Plan. 

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

6. Employee understands that if he or she disposes of any shares that he or she purchased under the Plan within two (2) years after the
Enrollment Date (the first day of the Offering Period during which he or she purchased such shares) or one (1) year after the applicable Exercise Date, he or she 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 over the price paid for the shares. Employee hereby agrees to notify the Company in writing within
thirty (30) days after the date of any disposition of such shares and to make adequate provision for federal, state or other tax withholding obligations, if any, that arise upon the disposition of such shares. The Company may,
but will not be obligated to, withhold from Employee’s 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 Employee’s sale or early disposition of such shares. Employee understands 

  
 16 

 
that if he or she disposes of such shares at any time after the expiration of the two (2)-year and one-(1) year holding periods, he or she 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 (i) the excess of the fair
market value of the shares at the time of such disposition over the purchase price paid for the shares, or (ii) fifteen percent (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. Employee hereby agrees to be bound by the terms of the Plan. The
effectiveness of this Subscription Agreement is dependent upon Employee’s eligibility to participate in the Plan. 
  

					
	 Employee’s Social

Security Number:
	 		 	 
			
	 Employee’s Address:
	 		 	   

			
	  
	 		 	   

			
	  
	 		 	   

 EMPLOYEE UNDERSTANDS THAT THIS SUBSCRIPTION AGREEMENT WILL REMAIN IN EFFECT THROUGHOUT SUCCESSIVE OFFERING
PERIODS UNLESS TERMINATED BY EMPLOYEE. 
  

					
	Dated:
                                         
                                         
      	 		 	   

		 		 	Signature of Employee

  
 17 

 EXHIBIT B 

KODIAK SCIENCES INC. 

2018 EMPLOYEE STOCK PURCHASE PLAN 

NOTICE OF WITHDRAWAL 

Unless otherwise defined herein, the terms defined in the 2018 Employee Stock Purchase Plan (the “Plan”) shall have the same defined
meanings in this Notice of Withdrawal. 
 The undersigned Participant in the Offering Period of the Kodiak Sciences Inc. 2018 Employee
Stock Purchase Plan that 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 terminated
automatically. 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 will 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:                                     
                                         
           

  
 18

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