Document:

EX-10.2

 Exhibit 10.2 

ALPINE IMMUNE SCIENCES, INC. 

2018 EQUITY INCENTIVE PLAN 

STOCK OPTION AGREEMENT 

Unless otherwise defined herein, the terms defined in the Alpine Immune Sciences, Inc. 2018 Equity Incentive Plan (the “Plan”) will
have the same defined meanings in this Stock Option Agreement including the Notice of Stock Option Grant (the “Notice of Grant”), the Terms and Conditions of Stock Option Grant, and the exhibits attached thereto (all together, the
“Option Agreement”). 
  

	I.	NOTICE OF STOCK OPTION GRANT 

 Participant Name:    

 Address:     

The undersigned (“Participant”) has been granted an Option to purchase Common Stock of Alpine Immune Sciences, Inc. (the
“Company”), subject to the terms and conditions of the Plan and this Option Agreement, as follows: 
  

			
	Grant Number:	  	  

		
	Date of Grant:	  	  

		
	Vesting Commencement Date:	  	  

		
	Exercise Price per Share:	  	 $

		
	Total Number of Shares Granted:	  	  

		
	Total Exercise Price:	  	 $

		
	Type of Option:	  	  

		
	Term/Expiration Date:	  	  

 Vesting Schedule: 

Subject to accelerated vesting as set forth below or in the Plan, this Option will be exercisable, in whole or in part, in accordance with the
following schedule: 
 [Insert vesting schedule] 

  
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 Termination Period: 

This Option will be exercisable for three (3) months after Participant ceases to be a Service Provider, unless such termination is due to
Participant’s death or Disability, in which case this Option will be exercisable for twelve (12) months after Participant ceases to be a Service Provider. Notwithstanding the foregoing sentence, in no event may this Option be exercised
after the Term/Expiration Date as provided above and may be subject to earlier termination as provided in Section 15 of the Plan. 
  

	II.	TERMS AND CONDITIONS OF STOCK OPTION GRANT 

 1.    Grant of
Option. The Company hereby grants to Participant named in the Notice of Stock Option Grant of this Option Agreement (the “Notice of Grant”) an option (the “Option”) to purchase the number of Shares, as set forth in the Notice
of Grant, at the exercise price per Share set forth in the Notice of Grant (the “Exercise Price”), subject to all of the terms and conditions in this Option 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 the terms and conditions of this Option Agreement, the terms and conditions of the Plan will prevail. 

(a)    For U.S. taxpayers, the Option will be designated as either an Incentive Stock Option (“ISO”) or a
Nonstatutory Stock Option (“NSO”). If designated in the Notice of Grant as an ISO, this Option is intended to qualify as an ISO under Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”). However, if
this Option is intended to be an ISO, to the extent that it exceeds the $100,000 rule of Code Section 422(d) it will be treated as an NSO. Further, if for any reason this Option (or portion thereof) will not qualify as an ISO, then, to the
extent of such nonqualification, such Option (or portion thereof) shall be regarded as a NSO granted under the Plan. In no event will the Administrator, the Company or any Parent or Subsidiary or any of their respective employees or directors have
any liability to Participant (or any other person) due to the failure of the Option to qualify for any reason as an ISO. 
 If the Option
grant by its standard terms provides that a certain portion of the grant may not qualify as an ISO as a result of the $100,000 rule, please note that the electronic stock administration platform may bifurcate this Option grant as an ISO and NSO
portion. Please be aware that both portions are part of the same Option grant. 
 (b)    For non-U.S. taxpayers, the Option will be designated as an NSO. 
 2.    Vesting
Schedule. Except as provided in Section 3, the Option awarded by this Option Agreement will vest in accordance with the vesting provisions set forth in the Notice of Grant. Shares scheduled to vest on a certain date or upon the occurrence
of a certain condition will not vest in Participant in accordance with any of the provisions of this Option Agreement, unless Participant will have been continuously a Service Provider from the Date of Grant until the date such vesting occurs. 

3.    Administrator Discretion. The Administrator, in its discretion, may accelerate the vesting of the balance, or
some lesser portion of the balance, of the unvested Option at any time, subject to the terms of the Plan. If so accelerated, such Option will be considered as having vested as of the date specified by the Administrator. 

  
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 4.    Exercise of Option. 

(a)    Right to Exercise. This Option may be exercised only within the term set out in the Notice of Grant, and may
be exercised during such term only in accordance with the Plan and the terms of this Option Agreement. 

(b)    Method of Exercise. This Option is exercisable by delivery of an exercise notice (the “Exercise
Notice”) in the form attached as Exhibit A or such other electronic notification or in a manner and pursuant to such procedures as the Administrator may determine, which will state the election to exercise the Option, the number of
Shares in respect of which the Option is being exercised (the “Exercised Shares”), and such other representations and agreements as may be required by the Company pursuant to the provisions of the Plan. The Exercise Notice will be
completed by Participant and delivered to the Company. The Exercise Notice will be accompanied by payment of the aggregate Exercise Price as to all Exercised Shares together and of any Tax Obligations (as defined in Section 6(a)). This Option
will be deemed to be exercised upon receipt by the Company of such fully executed Exercise Notice accompanied by the aggregate Exercise Price. 

5.    Method of Payment. Payment of the aggregate Exercise Price will be by any of the following, or a combination
thereof, at the election of Participant: 
 (a)    cash; 

(b)    check; or 

(c)    consideration received by the Company under a formal cashless exercise program adopted by the Company in connection
with the Plan. 
 6.    Tax Consequences. Participant has reviewed with its own tax advisors the U.S. federal,
state, local and non-U.S. tax consequences of this investment and the transactions contemplated by this 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 Option Agreement. 
 7.    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 Option, 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 

  
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by the Company or the Service Recipient 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 exercise of the Option 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 Option (or exercise 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 Option, including, but not limited to, the grant, vesting or exercise of the Option,
the subsequent sale of Shares acquired pursuant to such exercise 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 Option 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 the Option is exercised, 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, (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. 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 

  
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(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 any
required Tax Obligations hereunder at the time of the Option exercise, Participant acknowledges and agrees that the Company may refuse to honor the exercise and refuse to deliver the Shares if such amounts are not delivered at the time of exercise.

 (c)    Notice of Disqualifying Disposition of ISO Shares. If the Option granted to Participant herein is an
ISO, and if Participant sells or otherwise disposes of any of the Shares acquired pursuant to the ISO on or before the later of (i) the date two (2) years after the Date of Grant, or (ii) the date one (1) year after the date of
exercise, Participant will immediately notify the Company in writing of such disposition. Participant agrees that Participant may be subject to income tax withholding by the Company on the compensation income recognized by Participant. 

(d)    Code Section 409A. Under Code Section 409A, a stock right (such as the Option) that
vests after December 31, 2004 (or that vested on or prior to such date but which was materially modified after October 3, 2004) that was granted with a per share exercise price that is determined by the Internal Revenue Service (the
“IRS”) to be less than the fair market value of an underlying share on the date of grant (a “discount option”) may be considered “deferred compensation.” A stock right that is a “discount option” may result in
(i) income recognition by the recipient of the stock right prior to the exercise of the stock right, (ii) an additional twenty percent (20%) federal income tax, and (iii) potential penalty and interest charges. The “discount
option” may also result in additional state income, penalty and interest tax to the recipient of the stock right. Participant acknowledges that the Company cannot and has not guaranteed that the IRS will agree that the per Share exercise price
of this Option equals or exceeds the fair market value of a Share on the date of grant in a later examination. Participant agrees that if the IRS determines that the Option was granted with a per Share exercise price that was less than the fair
market value of a Share on the date of grant, Participant shall be solely responsible for Participant’s costs related to such a determination. 

8.    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. 
 9.    No
Guarantee of Continued Service. PARTICIPANT ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES 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 OPTION OR ACQUIRING SHARES HEREUNDER. PARTICIPANT FURTHER ACKNOWLEDGES AND AGREES THAT THIS OPTION AGREEMENT, THE TRANSACTIONS CONTEMPLATED
HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF 

  
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CONTINUED ENGAGEMENT AS A SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND WILL 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. 

10.    Nature of Grant. In accepting the Option, Participant acknowledges, understands and agrees that: 

(a)    the grant of the Option is voluntary and occasional and does not create any contractual or other right to receive
future grants of options, or benefits in lieu of options, even if options have been granted in the past; 
 (b)    all
decisions with respect to future option or other grants, if any, will be at the sole discretion of the Company; 

(c)    Participant is voluntarily participating in the Plan; 

(d)    the Option and any Shares acquired under the Plan are not intended to replace any pension rights or compensation;

 (e)    the Option and Shares acquired under the Plan 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 Shares underlying the
Option is unknown, indeterminable, and cannot be predicted with certainty; 
 (g)    if the underlying Shares do not
increase in value, the Option will have no value; 
 (h)    if Participant exercises the Option and acquires Shares, the
value of such Shares may increase or decrease in value, even below the Exercise Price; 
 (i)    for purposes of the
Option, 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 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 unless otherwise expressly provided
in this Option Agreement (including by reference in the Notice of Grant to other arrangements or contracts) or determined by the Administrator, (i) Participant’s right to vest in the Option 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 Participant’s employment or service agreement, if any, unless Participant is providing bona fide services during such time); and (ii) the period (if any) during

  
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which Participant may exercise the Option after such termination of Participant’s engagement as a Service Provider will commence on the date Participant ceases to actively provide services
and will not be extended by any notice period mandated under employment laws in the jurisdiction where Participant is employed or terms of Participant’s engagement agreement, if any; the Administrator shall have the exclusive discretion to
determine when Participant is no longer actively providing services for purposes of his or her Option grant (including whether Participant may still be considered to be providing services while on a leave of absence and consistent with local law);  
 (j)    unless otherwise provided in the Plan or by the Company in
its discretion, the Option and the benefits evidenced by this Option Agreement do not create any entitlement to have the Option or any such benefits transferred to, or assumed by, another company nor to be exchanged, cashed out or substituted for,
in connection with any corporate transaction affecting the Shares; and 
 (k)    the following provisions apply only if
Participant is providing services outside the United States: 
  

	 	(i)	the Option and the Shares subject to the Option are not part of normal or expected compensation or salary for any purpose; 

  

	 	(ii)	Participant acknowledges and agrees that none of the Company, the Service Recipient, 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 Option or of any amounts due to Participant pursuant to the exercise of the Option or the subsequent sale of any Shares acquired upon exercise; and 

 

	 	(iii)	no claim or entitlement to compensation or damages shall arise from forfeiture of the Option resulting from the termination of Participant’s engagement 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 Option to
which Participant is otherwise not entitled, Participant irrevocably agrees never to institute any claim against the Company, any Parent, any 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. 

11.    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. 

  
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 12.    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 Option Agreement and any other Option 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.  

Participant understands that the Company and the Employer 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 Options 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 recipient’s
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 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 purposes of implementing, administering and managing Participant’s 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 that 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 engagement as a Service Provider and career with the Employer 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
Options 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. 

13.    Address for Notices. Any notice to be given to the Company under the terms of this Option Agreement will be
addressed to the Company at Alpine Immune Sciences, Inc., 201 Elliott Avenue West, Suite 230, Seattle, WA 98119, or at such other address as the Company may hereafter designate in writing. 

  
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 14.    Non-Transferability of
Option. This Option may not be transferred in any manner otherwise than by will or by the laws of descent or distribution and may be exercised during the lifetime of Participant only by Participant. 

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

16.    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 purchase by, or issuance of Shares, to Participant (or his or her estate) hereunder, such purchase or 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 Option 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 exercise of the Option as the Administrator may establish from time to time for reasons of
administrative convenience. 
 17.    Language. If Participant has received this Option 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. 

18.    Interpretation. The Administrator will have the power to interpret the Plan and this Option 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 Shares subject to the
Option 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 Option Agreement. 

19.    Electronic Delivery and Acceptance. The Company may, in its sole discretion, decide to deliver any documents
related to the Option awarded under the Plan or future options 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 on-line or electronic system established and maintained by the Company or a third party designated by the Company. 

  
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 20.    Captions. Captions provided herein are for convenience only and
are not to serve as a basis for interpretation or construction of this Option Agreement. 
 21.    Agreement
Severable. In the event that any provision in this Option Agreement will be held invalid or unenforceable, such provision will be severable from, and such invalidity or unenforceability will not be construed to have any effect on, the remaining
provisions of this Option Agreement. 
 22.    Amendment, Suspension or Termination of the Plan. By accepting this
Option, Participant expressly warrants that he or she has received an Option 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. 
 23.    Governing Law and Venue. This Option Agreement and
the Option are governed by the internal substantive laws, but not the choice of law rules, of Washington. For purposes of litigating any dispute that arises under these Restricted Stock Units or this Agreement, the parties hereby submit to and
consent to the jurisdiction of the State of Washington, and agree that such litigation will be conducted in the courts of King County, Washington, or the federal courts for the United States for the Western District of Washington, and no other
courts, where this 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 Option Agreement shall continue in full force
and effect. 
 24.    Country Addendum. Notwithstanding any provisions in this Option Agreement, this Option shall
be subject to any special terms and conditions set forth in the appendix (if any) to this Option Agreement for Participant’s country (the “Country Addendum”). 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 Option Agreement. 
 25.    Modifications to the Agreement.
This Option Agreement constitutes the entire understanding of the parties on the subjects covered. Participant expressly warrants that he or she is not accepting this Option Agreement in reliance on any promises, representations, or inducements
other than those contained herein. Modifications to this Option 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
Option Agreement, the Company reserves the right to revise this Option Agreement as it deems necessary or advisable, in its sole discretion and without the consent of Participant, to comply with Code Section 409A or to otherwise avoid
imposition of any additional tax or income recognition under Section 409A of the Code in connection with the Option. 

  
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 26.    No Waiver. Either party’s failure to enforce any provision
or provisions of this Option 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 Option 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. 

Participant acknowledges receipt of a copy of the Plan and represents that he or she is familiar with the terms and provisions thereof, and
hereby accepts this Option Agreement subject to all of the terms and provisions thereof. Participant has reviewed the Plan and this Option Agreement in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this
Option Agreement and fully understands all provisions of this Option and the Option Agreement. Participant hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Administrator upon any questions arising
under the Plan or this Option Agreement. Participant further agrees to notify the Company upon any change in the residence address indicated below. 
  

			
	PARTICIPANT	  	ALPINE IMMUNE SCIENCES, INC.
		
	  
	  	  

	Signature	  	Signature
		
	  
	  	  

	Print Name	  	Print Name
		
		  	  

		  	Title
		  	
	Address:	  	
		
	  
	  	
		  	
	  
	  	

  
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 EXHIBIT A 

ALPINE IMMUNE SCIENCES, INC. 

2018 EQUITY INCENTIVE PLAN 

EXERCISE NOTICE 
 Alpine Immune Sciences,
Inc. 
 201 Elliott Avenue West, Suite 230 
 Seattle, WA 98119

 Attention: Stock Administration 

1.    Exercise of Option. Effective as of today,
                                ,
            , the undersigned (“Purchaser”) hereby elects to purchase
                             shares (the “Shares”) of the Common Stock of Alpine Immune
Sciences, Inc. (the “Company”), under and pursuant to the 2018 Equity Incentive Plan (the “Plan”) and the Stock Option Agreement, dated
                 and including the Notice of Grant, the Terms and Conditions of Stock Option Grant, and exhibits attached thereto (the “Option
Agreement”). The purchase price for the Shares will be $                            , as required
by the Option Agreement. 
 2.    Delivery of Payment. Purchaser herewith delivers to the Company the full
purchase price of the Shares and any Tax Obligations (as defined in Section 6(a) of the Option Agreement) to be paid in connection with the exercise of the Option. 

3.    Representations of Purchaser. Purchaser acknowledges that Purchaser has received, read and understood the Plan
and the Option Agreement and agrees to abide by and be bound by their terms and conditions. 
 4.    Rights as
Stockholder. Until the issuance (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company) of the Shares, no right to vote or receive dividends or any other rights as a stockholder
will exist with respect to the Shares subject to the Option, notwithstanding the exercise of the Option. The Shares so acquired will be issued to Purchaser as soon as practicable after exercise of the Option. No adjustment will be made for a
dividend or other right for which the record date is prior to the date of issuance, except as provided in Section 14 of the Plan. 

5.    Tax Consultation. Purchaser understands that Purchaser may suffer adverse tax consequences as a result of
Purchaser’s purchase or disposition of the Shares. Purchaser represents that Purchaser has consulted with any tax consultants Purchaser deems advisable in connection with the purchase or disposition of the Shares and that Purchaser is not
relying on the Company for any tax advice. 

  
 -1- 

 6.    Entire Agreement; Governing Law. The Plan and Option Agreement
are incorporated herein by reference. This Exercise Notice, the Plan and the Option 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 Purchaser with respect to the subject matter hereof, and may not be modified adversely to the Purchaser’s interest except by means of a writing signed by the Company and Purchaser. This Option Agreement is governed
by the internal substantive laws, but not the choice of law rules, of Washington. 
  

			
	Submitted by:	  	Accepted by:
		
	PURCHASER	  	ALPINE IMMUNE SCIENCES, INC.
		
	  
	  	  

	Signature	  	Signature
		
	  
	  	  

	Print Name	  	Print Name
		
		  	  

		  	Title
	Address:	  	
		
	  
	  	
		  	
	  
	  	
		  	
		  	  

		  	Date Received

  
 -2-EX-4.4

 Exhibit 4.4 

ELEVENTH SUPPLEMENTAL INDENTURE 

THIS ELEVENTH SUPPLEMENTAL INDENTURE (this
“Supplemental Indenture”), dated as of January 25, 2017, is by and among (i) Concho Resources Inc., a Delaware corporation (the
“Company”), (ii) Mongoose Minerals LLC (the “New Subsidiary Guarantor”), a Delaware limited liability
company and a subsidiary of the Company, (iii) the existing Subsidiary Guarantors (as defined in the Indenture referred to herein) and (iv) Wells Fargo Bank, National Association, as trustee under the Indenture referred to herein (the
“Trustee”). The New Subsidiary Guarantor and the existing Subsidiary Guarantors are sometimes referred to collectively herein as the “Subsidiary Guarantors,” or individually as a “Subsidiary Guarantor.”

 W I T N E S S E T H 

WHEREAS, the Company and the existing Subsidiary Guarantors have heretofore executed and delivered to the Trustee an indenture, dated as of
September 18, 2009, and a Tenth Supplemental Indenture (herein so called) dated as of December 28, 2016 relating to the 4.375% Senior Notes due 2025 (the “Securities”) of the Company; 

WHEREAS, Section 1117 of the Tenth Supplemental Indenture obligates the Company to cause certain Restricted Subsidiaries to become
Subsidiary Guarantors by executing a supplemental indenture as provided in such Section; and 
 WHEREAS, pursuant to Section 1001 of
the Tenth Supplemental Indenture, the Company, the Subsidiary Guarantors and the Trustee are authorized to execute and deliver this Supplemental Indenture to amend or supplement the Indenture without the consent of any Holder; 

NOW THEREFORE, to comply with the provisions of the Tenth Supplemental Indenture and in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, the New Subsidiary Guarantor, the other Subsidiary Guarantors, the Company and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the
Securities as follows: 
 1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have
the meanings assigned to them in the Tenth Supplemental Indenture. 
 2. AGREEMENT TO
GUARANTEE. The New Subsidiary Guarantor hereby agrees, jointly and severally, with all other Subsidiary Guarantors, to fully and unconditionally Guarantee to each Holder and to the Trustee the Obligations, to the extent set forth in
Article Sixteen of the Tenth Supplemental Indenture and subject to the provisions thereof. The obligations of the Subsidiary Guarantors to the Holders of Securities and to the Trustee pursuant to the Subsidiary Guarantees and the Indenture are
expressly set forth in Article Sixteen of the Tenth Supplemental Indenture and reference is hereby made to such Article for the precise terms of the Subsidiary Guarantees. 

3. NEW YORK LAW TO GOVERN. THE LAWS OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE AND ENFORCE THIS SUPPLEMENTAL INDENTURE.

 4. COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an
original, but all of them together represent the same agreement. 

 This Supplemental Indenture may be executed in multiple counterparts which, when taken together, shall constitute
one instrument. 
 5. EFFECT OF HEADINGS. The Section headings herein are for convenience only
and shall not affect the construction hereof. 
 6. THE TRUSTEE. Except as otherwise expressly provided
herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed, by the Trustee by reason of this Supplemental Indenture. This Supplemental Indenture is executed and accepted by the Trustee subject to all the
terms and conditions set forth in the Indenture with the same force and effect as if those terms and conditions were repeated at length herein and made applicable to the Trustee with respect hereto. 

[Remainder of Page Intentionally Left Blank. Signature Page Follows.] 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed and attested, all as of the date first above written. 
  

			
	MONGOOSE MINERALS LLC
		
	By:	 	/s/ Jack F. Harper
	Name:	 	Jack F. Harper
	Title:	 	 Executive Vice President and
 Chief Financial
Officer

	
	COG HOLDINGS LLC
	COG OPERATING LLC
	COG PRODUCTION LLC
	COG REALTY LLC
	CONCHO OIL & GAS LLC
	DELAWARE RIVER SWD LLC
	QUAIL RANCH LLC
	COG ACREAGE LP

 
			
	By:	 	 COG Production LLC,
 its General
Partner

 
			
		
	By:	 	/s/ Jack F. Harper
	Name:	 	Jack F. Harper
	Title:	 	 Executive Vice President and
 Chief Financial
Officer

	
	CONCHO RESOURCES INC.
		
	By:	 	/s/ Jack F. Harper
	Name:	 	Jack F. Harper
	Title:	 	 Executive Vice President and
 Chief Financial
Officer

	
	WELLS FARGO BANK, NATIONAL ASSOCIATION, as Trustee

 
			
		
	By:	 	 /s/ John Stohlmann

		 	Authorized Signatory

 SIGNATURE PAGE TO ELEVENTH
SUPPLEMENTAL INDENTURE

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