Document:

EX-10.4

 Exhibit 10.4 

Atlassian Corporation 

AMENDED AND RESTATED 2013 U.S. SHARE OPTION PLAN 

1. Purposes of the Plan. The purposes of this Amended and Restated 2013 U.S. Share Option Plan are to attract and retain
the best available personnel for positions of substantial responsibility, to provide additional incentive to Employees and Consultants, and to promote the success of the Company’s business. Options granted under the Plan (defined below) may be
Incentive Stock Options or Nonstatutory Stock Options, as determined by the Administrator at the time of grant of an Option and subject to the applicable provisions of Section 422 of the Code and the regulations promulgated thereunder. The Plan
reflects an amendment and restatement of the Atlassian Corporation Plc 2013 U.S. Share Option Plan (“Plc Plan”), primarily to reflect the assumption of the Plc Plan and as well as, each Option Agreement, in each case, as of
immediately prior to the domiciliation of Atlassian Corporation Plc (“Atlassian UK”) from the United Kingdom to the United States effective as of September 30, 2022 (the “Redomicile”) and to provide for each
reference to Atlassian UK and its Class A ordinary shares and Class B ordinary shares to refer to the Company and its Class A Common Stock and Class B Common Stock (as defined below), respectively, and to reflect the assumption
of all other obligations of Atlassian UK in connection with the Redomicile, and shall be construed accordingly. 
 2.
Definitions. As used herein, the following definitions shall apply: 
 (a) “Administrator”
means the Board or a Committee. 
 (b) “Affiliate” means an entity other than a Subsidiary which, together
with the Company, is under common control of a third person or entity. 
 (c) “Applicable Laws” means all
applicable law, including without limitation: (i) provisions of the Code, the Securities Act, the Exchange Act and any rules or regulations thereunder; (ii) corporate, securities, tax or other laws, statutes, rules, requirements or
regulations, whether U.S. or non-U.S., federal, state or local; and (iii) rules of any securities exchange or automated quotation system on which the Shares are listed, quoted or traded. 

(d) “Award” means any award of an Option under the Plan and including any of the Award granted under the Plc
Plan prior to the Redomicile. 
 (e) “Board” means the Board of Directors of the Company. 

(f) “California Participant” means a Participant whose Award is issued in reliance on Section 25102(o) of
the California Corporations Code. 
 (g) “Cashless Exercise” means a program approved by the Administrator in
which payment of the Option exercise price or tax withholding obligations may be satisfied, in whole or in part, with Shares subject to the Option, including by delivery of an irrevocable direction to a securities broker (on a form prescribed by the
Administrator) to sell Shares and to deliver all or part of the sale proceeds to the Company in payment of the aggregate exercise price and, if applicable, the amount necessary to satisfy the Company’s withholding obligations. 

 (h) “Cause” for termination of a Participant’s Continuous
Service Status will exist (unless another definition is provided in an applicable Option Agreement, employment agreement or other applicable written agreement (including any such agreement entered into between a Participant and Atlassian UK) if the
Participant’s Continuous Service Status is terminated for any of the following reasons: (i) Participant’s willful failure to perform his or her duties and responsibilities to the Company or Participant’s violation of any written
Company policy; (ii) Participant’s commission of any act of fraud, embezzlement, dishonesty or any other willful misconduct that has caused or is reasonably expected to result in injury to the Company; (iii) Participant’s
unauthorized use or disclosure of any proprietary information or trade secrets of the Company or any other party to whom the Participant owes an obligation of nondisclosure as a result of his or her relationship with the Company; or
(iv) Participant’s material breach of any of his or her obligations under any written agreement or covenant with the Company. The determination as to whether a Participant’s Continuous Service Status has been terminated for Cause
shall be made in good faith by the Company and shall be final and binding on the Participant. The foregoing definition does not in any way limit the Company’s ability to terminate a Participant’s employment or consulting relationship at
any time, and the term “Company” will be interpreted to include any Subsidiary, Parent, Affiliate, or any successor thereto, if appropriate. 

(i) “Class A Common Stock” means Class A common stock, par value US$0.00001 per
share, of the Company. 
 (j) “Class B Common Stock” means Class B common
stock, par value US$0.00001 per share, of the Company. 
 (k) “Code” means the Internal Revenue Code of 1986,
as amended. 
 (l) “Committee” means one or more committees or subcommittees of the Board consisting of two
(2) or more Directors (or such lesser or greater number of Directors as shall constitute the minimum number permitted by Applicable Laws to establish a committee or sub-committee of the Board) appointed
by the Board to administer the Plan in accordance with Section 4 below. 
 (m) “Common Stock” means Class A
Common Stock or Class B Common Stock. 
 (n) “Company” means Atlassian Corporation, a Delaware
corporation. 
 (o) “Consultant” means any person, including an advisor but not an Employee, who is engaged by
the Company, or any Parent, Subsidiary or Affiliate, to render services (other than capital-raising services) and is compensated for such services, and any Director whether compensated for such services or not. 

 (p) “Continuous Service Status” means the absence of any
interruption or termination of service as an Employee or Consultant. Continuous Service Status as an Employee or Consultant shall not be considered interrupted or terminated in the case of: (i) Company approved sick leave; (ii) military
leave; (iii) any other bona fide leave of absence approved by the Administrator, provided that such leave is for a period of not more than ninety (90) days, unless reemployment upon the expiration of such leave is guaranteed by
contract or statute, or unless provided otherwise pursuant to a written Company policy. Also, Continuous Service Status as an Employee or Consultant shall not be considered interrupted or terminated in the case of a transfer between locations of the
Company or between the Company, Atlassian UK or its Parents, Subsidiaries or Affiliates, or their respective successors, or a change in status from an Employee to a Consultant or from a Consultant to an Employee. 

(q) “Director” means a member of the Board. 

(r) “Disability” means “disability” within the meaning of Section 22(e)(3) of the Code. 

(s) “Employee” means any person employed by the Company, or any Parent, Subsidiary or Affiliate, with the status
of employment determined pursuant to such factors as are deemed appropriate by the Administrator in its sole discretion, subject to any requirements of the Applicable Laws, including the Code. The payment by the Company of a director’s fee
shall not be sufficient to constitute “employment” of such director by the Company or any Parent, Subsidiary or Affiliate. 
 (t)
“Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder. 

(u) “Fair Market Value” means, as of any date, the per share fair market value of Common Stock, as determined by
the Administrator in good faith on such basis as it deems appropriate and applied consistently with respect to Participants and in accordance with the requirements of Section 409A of the Code. Whenever possible, the determination of Fair Market
Value shall be based upon the per share closing price for the Shares as reported in the Wall Street Journal or comparable publication for the applicable date. 

(v) “Family Members” means any child, stepchild, grandchild, parent, stepparent, grandparent, spouse, former
spouse, sibling, niece, nephew, mother-in-law, father-in-law, son-in-law, daughter-in-law,
brother-in-law, or sister-in-law (including adoptive relationships) of the Optionee, any
person sharing the Optionee’s household (other than a tenant or employee), a trust in which these persons (or the Optionee) have more than 50% of the beneficial interest, a foundation in which these persons (or the Optionee) control the
management of assets, and any other entity in which these persons (or the Optionee) own more than 50% of the voting interests, but only to the extent that any of the foregoing is a “family member” for purposes of Rule 701 of the Securities
Act. 
 (w) “Incentive Stock Option” means an Option intended to qualify as an incentive stock option within
the meaning of Section 422 of the Code, as designated in the applicable Option Agreement. 
 (x) “Listed
Security” means any security of the Company that is listed or approved for listing on a national securities exchange or designated or approved for designation as a national market system security on an interdealer quotation system by
the National Association of Securities Dealers, Inc. 

 (y) “Nonstatutory Stock Option” means an Option that by its
terms does not qualify or is not intended to qualify as an Incentive Stock Option, as designated in the applicable Option Agreement. 
 (z)
“Option” means a stock option granted pursuant to the Plan. 
 (aa) “Option
Agreement” means a written document, the form(s) of which shall be approved from time to time by the Administrator, reflecting the terms of an Option granted under the Plan and includes any documents attached to or incorporated
into such Option Agreement, including, but not limited to, a notice of stock option grant and a form of exercise notice and shall include any option agreement entered into between a Participant and Atlassian UK under the Plc Plan prior to the
Redomicile, each of which have been assumed by the Company. 
 (bb) “Option Exchange Program” means a program
approved by the Administrator whereby outstanding Options (i) are exchanged for Options with a lower exercise price or (ii) are amended to decrease the exercise price as a result of a decline in the Fair Market Value of Common Stock. 

(cc) “Optioned Share” means a share of Common Stock that is subject to an Option or that was issued pursuant to
the exercise of an Option. 
 (dd) “Optionee” means an Employee or Consultant who receives an Option. 

(ee) “Parent” means any corporation (other than the Company) in an unbroken chain of corporations ending with
the Company if, at the time of grant of the Award, each of the corporations other than the Company owns stock possessing more than 50% of the total combined voting power of all classes of stock in one of the other corporations in such chain. A
corporation that attains the status of a Parent on a date after the adoption of the Plan shall be considered a Parent commencing as of such date. 

(ff) “Participant” means any holder of one or more Awards or Shares issued pursuant to an Award. 

(gg) “Plan” means the Atlassian Corporation Amended and Restated 2013 U.S. Share Option Plan, as may be further
amended from time to time. Unless otherwise clearly required by the context, references to the “Plan” herein shall include the Plc Plan, as amended and restated herein. 

(hh) “Rule 16b-3” means Rule
16b-3 promulgated under the Exchange Act, as amended from time to time, or any successor provision. 

(ii) “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations thereunder.

 (jj) “Share” means a share of Common Stock of the Company, as
adjusted in accordance with Section 13 below. 
 (kk) “Stockholder” means a person who is the registered
holder of a Share. 
 (ll) “Stock Exchange” means any stock exchange or consolidated stock price reporting
system on which prices for a share of Common Stock is quoted at any given time. 
 (mm) “Subsidiary” means any
corporation (other than the Company) in an unbroken chain of corporations beginning with the Company if, at the time of grant of the Award, each of the corporations other than the last corporation in the unbroken chain owns stock possessing more
than 50% of the total combined voting power of all classes of stock in one of the other corporations in such chain. A corporation that attains the status of a Subsidiary on a date after the adoption of the Plan shall be considered a Subsidiary
commencing as of such date. 
 (nn) “Ten Percent Holder” means a person who owns stock representing more than
10% of the voting power of all classes of stock of the Company or any Parent or Subsidiary measured as of an Award’s date of grant. 

3. Shares Subject to the Plan. Subject to the provisions of Section 13 of the Plan, the maximum aggregate
number of Shares that may be issued under the Plan is 13,000,000 Shares, of which a maximum of 13,000,000 Shares may be issued under the Plan pursuant to Incentive Stock Options. The Shares issued under the Plan may be authorized, but unissued, or
reacquired Shares. If an Award should expire or become unexercisable for any reason without having been exercised in full, or is surrendered pursuant to an Option Exchange Program, the unpurchased Shares that were subject thereto shall, unless the
Plan shall have been terminated, become available for future grant under the Plan. In addition, any Shares which are retained by the Company upon exercise of an Award in order to satisfy the exercise or purchase price for such Award or any
withholding taxes due with respect to such Award shall be treated as not issued and shall continue to be available under the Plan and Shares issued under the Plan and later repurchased by the Company at the original purchase price paid for the
Shares (including, without limitation, upon repurchase by the Company in connection with the termination of Participant’s Continuous Service Status) shall again be available for future grant under the Plan. Shares issued under the Plan and
later repurchased by the Company pursuant to any repurchase right that the Company may have shall not be available for future grant under the Plan. The Company may satisfy its obligation to issue Shares under the Plan by procuring the creation,
delivery or transfer to the Participant of the Shares which would otherwise be issued to the Participant. 
 4. Administration
of the Plan. 
 (a) General. The Plan shall be administered by the Board or a Committee, or a combination thereof, as
determined by the Board. The Plan may be administered by different administrative bodies with respect to different classes of Participants and, if permitted by Applicable Laws, the Board may authorize one or more officers of the Company to make
Awards under the Plan to Employees and Consultants (who are not subject to Section 16 of the Exchange Act) within parameters specified by the Board. 

 (b) Committee Composition. If a Committee has been appointed pursuant to this
Section 4, such Committee shall continue to serve in its designated capacity until otherwise directed by the Board. From time to time the Board may increase the size of any Committee and appoint additional members thereof, remove members (with
or without cause) and appoint new members in substitution therefor, fill vacancies (however caused) and dissolve a Committee and thereafter directly administer the Plan, all to the extent permitted by the Applicable Laws and, in the case of a
Committee administering the Plan in accordance with the requirements of Rule 16b-3 or Section 162(m) of the Code, to the extent permitted or required by such provisions. 

(c) Powers of the Administrator. Subject to the provisions of the Plan and, in the case of a Committee, the specific duties
delegated by the Board to such Committee, the Administrator shall have the authority, in its sole discretion: 
 (i) to determine the Fair
Market Value of Common Stock in accordance with Section (s) above, provided that such determination shall be applied consistently with respect to Participants under the Plan; 

(ii) to select the Employees and Consultants to whom Awards may from time to time be granted. In addition, the Administrator may select for
the grant of an Award any holder of awards granted under the Atlassian Corporation Pty Limited 2010 U.S. Share Option Plan established by Atlassian Corporation Pty Ltd (ACN 122 325 777) (“Atlassian Australia”) (such holders, the
“Pre-Scheme Optionholders”). The provisions in Section 8 below shall apply to the grant of any such Awards (“Pre-Scheme Awards”)
to Pre-Scheme Optionholders under the scheme of arrangement between the Company and the Pre-Scheme Optionholders pursuant to Part 5.1 of the Corporations Act 2001 (Cth)
referred to in the scheme booklet prepared by Atlassian Australia and dated on or about 13 December 2013 (“Schemes”); 

(iii) to determine the number of Shares to be covered by each Award; 

(iv) to approve the form(s) of agreement(s) and other related documents used under the Plan; 

(v) to determine the terms and conditions, not inconsistent with the terms of the Plan, of any Award granted hereunder, which terms and
conditions include but are not limited to the exercise or purchase price, the time or times when Awards may vest and/or be exercised (which may be based on performance criteria), the circumstances (if any) when vesting will be accelerated or
forfeiture restrictions will be waived, and any restriction or limitation regarding any Award or Optioned Share; 
 (vi) to amend any
outstanding Award or agreement related to any Optioned Share, including any amendment adjusting vesting (e.g., in connection with a change in the terms or conditions under which such person is providing services to the Company), provided that no
amendment shall be made that would materially and adversely affect the rights of any Participant without his or her consent; 

 (vii) to determine whether and under what circumstances an Option may be settled in cash
under Section 10(c) instead of Common Stock; 
 (viii) subject to Applicable Laws, to implement an Option Exchange Program and
establish the terms and conditions of such Option Exchange Program without the consent of the holders of capital stock of the Company, provided that no amendment or adjustment to an Option that would materially and adversely affect the rights of any
Participant shall be made without his or her consent; 
 (ix) to grant Awards to, or to modify the terms of any outstanding Option Agreement
or any agreement related to any Optioned Share held by, Participants who are foreign nationals or employed outside of the United States with such terms and conditions as the Administrator deems necessary or appropriate to accommodate differences in
local law, tax policy or custom which deviate from the terms and conditions set forth in this Plan to the extent necessary or appropriate to accommodate such differences; and 

(x) to construe and interpret the terms of the Plan, any Option Agreement and any agreement related to any Optioned Share, which
constructions, interpretations and decisions shall be final and binding on all Participants. 
 (d) Indemnification. To the
maximum extent permitted by Applicable Laws, each member of the Committee (including officers of the Company, if applicable), or of the Board, as applicable, shall be indemnified and held harmless by the Company against and from (i) any loss,
cost, liability, or expense that may be imposed upon or reasonably incurred by him or her in connection with or resulting from any claim, action, suit, or proceeding to which he or she may be a party or in which he or she may be involved by reason
of any action taken or failure to act under the Plan or pursuant to the terms and conditions of any Award except for actions taken in bad faith or failures to act in bad faith, and (ii) any and all amounts paid by him or her in settlement
thereof, with the Company’s approval, or paid by him or her in satisfaction of any judgment in any such claim, action, suit, or proceeding against him or her, provided that such member shall give the Company an opportunity, at its own expense,
to handle and defend any such claim, action, suit or proceeding before he or she undertakes to handle and defend it on his or her own behalf. The foregoing right of indemnification shall not be exclusive of any other rights of indemnification to
which such persons may be entitled under the Company’s Certificate of Incorporation or Bylaws, as in effect from time to time, by contract, as a matter of law, or otherwise, or under any other power that the Company may have to indemnify or
hold harmless each such person. 
 5. Eligibility. 

(a) Recipients of Grants. Nonstatutory Stock Options may be granted to Employees and Consultants and any other individual
specified in the provisions of Section 4(c)(ii) above. Incentive Stock Options may be granted only to Employees, provided that Employees of Affiliates shall not be eligible to receive Incentive Stock Options. 

(b) Type of Option. Each Option shall be designated in the Option Agreement as either an Incentive Stock Option or a Nonstatutory
Stock Option. 

 (c) ISO $100,000 Limitation. Notwithstanding any designation under
Section 5(b), to the extent that the aggregate Fair Market Value of Shares with respect to which Options designated as Incentive Stock Options are exercisable for the first time by any Optionee during any calendar year (under all plans of the
Company or any Parent or Subsidiary) exceeds $100,000, such excess Options shall be treated as Nonstatutory Stock Options. For purposes of this Section 5(c), Incentive Stock Options shall be taken into account in the order in which they were
granted, and the Fair Market Value of the Shares subject to an Incentive Stock Option shall be determined as of the date of the grant of such Option, and the calculation will be performed in accordance with Section 422 of the Code and the
regulations promulgated thereunder. 
 (d) No Employment Rights. Neither the Plan nor any Award shall confer upon any Employee
or Consultant any right with respect to continuation of an employment or consulting relationship with the Company (any Parent or Subsidiary), nor shall it interfere in any way with such Employee’s or Consultant’s right or the
Company’s (Parent’s or Subsidiary’s) right to terminate his or her employment or consulting relationship at any time, with or without Cause. 

6. Term of Plan. The Plan shall become effective upon its adoption by the Board of Directors. It shall continue in effect
for a term of ten (10) years unless sooner terminated under Section 15 below. 
 7. Term of Option. The term
of each Option shall be the term stated in the Option Agreement; provided that the term shall be no more than seven (7) years from the date of grant thereof or such shorter term as may be provided in the Option Agreement and provided further
that, in the case of an Incentive Stock Option granted to a person who at the time of such grant is a Ten Percent Holder, the term of the Option shall be five (5) years from the date of grant thereof or such shorter term as may be provided in
the Option Agreement. 
 8. Australian scheme. Despite any other rule in this Plan, or any other terms and conditions
governing Awards or Optioned Shares (as contained in any other document or otherwise), Pre-Scheme Awards (as defined in Section 4(c)(ii) above): 

(1) are subject to the terms and conditions contained in this Plan; 

(2) are deemed to have the same grant date which applied to the relevant award in Atlassian Australia (“Equivalent Atlassian Australia
Award”) that was cancelled, and in respect of which such Pre-Scheme Award was provided as consideration by the Company, when the Schemes became effective (as contained in the relevant Option Agreement
of such Equivalent Atlassian Australia Award); 
 (3) have the exercise price and expiry date set out in the relevant Scheme (as defined in
Section 4(c)(ii) above), such exercise price and expiry date being the same as applied to the Equivalent Atlassian Australia Award (as contained in the relevant Option Agreement of such Equivalent Atlassian Australia Award); and 

(4) are deemed to have the same vesting schedule (and any other terms governing vesting, including any terms permitting any acceleration of
vesting) which applied to the Equivalent Atlassian Australia Award prior to the Schemes becoming effective (as contained in the relevant Option Agreement of such Equivalent Atlassian Australia Award), and any unvested
Pre-Scheme Awards will vest in accordance with such vesting schedule and terms. 

 9. Option Exercise Price and Consideration. 

(a) Exercise Price. The per Share exercise price for the Shares to be issued pursuant to the exercise of an Option shall
be such price as is determined by the Administrator and set forth in the Option Agreement, but shall be subject to the following: 
 (i) In
the case of an Incentive Stock Option 
 (A) granted to an Employee who at the time of grant is a Ten Percent Holder, the per Share exercise
price shall be no less than 110% of the Fair Market Value on the date of grant; 
 (B) granted to any other Employee, the per Share exercise
price shall be no less than 100% of the Fair Market Value on the date of grant; 
 (ii) Except as provided in subsection (iii) below,
in the case of a Nonstatutory Stock Option the per Share exercise price shall be such price as is determined by the Administrator, provided that, if the per Share exercise price is less than 100% of the Fair Market Value on the date of grant, it
shall otherwise comply with all Applicable Laws, including Section 409A of the Code; 
 (iii) In the case of a Nonstatutory Stock
Option that is intended to qualify as performance-based compensation under Section 162(m) of the Code and is granted on or after the date, if ever, on which a share of Common Stock becomes a Listed Security, the per Share exercise price shall
be no less than 100% of the Fair Market Value on the date of grant; and 
 (iv) Notwithstanding the foregoing, Options may be granted with a
per Share exercise price other than as required above pursuant to a merger or other corporate transaction. 
 (b) Permissible
Consideration. The consideration to be paid for the Shares to be issued upon exercise of an Option, including the method of payment, shall be determined by the Administrator (and, in the case of an Incentive Stock Option and to the extent
required by Applicable Laws, shall be determined at the time of grant) and may consist entirely of (1) cash; (2) check; (3) to the extent permitted under Applicable Laws, delivery of a promissory note with such recourse, interest, security
and redemption provisions as the Administrator determines to be appropriate; (4) cancellation of indebtedness; (5) other previously owned Shares that have a Fair Market Value on the date of surrender equal to the aggregate exercise price
of the Shares as to which the Option is exercised; (6) a Cashless Exercise; (7) such other consideration and method of payment permitted under Applicable Laws; or (8) any combination of the foregoing methods of payment. In making its
determination as to the type of consideration to accept, the Administrator shall consider if acceptance of such consideration may be reasonably expected to benefit the Company and the Administrator may, in its sole discretion, refuse to accept a
particular form of consideration at the time of any Option exercise. 

 10. Exercise of Option. 

(a) General. 
 (i)
Exercisability. Any Option granted hereunder shall be exercisable at such times and under such conditions as determined by the Administrator, consistent with the terms of the Plan and reflected in the Option Agreement, including
vesting requirements and/or performance criteria with respect to the Company, and Parent or Subsidiary, and/or the Optionee. 
 (ii)
Leave of Absence. Vesting of Options shall be tolled during any unpaid leave of absence which is approved by the Company (unless otherwise required by the Applicable Laws). If such leave period includes part of a month, no vesting of
Optionee’s Options will occur for that month. Notwithstanding the foregoing, in the event of military leave, vesting shall toll during any unpaid portion of such leave, provided that, upon a Optionee’s returning from military leave (under
conditions that would entitle him or her to protection upon such return under the Uniform Services Employment and Reemployment Rights Act), he or she shall be given vesting credit with respect to Options to the same extent as would have applied had
the Optionee continued to provide services to the Company (or any Parent or Subsidiary, if applicable) throughout the leave on the same terms as he or she was providing services immediately prior to such leave. Vesting of Options may continue during
a period of leave, if Optionee continues to be paid by the Company during such leave. If Optionee is paid a portion of his or her salary during a period of leave, Optionee’s Options will vest over the leave period pro rata to the proportion of
the Optionees’ salary that is paid. 
 (iii) Minimum Exercise Requirements. An Option may not be exercised for a fraction
of a Share. The Administrator may require that an Option be exercised as to a minimum number of Shares, provided that such requirement shall not prevent an Optionee from exercising the full number of Shares as to which the Option is then
exercisable. 
 (iv) Procedures for and Results of Exercise. An Option shall be deemed exercised when written notice of such
exercise has been received by the Company in accordance with the terms of the Option Agreement by the person entitled to exercise the Option, the Company has received full payment for the Shares with respect to which the Option is exercised and has
paid, or made arrangements to satisfy, any applicable withholding requirements in accordance with Section 11 below. The exercise of an Option shall result in a decrease in the number of Shares that thereafter may be available, both for purposes
of the Plan and for sale under the Option, by the number of Shares as to which the Option is exercised. 
 (v) Rights as Holder of
Capital Shares. Until the issuance of the Shares (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company), no right to vote or receive dividends or any other rights as a holder
of capital shares shall exist with respect to the Optioned Share, notwithstanding the 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 the stock certificate is issued,
except as provided in Section 13 below. 

 (b) Termination of Employment or Consulting Relationship. The Administrator
shall establish and set forth in the applicable Option Agreement the terms and conditions upon which an Option shall remain exercisable, if at all, following termination of an Optionee’s Continuous Service Status, which provisions may be waived
or modified by the Administrator at any time. To the extent that an Option Agreement does not specify the terms and conditions upon which an Option shall terminate upon termination of an Optionee’s Continuous Service Status, the following
provisions shall apply: 
 (i) General Provisions. If the Optionee (or other person entitled to exercise the Option) does not
exercise the Option to the extent so entitled within the time specified below, the Option shall terminate and the Optioned Share underlying the unexercised portion of the Option shall revert to the Plan. In no event may any Option be exercised after
the expiration of the Option term as set forth in the Option Agreement (and subject to Section 7). 
 (ii) Termination other than
Upon Disability or Death or for Cause. In the event of termination of an Optionee’s Continuous Service Status other than under the circumstances set forth in subsections (iii) through (v) below, such Optionee may exercise any
outstanding Option at any time within three (3) months following such termination to the extent the Optionee is vested in the Optioned Share. 

(iii) Disability of Optionee. In the event of termination of an Optionee’s Continuous Service Status as a result of
his or her Disability, such Optionee may exercise any outstanding Option at any time within six (6) months following such termination to the extent the Optionee is vested in the Optioned Share. 

(iv) Death of Optionee. In the event of the death of an Optionee during the period of Continuous Service Status since the date
of grant of any outstanding Option, or within six (6) months following termination of Optionee’s Continuous Service Status, the Option may be exercised by any beneficiary designated in accordance with Section 17 below, or if there are
no such beneficiaries, by the Optionee’s estate, or by a person who acquired the right to exercise the Option by bequest or inheritance, at any time within six (6) months following the date of death or, if earlier, the date the
Optionee’s Continuous Service Status terminated, but only to the extent the Optionee is vested in the Optioned Share. 
 (v)
Termination for Cause. In the event of termination of an Optionee’s Continuous Service Status for Cause, any outstanding Option (including any vested portion thereof) held by such Optionee shall immediately terminate in its
entirety upon first notification to the Optionee of termination of the Optionee’s Continuous Service Status for Cause. If an Optionee’s Continuous Service Status is suspended pending an investigation of whether the Optionee’s
Continuous Service Status will be terminated for Cause, all the Optionee’s rights under any Option, including the right to exercise the Option, shall be suspended during the investigation period. Nothing in this Section 10(b)(v) shall in
any way limit the Company’s right to purchase unvested Shares issued upon exercise of an Option as set forth in the applicable Option Agreement. 

(c) Buyout Provisions. The Administrator may at any time offer to buy out for a payment in cash or Shares an Option previously
granted under the Plan based on such terms and conditions as the Administrator shall establish and communicate to the Optionee at the time that such offer is made. 

 11. Taxes. 

(a) As a condition of the grant, vesting and exercise of an Award, the Participant (or in the case of the Participant’s death or a
permitted transferee, the person holding or exercising the Award) shall make such arrangements as the Administrator may require for the satisfaction of any applicable U.S. federal, state or local tax withholding obligations or foreign tax
withholding obligations that may arise in connection with such Award. The Company shall not be required to issue any Shares under the Plan until such obligations are satisfied. 

(b) The Administrator may permit a Participant (or in the case of the Participant’s death or a permitted transferee, the person holding or
exercising the Award) to satisfy all or part of his or her tax withholding obligations by Cashless Exercise or by surrendering Shares (either directly or by stock attestation) that he or she previously acquired; provided that, unless the Cashless
Exercise is an approved broker-assisted Cashless Exercise, the Shares tendered for payment have been previously held for a minimum duration (e.g., to avoid financial accounting charges to the Company’s earnings), or as otherwise permitted to
avoid financial accounting charges under applicable accounting guidance, amounts withheld shall not exceed the amount necessary to satisfy the Company’s tax withholding obligations at the minimum statutory withholding rates, including, but not
limited to, U.S. federal and state income taxes, payroll taxes, and foreign taxes, if applicable. Any payment of taxes by surrendering Shares to the Company may be subject to restrictions, including, but not limited to, any restrictions required by
rules of the Securities and Exchange Commission. 
 12. Non-Transferability of
Options. 
 (a) General. Except as set forth in this Section 12, Options may not be sold, pledged, assigned,
hypothecated, transferred or disposed of in any manner other than by will or by the laws of descent or distribution. The designation of a beneficiary by an Optionee will not constitute a transfer. An Option may be exercised, during the lifetime of
the holder of the Option, only by such holder or a transferee permitted by this Section 12. 
 (b) Limited Transferability
Rights. Notwithstanding anything else in this Section 12, the Administrator may in its sole discretion grant Nonstatutory Stock Options that may be transferred by instrument to an inter vivos or testamentary trust in which the Options
are to be passed to beneficiaries upon the death of the trustor (settlor) or by gift to Family Members. Notwithstanding the foregoing, beginning with (i) the period when the Company begins to rely on the exemption described in Rule 12h-1(f)(1) promulgated under the Exchange Act, as determined by the Board in its sole discretion, and (ii) ending on the earlier of (A) the date when the Company ceases to rely on such exemption, as
determined by the Board in its sole discretion, or (B) the date when the Company becomes subject to the reporting requirements of Section 13 or 15(d) of the Exchange Act, an Option, or prior to exercise, the Shares subject to the Option,
may not be pledged, hypothecated or otherwise transferred or disposed of, in any manner, including by entering into any short position, any “put equivalent position” or any “call equivalent position” (as defined in Rule 16a-1(h) and Rule 16a-1(b) of the Exchange Act, 

 
respectively), other than to (i) persons who are Family Members through gifts or domestic relations orders, or (ii) to an executor or guardian of the Participant upon the death or
disability of the Participant. Notwithstanding the foregoing sentence, the Board, in its sole discretion, may permit transfers to the Company or in connection with a Corporate Transaction (as defined below) or other acquisition transactions
involving the Company to the extent permitted by Rule 12h-1(f) of the Exchange Act. 
 13.
Adjustments Upon Changes in Capitalization, Merger or Certain Other Transactions and Post-listing Lock-up. 

(a) Changes in Capitalization. Subject to any action required under Applicable Laws by the holders of capital stock of the
Company, (i) the numbers and class of Shares or other stock or securities: (y) available for future Awards under Section 3 above and (z) covered by each outstanding Award, (ii) the price per Share covered by each such
outstanding Option, and (iii) any repurchase price per Share applicable to Shares issued pursuant to any Award, shall be proportionately adjusted by the Administrator in the event of a stock split, reverse stock split, stock dividend,
combination, consolidation, recapitalization (including a recapitalization through a large nonrecurring cash dividend) or reclassification of the Shares, subdivision of the Shares, a rights offering, a reorganization, merger, spin-off, split-up, change in corporate structure or other similar occurrence. Any adjustment by the Administrator pursuant to this Section 13(a) shall be made in the
Administrator’s sole and absolute discretion and shall be final, binding and conclusive. Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of any
class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of Shares subject to an Award. If, by reason of a transaction described in this Section 13(a) or an adjustment pursuant to this
Section 13(a), a Participant’s Award agreement or agreement related to any Optioned Share covers additional or different shares of stock or securities, then such additional or different shares, and the Award agreement or agreement related
to the Optioned Share in respect thereof, shall be subject to all of the terms, conditions and restrictions which were applicable to the Award or Optioned Share prior to such adjustment. Notwithstanding the foregoing, the Administrator shall in any
event make such adjustments as may be required by Section 25102(o) of the California Corporations Code. 
 (b) Dissolution or
Liquidation. In the event of the dissolution or liquidation of the Company, each Award will terminate immediately prior to the consummation of such action, unless otherwise determined by the Administrator. 

(c) Corporate Transactions. In the event of a sale of all or substantially all of the Company’s assets, or a merger,
consolidation or other capital reorganization or business combination transaction of the Company with or into another corporation, entity or person (a “Corporate Transaction”), each outstanding Option shall either be
(i) assumed or an equivalent option or right shall be substituted by such successor corporation or a parent or subsidiary of such successor corporation (the “Successor Corporation”), or (ii) terminated in exchange for a
payment of cash, securities and/or other property equal to the excess of the Fair Market Value of the portion of the Optioned Share that is vested and exercisable immediately prior to the consummation of the Corporate Transaction over the per Share
exercise price thereof. Notwithstanding the foregoing, in the event such Successor Corporation does not agree to such assumption, substitution or exchange, each such Option shall terminate upon the consummation of the Corporate Transaction. 

 14. Time of Granting Options. The date of grant of an Award shall, for
all purposes, be the date on which the Administrator makes the determination granting such Award, or such other date as is determined by the Administrator, provided that in the case of any Incentive Stock Option, the grant date shall be the later of
the date on which the Administrator makes the determination granting such Incentive Stock Option or the date of commencement of the Optionee’s employment relationship with the Company. 

15. Amendment and Termination of the Plan. The Board may at any time amend or terminate the Plan, but no amendment or
termination (other than an adjustment pursuant to Section 13 above) shall be made that would materially and adversely affect the rights of any Participant under any outstanding Award, without his or her consent. In addition, to the extent
necessary and desirable to comply with the Applicable Laws, the Company shall obtain the approval of holders of capital stock with respect to any Plan amendment in such a manner and to such a degree as required. 

16. Conditions Upon Issuance of Shares. Notwithstanding any other provision of the Plan or any agreement entered into by
the Company pursuant to the Plan, the Company shall not be obligated, and shall have no liability for failure, to issue or deliver any Shares under the Plan unless such issuance or delivery would comply with the Applicable Laws, with such compliance
determined by the Company in consultation with its legal counsel. As a condition to the exercise of any Option, the Company may require the person exercising the Option to represent and warrant at the time of any such exercise or purchase 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 Applicable Laws. Shares issued upon exercise of
Options prior to the date, if ever, on which a share of Common Stock becomes a Listed Security shall be subject to a right of first refusal in favor of the Company pursuant to which the Participant will be required to offer Shares to the Company
before selling or transferring them to any third party on such terms and subject to such conditions as is reflected in the applicable Option Agreement. 

17. Beneficiaries. Unless stated otherwise in an Award agreement, a Participant may designate one or more beneficiaries
with respect to an Award by timely filing the prescribed form with the Company. A beneficiary designation may be changed by filing the prescribed form with the Company at any time before the Participant’s death. If no beneficiary was designated
or if no designated beneficiary survives the Participant, then after a Participant’s death any vested Award(s) shall be transferred or distributed to the Participant’s estate. 

18. Approval of Holders of Capital Stock. If required by the Applicable Laws, continuance of the Plan shall be subject to
approval by the holders of capital stock of the Company within twelve (12) months before or after the date the Plan is adopted or, to the extent required by Applicable Laws, any date the Plan is amended. Such approval shall be obtained in the
manner and to the degree required under the Applicable Laws. 

 19. Addenda. The Administrator may approve such addenda to the Plan as
it may consider necessary or appropriate for the purpose of granting Awards to Employees or Consultants, which Awards may contain such terms and conditions as the Administrator deems necessary or appropriate to accommodate differences in local law,
tax policy or custom, which, if so required under Applicable Laws, may deviate from the terms and conditions set forth in this Plan. The terms of any such addenda shall supersede the terms of the Plan to the extent necessary to accommodate such
differences but shall not otherwise affect the terms of the Plan as in effect for any other purpose. 
 20. Information to
Participants. Beginning on the earlier of (i) the date that the aggregate number of Participants under this Plan is five hundred (500) or more and the Company is relying on the exemption provided by Rule 12h-1(f)(1) under the Exchange Act, and (ii) the date that the Company is required to deliver information to Participants pursuant to Rule 701 under the Securities Act, and until such time as the Company
becomes subject to the reporting requirements of Section 13 or 15(d) of the Exchange Act, is no longer relying on the exemption provided by Rule 12h-1(f)(1) under the Exchange Act or is no longer required
to deliver information to Participants pursuant to Rule 701 under the Securities Act, the Company shall provide to each Participant the information described in paragraphs (e)(3), (4), and (5) of Rule 701 under the Securities Act not less
frequently than every six (6) months with the financial statements being not more than one hundred and eighty (180) days old and with such information provided either by physical or electronic delivery to the Participants or by written
notice to the Participants of the availability of the information on an Internet site that may be password-protected and of any password needed to access the information. The Company may request that Participants agree to keep the information to be
provided pursuant to this section confidential. If a Participant does not agree to keep the information to be provided pursuant to this section confidential, then the Company will not be required to provide the information unless otherwise required
pursuant to Rule 12h-1(f)(1) under the Exchange Act or Rule 701 of the Securities Act. 

 ADDENDUM A 

ATLASSIAN CORPORATION PTY LIMITED 2010 U.S. SHARE OPTION PLAN 

(California Participants) 
 Prior
to the date, if ever, on which a share of Common Stock becomes a Listed Security and/or the Company is subject to the reporting requirements of the Exchange Act, the terms set forth herein shall apply to Awards issued to California Participants. All
capitalized terms used herein but not otherwise defined shall have the respective meanings set forth in the Plan. 
 1. The following rules
shall apply to any Option in the event of termination of the Participant’s Continuous Service Status: 
 a. If such termination was for
reasons other than death, “disability” (as defined below), or Cause, the Participant shall have until the earlier of (i) the expiration of the Option term as set forth in the Option Agreement or (ii) at least thirty
(30) days after the date of such termination to exercise his or her Option to the extent the Participant is entitled to exercise on his or her termination date. 

b. If such termination was due to death or disability, the Participant shall have until the earlier of (i) the expiration of the Option
term as set forth in the Option Agreement or (ii) at least six (6) months after the date of such termination to exercise his or her Option to the extent the Participant is entitled to exercise on his or her termination date. 

“Disability” for purposes of this Addendum shall mean the inability of the Participant, in the opinion of a qualified physician acceptable to the
Company, to perform the major duties of the Participant’s position with the Company or any Parent or Subsidiary because of the sickness of injury of the Participant. 

2. Notwithstanding anything stated herein to the contrary, no Option shall be exercisable on or after the tenth anniversary of the date of
grant and any Award agreement shall terminate on or before the tenth anniversary of the date of grant. 
 3. The Company shall furnish
summary financial information (audited or unaudited) of the Company’s financial condition and results of operations, consistent with the requirements of Applicable Laws, at least annually to each California Participant during the period such
Participant has one or more Awards outstanding, and in the case of an individual who acquired Shares pursuant to the Plan, during the period such Participant owns such Shares. The Company shall not be required to provide such information if
(i) the issuance is limited to key employees whose duties in connection with the Company assure their access to equivalent information or (ii) the Plan or any agreement complies with all conditions of Rule 701 of the Securities Act;
provided that for purposes of determining such compliance, any registered domestic partner shall be considered a “family member” as that term is defined in Rule 701.EX-10.5

 Exhibit 10.5 

ATLASSIAN CORPORATION 

AMENDED AND RESTATED 2015 EMPLOYEE SHARE PURCHASE PLAN 

The Atlassian Corporation Amended and Restated 2015 Employee Share Purchase Plan, as may be further amended from time to time, (the
“Plan”) reflects an amendment and restatement of the Atlassian Corporation Plc 2015 Employee Share Purchase Plan (the “Plc Plan”), primarily to reflect the assumption of the Plc Plan by the Company in connection with the
redomicile of the parent holding company of the Atlassian company group from the United Kingdom to the United States, effective as of September 30, 2022 (the “Redomicile”), and shall be construed accordingly. 

The purpose of the Plan is to provide eligible employees of Atlassian Corporation, a Delaware corporation (the “Company”), and each
Designated Company (as defined in Section 11) with opportunities to purchase shares of the Company’s Class A common stock, par value $0.00001 per share (the “Shares”). 5,700,000 Shares in the aggregate have been approved and
reserved for issuance for this purpose, plus on July 1, 2016 and each July 1 thereafter, the number of Shares reserved and available for issuance under the Plan shall be cumulatively increased by the lesser of (i) 2,850,000 Shares,
(ii) one (1) percent of the number of shares issued and outstanding on the immediately preceding June 30 (on an as-converted basis) or (iii) such lesser number of Shares determined by the
Administrator. 
 The Plan includes two components: a Code Section 423 Component (the “423 Component”) and a non-Code Section 423 Component (the “Non-423 Component”). It is intended for the 423 Component to constitute an “employee stock purchase plan”
within the meaning of Section 423(b) of the U.S. Internal Revenue Code of 1986, as amended (the “Code”) and the 423 Component shall be interpreted in accordance with that intent (although the Company makes no undertaking or
representation to maintain such qualification). In addition, this Plan authorizes the grant of Options under the Non-423 Component that does not qualify as an “employee stock purchase plan” under
Section 423 of the Code. Except as otherwise provided herein, the Non-423 Component will operate and be administered in the same manner as the 423 Component. 

1. Administration. The Plan will be administered by the Company’s Board of Directors (the “Board”), the
compensation and leadership development committee of the Board and/or such person or persons appointed by the Board for such purpose (such administrator, the “Administrator”). The Administrator has authority at any time to:
(i) adopt, alter and repeal such rules, subplans, guidelines and practices for the administration and operation of the Plan and for its own acts and proceedings as it shall deem advisable, including to accommodate the specific requirements of
local laws, regulations and procedures for jurisdictions outside of the United States; (ii) interpret the terms and provisions of the Plan; (iii) make all determinations it deems advisable for the administration of the Plan;
(iv) decide all disputes arising in connection with the Plan; and (v) otherwise supervise the administration of the Plan. All interpretations and decisions of the Administrator shall be binding on all persons, including the Company
and the Participants. No member of the Board or individual exercising administrative authority with respect to the Plan shall be liable for any action or determination made in good faith with respect to the Plan or any Options granted
hereunder. 

 2. Offerings. The Company will make one or more offerings to eligible employees to
purchase Shares under the Plan (“Offerings”). Unless otherwise determined by the Administrator, an Offering will begin on the first business day occurring on or after each February 15 and August 15 and will end on the last
business day occurring on or before the following August 14 and February 14, respectively. The Administrator may, in its discretion, designate a different period for any Offering, provided that no Offering shall exceed 27 months in
duration. 
 3. Eligibility. All individuals classified as employees on the payroll records of the Company and each Designated
Company are eligible to participate in any one or more of the Offerings under the Plan, provided that as of the first day of the applicable Offering (the “Offering Date”) they are customarily employed by the Company or a Designated Company
for more than 20 hours a week, unless the exclusion of employees who do not meet this requirement is not permissible under Applicable Law. Notwithstanding any other provision herein, individuals who are not contemporaneously classified as employees
of the Company or a Designated Company for purposes of the Company’s or applicable Designated Company’s payroll system are not considered to be eligible employees of the Company or any Designated Company and shall not be eligible to
participate in the Plan. In the event any such individuals are reclassified as employees of the Company or a Designated Company for any purpose, including, without limitation, common law or statutory employees, by any action of any third party,
including, without limitation, any government agency, or as a result of any private lawsuit, action or administrative proceeding, such individuals shall, notwithstanding such reclassification, remain ineligible for participation. Notwithstanding the
foregoing, the exclusive means for individuals who are not contemporaneously classified as employees of the Company or a Designated Company on the Company’s or Designated Company’s payroll system to become eligible to participate in a plan
which is equivalent to this Plan is through the adoption of a sub-plan, which specifically renders such individuals eligible to participate therein. 

4. Participation. 
 (a)
General. An eligible employee who is not a Participant on any Offering Date may participate in such Offering by submitting an enrollment form to the Company or any third party designated by the Company (either in electronic or written
form, according to procedures established by the Company) at least 15 business days before the Offering Date (or by such other deadline as shall be established by the Administrator for the Offering). 

(b) Enrollment. The enrollment form will (i) state a whole percentage to be contributed from an eligible employee’s
Compensation (as defined in Section 11) per pay period, (ii) authorize the purchase of Shares in each Offering in accordance with the terms of the Plan and (iii) specify the exact name or names in which Shares purchased for such
individual are to be issued or transferred pursuant to Section 10. An employee who does not enroll in accordance with these procedures will be deemed to have waived the right to participate. Unless a Participant submits a new
enrollment form or withdraws from the Plan, such Participant’s contributions and purchases will continue at the same percentage of Compensation for future Offerings, provided he or she remains eligible. 

(c) Notwithstanding the foregoing, participation in the Plan will neither be permitted nor be denied contrary to the requirements of the Code
and any Applicable Law. 

 5. Employee Contributions. Each eligible employee may authorize payroll deductions at
a minimum of one (1) percent up to a maximum of 10 percent of such employee’s Compensation for each pay period; provided, however, that if payroll deductions are not permitted or problematic under Applicable Law or for administrative
reasons, the Company, in its discretion, may allow eligible employees to contribute to the Plan by other means. The Company will maintain book accounts showing the amount of payroll deductions or other contributions made by each Participant for
each Offering. No interest will accrue or be paid on payroll deductions or other contributions, unless required under Applicable Law. 

6. Contribution Changes. Except as may be determined by the Administrator in advance of an Offering, a Participant may not
(a) increase or (b) decrease more than once his or her contributions during any Offering, but may (i) increase or (ii) decrease his or her contributions with respect to the next Offering (subject to the limitations of
Section 5) by submitting a new enrollment form at least 15 business days before the next Offering Date (or by such other deadline as shall be established by the Administrator for the Offering). The Administrator may, in advance of any
Offering, establish rules permitting a Participant to increase, decrease or terminate his or her contributions during an Offering. 

7. Withdrawal. A Participant may withdraw from participation in the Plan by submitting a notice of withdrawal to the Company or
any third party designated by the Company (either in electronic or written form, according to procedures established by the Company). For the avoidance of doubt, contributions of zero (0) percent of a Participant’s Compensation shall
not constitute a withdrawal from the Plan unless a notice of withdrawal has been submitted to the Company or any third party designated by the Company (either in electronic or written form, according to procedures established by the
Company). The Participant’s withdrawal will be effective as soon as reasonably practicable. Following a Participant’s withdrawal, the Company will promptly refund such individual’s entire account balance under the Plan, if
any, to him or her (after payment for any Shares purchased before the effective date of withdrawal). Partial withdrawals are not permitted. Such an employee may not begin participation again during the remainder of the Offering, but may
enroll in a subsequent Offering in accordance with Section 4. 
 8. Grant of Options. On each Offering Date, the Company
will grant to each eligible employee who is then a Participant in the Plan an option (“Option”) to purchase on the last day of such Offering (the “Exercise Date”), at the Option Price hereinafter provided for, the lowest of
(a) a number of Shares determined by dividing such Participant’s accumulated contributions on such Exercise Date by the lower of (i) 85 percent of the Fair Market Value of the Shares on the Offering Date, or
(ii) 85 percent of the Fair Market Value of the Shares on the Exercise Date; (b) 2,500 Shares; or (c) such other lesser maximum number of Shares as shall have been established by the Administrator in advance of the Offering;
provided, however, that such Option shall be subject to the limitations set forth below. Each Participant’s Option shall be exercisable only to the extent of such Participant’s accumulated payroll deductions and/or other contributions
on the Exercise Date. The purchase price for each Share purchased under each Option (the “Option Price”) will be 85 percent of the Fair Market Value of the Shares on the Offering Date or the Exercise Date, whichever is less. 

 Notwithstanding the foregoing, no Participant may be granted an Option hereunder if such
Participant, immediately after the Option was granted, would be treated as owning shares possessing five (5) percent or more of the total combined voting power or value of all classes of shares of the Company or any Parent or Subsidiary (as
defined in Section 11). For purposes of the preceding sentence, the attribution rules of Section 424(d) of the Code shall apply in determining the share ownership of a Participant, and all shares which the Participant has a
contractual right to purchase shall be treated as shares owned by the Participant. In addition, no Participant may be granted an Option which permits his or her rights to purchase Shares under the Plan, and any other employee stock purchase
plan of the Company and its Parents and Subsidiaries, to accrue at a rate which exceeds $25,000 of the fair market value of such Share (determined on the Option grant date or dates) for each calendar year in which the Option is outstanding at any
time. The purpose of the limitation in the preceding sentence is to comply with Section 423(b)(8) of the Code and shall be applied taking Options into account in the order in which they were granted. 

9. Exercise of Option and Purchase of Shares. Each employee who continues to be a Participant in the Plan on the Exercise Date
shall be deemed to have exercised his or her Option on such date and shall acquire from the Company such number of whole Shares reserved for the purpose of the Plan as his or her accumulated contributions on such date will purchase at the Option
Price, subject to any other limitations contained in the Plan. Any amount remaining in a Participant’s account at the end of an Offering solely by reason of the inability to purchase a fractional Share will be carried forward to the next
Offering; any other balance remaining in a Participant’s account at the end of an Offering will be refunded to the Participant promptly. 

If a Participant has more than one Option outstanding under the Plan, unless he or she otherwise indicates in agreements or notices delivered
hereunder: (i) each agreement or notice delivered by that Participant shall be deemed to apply to all of his or her Options under the Plan, and (ii) an Option with a lower Option Price (or an earlier granted Option, if different Options
have identical Option Prices) shall be exercised to the fullest possible extent before an Option with a higher Option Price (or a later granted Option if different Options have identical Option Prices) shall be exercised. 

10. Issuance of Certificates. Certificates, or book entries for uncertificated Shares, representing Shares purchased under the
Plan may be issued only in the name of the employee or, if permitted by the Administrator, in the name of the employee and another person of legal age as joint tenants with rights of survivorship, or in the name of a broker authorized by the
employee to be his, her or their nominee for such purpose. 
 11. Definitions. 

The term “Affiliate” means any entity that is directly or indirectly controlled by the Company which does not meet the
definition of a Subsidiary below, as determined by the Administrator, whether new or hereafter existing. 
 The term “Applicable
Law” means any applicable law, including, without limitation, (i) provisions of the Code, the Securities Act, the Exchange Act and any rules or regulations thereunder; (ii) corporate, securities, tax, or other laws, statutes,
rules, requirements or regulations, whether U.S. or non-U.S., federal, state or local; and (iii) rules of any securities exchange or automated quotation system on which the Shares are listed, quoted or
traded. 

 The term “Compensation” means base pay, prior to reduction pursuant to
Sections 125, 132(f) or 401(k) of the Code or comparable reductions under laws outside the United States, but excluding overtime, incentive or bonus awards, commissions, allowances and reimbursements for expenses such as relocation
allowances or travel expenses, income or gains on the exercise of Company share options or other equity incentive awards and similar items. The Administrator shall have the discretion to determine the application of this definition to
Participants outside of the United States. 
 The term “Designated Company” means any present or future Affiliate or
Subsidiary (as defined below) that has been designated by the Administrator to participate in the Plan. The Administrator may so designate any Affiliate or Subsidiary, or revoke any such designation, at any time and from time to time, either
before or after the Plan is approved by the stockholders and may further designate such companies as participating in the 423 Component or the Non-423 Component. For purposes of the 423 Component, only
Subsidiaries may be Designated Companies. The current list of Designated Companies is attached hereto as Appendix A. 
 The term
“Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder. 
 The
term “Fair Market Value of the Shares” on any given date means the fair market value of the Shares determined in good faith by the Administrator; provided, however, that if the Shares are admitted to quotation on the National
Association of Securities Dealers Automated Quotation System, Nasdaq Global Market or another national securities exchange, the determination shall be made by reference to the closing price on such date. If there are no market quotations for
such date, the determination shall be made by reference to the last date preceding such date for which there are market quotations. 
 The
term “Plan” means this Amended and Restated 2015 Employee Share Purchase Plan, as may be further amended from time to time. Unless otherwise clearly required by the context, references to the “Plan” herein shall include
the Plc Plan. 
 The term “Parent” means a “parent corporation” with respect to the Company, as defined in
Section 424(e) of the Code. 
 The term “Participant” means an individual who is eligible as determined in
Section 3 and who has complied with the provisions of Section 4. 
 The term “Securities Act” means the U.S.
Securities Act of 1933, as amended, and the rules and regulations thereunder. 
 The term “Subsidiary” means a
“subsidiary corporation” with respect to the Company, as defined in Section 424(f) of the Code. 
 The term “Tax
Liability” means any amount of U.S. or non-U.S. federal, state or local income tax, social security (or similar) contributions, payroll tax, fringe benefits tax, payment on account and/or other tax-related items related to the participation in the Plan and legally applicable to the Participant, which the Company and/or an Affiliate or Subsidiary may become liable to pay on the Participant’s behalf to
the relevant authorities in any jurisdiction. 

 12. Rights on Termination of Employment. Unless otherwise required by Applicable
Law, if a Participant’s employment terminates for any reason before the Exercise Date for any Offering, no contributions will be taken from any pay due and owing to the Participant and the balance in the Participant’s account will be paid
to such Participant or, in the case of such Participant’s death, if permitted by the Administrator, to his or her designated beneficiary as if such Participant had withdrawn from the Plan under Section 7. An employee will be deemed to
have terminated employment, for this purpose, if the entity that employs him or her, having been a Designated Company, ceases to be an Affiliate or Subsidiary, as applicable, or if the employee is transferred to any entity other than the Company or
a Designated Company. An employee will not be deemed to have terminated employment for this purpose, if the employee is on an approved leave of absence for military service or sickness or for any other purpose approved by the Company, if the
employee’s right to reemployment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Administrator otherwise provides in writing. 

13. Special Rules. Notwithstanding anything herein to the contrary, the Administrator may adopt special rules applicable to
the employees of a particular Designated Company, whenever the Administrator determines that such rules are necessary or appropriate for the implementation of the Plan in a jurisdiction where such Designated Company has employees; provided
that, if such rules are inconsistent with the requirements of Section 423(b) of the Code, these employees will participate in the Non-423 Component. Any special rules established
pursuant to this Section 13 shall, to the extent possible, result in the employees subject to such rules having substantially the same rights as other Participants in the Plan. 

14. Participants Not Stockholders. Neither the granting of an Option to a Participant nor the deductions from his or her
Compensation or other contributions shall deem such Participant to be a holder of the Shares covered by an Option under the Plan until such Shares have been purchased by and issued or transferred to him or her. 

15. Rights Not Transferable. Options under the Plan are not transferable by a Participant other than by will or the laws of
descent and distribution, and are exercisable during the Participant’s lifetime only by the Participant. 
 16. Application of
Funds. All funds received or held by the Company under the Plan may be combined with other corporate funds and may be used for any corporate purpose, unless otherwise required under Applicable Law. 

17. Adjustment in Case of Changes Affecting Shares. In the event of a subdivision of outstanding Shares, the payment of a dividend
in Shares or any other change affecting the Shares, the number of Shares approved for the Plan and the Share limitation set forth in Section 8 shall be equitably or proportionately adjusted to give proper effect to such event. 

18. Amendment of the Plan. The Board may at any time and from time to time amend the Plan in any respect, except that without the
approval within 12 months of such Board action by the stockholders, no amendment shall be made increasing the number of Shares approved for the Plan or making any other change that would require stockholder approval in order for the 423 Component of
the Plan, as amended, to qualify as an “employee stock purchase plan” under Section 423(b) of the Code or that would otherwise require stockholder approval with respect to the Non-423
Component. 

 19. Insufficient Shares. If the total number of Shares that would otherwise be
purchased on any Exercise Date plus the number of Shares purchased under previous Offerings under the Plan exceeds the maximum number of Shares issuable under the Plan, the Shares then available shall be apportioned among Participants in proportion
to the amount of contributions accumulated on behalf of each Participant that would otherwise be used to purchase Shares on such Exercise Date. 

20. Termination of the Plan. The Plan may be terminated at any time by the Board. Upon termination of the Plan, all amounts in the
accounts of Participants shall be promptly refunded. The Plan shall automatically terminate on the ten year anniversary of the date of the Company’s initial public offering of its Shares which occurred on December 10, 2015. 

21. Compliance with Law. The Company’s obligation to sell and deliver Shares under the Plan is subject to completion of any
registration or qualification of the Shares under any U.S. or non-U.S. local, state or federal securities or exchange control law or under rulings or regulations of the U.S. Securities and Exchange
Commission (“SEC”) or of any other governmental regulatory body, and to obtaining any approval or other clearance from any U.S. and non-U.S. local, state or federal governmental agency, which
registration, qualification or approval the Company shall, in its absolute discretion, deem necessary or advisable. The Company is under no obligation to register or qualify the Shares with the SEC or any other U.S. or non-U.S. securities commission or to seek approval or clearance from any governmental authority for the issuance or sale of the Shares.

22. Governing Law. This Plan and all Options and actions taken thereunder shall be governed by, and construed in accordance with,
the laws of the State of California, applied without regard to conflict of law principles. 
 23. Issuance or Transfer of
Shares. Shares may be issued upon exercise of an Option from authorized but unissued Shares or, in the alternative, the Company may arrange for the transfer of Shares (including from Shares held in the treasury of the Company, or from any
other proper source). 
 24. Tax Withholding. Each Participant agrees, by participating in the Plan, that the Company, and its
Affiliates and Subsidiaries shall have the right to deduct any Tax Liability from any payment of any kind otherwise due to the Participant, including Shares issuable under the Plan. Where a Tax Liability arises in connection with the Plan, the
Company and/or a Designated Company may require that, as a condition of exercise of an Option and purchase of Shares, a Participant must either: 

(a) make a payment to the Company, or otherwise as the Company directs, of an amount equal to the Company’s estimate of the amount of the
Tax Liability; or 
 (b) enter into arrangements acceptable to the Company to secure that such payment is made (whether by surrender of
Shares, net share issuance, the sale of Shares or otherwise). 

 25. Notification Upon Sale of Shares. Each Participant who is subject to tax in
the United States with respect to his or her participation in the Plan agrees, by entering the Plan, to give the Company prompt notice of any disposition of Shares purchased under the Plan where such disposition occurs within two years after the
date of grant of the Option pursuant to which such Shares were purchased. 
 26. Effective Date. The Plan, as amended and
restated, shall take effect on September 30, 2022, the effective date of the Redomicile.

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