Document:

EX-4.1

	
	 Exhibit 4.1
  

  
 DELAWARE SEAL JUNE 2010 CORPORATE DATADOG, INC. AUTHORIZED OFFICER TRANSFER AGENT AND REGISTRAR (BROOKLYN, NY) AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC BY: COUNTERSIGNED AND
REGISTERED: CHIEF FINANCIAL OFFICER CHIEF EXECUTIVE OFFICER transferable on the books of the corporation in person or by duly authorized attorney, upon surrender of this Certificate properly endorsed. This Certificate is not valid until
countersigned by the Transfer Agent and registered by the Registrar. WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers. Dated: DATADOG, INC. FULLY PAID AND
NON-ASSESSABLE SHARES OF CLASS A COMMON STOCK $0.00001 PAR VALUE PER SHARE OF is the record holder of This certifies that SEE REVERSE FOR CERTAIN DEFINITIONS INCORPORATED UNDER THE LAWS CUSIP 23804L 10 3 OF
THE STATE OF DELAWARE DD 

 

 
  
 THE
SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15. Signature(s) Guaranteed: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF NOTICE: THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY
CHANGE WHATEVER. KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN OR DESTROYED THE CORPORATION WILL REQUIRE A BOND INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE. Dated the premises. to transfer the said stock on
the books of the within-named Corporation, with full power of substitution in Attorney of the capital stock represented by the within Certificate, and do hereby irrevocably constitute and appoint Shares (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS,
INCLUDING ZIP CODE, OF ASSIGNEE) PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE FOR VALUE RECEIVED, hereby sell, assign and transfer unto Additional abbreviations may also be used though not in the above list. UNIF GIFT MIN
ACT –– Custodian (Cust) (Minor) (State) under Uniform Gifts to Minors Act TEN COM — as tenants in common TEN ENT — as tenants by the entireties JT TEN — as joint tenants with right of survivorship and not as tenants in
commom The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations: THE CORPORATION SHALL FURNISH WITHOUT CHARGE TO
EACH STOCKHOLDER WHO SO REQUESTS A STATEMENT OF THE POWERS, DESIGNATIONS, PREFERENCES AND RELATIVE, PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OF THE CORPORATION OR SERIES THEREOF AND THE QUALIFICATIONS, LIMITATIONS OR
RESTRICTIONS OF SUCH PREFERENCES AND/OR RIGHTS. SUCH REQUESTS SHALL BE MADE TO THE CORPORATION’S SECRETARY AT THE PRINCIPAL OFFICE OF THE CORPORATION.EX-10.3

 Exhibit 10.3 

DATADOG, INC. 

2019 EQUITY INCENTIVE PLAN 

ADOPTED BY THE BOARD OF DIRECTORS:
SEPTEMBER 6, 2019 
 APPROVED BY THE STOCKHOLDERS:
SEPTEMBER 6, 2019 
 1. GENERAL. 

(a) Successor to and Continuation of Prior Plan. The Plan is the successor to and continuation of the Prior Plan. As of the
Effective Date, (i) no additional awards may be granted under the Prior Plan; (ii) the Prior Plan’s Available Reserve (plus any Returning Shares) will become available for issuance pursuant to Awards granted under this Plan (provided,
however, that any such shares that are shares of Class B Common Stock shall instead be added to the Share Reserve as shares of Class A Common Stock as described in Section 2(a)); and (iii) all outstanding awards granted under the
Prior Plan will remain subject to the terms of the Prior Plan (except to the extent such outstanding awards result in Returning Shares that become available for issuance pursuant to Awards granted under this Plan). All Awards granted under this Plan
will be subject to the terms of this Plan. 
 (b) Plan Purpose. The Company, by means of the Plan, seeks to secure and retain
the services of Employees, Directors and Consultants, to provide incentives for such persons to exert maximum efforts for the success of the Company and any Affiliate and to provide a means by which such persons may be given an opportunity to
benefit from increases in value of the Class A Common Stock through the granting of Awards. 
 (c) Available Awards. The
Plan provides for the grant of the following Awards: (i) Incentive Stock Options; (ii) Nonstatutory Stock Options; (iii) SARs; (iv) Restricted Stock Awards; (v) RSU Awards; (vi) Performance Awards; and (vii) Other
Awards. 
 (d) Adoption Date; Effective Date. The Plan will come into existence on the Adoption Date, but no Award may be granted
prior to the Effective Date. 
 2. SHARES SUBJECT TO THE PLAN. 

(a) Share Reserve. Subject to adjustment in accordance with Section 2(c) and any adjustments as necessary to implement any
Capitalization Adjustments, the aggregate number of shares of Class A Common Stock that may be issued pursuant to Awards will not exceed 70,296,733 shares, which number is the sum of: (i) 30,250,000 new shares, plus (ii) a number of shares
of Class A Common Stock equal to the Prior Plan’s Available Reserve, plus (iii) a number of shares of Class A Common Stock equal to the number of Returning Shares, if any, as such shares become available from time to time. In
addition, subject to any adjustments as necessary to implement any Capitalization Adjustments, such aggregate number of shares of Class A Common Stock will automatically increase on January 1 of each year for a period of ten years
commencing on January 1, 2020 and ending on (and including) January 1, 2029, in an amount equal to 5%) of the total number of shares of Capital Stock outstanding on December 31 of the preceding year; provided, however, that the Board
may act prior to January 1st of a given year to provide that the increase for such year will be a lesser number of shares of Class A Common Stock. 

(b) Aggregate Incentive Stock Option Limit. Notwithstanding anything to the contrary in Section 2(a) and subject to any adjustments
as necessary to implement any Capitalization Adjustments, the aggregate maximum number of shares of Class A Common Stock that may be issued pursuant to the exercise of Incentive Stock Options is 210,890,199 shares. 

 

 (c) Share Reserve Operation. 

(i) Limit Applies to Class A Common Stock Issued Pursuant to Awards. For clarity, the Share Reserve is a limit on the
number of shares of Class A Common Stock that may be issued pursuant to Awards and does not limit the granting of Awards, except that the Company will keep available at all times the number of shares of Class A Common Stock reasonably
required to satisfy its obligations to issue shares pursuant to such Awards. Shares may be issued in connection with a merger or acquisition as permitted by, as applicable, Nasdaq Listing Rule 5635(c), NYSE Listed Company Manual
Section 303A.08, NYSE American Company Guide Section 711 or other applicable rule, and such issuance will not reduce the number of shares available for issuance under the Plan. 

(ii) Actions that Do Not Constitute Issuance of Class A Common Stock and Do Not Reduce Share Reserve. The following
actions do not result in an issuance of shares under the Plan and accordingly do not reduce the number of shares subject to the Share Reserve and available for issuance under the Plan: (1) the expiration or termination of any portion of an
Award without the shares covered by such portion of the Award having been issued, (2) the settlement of any portion of an Award in cash (i.e., the Participant receives cash rather than Class A Common Stock), (3) the withholding of shares
that would otherwise be issued by the Company to satisfy the exercise, strike or purchase price of an Award; or (4) the withholding of shares that would otherwise be issued by the Company to satisfy a tax withholding obligation in connection
with an Award. 
 (iii) Reversion of Previously Issued Shares of Class A Common Stock to Share Reserve. The
following shares of Class A Common Stock previously issued pursuant to an Award and accordingly initially deducted from the Share Reserve will be added back to the Share Reserve and again become available for issuance under the Plan:
(1) any shares that are forfeited back to or repurchased by the Company because of a failure to meet a contingency or condition required for the vesting of such shares; (2) any shares that are reacquired by the Company to satisfy the
exercise, strike or purchase price of an Award; and (3) any shares that are reacquired by the Company to satisfy a tax withholding obligation in connection with an Award. 

3. ELIGIBILITY AND LIMITATIONS. 

(a) Eligible Award Recipients. Subject to the terms of the Plan, Employees, Directors and Consultants are eligible to receive Awards.

 (b) Specific Award Limitations. 

(i) Limitations on Incentive Stock Option Recipients. Incentive Stock Options may be granted only to Employees of the Company or a
“parent corporation” or “subsidiary corporation” thereof (as such terms are defined in Sections 424(e) and (f) of the Code). 

(ii) Incentive Stock Option $100,000 Limitation. To the extent that the aggregate Fair Market Value (determined at the time of grant) of
Class A Common Stock with respect to which Incentive Stock Options are exercisable for the first time by any Optionholder during any calendar year (under all plans of the Company and any Affiliates) exceeds $100,000 (or such other limit
established in the Code) or otherwise does not comply with the rules governing Incentive Stock Options, the Options or portions thereof that exceed such limit (according to the order in which they were granted) or otherwise do not comply with such
rules will be treated as Nonstatutory Stock Options, notwithstanding any contrary provision of the applicable Option Agreement(s). 

  
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 (iii) Limitations on Incentive Stock Options Granted to Ten Percent Stockholders. A
Ten Percent Stockholder may not be granted an Incentive Stock Option unless (i) the exercise price of such Option is at least 110% of the Fair Market Value on the date of grant of such Option and (ii) the Option is not exercisable after
the expiration of five years from the date of grant of such Option. 
 (iv) Limitations on Nonstatutory Stock Options and SARs.
Nonstatutory Stock Options and SARs may not be granted to Employees, Directors and Consultants who are providing Continuous Service only to any “parent” of the Company (as such term is defined in Rule 405) unless the stock underlying
such Awards is treated as “service recipient stock” under Section 409A because the Awards are granted pursuant to a corporate transaction (such as a spin off transaction) or unless such Awards otherwise comply with the distribution
requirements of Section 409A. 
 (c) Aggregate Incentive Stock Option Limit. The aggregate maximum number of shares of
Class A Common Stock that may be issued pursuant to the exercise of Incentive Stock Options is the number of shares specified in Section 2(b). 

(d) Non-Employee Director Compensation Limit. The aggregate value of all compensation granted or
paid, as applicable, to any individual for service as a Non-Employee Director with respect to any calendar year, including Awards granted and cash fees paid by the Company to such Non-Employee Director, will not exceed (i) $750,000 in total value or (ii) in the event such Non-Employee Director is first appointed or elected to the Board during such
calendar year, $1,000,000 in total value, in each case calculating the value of any equity awards based on the grant date fair value of such equity awards for financial reporting purposes.

4. OPTIONS AND STOCK APPRECIATION RIGHTS. 

Each Option and SAR will have such terms and conditions as determined by the Board. Each Option will be designated in writing as an Incentive
Stock Option or Nonstatutory Stock Option at the time of grant; provided, however, that if an Option is not so designated, then such Option will be a Nonstatutory Stock Option, and the shares purchased upon exercise of each type of Option will be
separately accounted for. Each SAR will be denominated in shares of Class A Common Stock equivalents. The terms and conditions of separate Options and SARs need not be identical; provided, however, that each Option Agreement and SAR Agreement
will conform (through incorporation of provisions hereof by reference in the Award Agreement or otherwise) to the substance of each of the following provisions: 

(a) Term. Subject to Section 3(b) regarding Ten Percent Stockholders, no Option or SAR will be exercisable after the expiration of
ten years from the date of grant of such Award or such shorter period specified in the Award Agreement. 
 (b) Exercise or Strike
Price. Subject to Section 3(b) regarding Ten Percent Stockholders, the exercise or strike price of each Option or SAR will not be less than 100% of the Fair Market Value on the date of grant of such Award. Notwithstanding the foregoing, an
Option or SAR may be granted with an exercise or strike price lower than 100% of the Fair Market Value on the date of grant of such Award if such Award is granted pursuant to an assumption of or substitution for another option or stock appreciation
right pursuant to a Corporate Transaction and in a manner consistent with the provisions of Sections 409A and, if applicable, 424(a) of the Code. 

  
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 (c) Exercise Procedure and Payment of Exercise Price for Options. In order to
exercise an Option, the Participant must provide notice of exercise to the Plan Administrator in accordance with the procedures specified in the Option Agreement or otherwise provided by the Company. The Board has the authority to grant Options that
do not permit all of the following methods of payment (or otherwise restrict the ability to use certain methods) and to grant Options that require the consent of the Company to utilize a particular method of payment. The exercise price of an Option
may be paid, to the extent permitted by Applicable Law and as determined by the Board, by one or more of the following methods of payment to the extent set forth in the Option Agreement: 

(i) by cash or check, bank draft or money order payable to the Company; 

(ii) pursuant to a “cashless exercise” program developed under Regulation T as promulgated by the Federal Reserve Board that,
prior to the issuance of the Class A Common Stock subject to the Option, results in either the receipt of cash (or check) by the Company or the receipt of irrevocable instructions to pay the exercise price to the Company from the sales
proceeds; 
 (iii) by delivery to the Company (either by actual delivery or attestation) of shares of Class A Common Stock that
are already owned by the Participant free and clear of any liens, claims, encumbrances or security interests, with a Fair Market Value on the date of exercise that does not exceed the exercise price, provided that (1) at the time of exercise
the Class A Common Stock is publicly traded, (2) any remaining balance of the exercise price not satisfied by such delivery is paid by the Participant in cash or other permitted form of payment, (3) such delivery would not violate any
Applicable Law or agreement restricting the redemption of the Class A Common Stock, (4) any certificated shares are endorsed or accompanied by an executed assignment separate from certificate, and (5) such shares have been held by the
Participant for any minimum period necessary to avoid adverse accounting treatment as a result of such delivery; 
 (iv) if the Option
is a Nonstatutory Stock Option, by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Class A Common Stock issuable upon exercise by the largest whole number of shares with a Fair Market
Value on the date of exercise that does not exceed the exercise price, provided that (1) such shares used to pay the exercise price will not be exercisable thereafter and (2) any remaining balance of the exercise price not satisfied by
such net exercise is paid by the Participant in cash or other permitted form of payment; or 
 (v) in any other form of consideration
that may be acceptable to the Board and permissible under Applicable Law. 
 (d) Exercise Procedure and Payment of Appreciation
Distribution for SARs. In order to exercise any SAR, the Participant must provide notice of exercise to the Plan Administrator in accordance with the SAR Agreement. The appreciation distribution payable to a Participant upon the exercise
of a SAR will not be greater than an amount equal to the excess of (i) the aggregate Fair Market Value on the date of exercise of a number of shares of Class A Common Stock equal to the number of Class A Common Stock equivalents that
are vested and being exercised under such SAR, over (ii) the strike price of such SAR. Such appreciation distribution may be paid to the Participant in the form of Class A Common Stock or cash (or any combination of Class A Common
Stock and cash) or in any other form of payment, as determined by the Board and specified in the SAR Agreement. 

  
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 (e) Transferability. Options and SARs may not be transferred to third party financial
institutions for value. The Board may impose such additional limitations on the transferability of an Option or SAR as it determines. In the absence of any such determination by the Board, the following restrictions on the transferability of Options
and SARs will apply, provided that except as explicitly provided herein, neither an Option nor a SAR may be transferred for consideration and provided, further, that if an Option is an Incentive Stock Option, such Option may be deemed to be a
Nonstatutory Stock Option as a result of such transfer: 
 (i) Restrictions on Transfer. An Option or SAR will not be transferable,
except by will or by the laws of descent and distribution, and will be exercisable during the lifetime of the Participant only by the Participant; provided, however, that the Board may permit transfer of an Option or SAR in a manner that is not
prohibited by applicable tax and securities laws upon the Participant’s request, including to a trust if the Participant is considered to be the sole beneficial owner of such trust (as determined under Section 671 of the Code and
applicable state law) while such Option or SAR is held in such trust, provided that the Participant and the trustee enter into a transfer and other agreements required by the Company. 

(ii) Domestic Relations Orders. Notwithstanding the foregoing, subject to the execution of transfer documentation in a format acceptable
to the Company and subject to the approval of the Board or a duly authorized Officer, an Option or SAR may be transferred pursuant to a domestic relations order. 

(f) Vesting. The Board may impose such restrictions on or conditions to the vesting and/or exercisability of an Option or SAR as
determined by the Board. Except as otherwise provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate, vesting of Options and SARs will cease upon termination of the Participant’s
Continuous Service. 
 (g) Termination of Continuous Service for Cause. Except as explicitly otherwise provided in the Award Agreement
or other written agreement between a Participant and the Company or an Affiliate, if a Participant’s Continuous Service is terminated for Cause, the Participant’s Options and SARs will terminate and be forfeited immediately upon such
termination of Continuous Service, and the Participant will be prohibited from exercising any portion (including any vested portion) of such Awards on and after the date of such termination of Continuous Service and the Participant will have no
further right, title or interest in such forfeited Award, the shares of Class A Common Stock subject to the forfeited Award, or any consideration in respect of the forfeited Award. 

(h) Post-Termination Exercise Period Following Termination of Continuous Service for Reasons Other than Cause. Subject to
Section 4(i), if a Participant’s Continuous Service terminates for any reason other than for Cause, the Participant may exercise his or her Option or SAR to the extent vested, but only within the following period of time or, if applicable,
such other period of time provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate; provided, however, that in no event may such Award be exercised after the expiration of its maximum term (as
set forth in Section 4(a)): 
 (i) three months following the date of such termination if such termination is a termination
without Cause (other than any termination due to the Participant’s Disability or death); 
 (ii) 12 months following the date of
such termination if such termination is due to the Participant’s Disability; 
 (iii) 18 months following the date of such
termination if such termination is due to the Participant’s death; or 
 (iv) 18 months following the date of the
Participant’s death if such death occurs following the date of such termination but during the period such Award is otherwise exercisable (as provided in (i) or (ii) above). 

  
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 Following the date of such termination, to the extent the Participant does not exercise such Award within
the applicable Post-Termination Exercise Period (or, if earlier, prior to the expiration of the maximum term of such Award), such unexercised portion of the Award will terminate, and the Participant will have no further right, title or interest in
terminated Award, the shares of Class A Common Stock subject to the terminated Award, or any consideration in respect of the terminated Award. 

(i) Restrictions on Exercise; Extension of Exercisability. A Participant may not exercise an Option or SAR at any time that the
issuance of shares of Class A Common Stock upon such exercise would violate Applicable Law. Except as otherwise provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate, if a
Participant’s Continuous Service terminates for any reason other than for Cause and, at any time during the last thirty days of the applicable Post-Termination Exercise Period: (i) the exercise of the Participant’s Option or SAR would
be prohibited solely because the issuance of shares of Class A Common Stock upon such exercise would violate Applicable Law, or (ii) the immediate sale of any shares of Class A Common Stock issued upon such exercise would violate the
Company’s Trading Policy, then the applicable Post-Termination Exercise Period will be extended to the last day of the calendar month that commences following the date the Award would otherwise expire, with an additional extension of the
exercise period to the last day of the next calendar month to apply if any of the foregoing restrictions apply at any time during such extended exercise period, generally without limitation as to the maximum permitted number of extensions);
provided, however, that in no event may such Award be exercised after the expiration of its maximum term (as set forth in Section 4(a)). 

(j) Non-Exempt Employees. No Option or SAR, whether or not vested, granted to an Employee
who is a non-exempt employee for purposes of the Fair Labor Standards Act of 1938, as amended, will be first exercisable for any shares of Class A Common Stock until at least six months following the date
of grant of such Award. Notwithstanding the foregoing, in accordance with the provisions of the Worker Economic Opportunity Act, any vested portion of such Award may be exercised earlier than six months following the date of grant of such Award in
the event of (i) such Participant’s death or Disability, (ii) a Corporate Transaction in which such Award is not assumed, continued or substituted, (iii) a Change in Control, or (iv) such Participant’s retirement (as
such term may be defined in the Award Agreement or another applicable agreement or, in the absence of any such definition, in accordance with the Company’s then current employment policies and guidelines). This Section 4(j) is intended to
operate so that any income derived by a non-exempt employee in connection with the exercise or vesting of an Option or SAR will be exempt from his or her regular rate of pay. 

(k) Whole Shares. Options and SARs may be exercised only with respect to whole shares of Class A Common Stock or their equivalents.

 5. AWARDS OTHER THAN OPTIONS AND STOCK
APPRECIATION RIGHTS. 
 (a) Restricted Stock Awards and RSU Awards. Each Restricted Stock
Award and RSU Award will have such terms and conditions as determined by the Board; provided, however, that each Restricted Stock Award Agreement and RSU Award Agreement will conform (through incorporation of the provisions hereof by reference in
the Award Agreement or otherwise) to the substance of each of the following provisions: 
 (i) Form of Award. 

(1) RSAs: To the extent consistent with the Company’s Bylaws, at the Board’s election, shares of Class A Common Stock
subject to a Restricted Stock Award may be (i) held in book entry form subject to the Company’s instructions until such shares become vested or any other restrictions lapse, or (ii) evidenced by a certificate, which certificate will
be held in such form and manner as determined by the Board. Unless otherwise determined by the Board, a Participant will have voting and other rights as a stockholder of the Company with respect to any shares subject to a Restricted Stock Award.

  
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 (2) RSUs: A RSU Award represents a Participant’s right to be issued on a future
date the number of shares of Class A Common Stock that is equal to the number of restricted stock units subject to the RSU Award. As a holder of a RSU Award, a Participant is an unsecured creditor of the Company with respect to the
Company’s unfunded obligation, if any, to issue shares of Class A Common Stock in settlement of such Award and nothing contained in the Plan or any RSU Agreement, and no action taken pursuant to its provisions, will create or be construed
to create a trust of any kind or a fiduciary relationship between a Participant and the Company or an Affiliate or any other person. A Participant will not have voting or any other rights as a stockholder of the Company with respect to any RSU Award
(unless and until shares are actually issued in settlement of a vested RSU Award). 
 (ii) Consideration. 

(1) RSA: A Restricted Stock Award may be granted in consideration for (A) cash or check, bank draft or money order payable to the
Company, (B) past services to the Company or an Affiliate, or (C) any other form of consideration as the Board may determine and permissible under Applicable Law. 

(2) RSU: Unless otherwise determined by the Board at the time of grant, a RSU Award will be granted in consideration for the
Participant’s services to the Company or an Affiliate, such that the Participant will not be required to make any payment to the Company (other than such services) with respect to the grant or vesting of the RSU Award, or the issuance of any
shares of Class A Common Stock pursuant to the RSU Award. If, at the time of grant, the Board determines that any consideration must be paid by the Participant (in a form other than the Participant’s services to the Company or an
Affiliate) upon the issuance of any shares of Class A Common Stock in settlement of the RSU Award, such consideration may be paid in any form of consideration as the Board may determine and permissible under Applicable Law. 

(iii) Vesting. The Board may impose such restrictions on or conditions to the vesting of a Restricted Stock Award or RSU Award as
determined by the Board. Except as otherwise provided in the Award Agreement or other written agreement between a Participant and the Company or an Affiliate, vesting of Restricted Stock Awards and RSU Awards will cease upon termination of the
Participant’s Continuous Service. 
 (iv) Termination of Continuous Service. Except as otherwise provided in the Award Agreement
or other written agreement between a Participant and the Company or an Affiliate, if a Participant’s Continuous Service terminates for any reason, (i) the Company may receive through a forfeiture condition or a repurchase right any or all
of the shares of Class A Common Stock held by the Participant under his or her Restricted Stock Award that have not vested as of the date of such termination as set forth in the Restricted Stock Award Agreement and (ii) any portion of his
or her RSU Award that has not vested will be forfeited upon such termination and the Participant will have no further right, title or interest in the RSU Award, the shares of Class A Common Stock issuable pursuant to the RSU Award, or any
consideration in respect of the RSU Award. 

  
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 (v) Dividends and Dividend Equivalents. Dividends or dividend equivalents may be paid
or credited, as applicable, with respect to any shares of Class A Common Stock subject to a Restricted Stock Award or RSU Award, as determined by the Board and specified in the Award Agreement). 

(vi) Settlement of RSU Awards. A RSU Award may be settled by the issuance of shares of Class A Common Stock or cash (or any
combination thereof) or in any other form of payment, as determined by the Board and specified in the RSU Award Agreement. At the time of grant, the Board may determine to impose such restrictions or conditions that delay such delivery to a date
following the vesting of the RSU Award. 
 (b) Performance Awards. With respect to any Performance Award, the length of any
Performance Period, the Performance Goals to be achieved during the Performance Period, the other terms and conditions of such Award, and the measure of whether and to what degree such Performance Goals have been attained will be determined by the
Board. 
 (c) Other Awards. Other Awards may be granted either alone or in addition to Awards provided for under Section 4
and the preceding provisions of this Section 5. Subject to the provisions of the Plan, the Board will have sole and complete discretion to determine the persons to whom and the time or times at which such Other Awards will be granted, the
number of shares of Class A Common Stock (or the cash equivalent thereof) to be granted pursuant to such Other Awards and all other terms and conditions of such Other Awards. 

6. ADJUSTMENTS UPON CHANGES IN CLASS A COMMON
STOCK; OTHER CORPORATE EVENTS. 
 (a) Capitalization
Adjustments. In the event of a Capitalization Adjustment, the Board shall appropriately and proportionately adjust: (i) the class(es) and maximum number of shares of Class A Common Stock subject to the Plan and the maximum number of
shares by which the Share Reserve may annually increase pursuant to Section 2(a), (ii) the class(es) and maximum number of shares that may be issued pursuant to the exercise of Incentive Stock Options pursuant to Section 2(a), and
(iii) the class(es) and number of securities and exercise price, strike price or purchase price of Class A Common Stock subject to outstanding Awards. The Board shall make such adjustments, and its determination shall be final, binding and
conclusive. Notwithstanding the foregoing, no fractional shares or rights for fractional shares of Class A Common Stock shall be created in order to implement any Capitalization Adjustment. The Board shall determine an equivalent benefit for
any fractional shares or fractional shares that might be created by the adjustments referred to in the preceding provisions of this Section. 

(b) Dissolution or Liquidation. Except as otherwise provided in the Award Agreement, in the event of a dissolution or liquidation of the
Company, all outstanding Awards (other than Awards consisting of vested and outstanding shares of Class A Common Stock not subject to a forfeiture condition or the Company’s right of repurchase) will terminate immediately prior to the
completion of such dissolution or liquidation, and the shares of Class A Common Stock subject to the Company’s repurchase rights or subject to a forfeiture condition may be repurchased or reacquired by the Company notwithstanding the fact
that the holder of such Award is providing Continuous Service, provided, however, that the Board may determine to cause some or all Awards to become fully vested, exercisable and/or no longer subject to repurchase or forfeiture (to the extent such
Awards have not previously expired or terminated) before the dissolution or liquidation is completed but contingent on its completion. 

(c) Corporate Transaction. The following provisions will apply to Awards in the event of a Corporate Transaction except as set forth in
Section 11, and unless otherwise provided in the instrument evidencing the Award or any other written agreement between the Company or any Affiliate and the Participant or unless otherwise expressly provided by the Board at the time of grant of
an Award. 

  
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 (i) Awards May Be Assumed. In the event of a Corporate Transaction, any surviving
corporation or acquiring corporation (or the surviving or acquiring corporation’s parent company) may assume or continue any or all Awards outstanding under the Plan or may substitute similar awards for Awards outstanding under the Plan
(including but not limited to, awards to acquire the same consideration paid to the stockholders of the Company pursuant to the Corporate Transaction), and any reacquisition or repurchase rights held by the Company in respect of Class A Common
Stock issued pursuant to Awards may be assigned by the Company to the successor of the Company (or the successor’s parent company, if any), in connection with such Corporate Transaction. A surviving corporation or acquiring corporation (or its
parent) may choose to assume or continue only a portion of an Award or substitute a similar award for only a portion of an Award, or may choose to assume or continue the Awards held by some, but not all Participants. The terms of any assumption,
continuation or substitution will be set by the Board. 
 (ii) Awards Held by Current Participants. In the event of a Corporate
Transaction in which the surviving corporation or acquiring corporation (or its parent company) does not assume or continue such outstanding Awards or substitute similar awards for such outstanding Awards, then with respect to Awards that have not
been assumed, continued or substituted and that are held by Participants whose Continuous Service has not terminated prior to the effective time of the Corporate Transaction (referred to as the “Current Participants”), the vesting
of such Awards (and, with respect to Options and Stock Appreciation Rights, the time when such Awards may be exercised) will be accelerated in full to a date prior to the effective time of such Corporate Transaction (contingent upon the
effectiveness of the Corporate Transaction) as the Board determines (or, if the Board does not determine such a date, to the date that is five days prior to the effective time of the Corporate Transaction), and such Awards will terminate if not
exercised (if applicable) at or prior to the effective time of the Corporate Transaction, and any reacquisition or repurchase rights held by the Company with respect to such Awards will lapse (contingent upon the effectiveness of the Corporate
Transaction). With respect to the vesting of Performance Awards that will accelerate upon the occurrence of a Corporate Transaction pursuant to this subsection (ii) and that have multiple vesting levels depending on the level of performance,
unless otherwise provided in the Award Agreement, the vesting of such Performance Awards will accelerate at 100% of the target level upon the occurrence of the Corporate Transaction. With respect to the vesting of Awards that will accelerate upon
the occurrence of a Corporate Transaction pursuant to this subsection (ii) and are settled in the form of a cash payment, such cash payment will be made no later than 30 days following the occurrence of the Corporate Transaction. 

(iii) Awards Held by Persons other than Current Participants. In the event of a Corporate Transaction in which the surviving corporation
or acquiring corporation (or its parent company) does not assume or continue such outstanding Awards or substitute similar awards for such outstanding Awards, then with respect to Awards that have not been assumed, continued or substituted and that
are held by persons other than Current Participants, such Awards will terminate if not exercised (if applicable) prior to the occurrence of the Corporate Transaction; provided, however, that any reacquisition or repurchase rights held by the Company
with respect to such Awards will not terminate and may continue to be exercised notwithstanding the Corporate Transaction. 
 (iv) Payment
for Awards in Lieu of Exercise. Notwithstanding the foregoing, in the event an Award will terminate if not exercised prior to the effective time of a Corporate Transaction, the Board may provide, in its sole discretion, that the holder of such
Award may not exercise such Award but will receive a payment, in such form as may be determined by the Board, equal in value, at the effective time, to the excess, if any, of (1) the value of the property the Participant would have received
upon the exercise of the Award (including, at the discretion of the Board, any unvested portion of such Award), over (2) any exercise price payable by such holder in connection with such exercise. 

  
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 (d) Appointment of Stockholder Representative. As a condition to the receipt of an
Award under this Plan, a Participant will be deemed to have agreed that the Award will be subject to the terms of any agreement governing a Corporate Transaction involving the Company, including, without limitation, a provision for the appointment
of a stockholder representative that is authorized to act on the Participant’s behalf with respect to any escrow, indemnities and any contingent consideration. 

(e) No Restriction on Right to Undertake Transactions. The grant of any Award under the Plan and the issuance of shares pursuant to any
Award does not affect or restrict in any way the right or power of the Company or the stockholders of the Company to make or authorize any adjustment, recapitalization, reorganization or other change in the Company’s capital structure or its
business, any merger or consolidation of the Company, any issue of stock or of options, rights or options to purchase stock or of bonds, debentures, preferred or prior preference stocks whose rights are superior to or affect the Class A Common
Stock or the rights thereof or which are convertible into or exchangeable for Class A Common Stock, or the dissolution or liquidation of the Company, or any sale or transfer of all or any part of its assets or business, or any other corporate
act or proceeding, whether of a similar character or otherwise. 
 7. ADMINISTRATION. 

(a) Administration by Board. The Board will administer the Plan unless and until the Board delegates administration of the Plan to a
Committee or Committees, as provided in subsection (c) below. 
 (b) Powers of Board. The Board will have the power, subject to,
and within the limitations of, the express provisions of the Plan: 
 (i) To determine from time to time: (1) which of the
persons eligible under the Plan will be granted Awards; (2) when and how each Award will be granted; (3) what type or combination of types of Award will be granted; (4) the provisions of each Award granted (which need not be
identical), including the time or times when a person will be permitted to receive an issuance of Class A Common Stock or other payment pursuant to an Award; (5) the number of shares of Class A Common Stock or cash equivalent with
respect to which an Award will be granted to each such person; (6) the Fair Market Value applicable to an Award; and (7) the terms of any Performance Award that is not valued in whole or in part by reference to, or otherwise based on, the
Class A Common Stock, including the amount of cash payment or other property that may be earned and the timing of payment. 
 (ii)
To construe and interpret the Plan and Awards granted under it, and to establish, amend and revoke rules and regulations for its administration. The Board, in the exercise of this power, may correct any defect, omission or inconsistency in the
Plan or in any Award Agreement, in a manner and to the extent it deems necessary or expedient to make the Plan or Award fully effective. 

(iii) To settle all controversies regarding the Plan and Awards granted under it. 

(iv) To accelerate the time at which an Award may first be exercised or the time during which an Award or any part thereof will vest,
notwithstanding the provisions in the Award Agreement stating the time at which it may first be exercised or the time during which it will vest. 

(v) To prohibit the exercise of any Option, SAR or other exercisable Award during a period of up to 30 days prior to the consummation of
any pending stock dividend, stock split, combination or exchange of shares, merger, consolidation or other distribution (other than normal cash dividends) of Company assets to stockholders, or any other change affecting the shares of Class A
Common Stock or the share price of the Class A Common Stock including any Corporate Transaction, for reasons of administrative convenience. 

  
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 (vi) To suspend or terminate the Plan at any time. Suspension or termination of the
Plan will not Materially Impair rights and obligations under any Award granted while the Plan is in effect except with the written consent of the affected Participant. 

(vii) To amend the Plan in any respect the Board deems necessary or advisable; provided, however, that stockholder approval will be
required for any amendment to the extent required by Applicable Law. Except as provided above, rights under any Award granted before amendment of the Plan will not be Materially Impaired by any amendment of the Plan unless (1) the Company
requests the consent of the affected Participant, and (2) such Participant consents in writing. 
 (viii) To submit any amendment
to the Plan for stockholder approval. 
 (ix) To approve forms of Award Agreements for use under the Plan and to amend the terms of
any one or more Awards, including, but not limited to, amendments to provide terms more favorable to the Participant than previously provided in the Award Agreement, subject to any specified limits in the Plan that are not subject to Board
discretion; provided however, that, a Participant’s rights under any Award will not be Materially Impaired by any such amendment unless (1) the Company requests the consent of the affected Participant, and (2) such Participant
consents in writing. 
 (x) Generally, to exercise such powers and to perform such acts as the Board deems necessary or expedient to
promote the best interests of the Company and that are not in conflict with the provisions of the Plan or Awards. 
 (xi) To adopt
such procedures and sub-plans as are necessary or appropriate to permit and facilitate participation in the Plan by, or take advantage of specific tax treatment for Awards granted to, Employees, Directors or
Consultants who are foreign nationals or employed outside the United States (provided that Board approval will not be necessary for immaterial modifications to the Plan or any Award Agreement to ensure or facilitate compliance with the laws of the
relevant foreign jurisdiction). 
 (xii) To effect, at any time and from time to time, subject to the consent of any Participant whose
Award is Materially Impaired by such action, (1) the reduction of the exercise price (or strike price) of any outstanding Option or SAR; (2) the cancellation of any outstanding Option or SAR and the grant in substitution therefor of
(A) a new Option, SAR, Restricted Stock Award, RSU Award or Other Award, under the Plan or another equity plan of the Company, covering the same or a different number of shares of Class A Common Stock, (B) cash and/or (C) other
valuable consideration (as determined by the Board); or (3) any other action that is treated as a repricing under generally accepted accounting principles. 

(c) Delegation to Committee. 

(i) General. The Board may delegate some or all of the administration of the Plan to a Committee or Committees. If administration
of the Plan is delegated to a Committee, the Committee will have, in connection with the administration of the Plan, the powers theretofore possessed by the Board that have been delegated to the Committee, including the power to delegate to another
Committee or a subcommittee of the Committee any of the administrative powers the Committee is authorized to exercise (and references in this Plan to the Board will thereafter be to the Committee or subcommittee), subject, however, to such
resolutions, not inconsistent with the provisions of the Plan, as 

  
 11 

 
may be adopted from time to time by the Board. Each Committee may retain the authority to concurrently administer the Plan with Committee or subcommittee to which it has delegated its authority
hereunder and may, at any time, revest in such Committee some or all of the powers previously delegated. The Board may retain the authority to concurrently administer the Plan with any Committee and may, at any time, revest in the Board some or all
of the powers previously delegated. 
 (ii) Rule 16b-3 Compliance. To the extent an
Award is intended to qualify for the exemption from Section 16(b) of the Exchange Act that is available under Rule 16b-3 of the Exchange Act, the Award will be granted by the Board or a Committee that
consists solely of two or more Non-Employee Directors, as determined under Rule 16b-3(b)(3) of the Exchange Act and thereafter any action establishing or modifying the
terms of the Award will be approved by the Board or a Committee meeting such requirements to the extent necessary for such exemption to remain available. 

(d) Effect of Board’s Decision. All determinations, interpretations and constructions made by the Board or any
Committee in good faith will not be subject to review by any person and will be final, binding and conclusive on all persons. 
 (e)
Delegation to an Officer. The Board or any Committee may delegate to one or more Officers the authority to do one or both of the following (i) designate Employees who are not Officers to be recipients of Options and SARs (and, to the
extent permitted by Applicable Law, other types of Awards) and, to the extent permitted by Applicable Law, the terms thereof, and (ii) determine the number of shares of Class A Common Stock to be subject to such Awards granted to such
Employees; provided, however, that the resolutions or charter adopted by the Board or any Committee evidencing such delegation will specify the total number of shares of Class A Common Stock that may be subject to the Awards granted by such
Officer and that such Officer may not grant an Award to himself or herself. Any such Awards will be granted on the applicable form of Award Agreement most recently approved for use by the Board or the Committee, unless otherwise provided in the
resolutions approving the delegation authority. Notwithstanding anything to the contrary herein, neither the Board nor any Committee may delegate to an Officer who is acting solely in the capacity of an Officer (and not also as a Director) the
authority to determine the Fair Market Value. 
 8. TAX WITHHOLDING 

(a) Withholding Authorization. As a condition to acceptance of any Award under the Plan, a Participant authorizes withholding
from payroll and any other amounts payable to such Participant, and otherwise agree to make adequate provision for (including), any sums required to satisfy any U.S. federal, state, local and/or foreign tax or social insurance contribution
withholding obligations of the Company or an Affiliate, if any, which arise in connection with the exercise, vesting or settlement of such Award, as applicable. Accordingly, a Participant may not be able to exercise an Award even though the Award is
vested, and the Company shall have no obligation to issue shares of Class A Common Stock subject to an Award, unless and until such obligations are satisfied. 

(b) Satisfaction of Withholding Obligation. To the extent permitted by the terms of an Award Agreement, the Company may, in its sole
discretion, satisfy any U.S. federal, state, local and/or foreign tax or social insurance withholding obligation relating to an Award by any of the following means or by a combination of such means: (i) causing the Participant to tender a cash
payment; (ii) withholding shares of Class A Common Stock from the shares of Class A Common Stock issued or otherwise issuable to the Participant in connection with the Award; (iii) withholding cash from an Award settled in cash;
(iv) withholding payment from any amounts otherwise payable to the Participant; (v) by allowing a Participant to effectuate a “cashless exercise” pursuant to a program developed under Regulation T as promulgated by the Federal
Reserve Board, or (vi) by such other method as may be set forth in the Award Agreement. 

  
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 (c) No Obligation to Notify or Minimize Taxes; No Liability to Claims. Except as
required by Applicable Law the Company has no duty or obligation to any Participant to advise such holder as to the time or manner of exercising such Award. Furthermore, the Company has no duty or obligation to warn or otherwise advise such holder
of a pending termination or expiration of an Award or a possible period in which the Award may not be exercised. The Company has no duty or obligation to minimize the tax consequences of an Award to the holder of such Award and will not be liable to
any holder of an Award for any adverse tax consequences to such holder in connection with an Award. As a condition to accepting an Award under the Plan, each Participant (i) agrees to not make any claim against the Company, or any of its
Officers, Directors, Employees or Affiliates related to tax liabilities arising from such Award or other Company compensation and (ii) acknowledges that such Participant was advised to consult with his or her own personal tax, financial and
other legal advisors regarding the tax consequences of the Award and has either done so or knowingly and voluntarily declined to do so. Additionally, each Participant acknowledges any Option or SAR granted under the Plan is exempt from
Section 409A only if the exercise or strike price is at least equal to the “fair market value” of the Class A Common Stock on the date of grant as determined by the Internal Revenue Service and there is no other impermissible
deferral of compensation associated with the Award. Additionally, as a condition to accepting an Option or SAR granted under the Plan, each Participant agrees not make any claim against the Company, or any of its Officers, Directors, Employees or
Affiliates in the event that the Internal Revenue Service asserts that such exercise price or strike price is less than the “fair market value” of the Class A Common Stock on the date of grant as subsequently determined by the
Internal Revenue Service. 
 (d) Withholding Indemnification. As a condition to accepting an Award under the Plan, in the event that
the amount of the Company’s and/or its Affiliate’s withholding obligation in connection with such Award was greater than the amount actually withheld by the Company and/or its Affiliates, each Participant agrees to indemnify and hold the
Company and/or its Affiliates harmless from any failure by the Company and/or its Affiliates to withhold the proper amount. 
 9.
MISCELLANEOUS. 
 (a) Source of Shares. The stock issuable under the Plan will be shares of authorized but unissued
or reacquired Class A Common Stock, including shares repurchased by the Company on the open market or otherwise. 
 (b) Use of
Proceeds from Sales of Class A Common Stock. Proceeds from the sale of shares of Class A Common Stock pursuant to Awards will constitute general funds of the Company. 

(c) Corporate Action Constituting Grant of Awards. Corporate action constituting a grant by the Company of an Award to any Participant
will be deemed completed as of the date of such corporate action, unless otherwise determined by the Board, regardless of when the instrument, certificate, or letter evidencing the Award is communicated to, or actually received or accepted by, the
Participant. In the event that the corporate records (e.g., Board consents, resolutions or minutes) documenting the corporate action approving the grant contain terms (e.g., exercise price, vesting schedule or number of shares) that are inconsistent
with those in the Award Agreement or related grant documents as a result of a clerical error in the Award Agreement or related grant documents, the corporate records will control and the Participant will have no legally binding right to the
incorrect term in the Award Agreement or related grant documents. 

  
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 (d) Stockholder Rights. No Participant will be deemed to be the holder of, or to have
any of the rights of a holder with respect to, any shares of Class A Common Stock subject to such Award unless and until (i) such Participant has satisfied all requirements for exercise of the Award pursuant to its terms, if applicable,
and (ii) the issuance of the Class A Common Stock subject to such Award is reflected in the records of the Company. 
 (e) No
Employment or Other Service Rights. Nothing in the Plan, any Award Agreement or any other instrument executed thereunder or in connection with any Award granted pursuant thereto will confer upon any Participant any right to continue to serve the
Company or an Affiliate in the capacity in effect at the time the Award was granted or affect the right of the Company or an Affiliate to terminate at will and without regard to any future vesting opportunity that a Participant may have with respect
to any Award (i) the employment of an Employee with or without notice and with or without cause, (ii) the service of a Consultant pursuant to the terms of such Consultant’s agreement with the Company or an Affiliate, or (iii) the
service of a Director pursuant to the Bylaws of the Company or an Affiliate, and any applicable provisions of the corporate law of the state or foreign jurisdiction in which the Company or the Affiliate is incorporated, as the case may be. Further,
nothing in the Plan, any Award Agreement or any other instrument executed thereunder or in connection with any Award will constitute any promise or commitment by the Company or an Affiliate regarding the fact or nature of future positions, future
work assignments, future compensation or any other term or condition of employment or service or confer any right or benefit under the Award or the Plan unless such right or benefit has specifically accrued under the terms of the Award Agreement
and/or Plan. 
 (f) Change in Time Commitment. In the event a Participant’s regular level of time commitment in the performance
of his or her services for the Company and any Affiliates is reduced (for example, and without limitation, if the Participant is an Employee of the Company and the Employee has a change in status from a full-time Employee to a part-time Employee or
takes an extended leave of absence) after the date of grant of any Award to the Participant, the Board may determine, to the extent permitted by Applicable Law, to (i) make a corresponding reduction in the number of shares or cash amount
subject to any portion of such Award that is scheduled to vest or become payable after the date of such change in time commitment, and (ii) in lieu of or in combination with such a reduction, extend the vesting or payment schedule applicable to
such Award. In the event of any such reduction, the Participant will have no right with respect to any portion of the Award that is so reduced or extended. 

(g) Execution of Additional Documents. As a condition to accepting an Award under the Plan, the Participant agrees to execute any
additional documents or instruments necessary or desirable, as determined in the Plan Administrator’s sole discretion, to carry out the purposes or intent of the Award, or facilitate compliance with securities and/or other regulatory
requirements, in each case at the Plan Administrator’s request. 
 (h) Electronic Delivery and Participation. Any reference
herein or in an Award Agreement to a “written” agreement or document will include any agreement or document delivered electronically, filed publicly at www.sec.gov (or any successor website thereto) or posted on the Company’s intranet
(or other shared electronic medium controlled by the Company to which the Participant has access). By accepting any Award the Participant consents to receive documents by electronic delivery and to participate in the Plan through any on-line electronic system established and maintained by the Plan Administrator or another third party selected by the Plan Administrator. The form of delivery of any Class A Common Stock (e.g., a stock
certificate or electronic entry evidencing such shares) shall be determined by the Company. 

  
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 (i) Clawback/Recovery. All Awards granted under the Plan will be subject to
recoupment in accordance with any clawback policy that the Company is required to adopt pursuant to the listing standards of any national securities exchange or association on which the Company’s securities are listed or as is otherwise
required by the Dodd-Frank Wall Street Reform and Consumer Protection Act or other Applicable Law and any clawback policy that the Company otherwise adopts, to the extent applicable and permissible under Applicable Law. In addition, the Board may
impose such other clawback, recovery or recoupment provisions in an Award Agreement as the Board determines necessary or appropriate, including but not limited to a reacquisition right in respect of previously acquired shares of Class A Common
Stock or other cash or property upon the occurrence of Cause. No recovery of compensation under such a clawback policy will be an event giving rise to a Participant’s right to voluntary terminate employment upon a “resignation for good
reason,” or for a “constructive termination” or any similar term under any plan of or agreement with the Company. 
 (j)
Securities Law Compliance. A Participant will not be issued any shares in respect of an Award unless either (i) the shares are registered under the Securities Act; or (ii) the Company has determined that such issuance would be exempt
from the registration requirements of the Securities Act. Each Award also must comply with other Applicable Law governing the Award, and a Participant will not receive such shares if the Company determines that such receipt would not be in material
compliance with Applicable Law. 
 (k) Transfer or Assignment of Awards; Issued Shares. Except as expressly provided in the Plan or
the form of Award Agreement, Awards granted under the Plan may not be transferred or assigned by the Participant. After the vested shares subject to an Award have been issued, or in the case of Restricted Stock and similar awards, after the issued
shares have vested, the holder of such shares is free to assign, hypothecate, donate, encumber or otherwise dispose of any interest in such shares provided that any such actions are in compliance with the provisions herein, the terms of the Trading
Policy and Applicable Law. 
 (l) Effect on Other Employee Benefit Plans. The value of any Award granted under the Plan, as determined
upon grant, vesting or settlement, shall not be included as compensation, earnings, salaries, or other similar terms used when calculating any Participant’s benefits under any employee benefit plan sponsored by the Company or any Affiliate,
except as such plan otherwise expressly provides. The Company expressly reserves its rights to amend, modify, or terminate any of the Company’s or any Affiliate’s employee benefit plans. 

(m) Deferrals. To the extent permitted by Applicable Law, the Board, in its sole discretion, may determine that the delivery of
Class A Common Stock or the payment of cash, upon the exercise, vesting or settlement of all or a portion of any Award may be deferred and may also establish programs and procedures for deferral elections to be made by Participants. Deferrals
by will be made in accordance with the requirements of Section 409A. 
 (n) Section 409A. Unless otherwise
expressly provided for in an Award Agreement, the Plan and Award Agreements will be interpreted to the greatest extent possible in a manner that makes the Plan and the Awards granted hereunder exempt from Section 409A, and, to the extent not so
exempt, in compliance with the requirements of Section 409A. If the Board determines that any Award granted hereunder is not exempt from and is therefore subject to Section 409A, the Award Agreement evidencing such Award will incorporate
the terms and conditions necessary to avoid the consequences specified in Section 409A(a)(1) of the Code, and to the extent an Award Agreement is silent on terms necessary for compliance, such terms are hereby incorporated by reference into the
Award Agreement. Notwithstanding anything to the contrary in this Plan (and unless the Award Agreement specifically provides otherwise), if the shares of Class A Common Stock are publicly traded, and if a Participant holding an Award that
constitutes “deferred compensation” under Section 409A is a “specified employee” for purposes of Section 409A, no distribution or payment of any amount that is due because of a “separation from

  
 15 

 
service” (as defined in Section 409A without regard to alternative definitions thereunder) will be issued or paid before the date that is six months and one day following the date of
such Participant’s “separation from service” or, if earlier, the date of the Participant’s death, unless such distribution or payment can be made in a manner that complies with Section 409A, and any amounts so deferred will
be paid in a lump sum on the day after such six month period elapses, with the balance paid thereafter on the original schedule. 
 (o)
Choice of Law. This Plan and any controversy arising out of or relating to this Plan shall be governed by, and construed in accordance with, the internal laws of the State of Delaware, without regard to conflict of law principles that would
result in any application of any law other than the law of the State of Delaware. 
 10. COVENANTS OF THE
COMPANY. 
 (a) Compliance with Law. The Company will seek to obtain from each regulatory commission or
agency, as may be deemed to be necessary, having jurisdiction over the Plan such authority as may be required to grant Awards and to issue and sell shares of Class A Common Stock upon exercise or vesting of the Awards; provided, however, that
this undertaking will not require the Company to register under the Securities Act the Plan, any Award or any Class A Common Stock issued or issuable pursuant to any such Award. If, after reasonable efforts and at a reasonable cost, the Company
is unable to obtain from any such regulatory commission or agency the authority that counsel for the Company deems necessary or advisable for the lawful issuance and sale of Class A Common Stock under the Plan, the Company will be relieved from
any liability for failure to issue and sell Class A Common Stock upon exercise or vesting of such Awards unless and until such authority is obtained. A Participant is not eligible for the grant of an Award or the subsequent issuance of
Class A Common Stock pursuant to the Award if such grant or issuance would be in violation of any Applicable Law. 
 11. ADDITIONAL
RULES FOR AWARDS SUBJECT TO SECTION 409A. 

(a) Application. Unless the provisions of this Section of the Plan are expressly superseded by the provisions in the form of Award
Agreement, the provisions of this Section shall apply and shall supersede anything to the contrary set forth in the Award Agreement for a Non-Exempt Award. 

(b) Non-Exempt Awards Subject to Non-Exempt Severance
Arrangements. To the extent a Non-Exempt Award is subject to Section 409A due to application of a Non-Exempt Severance Arrangement, the following provisions of
this subsection (b) apply. 
 (i) If the Non-Exempt Award vests in the ordinary course
during the Participant’s Continuous Service in accordance with the vesting schedule set forth in the Award Agreement, and does not accelerate vesting under the terms of a Non-Exempt Severance Arrangement,
in no event will the shares be issued in respect of such Non-Exempt Award any later than the later of: (i) December 31st of the calendar year that
includes the applicable vesting date, or (ii) the 60th day that follows the applicable vesting date. 

(ii) If vesting of the Non-Exempt Award accelerates under the terms of a Non-Exempt Severance Arrangement in connection with the Participant’s Separation from Service, and such vesting acceleration provisions were in effect as of the date of grant of the Non-Exempt Award and, therefore, are part of the terms of such Non-Exempt Award as of the date of grant, then the shares will be earlier issued in settlement of such Non-Exempt Award upon the Participant’s Separation from Service in accordance with the terms of the Non-Exempt Severance Arrangement, but in no event later than the 60th day that follows the date of the Participant’s Separation from Service. However, if at the time the 

  
 16 

 
shares would otherwise be issued the Participant is subject to the distribution limitations contained in Section 409A applicable to “specified employees,” as defined in
Section 409A(a)(2)(B)(i) of the Code, such shares shall not be issued before the date that is six months following the date of such Participant’s Separation from Service, or, if earlier, the date of the Participant’s death that occurs
within such six month period. 
 (iii) If vesting of a Non-Exempt Award accelerates under the
terms of a Non-Exempt Severance Arrangement in connection with a Participant’s Separation from Service, and such vesting acceleration provisions were not in effect as of the date of grant of the Non-Exempt Award and, therefore, are not a part of the terms of such Non-Exempt Award on the date of grant, then such acceleration of vesting of the Non-Exempt Award shall not accelerate the issuance date of the shares, but the shares shall instead be issued on the same schedule as set forth in the Grant Notice as if they had vested in the ordinary course during
the Participant’s Continuous Service, notwithstanding the vesting acceleration of the Non-Exempt Award. Such issuance schedule is intended to satisfy the requirements of payment on a specified date or
pursuant to a fixed schedule, as provided under Treasury Regulations Section 1.409A-3(a)(4). 

(c) Treatment of Non-Exempt Awards Upon a Corporate Transaction for Employees and Consultants.
The provisions of this subsection (c) shall apply and shall supersede anything to the contrary set forth in the Plan with respect to the permitted treatment of any Non-Exempt Award in connection with a
Corporate Transaction if the Participant was either an Employee or Consultant upon the applicable date of grant of the Non-Exempt Award. 

(i) Vested Non-Exempt Awards. The following provisions shall apply to any Vested Non-Exempt Award in connection with a Corporate Transaction: 
 (1) If the Corporate Transaction is
also a Section 409A Change in Control then the Acquiring Entity may not assume, continue or substitute the Vested Non-Exempt Award. Upon the Section 409A Change in Control the settlement of the
Vested Non-Exempt Award will automatically be accelerated and the shares will be immediately issued in respect of the Vested Non-Exempt Award. Alternatively, the Company
may instead provide that the Participant will receive a cash settlement equal to the Fair Market Value of the shares that would otherwise be issued to the Participant upon the Section 409A Change in Control. 

(2) If the Corporate Transaction is not also a Section 409A Change in Control, then the Acquiring Entity must either assume,
continue or substitute each Vested Non-Exempt Award. The shares to be issued in respect of the Vested Non-Exempt Award shall be issued to the Participant by the
Acquiring Entity on the same schedule that the shares would have been issued to the Participant if the Corporate Transaction had not occurred. In the Acquiring Entity’s discretion, in lieu of an issuance of shares, the Acquiring Entity may
instead substitute a cash payment on each applicable issuance date, equal to the Fair Market Value of the shares that would otherwise be issued to the Participant on such issuance dates, with the determination of the Fair Market Value of the shares
made on the date of the Corporate Transaction. 

  
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 (ii) Unvested Non-Exempt Awards. The
following provisions shall apply to any Unvested Non-Exempt Award unless otherwise determined by the Board pursuant to subsection (e) of this Section. 

(1) In the event of a Corporate Transaction, the Acquiring Entity shall assume, continue or substitute any Unvested Non-Exempt Award. Unless otherwise determined by the Board, any Unvested Non-Exempt Award will remain subject to the same vesting and forfeiture restrictions that were
applicable to the Award prior to the Corporate Transaction. The shares to be issued in respect of any Unvested Non-Exempt Award shall be issued to the Participant by the Acquiring Entity on the same schedule
that the shares would have been issued to the Participant if the Corporate Transaction had not occurred. In the Acquiring Entity’s discretion, in lieu of an issuance of shares, the Acquiring Entity may instead substitute a cash payment on each
applicable issuance date, equal to the Fair Market Value of the shares that would otherwise be issued to the Participant on such issuance dates, with the determination of Fair Market Value of the shares made on the date of the Corporate Transaction.

 (2) If the Acquiring Entity will not assume, substitute or continue any Unvested
Non-Exempt Award in connection with a Corporate Transaction, then such Award shall automatically terminate and be forfeited upon the Corporate Transaction with no consideration payable to any Participant in
respect of such forfeited Unvested Non-Exempt Award. Notwithstanding the foregoing, to the extent permitted and in compliance with the requirements of Section 409A, the Board may in its discretion
determine to elect to accelerate the vesting and settlement of the Unvested Non-Exempt Award upon the Corporate Transaction, or instead substitute a cash payment equal to the Fair Market Value of such shares
that would otherwise be issued to the Participant, as further provided in subsection (e)(ii) below. In the absence of such discretionary election by the Board, any Unvested Non-Exempt Award shall be forfeited
without payment of any consideration to the affected Participants if the Acquiring Entity will not assume, substitute or continue the Unvested Non-Exempt Awards in connection with the Corporate Transaction.

 (3) The foregoing treatment shall apply with respect to all Unvested Non-Exempt Awards
upon any Corporate Transaction, and regardless of whether or not such Corporate Transaction is also a Section 409A Change in Control. 

(d) Treatment of Non-Exempt Awards Upon a Corporate Transaction for
Non-Employee Directors. The following provisions of this subsection (d) shall apply and shall supersede anything to the contrary that may be set forth in the Plan with respect to the permitted
treatment of a Non-Exempt Director Award in connection with a Corporate Transaction. 
 (i) If
the Corporate Transaction is also a Section 409A Change in Control then the Acquiring Entity may not assume, continue or substitute the Non-Exempt Director Award. Upon the Section 409A Change in
Control the vesting and settlement of any Non-Exempt Director Award will automatically be accelerated and the shares will be immediately issued to the Participant in respect of the Non-Exempt Director Award. Alternatively, the Company may provide that the Participant will instead receive a cash settlement equal to the Fair Market Value of the shares that would otherwise be issued to the
Participant upon the Section 409A Change in Control pursuant to the preceding provision. 
 (ii) If the Corporate Transaction is
not also a Section 409A Change in Control, then the Acquiring Entity must either assume, continue or substitute the Non-Exempt Director Award. Unless otherwise determined by the Board, the Non-Exempt Director Award will remain subject to the same vesting and forfeiture restrictions that were applicable to the Award prior to the Corporate Transaction. The shares to be issued in respect of the Non-Exempt Director Award shall be issued to the Participant by the Acquiring Entity on the same schedule that the shares would have been issued to the Participant if the Corporate Transaction had not occurred. In
the Acquiring Entity’s discretion, in lieu of an issuance of shares, the Acquiring Entity may instead substitute a cash payment on each applicable issuance date, equal to the Fair Market Value of the shares that would otherwise be issued to the
Participant on such issuance dates, with the determination of Fair Market Value made on the date of the Corporate Transaction. 

  
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 (e) If the RSU Award is a Non-Exempt Award,
then the provisions in this Section 11(e) shall apply and supersede anything to the contrary that may be set forth in the Plan or the Award Agreement with respect to the permitted treatment of such
Non-Exempt Award: 
 (i) Any exercise by the Board of discretion to accelerate the vesting of
a Non-Exempt Award shall not result in any acceleration of the scheduled issuance dates for the shares in respect of the Non-Exempt Award unless earlier issuance of the
shares upon the applicable vesting dates would be in compliance with the requirements of Section 409A. 
 (ii) The Company
explicitly reserves the right to earlier settle any Non-Exempt Award to the extent permitted and in compliance with the requirements of Section 409A, including pursuant to any of the exemptions available
in Treasury Regulations Section 1.409A-3(j)(4)(ix). 
 (iii) To the extent the terms of
any Non-Exempt Award provide that it will be settled upon a Change in Control or Corporate Transaction, to the extent it is required for compliance with the requirements of Section 409A, the Change in
Control or Corporate Transaction event triggering settlement must also constitute a Section 409A Change in Control. To the extent the terms of a Non-Exempt Award provides that it will be settled upon a
termination of employment or termination of Continuous Service, to the extent it is required for compliance with the requirements of Section 409A, the termination event triggering settlement must also constitute a Separation From Service.
However, if at the time the shares would otherwise be issued to a Participant in connection with a “separation from service” such Participant is subject to the distribution limitations contained in Section 409A applicable to
“specified employees,” as defined in Section 409A(a)(2)(B)(i) of the Code, such shares shall not be issued before the date that is six months following the date of the Participant’s Separation From Service, or, if earlier, the
date of the Participant’s death that occurs within such six month period. 
 (iv) The provisions in this subsection (e) for
delivery of the shares in respect of the settlement of a RSU Award that is a Non-Exempt Award are intended to comply with the requirements of Section 409A so that the delivery of the shares to the
Participant in respect of such Non-Exempt Award will not trigger the additional tax imposed under Section 409A, and any ambiguities herein will be so interpreted. 

12. SEVERABILITY. 
 If all
or any part of the Plan or any Award Agreement is declared by any court or governmental authority to be unlawful or invalid, such unlawfulness or invalidity shall not invalidate any portion of the Plan or such Award Agreement not declared to be
unlawful or invalid. Any Section of the Plan or any Award Agreement (or part of such a Section) so declared to be unlawful or invalid shall, if possible, be construed in a manner which will give effect to the terms of such Section or part of a
Section to the fullest extent possible while remaining lawful and valid. 
 13. TERMINATION OF THE
PLAN. 
 The Board may suspend or terminate the Plan at any time. No Incentive Stock Options may be granted after the tenth anniversary of
the earlier of: (i) the Adoption Date, or (ii) the date the Plan is approved by the Company’s stockholders. No Awards may be granted under the Plan while the Plan is suspended or after it is terminated. 

  
 19 

 14. DEFINITIONS. 

As used in the Plan, the following definitions apply to the capitalized terms indicated below: 

(a) “Acquiring Entity” means the surviving or acquiring corporation (or its parent company) in connection with a
Corporate Transaction. 
 (b) “Adoption Date” means the date the Plan is first approved by the Board or
Compensation Committee. 
 (c) “Affiliate” means, at the time of determination, any “parent” or
“subsidiary” of the Company as such terms are defined in Rule 405 promulgated under the Securities Act. The Board may determine the time or times at which “parent” or “subsidiary” status is determined within the
foregoing definition. 
 (d) “Applicable Law” means shall mean any applicable securities, federal, state,
foreign, material local or municipal or other law, statute, constitution, principle of common law, resolution, ordinance, code, edict, decree, rule, listing rule, regulation, judicial decision, ruling or requirement issued, enacted, adopted,
promulgated, implemented or otherwise put into effect by or under the authority of any Governmental Body (including under the authority of any applicable self-regulating organization such as the Nasdaq Stock Market, New York Stock Exchange, or the
Financial Industry Regulatory Authority). 
 (e) “Award” means any right to receive Class A Common Stock,
cash or other property granted under the Plan (including an Incentive Stock Option, a Nonstatutory Stock Option, a Restricted Stock Award, a RSU Award, a SAR, a Performance Award or any Other Award). 

(f) “Award Agreement” means a written agreement between the Company and a Participant evidencing the terms and
conditions of an Award. The Award Agreement generally consists of the Grant Notice and the agreement containing the written summary of the general terms and conditions applicable to the Award and which is provided to a Participant along with the
Grant Notice. 
 (g) “Board” means the Board of Directors of the Company (or its designee). Any decision or
determination made by the Board shall be a decision or determination that is made in the sole discretion of the Board (or its designee), and such decision or determination shall be final and binding on all Participants. 

(h) “Capitalization Adjustment” means any change that is made in, or other events that occur with respect
to, the Class A Common Stock subject to the Plan or subject to any Award after the Effective Date without the receipt of consideration by the Company through merger, consolidation, reorganization, recapitalization, reincorporation, stock
dividend, dividend in property other than cash, large nonrecurring cash dividend, stock split, reverse stock split, liquidating dividend, combination of shares, exchange of shares, change in corporate structure or any similar equity restructuring
transaction, as that term is used in Statement of Financial Accounting Standards Board Accounting Standards Codification Topic 718 (or any successor thereto). Notwithstanding the foregoing, the conversion of any convertible securities of the Company
will not be treated as a Capitalization Adjustment. 
 (i) “Capital Stock” means the Class A Common Stock
and the Class B Common Stock. 

  
 20 

 (j) “Cause” has the meaning ascribed to such
term in any written agreement between the Participant and the Company defining such term and, in the absence of such agreement, such term means, with respect to a Participant, the occurrence of any of the following events: (i) such
Participant’s attempted commission of, or participation in, a fraud or act of dishonesty against the Company; (ii) such Participant’s intentional, material violation of any contract or agreement between the Participant and the Company
or of any statutory duty owed to the Company; (iii) such Participant’s unauthorized use or disclosure of the Company’s confidential information or trade secrets; or (iv) such Participant’s gross misconduct. The determination
that a termination of the Participant’s Continuous Service is either for Cause or without Cause will be made by the Board with respect to Participants who are executive officers of the Company and by the Company’s Chief Executive Officer
with respect to Participants who are not executive officers of the Company. Any determination by the Company that the Continuous Service of a Participant was terminated with or without Cause for the purposes of outstanding Awards held by such
Participant will have no effect upon any determination of the rights or obligations of the Company or such Participant for any other purpose. 

(k) “Change in Control” means the occurrence, in a single transaction or in a series of related transactions, of
any one or more of the following events; provided, however, to the extent necessary to avoid adverse personal income tax consequences to the Participant in connection with an Award, also constitutes a Section 409A Change in Control: 

(i) any Exchange Act Person becomes the Owner, directly or indirectly, of securities of the Company representing more than 50% of the
combined voting power of the Company’s then outstanding securities other than by virtue of a merger, consolidation or similar transaction. Notwithstanding the foregoing, a Change in Control shall not be deemed to occur (A) on account of
the acquisition of securities of the Company directly from the Company, (B) on account of the acquisition of securities of the Company by an investor, any affiliate thereof or any other Exchange Act Person that acquires the Company’s
securities in a transaction or series of related transactions the primary purpose of which is to obtain financing for the Company through the issuance of equity securities, or (C) solely because the level of Ownership held by any Exchange Act
Person (the “Subject Person”) exceeds the designated percentage threshold of the outstanding voting securities as a result of a repurchase or other acquisition of voting securities by the Company reducing the number of shares
outstanding, provided that if a Change in Control would occur (but for the operation of this sentence) as a result of the acquisition of voting securities by the Company, and after such share acquisition, the Subject Person becomes the Owner of any
additional voting securities that, assuming the repurchase or other acquisition had not occurred, increases the percentage of the then outstanding voting securities Owned by the Subject Person over the designated percentage threshold, then a Change
in Control shall be deemed to occur; 
 (ii) there is consummated a merger, consolidation or similar transaction involving (directly
or indirectly) the Company and, immediately after the consummation of such merger, consolidation or similar transaction, the stockholders of the Company immediately prior thereto do not Own, directly or indirectly, either (A) outstanding voting
securities representing more than 50% of the combined outstanding voting power of the surviving Entity in such merger, consolidation or similar transaction or (B) more than 50% of the combined outstanding voting power of the parent of the
surviving Entity in such merger, consolidation or similar transaction, in each case in substantially the same proportions as their Ownership of the outstanding voting securities of the Company immediately prior to such transaction; 

(iii) the stockholders of the Company approve or the Board approves a plan of complete dissolution or liquidation of the Company, or a
complete dissolution or liquidation of the Company shall otherwise occur, except for a liquidation into a parent corporation; 

  
 21 

 (iv) there is consummated a sale, lease, exclusive license or other disposition of
all or substantially all of the consolidated assets of the Company and its Subsidiaries, other than a sale, lease, license or other disposition of all or substantially all of the consolidated assets of the Company and its Subsidiaries to an Entity,
more than 50% of the combined voting power of the voting securities of which are Owned by stockholders of the Company in substantially the same proportions as their Ownership of the outstanding voting securities of the Company immediately prior to
such sale, lease, license or other disposition; or 
 (v) individuals who, on the date the Plan is adopted by the Board, are members
of the Board (the “Incumbent Board”) cease for any reason to constitute at least a majority of the members of the Board; provided, however, that if the appointment or election (or nomination for election) of any new Board
member was approved or recommended by a majority vote of the members of the Incumbent Board then still in office, such new member shall, for purposes of this Plan, be considered as a member of the Incumbent Board. 

Notwithstanding the foregoing or any other provision of this Plan, (A) the term Change in Control shall not include a sale of assets,
merger or other transaction effected exclusively for the purpose of changing the domicile of the Company, and (B) the definition of Change in Control (or any analogous term) in an individual written agreement between the Company or any
Affiliate and the Participant shall supersede the foregoing definition with respect to Awards subject to such agreement; provided, however, that if no definition of Change in Control or any analogous term is set forth in such an individual written
agreement, the foregoing definition shall apply. 
 (l) “Class A Common
Stock” means Class A common stock of the Company. 
 (m) “Class B Common
Stock” means Class B common stock of the Company. 
 (n) “Code” means the Internal Revenue
Code of 1986, as amended, including any applicable regulations and guidance thereunder. 
 (o) “Committee”
means the Compensation Committee and any other committee of one or more Directors to whom authority has been delegated by the Board or Compensation Committee in accordance with the Plan. 

(p) “Company” means Datadog, Inc., a Delaware corporation. 

(q) “Compensation Committee” means the Compensation Committee of the Board. 

(r) “Consultant” means any person, including an advisor, who is (i) engaged by the Company or an Affiliate
to render consulting or advisory services and is compensated for such services, or (ii) serving as a member of the board of directors of an Affiliate and is compensated for such services. However, service solely as a Director, or payment of a
fee for such service, will not cause a Director to be considered a “Consultant” for purposes of the Plan. Notwithstanding the foregoing, a person is treated as a Consultant under this Plan only if a Form S-8 Registration Statement under the Securities Act is available to register either the offer or the sale of the Company’s securities to such person. 

(s) “Continuous Service” means that the Participant’s service with the Company or an Affiliate, whether as
an Employee, Director or Consultant, is not interrupted or terminated. A change in the capacity in which the Participant renders service to the Company or an Affiliate as an Employee, Director or Consultant or a change in the Entity for which the
Participant renders such service, provided that there is no interruption or termination of the Participant’s service with the Company or an Affiliate, will not terminate a Participant’s Continuous Service; provided, however, that if the
Entity for which a Participant is rendering services ceases to qualify as an Affiliate, as determined by the Board, such 

  
 22 

 
Participant’s Continuous Service will be considered to have terminated on the date such Entity ceases to qualify as an Affiliate. For example, a change in status from an Employee of the
Company to a Consultant of an Affiliate or to a Director will not constitute an interruption of Continuous Service. To the extent permitted by law, the Board or the chief executive officer of the Company, in that party’s sole discretion, may
determine whether Continuous Service will be considered interrupted in the case of (i) any leave of absence approved by the Board or chief executive officer, including sick leave, military leave or any other personal leave, or
(ii) transfers between the Company, an Affiliate, or their successors. Notwithstanding the foregoing, a leave of absence will be treated as Continuous Service for purposes of vesting in an Award only to such extent as may be provided in the
Company’s leave of absence policy, in the written terms of any leave of absence agreement or policy applicable to the Participant, or as otherwise required by law. In addition, to the extent required for exemption from or compliance with
Section 409A, the determination of whether there has been a termination of Continuous Service will be made, and such term will be construed, in a manner that is consistent with the definition of “separation from service” as defined
under Treasury Regulation Section 1.409A-1(h) (without regard to any alternative definition thereunder). 

(t) “Corporate Transaction” means the consummation, in a single transaction or in a series of related
transactions, of any one or more of the following events: 
 (i) a sale or other disposition of all or substantially all, as
determined by the Board, of the consolidated assets of the Company and its Subsidiaries; 
 (ii) a sale or other disposition of at
least 50% of the outstanding securities of the Company; 
 (iii) a merger, consolidation or similar transaction following which the
Company is not the surviving corporation; or 
 (iv) a merger, consolidation or similar transaction following which the Company is the
surviving corporation but the shares of Capital Stock outstanding immediately preceding the merger, consolidation or similar transaction are converted or exchanged by virtue of the merger, consolidation or similar transaction into other property,
whether in the form of securities, cash or otherwise. 
 (u) “Director” means a member of the Board. 

(v) “determine” or “determined” means as determined by the
Board or the Committee (or its designee) in its sole discretion. 
 (w) “Disability” means, with respect to a
Participant, such Participant is unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a
continuous period of not less than 12 months, as provided in Section 22(e)(3) of the Code, and will be determined by the Board on the basis of such medical evidence as the Board deems warranted under the circumstances. 

(x) “Effective Date” means the IPO Date, provided this Plan is approved by the Company’s stockholders prior
to the IPO Date. 
 (y) “Employee” means any person employed by the Company or an Affiliate. However, service
solely as a Director, or payment of a fee for such services, will not cause a Director to be considered an “Employee” for purposes of the Plan. 

  
 23 

 (z) “Employer” means the Company or the Affiliate of the
Company that employs the Participant. 
 (aa) “Entity” means a corporation, partnership, limited liability
company or other entity. 
 (bb) “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the
rules and regulations promulgated thereunder. 
 (cc) “Exchange Act Person” means any natural
person, Entity or “group” (within the meaning of Section 13(d) or 14(d) of the Exchange Act), except that “Exchange Act Person” will not include (i) the Company or any Subsidiary of the Company, (ii) any employee
benefit plan of the Company or any Subsidiary of the Company or any trustee or other fiduciary holding securities under an employee benefit plan of the Company or any Subsidiary of the Company, (iii) an underwriter temporarily holding
securities pursuant to a registered public offering of such securities, (iv) an Entity Owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their Ownership of stock of the Company; or
(v) any natural person, Entity or “group” (within the meaning of Section 13(d) or 14(d) of the Exchange Act) that, as of the Effective Date, is the Owner, directly or indirectly, of securities of the Company representing more
than 50% of the combined voting power of the Company’s then outstanding securities. 
 (dd) “Fair Market
Value” means, as of any date, unless otherwise determined by the Board, the value of the Class A Common Stock (as determined on a per share or aggregate basis, as applicable) determined as follows: 

(i) If the Class A Common Stock is listed on any established stock exchange or traded on any established market,
the Fair Market Value will be the closing sales price for such stock as quoted on such exchange or market (or the exchange or market with the greatest volume of trading in the Class A Common Stock) on the date of determination, as reported in a
source the Board deems reliable. 
 (ii) If there is no closing sales price for the Class A Common Stock on the
date of determination, then the Fair Market Value will be the closing selling price on the last preceding date for which such quotation exists. 

(iii) In the absence of such markets for the Class A Common Stock, or if otherwise determined by the Board, the
Fair Market Value will be determined by the Board in good faith and in a manner that complies with Sections 409A and 422 of the Code. 

(ee) “Governmental Body” means any: (a) nation, state, commonwealth, province,
territory, county, municipality, district or other jurisdiction of any nature; (b) federal, state, local, municipal, foreign or other government; (c) governmental or regulatory body, or quasi-governmental body of any nature (including any
governmental division, department, administrative agency or bureau, commission, authority, instrumentality, official, ministry, fund, foundation, center, organization, unit, body or Entity and any court or other tribunal, and for the avoidance of
doubt, any Tax authority) or other body exercising similar powers or authority; or (d) self-regulatory organization (including the Nasdaq Stock Market, New York Stock Exchange, and the Financial Industry Regulatory Authority). 

(ff) “Grant Notice” means the notice provided to a Participant that he or she has been granted an
Award under the Plan and which includes the name of the Participant, the type of Award, the date of grant of the Award, number of shares of Class A Common Stock subject to the Award or potential cash payment right, (if any), the vesting
schedule for the Award (if any) and other key terms applicable to the Award. 

  
 24 

 (gg) “Incentive Stock Option” means an option granted
pursuant to Section 4 of the Plan that is intended to be, and qualifies as, an “incentive stock option” within the meaning of Section 422 of the Code. 

(hh) “IPO Date” means the date of the underwriting agreement between the Company and the underwriter(s) managing
the initial public offering of the Class A Common Stock, pursuant to which the Class A Common Stock is priced for the initial public offering. 

(ii) “Materially Impair” means any amendment to the terms of the Award that materially adversely
affects the Participant’s rights under the Award. A Participant’s rights under an Award will not be deemed to have been Materially Impaired by any such amendment if the Board, in its sole discretion, determines that the amendment, taken as
a whole, does not materially impair the Participant’s rights. For example, the following types of amendments to the terms of an Award do not Materially Impair the Participant’s rights under the Award: (i) imposition of reasonable
restrictions on the minimum number of shares subject to an Option that may be exercised, (ii) to maintain the qualified status of the Award as an Incentive Stock Option under Section 422 of the Code; (iii) to change the terms of an
Incentive Stock Option in a manner that disqualifies, impairs or otherwise affects the qualified status of the Award as an Incentive Stock Option under Section 422 of the Code; (iv) to clarify the manner of exemption from, or to bring the
Award into compliance with or qualify it for an exemption from, Section 409A; or (v) to comply with other Applicable Laws. 

(jj) “Non-Employee Director” means a Director who either
(i) is not a current employee or officer of the Company or an Affiliate, does not receive compensation, either directly or indirectly, from the Company or an Affiliate for services rendered as a consultant or in any capacity other than as a
Director (except for an amount as to which disclosure would not be required under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act (“Regulation
S-K”)), does not possess an interest in any other transaction for which disclosure would be required under Item 404(a) of Regulation S-K, and is not engaged
in a business relationship for which disclosure would be required pursuant to Item 404(b) of Regulation S-K; or (ii) is otherwise considered a
“non-employee director” for purposes of Rule 16b-3. 

(kk) “Non-Exempt Award” means any Award that is subject
to, and not exempt from, Section 409A, including as the result of (i) a deferral of the issuance of the shares subject to the Award which is elected by the Participant or imposed by the Company or (ii) the terms of any Non-Exempt Severance Agreement. 
 (ll)
“Non-Exempt Director Award” means a Non-Exempt Award granted to a Participant who was a Director but not an Employee on the applicable grant
date. 
 (mm) Non-Exempt Severance Arrangement means a severance arrangement or
other agreement between the Participant and the Company that provides for acceleration of vesting of an Award and issuance of the shares in respect of such Award upon the Participant’s termination of employment or separation from service (as
such term is defined in Section 409A(a)(2)(A)(i) of the Code (and without regard to any alternative definition thereunder) (“Separation from Service”) and such severance benefit does not satisfy the requirements for an
exemption from application of Section 409A provided under Treasury Regulations Section 1.409A-1(b)(4), 1.409A-1(b)(9) or otherwise. 

(nn) “Nonstatutory Stock Option” means any option granted pursuant to Section 4 of the Plan that does not
qualify as an Incentive Stock Option. 

  
 25 

 (oo) “Officer” means a person who is an officer of the
Company within the meaning of Section 16 of the Exchange Act. 
 (pp) “Option” means an Incentive Stock
Option or a Nonstatutory Stock Option to purchase shares of Class A Common Stock granted pursuant to the Plan. 
 (qq)
“Option Agreement” means a written agreement between the Company and the Optionholder evidencing the terms and conditions of the Option grant. The Option Agreement includes the Grant Notice for the Option and the
agreement containing the written summary of the general terms and conditions applicable to the Option and which is provided to a Participant along with the Grant Notice. Each Option Agreement will be subject to the terms and conditions of the Plan.

 (rr) “Optionholder” means a person to whom an Option is granted pursuant to the Plan or, if applicable,
such other person who holds an outstanding Option. 
 (ss) “Other Award” means an award valued in whole or in
part by reference to, or otherwise based on, Class A Common Stock, including the appreciation in value thereof (e.g., options or stock rights with an exercise price or strike price less than 100% of the Fair Market Value at the time of grant)
that is not an Incentive Stock Options, Nonstatutory Stock Option, SAR, Restricted Stock Award, RSU Award or Performance Award. 
 (tt)
“Other Award Agreement” means a written agreement between the Company and a holder of an Other Award evidencing the terms and conditions of an Other Award grant. Each Other Award Agreement will be subject to
the terms and conditions of the Plan. 
 (uu) “Own,” “Owned,”
“Owner,” “Ownership” means that a person or Entity will be deemed to “Own,” to have “Owned,” to be the “Owner” of, or to have acquired
“Ownership” of securities if such person or Entity, directly or indirectly, through any contract, arrangement, understanding, relationship or otherwise, has or shares voting power, which includes the power to vote or to direct the voting,
with respect to such securities. 
 (vv) “Participant” means an Employee, Director or Consultant to whom an
Award is granted pursuant to the Plan or, if applicable, such other person who holds an outstanding Award. 
 (ww)
“Performance Award” means an Award that may vest or may be exercised or a cash award that may vest or become earned and paid contingent upon the attainment during a Performance Period of certain Performance Goals and
which is granted under the terms and conditions of Section 5(b) pursuant to such terms as are approved by the Board. In addition, to the extent permitted by Applicable Law and set forth in the applicable Award Agreement, the Board may determine
that cash or other property may be used in payment of Performance Awards. Performance Awards that are settled in cash or other property are not required to be valued in whole or in part by reference to, or otherwise based on, the Class A Common
Stock. 
 (xx) “Performance Criteria” means the one or more criteria that the Board will select for purposes
of establishing the Performance Goals for a Performance Period. The Performance Criteria that will be used to establish such Performance Goals may be based on any one of, or combination of, the following as determined by the Board: earnings
(including earnings per share and net earnings); earnings before interest, taxes and depreciation; earnings before interest, taxes, depreciation and amortization; total stockholder return; return on equity or average stockholder’s equity;
return on assets, investment, or capital employed; stock price; margin (including gross margin); income (before or after taxes); operating income; operating income after taxes; pre-tax profit; operating cash
flow; sales or revenue targets; 

  
 26 

 
increases in revenue or product revenue; expenses and cost reduction goals; improvement in or attainment of working capital levels; economic value added (or an equivalent metric); market share;
cash flow; cash flow per share; share price performance; debt reduction; customer satisfaction; stockholders’ equity; capital expenditures; debt levels; operating profit or net operating profit; workforce diversity; growth of net income or
operating income; billings; financing; regulatory milestones; stockholder liquidity; corporate governance and compliance; intellectual property; personnel matters; progress of internal research; progress of partnered programs; partner satisfaction;
budget management; partner or collaborator achievements; internal controls, including those related to the Sarbanes-Oxley Act of 2002; investor relations, analysts and communication; implementation or completion of projects or processes; employee
retention; number of users, including unique users; strategic partnerships or transactions (including in-licensing and out-licensing of intellectual property);
establishing relationships with respect to the marketing, distribution and sale of the Company’s products; supply chain achievements; co-development, co-marketing,
profit sharing, joint venture or other similar arrangements; individual performance goals; corporate development and planning goals; and other measures of performance selected by the Board or Committee. 

(yy) “Performance Goals” means, for a Performance Period, the one or more goals established by the Board for the
Performance Period based upon the Performance Criteria. Performance Goals may be based on a Company-wide basis, with respect to one or more business units, divisions, Affiliates, or business segments, and in either absolute terms or relative to the
performance of one or more comparable companies or the performance of one or more relevant indices. Unless specified otherwise by the Board (i) in the Award Agreement at the time the Award is granted or (ii) in such other document setting
forth the Performance Goals at the time the Performance Goals are established, the Board will appropriately make adjustments in the method of calculating the attainment of Performance Goals for a Performance Period as follows: (1) to exclude
restructuring and/or other nonrecurring charges; (2) to exclude exchange rate effects; (3) to exclude the effects of changes to generally accepted accounting principles; (4) to exclude the effects of any statutory adjustments to
corporate tax rates; (5) to exclude the effects of items that are “unusual” in nature or occur “infrequently” as determined under generally accepted accounting principles; (6) to exclude the dilutive effects of
acquisitions or joint ventures; (7) to assume that any business divested by the Company achieved performance objectives at targeted levels during the balance of a Performance Period following such divestiture; (8) to exclude the effect of
any change in the outstanding shares of Capital Stock of the Company by reason of any stock dividend or split, stock repurchase, reorganization, recapitalization, merger, consolidation, spin-off, combination
or exchange of shares or other similar corporate change, or any distributions to common stockholders other than regular cash dividends; (9) to exclude the effects of stock based compensation and the award of bonuses under the Company’s
bonus plans; (10) to exclude costs incurred in connection with potential acquisitions or divestitures that are required to expensed under generally accepted accounting principles; and (11) to exclude the goodwill and intangible asset
impairment charges that are required to be recorded under generally accepted accounting principles. In addition, the Board retains the discretion to reduce or eliminate the compensation or economic benefit due upon attainment of Performance Goals
and to define the manner of calculating the Performance Criteria it selects to use for such Performance Period. Partial achievement of the specified criteria may result in the payment or vesting corresponding to the degree of achievement as
specified in the Award Agreement or the written terms of a Performance Cash Award. 
 (zz) “Performance
Period” means the period of time selected by the Board over which the attainment of one or more Performance Goals will be measured for the purpose of determining a Participant’s right to vesting or exercise of an Award. Performance
Periods may be of varying and overlapping duration, at the sole discretion of the Board. 
 (aaa) “Plan” means
this Datadog, Inc. 2019 Equity Incentive Plan. 

  
 27 

 (bbb) “Plan Administrator” means the person, persons, and/or
third-party administrator designated by the Company to administer the day to day operations of the Plan and the Company’s other equity incentive programs. 

(ccc) “Post-Termination Exercise Period” means the period following termination of a Participant’s
Continuous Service within which an Option or SAR is exercisable, as specified in Section 4(h). 
 (ddd) “Prior
Plan’s Available Reserve” means the number of shares available for the grant of new awards under the Prior Plan as of immediately prior to the Effective Date. 

(eee) “Prior Plan” means the 2012 Equity Incentive Plan. 

(fff) “Prospectus” means the document containing the Plan information specified in Section 10(a) of the
Securities Act. 
 (ggg) “Restricted Stock Award” or “RSA” means an Award of shares of
Class A Common Stock which is granted pursuant to the terms and conditions of Section 5(a). 
 (hhh) “Restricted
Stock Award Agreement” means a written agreement between the Company and a holder of a Restricted Stock Award evidencing the terms and conditions of a Restricted Stock Award grant. The Restricted Stock Award Agreement includes the Grant
Notice for the Restricted Stock Award and the agreement containing the written summary of the general terms and conditions applicable to the Restricted Stock Award and which is provided to a Participant along with the Grant Notice. Each Restricted
Stock Award Agreement will be subject to the terms and conditions of the Plan. 
 (iii) “Returning Shares”
means shares subject to outstanding stock awards granted under the Prior Plan and that following the Effective Date: (A) are not issued because such stock award or any portion thereof expires or otherwise terminates without all of the shares
covered by such stock award having been issued; (B) are not issued because such stock award or any portion thereof is settled in cash; (C) are forfeited back to or repurchased by the Company because of the failure to meet a contingency or
condition required for the vesting of such shares; (D) are withheld or reacquired to satisfy the exercise, strike or purchase price; or (E) are withheld or reacquired to satisfy a tax withholding obligation; provided, however, that any
such shares that are shares of Class B Common Stock shall instead be added to the Share Reserve as shares of Class A Common Stock as described in Section 2(a). 

(jjj) “RSU Award” or “RSU” means an Award of restricted stock units
representing the right to receive an issuance of shares of Class A Common Stock which is granted pursuant to the terms and conditions of Section 5(a). 

(kkk) “RSU Award Agreement” means a written agreement between the Company and a holder of a RSU
Award evidencing the terms and conditions of a RSU Award. The RSU Award Agreement includes the Grant Notice for the RSU Award and the agreement containing the written summary of the general terms and conditions applicable to the RSU Award and which
is provided to a Participant along with the Grant Notice. Each RSU Award Agreement will be subject to the terms and conditions of the Plan. 

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

(mmm) “Rule 405” means Rule 405 promulgated under the Securities Act. 

  
 28 

 (nnn) “Section 409A” means
Section 409A of the Code and the regulations and other guidance thereunder. 
 (ooo)
“Section 409A Change in Control” means a change in the ownership or effective control of the Company, or in the ownership of a substantial portion of the Company’s assets, as provided
in Section 409A(a)(2)(A)(v) of the Code and Treasury Regulations Section 1.409A-3(i)(5) (without regard to any alternative definition thereunder). 

(ppp) “Securities Act” means the Securities Act of 1933, as amended. 

(qqq) “Share Reserve” means the number of shares available for issuance under the Plan as set forth in
Section 2(a). 
 (rrr) “Stock Appreciation Right” or “SAR” means a
right to receive the appreciation on Class A Common Stock that is granted pursuant to the terms and conditions of Section 4. 

(sss) “SAR Agreement” means a written agreement between the Company and a holder of a SAR evidencing the terms
and conditions of a SAR grant. The SAR Agreement includes the Grant Notice for the SAR and the agreement containing the written summary of the general terms and conditions applicable to the SAR and which is provided to a Participant along with the
Grant Notice. Each SAR Agreement will be subject to the terms and conditions of the Plan. 
 (ttt)
“Subsidiary” means, with respect to the Company, (i) any corporation of which more than 50% of the outstanding Capital Stock having ordinary voting power to elect a majority of the board of directors of such
corporation (irrespective of whether, at the time, stock of any other class or classes of such corporation will have or might have voting power by reason of the happening of any contingency) is at the time, directly or indirectly, Owned by the
Company, and (ii) any partnership, limited liability company or other entity in which the Company has a direct or indirect interest (whether in the form of voting or participation in profits or capital contribution) of more than 50%. 

(uuu) “Ten Percent Stockholder” means a person who Owns (or is deemed to Own pursuant to Section 424(d) of
the Code) stock possessing more than 10% of the total combined voting power of all classes of stock of the Company or any Affiliate. 

(vvv) “Trading Policy” means the Company’s policy permitting certain individuals to sell Company shares
only during certain “window” periods and/or otherwise restricts the ability of certain individuals to transfer or encumber Company shares, as in effect from time to time. 

(www) “Unvested Non-Exempt Award” means the portion of any Non-Exempt Award that had not vested in accordance with its terms upon or prior to the date of any Corporate Transaction. 

(xxx) “Vested Non-Exempt Award” means the portion of any Non-Exempt Award that had vested in accordance with its terms upon or prior to the date of a Corporate Transaction. 

  
 29 

 DATADOG, INC. 

STOCK OPTION GRANT NOTICE 

(2019 EQUITY INCENTIVE PLAN) 

Datadog, Inc. (the “Company”), pursuant to its 2019 Equity Incentive Plan (the “Plan”), has granted to you
(“Optionholder”) an option to purchase the number of shares of the Class A Common Stock set forth below (the “Option”). Your Option is subject to all of the terms and conditions as set forth
herein and in the Plan, and the Global Stock Option Agreement, including any additional terms and conditions for your country included in the appendix attached thereto, and the Notice of Exercise, all of which are attached hereto and incorporated
herein in their entirety. Capitalized terms not explicitly defined herein but defined in the Plan or the Global Stock Option Agreement shall have the meanings set forth in the Plan or the Global Stock Option Agreement, as applicable. 

 

									
		 	Optionholder:	 		 	  
	 	
		 	Date of Grant:	 		 		 	
		 	Vesting Commencement Date:	 		 	  
	 	
		 	Number of Shares of Class A Common Stock	 		 	  
	 	
		 	Subject to Option:	 		 	  
	 	
		 	Exercise Price (Per Share):	 		 	  
	 	
		 	Total Exercise Price:	 		 	  
	 	
		 	Expiration Date:	 		 	  
	 	

 Type of Grant: [Incentive Stock Option] OR [Nonstatutory Stock Option] 

Exercise and Vesting Schedule: Subject to the Optionholder’s Continuous Service through each applicable vesting date, the Option will vest as
follows: 

[                      
                  ] 
 Optionholder
Acknowledgements: By your signature below or by electronic acceptance or authentication in a form authorized by the Company, you understand and agree that: 
  

	 	•	 	 The Option is governed by this Stock Option Grant Notice, and the provisions of the Plan and the Global Stock
Option Agreement and the Notice of Exercise, all of which are made a part of this document. Unless otherwise provided in the Plan, this Grant Notice and the Global Stock Option Agreement (together, the “Option Agreement”) may
not be modified, amended or revised except in a writing signed by you and a duly authorized officer of the Company. 

  

	 	•	 	 If the Option is an Incentive Stock Option, it (plus other outstanding Incentive Stock Options granted to you)
cannot be first exercisable for more than $100,000 in value (measured by exercise price) in any calendar year. Any excess over $100,000 is a Nonstatutory Stock Option. 

 

	 	•	 	 You consent to receive this Grant Notice, the Global Stock Option Agreement, the Plan, the Prospectus and any
other Plan-related documents by electronic delivery and to participate in the Plan through an on-line or electronic system established and maintained by the Company or another third party designated by the
Company. 

  

	 	•	 	 You have read and are familiar with the provisions of the Plan, the Global Stock Option Agreement, the Notice of
Exercise and the Prospectus. In the event of any conflict between the provisions in this Grant Notice, the Option Agreement, the Notice of Exercise, or the Prospectus and the terms of the Plan, the terms of the Plan shall control.

	 	•	 	 The Option Agreement sets forth the entire understanding between you and the Company regarding the acquisition of
Class A Common Stock and supersedes all prior oral and written agreements, promises and/or representations on that subject with the exception of other equity awards previously granted to you and any written employment agreement, offer letter,
severance agreement, written severance plan or policy, or other written agreement between the Company and you in each case that specifies the terms that should govern this Option. 

 

	 	•	 	 Counterparts may be delivered via facsimile, electronic mail (including pdf or any electronic signature complying
with the U.S. federal ESIGN Act of 2000, Uniform Electronic Transactions Act or other applicable law) or other transmission method and any counterpart so delivered will be deemed to have been duly and validly delivered and be valid and effective for
all purposes. 

  

					
	DATADOG, INC.	  		  	OPTIONHOLDER:
			
	By:                                     
                                         
                  	  		  	                                      
                                         
                                 
	Signature	  		  	Signature
	Title:                                     
                                         
              	  		  	Date:                                     
                                         
                          
	Date:                                     
                                         
              	  		  	

  

 DATADOG, INC. 

2019 EQUITY INCENTIVE PLAN 

GLOBAL STOCK OPTION AGREEMENT 

As reflected by your Stock Option Grant Notice (“Grant Notice”) Datadog, Inc. (the “Company”)
has granted you an option under its 2019 Equity Incentive Plan (the “Plan”) to purchase a number of shares of Class A Common Stock at the exercise price indicated in your Grant Notice (the
“Option”). Capitalized terms not explicitly defined in this Agreement but defined in the Grant Notice or the Plan shall have the meanings set forth in the Grant Notice or Plan, as applicable. The terms of your Option as
specified in the Grant Notice and this Global Stock Option Agreement, including any additional terms and conditions for your country included in the appendix attached hereto, constitute your Option Agreement. 

The general terms and conditions applicable to your Option are as follows: 

1. GOVERNING PLAN DOCUMENT. Your Option is subject to all the provisions of the
Plan. Your Option is further subject to all interpretations, amendments, rules and regulations, which may from time to time be promulgated and adopted pursuant to the Plan. In the event of any conflict between the Option Agreement and the provisions
of the Plan, the provisions of the Plan shall control. 
 2. EXERCISE. 

(a) You may generally exercise the vested portion of your Option for whole shares of Class A Common Stock at any time during its
term by delivery of payment of the exercise price and applicable withholding taxes and other required documentation to the Plan Administrator in accordance with the exercise procedures established by the Plan Administrator, which may include an
electronic submission. Please review the Plan, which may restrict or prohibit your ability to exercise your Option during certain periods. 

(b) To the extent permitted by Applicable Law, you may pay your Option exercise price as follows: 

(i) cash, check, bank draft or money order; 

(ii) subject to Company and/or Committee consent at the time of exercise, pursuant to a “cashless exercise” program as
further described in the Plan if at the time of exercise the Class A Common Stock is publicly traded; 
 (iii) subject to
Company and/or Committee consent at the time of exercise, by delivery of previously owned shares of Class A Common Stock as further described in the Plan; or 

(iv) subject to Company and/or Committee consent at the time of exercise, if the Option is a Nonstatutory Stock Option, by a “net
exercise” arrangement as further described in the Plan. 
 3. TERM. You may not exercise your Option before
the commencement of its term or after its term expires. The term of your option commences on the Date of Grant and expires upon the earliest of the following: 

(a) immediately upon the termination of your Continuous Service for Cause; 

  
 1 

 (b) three months after the termination of your Continuous Service for any reason
other than Cause, Disability or death; 
 (c) 12 months after the termination of your Continuous Service due to your Disability; 

(d) 18 months after your death if you die during your Continuous Service; 

(e) immediately upon a Corporate Transaction if the Board has determined that the Option will terminate in connection with a Corporate
Transaction, 
 (f) the Expiration Date indicated in your Grant Notice; or 

(g) the day before the 10th anniversary of the Date of Grant. 

Notwithstanding the foregoing, if you die during the period provided in Section 3(b) or 3(c) above, the term of your Option shall not
expire until the earlier of (i) eighteen months after your death, (ii) upon any termination of the Option in connection with a Corporate Transaction, (iii) the Expiration Date indicated in your Grant Notice, or (iv) the day
before the tenth anniversary of the Date of Grant. Additionally, the Post-Termination Exercise Period of your Option may be extended as provided in the Plan. 

To obtain the federal income tax advantages associated with an Incentive Stock Option, the Code requires that at all times beginning on the
date of grant of your Option and ending on the day three months before the date of your Option’s exercise, you must be an employee of the Company or an Affiliate, except in the event of your death or Disability. If the Company provides for the
extended exercisability of your Option under certain circumstances for your benefit, your Option will not necessarily be treated as an Incentive Stock Option if you exercise your Option more than three months after the date your employment
terminates. 
 4. WITHHOLDING OBLIGATIONS. 

(a) You acknowledge that, regardless of any action taken by the Company, or if different, the Affiliate employing you (the
“Employer”), the ultimate liability for all income tax (including U.S. federal, state, and local taxes and/or non-U.S. taxes), social insurance, payroll tax, fringe benefits tax,
payment on account or other tax-related items related to your participation in the Plan and legally applicable to you (“Tax-Related Items”) is
and remains your responsibility and may exceed the amount, if any, actually withheld by the Company or the Employer. You further acknowledge that the Company and/or the Employer (i) make no representations or undertakings regarding the
treatment of any Tax-Related Items in connection with any aspect of the Option, including the grant of the Option, the vesting of the Option, the exercise of the Option, the subsequent sale of any shares of
Class A Common Stock acquired pursuant to the Option and the receipt of any dividends; and (ii) do not commit to and are under no obligation to reduce or eliminate your liability for Tax-Related
Items. Further, if you become subject to taxation in more than one country, you acknowledge that the Company and/or the Employer (or former employer, as applicable) may be required to withhold or account for
Tax-Related Items in more than one country. 
 (b) Prior to any relevant taxable or tax
withholding event, as applicable, you agree to make adequate arrangements satisfactory to the Company and/or the Employer to satisfy all Tax-Related Items. In this regard, you authorize the Company and/or the
Employer, or their respective agents, at their discretion, to satisfy any applicable withholding obligations with regard to all Tax-Related Items by one 

  
 2 

 
or a combination of the following: (i) withholding from your wages or other cash compensation paid to you by the Company and/or the Employer; (ii) allowing or requiring you to make a
cash payment to cover the Tax-Related Items; (iii) withholding from proceeds of the sale of shares of Class A Common Stock acquired upon exercise of this Option either through a voluntary sale or
through a mandatory sale arranged by the Company (on your behalf pursuant to this authorization without further consent); (iv) withholding from the shares of Class A Common Stock to be issued to you upon exercise of this Option; or (v) any other method of withholding determined by the Company and permitted by applicable law; provided, however, that that if you are a Section 16 officer of the Company under the
Exchange Act, then the Administrator shall establish the method of withholding from alternatives (i)-(iv) herein and, if the Administrator does not exercise its discretion prior to the applicable withholding event, then you shall be entitled
to elect the method of withholding from the alternatives above. 
 (c) The Company and/or the Employer may withhold or account for Tax-Related Items by considering applicable statutory withholding amounts or other applicable withholding rates, including maximum rates applicable in your jurisdiction, in which case you may receive a refund of any
over-withheld amount in cash and will have no entitlement to the equivalent amount in shares of Class A Common Stock. If the obligation for Tax-Related Items is satisfied by withholding in shares of
Class A Common Stock, for tax purposes, you are deemed to have been issued the full number of shares of Class A Common Stock subject to the exercised Option, notwithstanding that a number of the shares of Class A Common Stock is held
back solely for the purpose of paying the Tax-Related Items. 
 (d) You agree to pay to the
Company or the Employer any amount of Tax-Related Items that the Company or the Employer may be required to withhold or account for as a result of your participation in the Plan that cannot be satisfied by the
means previously described. The Company may refuse to issue or deliver the shares of Class A Common Stock, or the proceeds of the sale of shares of Class A Common Stock, if you fail to comply with your obligations in connection with the Tax-Related Items. 
 5. INCENTIVE STOCK OPTION
DISPOSITION REQUIREMENT. If your Option is an Incentive Stock Option, you must notify the Company in writing within 15 days after the date of any disposition of any of the shares of the Class A Common Stock
issued upon exercise of your Option that occurs within two years after the date of your Option grant or within one year after such shares of Class A Common Stock are transferred upon exercise of your Option. 

6. NATURE OF GRANT. In accepting the Option, you acknowledge, understand and agree
that: 
 (a) the Plan is established voluntarily by the Company, it is discretionary in nature, and may be amended, suspended or
terminated by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant of the Option is exceptional, 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; 

(c) all decisions with respect to future Options or other grants, if any, will be at the sole discretion of the Company; 

(d) the Option grant and your participation in the Plan shall not create a right to employment or be interpreted as forming or amending
an employment or service contract with the Company, the Employer or any Affiliate; 

  
 3 

 (e) you are voluntarily participating in the Plan; 

(f) the Option and any shares of Class A Common Stock acquired under the Plan, and the income from and value of same, are not
intended to replace any pension rights or compensation; 
 (g) the Option and any shares of Class A Common Stock acquired under
the Plan, and the income from and value of same, are not part of normal or expected compensation for any purpose, including, without limitation, calculating any severance, resignation, termination, redundancy, dismissal, end-of-service payments, holiday pay, bonuses, long-service awards, pension or retirement or welfare benefits or similar mandatory payments; 

(h) the future value of the shares of Class A Common Stock underlying the Option is unknown, indeterminable, and cannot be
predicted with certainty; 
 (i) if the underlying shares of Class A Common Stock do not increase in value, the Option will have
no value; 
 (j) if you exercise the Option and acquire shares of Class A Common Stock, the value of such shares of Class A
Common Stock may increase or decrease in value, even below the exercise price; 
 (k) for purposes of the Option, your Continuous
Service will be considered terminated as of the date you are no longer actively providing services to the Company or one of its Affiliates (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 you are employed or the terms of your employment agreement, if any), and unless otherwise expressly provided in the Option Agreement or determined by the Company, (i) your right to vest in the Option
under the Plan, if any, and (ii) the period (if any) during which you may exercise the Option after such termination of Continuous Service will terminate as of such date and in each instance will not be extended by any notice period or any
period of “garden leave” or similar period mandated under employment laws in the jurisdiction where you are employed or the terms of your employment agreement, if any); and the Board shall have the exclusive discretion to determine when
you are no longer actively providing services for purposes of the Option (including whether you may still be considered to be providing services while on a leave of absence); 

(l) no claim or entitlement to compensation or damages shall arise from forfeiture of the Option resulting from your termination of
Continuous Service (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where you are employed, or the terms of your employment agreement, if any); 

(m) unless otherwise agreed with the Company in writing, the Option and any shares of Class A Common Stock acquired under the Plan,
and the income from and value of same, are not granted as consideration for, or in connection with, any service you may provide as a director of the Company or any Affiliate; and 

(n) neither the Company, the Employer or any Affiliate shall be liable for any foreign exchange rate fluctuation between your local
currency and the United States Dollar that may affect the value of the Option or of any amounts due to you pursuant to the exercise of the Option or the subsequent sale of any shares of Class A Common Stock acquired upon exercise. 

  
 4 

 7. TRANSFERABILITY. Except as otherwise provided in the Plan,
your Option is not transferable, except by will or by the applicable laws of descent and distribution, and is exercisable during your life only by you. 

8. CORPORATE TRANSACTION. Your Option is subject to the terms of any agreement governing a
Corporate Transaction involving the Company, including, without limitation, a provision for the appointment of a stockholder representative that is authorized to act on your behalf with respect to any escrow, indemnities and any contingent
consideration. 
 9. NO LIABILITY FOR TAXES. As a
condition to accepting the Option, you hereby (a) agree to not make any claim against the Company, or any of its Officers, Directors, Employees or Affiliates related to tax liabilities arising from the Option or other Company compensation and
(b) acknowledge that you were advised to consult with your own personal tax, financial and other legal advisors regarding the tax consequences of the Option and have either done so or knowingly and voluntarily declined to do so. Additionally,
you acknowledge that the Option is exempt from Section 409A for U.S. tax purposes, only if the exercise price is at least equal to the “fair market value” of the Class A Common Stock on the date of grant as determined by the U.S.
Internal Revenue Service and there is no other impermissible deferral of compensation associated with the Option. Additionally, as a condition to accepting the Option, you agree not make any claim against the Company, or any of its Officers,
Directors, Employees or Affiliates in the event that the U.S. Internal Revenue Service asserts that such exercise is less than the “fair market value” of the Class A Common Stock on the date of grant as subsequently determined by the
Internal Revenue Service. 
 10. SEVERABILITY. If any part of this Option Agreement or the Plan
is declared by any court or governmental authority to be unlawful or invalid, such unlawfulness or invalidity will not invalidate any portion of this Option Agreement or the Plan not declared to be unlawful or invalid. Any Section of this
Option Agreement (or part of such a Section) so declared to be unlawful or invalid will, if possible, be construed in a manner which will give effect to the terms of such Section or part of a Section to the fullest extent possible while remaining
lawful and valid. 
 11. WAIVER. You acknowledge that a waiver by the Company of a breach of any provision
of this Option Agreement shall not operate or be construed as a waiver of any other provision of this Option Agreement, or of any subsequent breach of this Option Agreement. 

12. NO ADVICE REGARDING GRANT. The Company is not providing any
tax, legal or financial advice, nor is the Company making any recommendations regarding your participation in the Plan, or your acquisition or sale of the underlying shares of Class A Common Stock. You should consult with your own personal tax,
legal and financial advisors regarding your participation in the Plan before taking any action related to the Plan. 
 13.
DATA PRIVACY. By signing the Grant Notice or otherwise accepting this Option Agreement in accordance with the Company’s acceptance procedures, you acknowledge that, in order for the Company to administer
the grant of the Option and any future participation in the Plan, the Company and the Employer must collect, process and transfer certain of your personal data, subject to the GDPR privacy policy for employees, workers and contractors (Europe). 

14. LANGUAGE. You acknowledge that you are sufficiently proficient in the English language, or have consulted
with an advisor who is sufficiently proficient in English, so as to allow you to understand the terms and conditions of this Option Agreement. If you have received this Option Agreement or any other documents 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. 

  
 5 

 15. GOVERNING LAW/VENUE. The
Option Agreement and any controversy arising out of or relating to the Option Agreement shall be governed by, and construed in accordance with, the internal laws of the State of Delaware, without regard to conflict of law principles that would
result in any application of any law other than the law of the State of Delaware. For purposes of any action, lawsuit or other proceeding brought to enforce the Option Agreement, relating to it, or arising from it, the parties hereby submit to and
consent to the sole and exclusive jurisdiction of the courts of New York County, New York, or the federal courts for the United States for the Southern District of New York, and no other courts where this grant is made and/or to be performed. 

16. INSIDER TRADING RESTRICTIONS / MARKET ABUSE
LAW. You may be subject to insider trading restrictions and/or market abuse laws based on the exchange on which the shares of Class A Common Stock are listed and in applicable jurisdictions, including the United States,
your country and the designated broker’s country, which may affect your ability to accept, acquire, sell or otherwise dispose of shares of Class A Common Stock, rights to shares of Class A Common Stock (i.e., Options) or rights
linked to the value of the shares of Class A Common Stock under the Plan during such times as you are considered to have “inside information” regarding the Company (as defined by the laws in the applicable jurisdiction(s)). Local
insider trading laws and regulations may prohibit the cancellation or amendment of orders you placed before you possessed inside information. Furthermore, you could be prohibited from (i) disclosing the inside information to any third party,
which may include fellow employees and (ii) “tipping” third parties or causing them otherwise to buy or sell securities. Any restrictions under these laws or regulations are separate from and in addition to any restrictions that may be
imposed under the Company’s insider trading policy, or any other applicable insider trading policy then in effect. You acknowledge that you are responsible for complying with any applicable restrictions and are encouraged to speak with your
personal legal advisor for further details regarding any applicable insider-trading and/or market-abuse laws in your country. 
 17.
FOREIGN ASSET/ACCOUNT, EXCHANGE CONTROL AND TAX REPORTING. You may be subject to foreign asset/account, exchange
control and/or tax reporting requirements as a result of the acquisition, holding and/or transfer of shares of Class A Common Stock or cash (including dividends and the proceeds arising from the sale of shares of Class A Common Stock)
derived from your participation in the Plan in, to and/or from a brokerage/bank account or legal entity located outside your country. The Applicable Laws in your country may require that you report such accounts, assets and balances therein, the
value thereof and/or the transactions related thereto to the applicable authorities in such country. You may also be required to repatriate sale proceeds or other funds received as a result of your participation in the Plan to your country through a
designated bank or broker within a certain time after receipt. You acknowledge that it is your responsibility to be compliant with such regulations and you are encouraged to consult with your personal legal advisor for any details. 

18. COUNTRY-SPECIFIC PROVISIONS. Notwithstanding any provisions of the Option
Agreement to the contrary, the Option shall be subject to any terms and conditions for your country of residence (and country of employment, if different) set forth in the appendix attached hereto (the “Appendix”). Further,
if you transfer residence and/or employment to another country reflected in the Appendix, the terms and conditions for such country will apply to you to the extent the Company determines, in its sole discretion, that the application of such terms
and conditions is necessary or advisable for legal or administrative reasons. The Appendix constitutes part of the Option Agreement. 

  
 6 

 19. IMPOSITION OF OTHER
REQUIREMENTS. The Company reserves the right to impose other requirements on your participation in the Plan, on the Option and on any shares of Class A Common Stock acquired under the Plan, to the extent the Company
determines it is necessary or advisable for legal or administrative reasons, and to require you to sign any additional agreements or undertakings that may be necessary to accomplish the foregoing. 

20. OTHER DOCUMENTS. You hereby acknowledge receipt of or the right to receive a document
providing the information required by Rule 428(b)(1) promulgated under the Securities Act, which includes the Prospectus. In addition, you acknowledge receipt of the Company’s Trading Policy. 

21. QUESTIONS. If you have questions regarding these or any other terms and conditions applicable to your Option,
including a summary of the applicable federal income tax consequences please see the Prospectus. 
 * * * * 

  
 7 

 APPENDIX 

TO THE 
 DATADOG, INC.

 2019 EQUITY INCENTIVE PLAN 

GLOBAL STOCK OPTION AGREEMENT 
 Capitalized
terms used but not defined in this Appendix have the meanings set forth in the Plan, the Grant Notice and/or the Global Stock Option Agreement. 

Terms and Conditions 
 This Appendix includes
additional terms and conditions that govern the Option granted to you under the Plan if you are an employee that works or resides outside the U.S. and/or in one of the countries listed below. If you are a citizen or resident of a country other than
the one in which you are currently working and/or residing, transfer employment and/or residency to another country after the date of grant, are a consultant, change employment status to a consultant position, or are considered a resident of another
country for local law purposes, the Company shall, in its discretion, determine the extent to which the special terms and conditions contained herein shall be applicable to you. References to your Employer shall include any entity that engages your
services. 
 Notifications 
 This Appendix also
includes information regarding exchange controls and certain other issues of which you should be aware with respect to your participation in the Plan. The information is provided solely for your convenience and is based on the securities, exchange
control and other laws in effect in the respective countries as of September 2019. Such laws are often complex and change frequently. As a result, the Company strongly recommends that you not rely on the information noted herein as the only source
of information relating to the consequences of your participation in the Plan because the information may be out of date by the time you vest in or exercise the Option or sell any shares of Class A Common Stock acquired upon exercise. 

In addition, the information contained in this Appendix is general in nature and may not apply to your particular situation, and the Company is not in a
position to assure you of any particular result. Accordingly, you should seek appropriate professional advice as to how the applicable laws in your country may apply to your situation. 

Finally, if you are a citizen or resident of a country other than the one in which you are currently residing and/or working, transfer to another country
after the date of grant, or are considered a resident of another country for local law purposes, the notifications contained herein may not be applicable to you in the same manner. 

  
 A-1 

 AUSTRALIA 

Notifications 
 Tax Conditions.
Subdivision 83A-C of the Income Tax Assessment Act 1997 (Cth) applies to the Option granted under the Plan, such that the Option is intended to be subject to deferred taxation. 

Securities Law Information. If you acquire shares of Class A Common Stock under the Plan and offer such shares of Class A Common Stock
for sale to a person or entity resident in Australia, the offer may be subject to disclosure requirements under Australian law. You should obtain legal advice regarding your disclosure obligations prior to making any such offer. 

Exchange Control Information. If you are an Australian resident, exchange control reporting is required for cash transactions exceeding
AUD10,000 and international fund transfers. If an Australian bank is assisting with the transaction, the bank will file the report on your behalf. If there is no Australian bank involved with the transfer, you will be required to file the report.

 AUSTRIA 
 Notifications 

Exchange Control Information. If you hold shares of Class A Common Stock acquired under the Plan outside of Austria, you must submit
a report to the Austrian National Bank as follows: (i) on a quarterly basis if the value of the shares of Class A Common Stock as of any given quarter meets or exceeds €30,000,000; the deadline for filing the quarterly report is the
15th day of the month following the end of the respective quarter and (ii) on an annual basis if the value of the shares of Class A Common Stock as of December 31 meets or exceeds €5,000,000; the deadline for filing the quarterly
report is the 15th day of the month following quarter-end and for filing the annual report is January 31 of the following year. 

When you sell shares of Class A Common Stock acquired under the Plan (or receive a cash dividend) you may be required to comply with certain exchange
control obligations if the cash proceeds from the sale are held outside of Austria. If the transaction volume of all cash accounts abroad exceeds €10,000,000, the movements and balances of all accounts must be reported monthly, as of the last
day of the month, on or before the fifteenth day of the following month. 
 BRAZIL 

Terms and Conditions 
 Nature of
Grant. The following provision supplements Section 6 of the Global Stock Option Agreement: 
 You acknowledge that you have read and
specifically and expressly approve of Sections 6(a) and 6(g) of the Global Stock Option Agreement. You understand that the Option is granted to you by the Company and does not constitute part of your normal compensation or salary. You further
understand that the Option was granted by the Company as a one-time benefit.     

Compliance with Law. By accepting the Option, you acknowledge that you agree to comply with applicable Brazilian laws and to pay any and
all applicable taxes associated with your participation in the Plan. 

  
 A-2 

 Notifications 

Exchange Control Information. If you hold assets and rights outside Brazil with an aggregate value exceeding USD 100,000, you will be
required to prepare and submit to the Central Bank of Brazil an annual declaration of such assets and rights, including: (i) bank deposits; (ii) loans; (iii) financing transactions; (iv) leases; (v) direct investments;
(vi) portfolio investments, including shares of Common Stock acquired under the Plan; (vii) financial derivatives investments; and (viii) other investments, including real estate and other assets. Please note that foreign individuals
holding Brazilian visas are considered Brazilian residents for purposes of this reporting requirement and must declare at least the assets held abroad that were acquired subsequent to the date of admittance as a resident of Brazil. Individuals
holding assets and rights outside Brazil valued at less than USD 100,000 are not required to submit a declaration. Individuals holding assets and rights outside Brazil valued at more than USD 100,000,000 are required to submit a quarterly
declaration. 
 CANADA 
 Terms and
Conditions 
 Method of Exercise. Due to regulatory considerations in Canada, you are prohibited from surrendering shares of
Class A Common Stock that you already own or attesting to the ownership of shares of Class A Common Stock or utilizing a “net exercise” procedure to pay the exercise price or any
Tax-Related Items in connection with the Option. The Company reserves the right to permit these methods of payment depending on the development of local law. 

Termination. The following provision replaces Section 6(k) of the Global Stock Option Agreement in its entirety: 

(k) In the event of the termination of your Continuous Service (whether or not later found to be invalid or in breach of employment laws in
the jurisdiction where you are employed or the terms of your employment agreement, if any), unless otherwise provided in the Global Stock Option Agreement or determined by the Company, your right to vest in the Option under the Plan will terminate
effective as of the earlier of (i) the date upon which you cease to provide services, or (b) the date upon which you receive a notice of termination, and the period (if any) during which you may exercise the Option after such termination
of Continuous Service will commence on the same date and will not in either case be extended by any contractual notice period in which you do not actively provide services or any period of pay in lieu of such notice (including, but not limited to
Canadian statutory law, regulatory law and/or common law) mandated under employment laws in the jurisdiction where you are employed or the terms of your employment agreement, if any; the Board shall have the exclusive discretion to determine when
you are no longer actively providing services for purposes of the Option (including whether you may still be considered to be providing services while on a leave of absence); 

The following terms and conditions apply to employees resident in Quebec: 

Language. The parties acknowledge that it is their express wish that this agreement, as well as all documents, notices and legal proceedings
entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. 
 Les parties reconnaissent avoir
exigé la rédaction en anglais de cette convention, ainsi que de tous documents, avis et procédures judiciaires, exécutés, donnés ou intentés en vertu de, ou liés directement ou indirectement
à, la présente convention. 

  
 A-3 

 Data Privacy. This provision supplements Section 13 of the Global Stock Option
Agreement: 
 You hereby authorize the Company or any Affiliate, including the Employer, and any agents or representatives to (i) discuss with and
obtain all relevant information from all personnel, professional or non-professional, involved in the administration and operation of the Plan, and (ii) disclose and discuss any and all information
relevant to the Plan with their advisors. You further authorize the Company or any Affiliate, including the Employer, and any agents or representatives to record such information and to keep such information in your employee file. 

Notifications 
 Securities Law
Information. You are permitted to sell shares of Class A Common Stock acquired under the Plan through the designated broker appointed under the Plan, if any, provided the resale of shares of Class A Common Stock acquired
under the Plan takes place outside Canada through the facilities of the exchange on which the shares of Class A Common Stock are then listed. 

Foreign Asset/Account Reporting Information. Canadian residents are required to report any foreign specified property held outside Canada
(including Options and shares of Class A Common Stock acquired under the Plan) annually on form T1135 (Foreign Income Verification Statement) if the total cost of the foreign specified property exceeds CAD 100,000 at any time during the year.
Thus, if the CAD 100,000 cost threshold is exceeded by other foreign specified property held by the individual, Options must be reported (generally at a nil cost). For purposes of such reporting, shares of Class A Common Stock acquired under
the Plan may be reported at their adjusted cost basis. The adjusted cost basis of a share is generally equal to the fair market value of such share at the time of acquisition; however, if you own other shares of Class A Common Stock
(e.g., acquired under other circumstances or at another time), the adjusted cost basis may have to be averaged with the adjusted cost bases of the other shares of Class A Common Stock. You should consult with your personal legal
advisor to ensure compliance with applicable reporting obligations. 
 CZECH REPUBLIC 

There are no country-specific provisions. 
 DENMARK

 Terms and Conditions 
 Stock
Option Act. You acknowledge that you received the Employer Statement in Danish which sets forth additional terms of the Option to the extent the Danish Stock Options Act applies. 

Notifications 
 Foreign Asset / Account
Reporting Notification. If you establish an account holding cash or shares of Class A Common Stock outside Denmark, you must report the account to the Danish Tax Administration. The form may be obtained from a local bank. 

  
 A-4 

 FRANCE 

Terms and Conditions 
 Language
Consent. By accepting the Option, you confirm having read and understood the documents related to the Option (the Plan and the Option Agreement) which were provided in the English language. You accept the terms of these documents
accordingly. 
 Consentement à la Langue Utilisée. En acceptant l’Option, vous confirmez avoir lu et compris les documents
relatifs à l’Option (le Plan et le Contrat d’Attribution d’Options) qui ont été remis en anglais. Vous acceptez les termes de ces documents en connaissance de cause. 

Notifications 
 Tax Information. This
Option is not intended to qualify for specific tax and social security treatment applicable to stock options granted under Section L. 225-177 to L. 225-186-1 of the French Commercial Code, as amended. 
 Foreign Asset/Account Reporting Information.
If you hold cash or shares of Class A Common Stock outside of France or maintain a foreign bank or brokerage account (including accounts that were opened and closed during the tax year), you are required to report such assets and accounts to
the French tax authorities on an annual basis on a specified form, together with your income tax return. Failure to complete this reporting can trigger significant penalties. 

GERMANY 
 Notifications 

Exchange Control Information. Cross-border payments in excess of EUR 12,500 must be reported monthly to the German Federal Bank
(Bundesbank). If you receive a payment in excess of EUR 12,500 in connection with the sale of shares of Class A Common Stock acquired under the Plan or the receipt of any cash dividends, the report must be filed electronically by the
fifth day of the month following the month in which the payment was received. The form of report (Allgemeines Meldeportal Statistik) can be accessed via the Bundesbank’s website (www.bundesbank.de) and is available in both German and
English. 
 Foreign Asset/Account Reporting Information. German residents holding shares of Class A Common Stock must notify their local
tax office of the acquisition of shares of Class A Common Stock when they file their returns for the relevant year if the value of the shares of Class A Common Stock exceeds EUR 150,000 or in the unlikely event that the resident holds
shares of Class A Common Stock exceeding 10% of the Company’s share capital. 
 INDIA 

Terms and Conditions 
 Method of
Exercise. The following provision supplements Section 2 of the Global Stock Option Agreement: 
 Due to legal restrictions in India, you
may not exercise the Option using a cashless sell-to-cover exercise, whereby you direct a broker or transfer agent to sell some (but not all) of the shares of
Class A Common Stock subject to the exercised Option and deliver to the Company the amount of the sale proceeds to pay the exercise price and any Tax-Related Items. However, subject to approval by the
Company, payment of the exercise price may be made by any of the other methods of payment set forth in the Global Stock Option Agreement. The Company reserves the right to provide you with this method of payment depending on the development of local
law. 

  
 A-5 

 Notifications 

Exchange Control Information. If you remit funds outside of India to exercise the Option, it is your responsibility to comply with any
applicable exchange control regulations in India. In particular, it is your obligation to determine whether approval from the Reserve Bank of India is required prior to exercise or whether you have exhausted the investment limit of USD250,000 for
the relevant fiscal year. Further, Indian residents are required to repatriate the proceeds from the sale of shares of Class A Common Stock to India within specified timeframes. You must retain the foreign inward remittance certificate received
from the bank where the foreign currency is deposited in the event that the Reserve Bank of India or the Employer requests proof of repatriation. It is your responsibility to comply with these requirements. Neither the Company nor the Employer will
be liable for any fines or penalties resulting from your failure to comply with any Applicable Laws. 
 Foreign Asset/Account Reporting
Information. Indian residents are required to declare any foreign bank accounts and any foreign financial assets (including shares of Class A Common Stock held outside of India) in their annual tax returns. You are responsible for
complying with this reporting obligation and should confer with your personal tax advisor to determine your obligations in this regard. 
 IRELAND

 There are no country-specific provisions. 

ITALY 
 Terms and Conditions 

Stock Option Exercises. Due to regulatory requirements, notwithstanding Section 12 of the Option Agreement, you will be
required to exercise the option using a cashless sell-all exercise method, pursuant to which all shares of Class A common stock subject to the exercised option will be sold immediately upon exercise and
the proceeds of sale, less the exercise price, any Tax-Related Items and broker’s fees or commissions, will be remitted to you in cash in accordance with any applicable exchange control laws and
regulations. You will not be permitted to hold shares after exercise. The Company reserves the right to provide additional methods of exercise depending on the development of local laws. 

Plan Acknowledgement. You acknowledge that you have read and specifically and expressly approve the following sections of the Global
Stock Option Agreement: (4) Withholding Obligations; (6) Nature of Grant; (9) No Liability for Taxes; (10) Severability; (11) Waiver; (13) Data Privacy; (14) Language; (15) Venue; and (19) Imposition of Other
Requirements;; and the Italy country-specific terms and conditions of this Appendix. 
 Notifications 

Foreign Asset/Account Reporting Information. If you are an Italian resident and, during any fiscal year, hold investments or financial assets
outside of Italy (e.g., cash, shares of Class A Common Stock) which may generate income taxable in Italy (or if you are the beneficial owner of such an investment or asset even if you do not directly hold the investment or asset), you
are required to report such investments or assets on your annual tax return for such fiscal year (on UNICO Form, RW Schedule, or on a special form if you are not required to file a tax return). 

  
 A-6 

 Foreign Financial Assets Tax. The fair market value of any shares of Common Stock held outside
of Italy is subject to a foreign assets tax. Financial assets include shares of Class A Common Stock acquired under the Plan. The taxable amount will be the fair market value of the financial assets assessed at the end of the calendar year. You
should consult with your personal tax advisor about the foreign financial assets tax. 
 JAPAN 

Notifications 
 Exchange Control
Information. Japanese residents acquiring shares of Class A Common Stock valued at more than JPY 100,000,000 in a single transaction must file a Securities Acquisition Report with the Ministry of Finance (“MOF”)
through the Bank of Japan within twenty (20) days of the exercise of any Option. 
 In addition, Japanese residents paying more than JPY 30,000,000 in
a single transaction for the shares of Class A Common Stock at any exercise of the Option must file a Payment Report with the MOF through the Bank of Japan. The precise reporting requirements vary depending on whether the relevant payment is
made through a bank in Japan. 
 A Payment Report is required independently of a Securities Acquisition Report. Consequently, if the total amount that a
Japanese resident pays on a one-time basis at exercise of the Option exceeds JPY 100,000,000, such resident must file both a Payment Report and a Securities Acquisition Report. 

Foreign Asset/Account Reporting Information. Japanese residents are required to report details of any assets held outside Japan as of December
31st (including shares of Class A Common Stock acquired under the Plan), to the extent such assets have a total net fair market value exceeding JPY 50,000,000. Such report is due by March 15th each year. You should consult your personal
legal advisor to ensure compliance with applicable reporting obligations. 
 NETHERLANDS 

There are no country-specific provisions. 
 NEW ZEALAND

 Terms and Conditions 
 Securities Law
Information. 
 Warning 
 You are being offered
the Option which, if vested, will entitle you to acquire shares of Class A Common Stock. Shares of Class A Common Stock give you a stake in the ownership of the Company. You may receive a return if dividends are paid. Shares of
Class A Common Stock are quoted on the Nasdaq. This means you may be able to sell them on the Nasdaq if there are interested buyers. You may get less than invested. The price will depend on the demand for the shares of Class A Common
Stock. 
 If the Company runs into financial difficulties and is wound up, you will be paid only after all creditors have been paid. You may lose some or
all of your investment. 

  
 A-7 

 New Zealand law normally requires people who offer financial products to give information to investors
before they invest. This information is designed to help investors to make an informed decision. 
 The usual rules do not apply to this offer because it is
made under an employee share scheme. As a result, you may not be given all the information usually required. You will also have fewer other legal protections for this investment. 

In compliance with applicable New Zealand securities laws, you are entitled to receive, in electronic or other form and free of cost, copies of the
Company’s latest annual report, relevant financial statements and the auditor’s report on said financial statements (if any). You may obtain copies of such documents on written request to the Company at attn: General Counsel, Datadog,
Inc., 620 8th Avenue, New York, New York 10018, United States of America. Filings made with the U.S. SEC also may be found at http://www.sec.gov. You are advised to ask questions, read all documents carefully, and seek independent financial advice
before committing yourself. 
 NORWAY 
 There are
no country-specific provisions. 
 POLAND 

Notifications 
 Exchange Control
Information. Polish residents holding foreign securities (including shares of Class A Common Stock) abroad must report information to the National Bank of Poland on transactions and balances of the securities deposited in such accounts
if the value of such transactions or balances (calculated individually or together with other assets or liabilities held abroad) exceeds PLN 7,000,000. If required, the reports are due on a quarterly basis. Polish residents are also required to
transfer funds through a bank account or payment institution in Poland if the transferred amount in any single transaction exceeds a specified threshold (currently EUR 15,000, unless the transfer of funds is considered to be connected with the
business activity of an entrepreneur, in which case a lower threshold may apply). Further, upon the request of a Polish bank, Polish residents are required to inform the bank about all foreign exchange transactions performed through such bank. In
addition, Polish residents are required to store documents connected with any foreign exchange transaction for a period of 5 years from the end of the year in which such transaction was made. Penalties may apply for failure to comply with exchange
control requirements. 
 ROMANIA 

Notifications 
 Exchange Control Information.
Any transfer of funds exceeding €15,000 (whether made through a single transfer or a series of transfers) must be reported to the National Office for Prevention and Control of Money Laundering on specific forms by the relevant bank of financial
institution. If you deposit proceeds from the sale of Class A Common Stock in a bank account in Romania, you may have to provide the Romanian bank through which the operations are effected with the appropriate documenting regarding receipt of
the funds. You should consult with your personal legal advisor to determine whether you will be required to submit such documentation to the Romanian bank. 

  
 A-8 

 SINGAPORE 

Terms and Conditions 
 Restriction on Sale of
Shares. Shares of Class A Common Stock acquired under the Plan prior to the six (6) month anniversary of the date of grant may not be sold or otherwise offered for sale in Singapore, unless such sale or offer is made pursuant to
the exemptions under Part XIII Division (1) Subdivision (4) (other than section 280) of the Singapore Securities and Futures Act (Chapter 289, 2006 Ed.) (“SFA”) or pursuant to, and in accordance with the conditions of, any other
applicable provision(s) of the SFA. 
 Notifications 

Securities Law Information. The Option is being granted to you pursuant to the “Qualifying Person” exemption under section 273(1)(f) of
the SFA. The Plan has not been, nor will it be, lodged or registered as a prospectus with the Monetary Authority of Singapore. 
 Chief Executive
Officer and Director Notification Obligation. You acknowledge that if you are the Chief Executive Officer (“CEO”) a director, associate director or shadow director of a Singapore Subsidiary, you are subject to certain notification
requirements under the Singapore Companies Act. Among these requirements is an obligation to notify the Singapore Subsidiary in writing when you receive an interest (e.g., Options or shares of Class A Common Stock) in the Company or any
Subsidiary within two business days of (i) its acquisition or disposal, (ii) any change in previously disclosed interest (e.g., when the shares of Class A Common Stock are sold), or (iii) becoming a CEO, director,
associate director or shadow director. 
 SOUTH KOREA 

Terms and Conditions 
 Exchange Control
Information. If you remit funds out of Korea to pay the exercise price for the option, the remittance of funds must be confirmed by a foreign exchange bank in Korea. 

Notifications 
 Foreign Asset/Account
Reporting Information. Korean residents must declare all foreign financial accounts (e.g., non-Korean bank accounts, brokerage accounts, etc.) to the Korean tax authority and file a report with respect
to such accounts if the value of such accounts exceeds KRW 500 million (or an equivalent amount in foreign currency). You should consult with your personal tax advisor to determine how to value your foreign accounts for purposes of this
reporting requirement and whether you are required to file a report with respect to such accounts. 
 SPAIN 

Terms and Conditions 
 Nature of
Grant. The following provision supplements Section 6 of the Global Stock Option Agreement: 
 In accepting the Option, you consent to
participate in the Plan and acknowledge that the Plan was made available to you and that you read a copy of the Plan and you consent to the terms and conditions of the Option Agreement and acknowledge having received and read a copy of the Option
Agreement. 

  
 A-9 

 You understand and agree that, as a condition of the Option grant, your termination of employment for any
reason (including for the reasons listed below) will automatically result in the forfeiture of the Option and loss of the shares of Class A Common Stock that may have been granted to you and that have not vested as of the date of your
termination of employment. 
 In particular, you understand and agree that the Option will be forfeited without entitlement to the underlying shares of
Class A Common Stock or to any amount as indemnification in the event of your termination of employment prior to vesting by reason of, including, but not limited to: resignation, disciplinary dismissal adjudged to be with cause, disciplinary
dismissal adjudged or recognized to be without good cause (i.e., subject to a “despido improcedente”), individual or collective layoff on objective grounds, adjudged or recognized to be with or without good cause, material
modification of the terms of employment under Article 41 of the Workers’ Statute, relocation under Article 40 of the Workers’ Statute, Article 50 of the Workers’ Statute, unilateral withdrawal by the Company, and under Article 10.3 of
Royal Decree 1382/1985. 
 Furthermore, you understand that the Company has unilaterally, gratuitously and discretionally decided to grant the Options under
the Plan to employees of the Company. The decision is a limited decision that is entered into upon the express assumption and condition that any grant will not economically or otherwise bind the Company on an ongoing basis. Consequently, you
understand that the Option is granted on the assumption and condition that the Option and the shares of Class A Common Stock underlying the Option shall not become a part of any employment or service contract with the Option and shall not be
considered a mandatory benefit, salary for any purposes (including severance compensation) or any other right whatsoever. In addition, you understand that the Option would not be granted to you but for the assumptions and conditions referred to
above; thus, you acknowledge and freely accept that should any or all of the assumptions be mistaken or should any of the conditions not be met for any reason, then any Option granted to you shall be null and void. 

Notifications 
 Securities Law
Information. The Option described in the Option Agreement does not qualify as a security under Spanish regulations. No “offer of securities to the public,” within the meaning of Spanish law, has taken place or will take place in
the Spanish territory. The Option Agreement and any other documents evidencing the Option have not been, nor will they be, registered with the Comisión Nacional del Mercado de Valores (Spanish Securities Exchange Commission), and none of
these documents constitutes a public offering prospectus. 
 Exchange Control Information. The acquisition, ownership and sale of shares of
Class A Common Stock under the Plan must be declared for statistical purposes to the Spanish Dirección General de Comercio e Inversiones (the “DGCI”), the Bureau for Commerce and Investments, which is a department of the
Ministry of Economy and Competitiveness. You also must declare ownership of any shares of Class A Common Stock as of December 31 of the prior year with the Directorate of Foreign Transactions each January. In addition, if the acquisition
or sale of any shares of Class A Common Stock exceeds certain thresholds, it must be declared to the DGCI within 1 month after the sale. 
 When
receiving foreign currency payments derived from the ownership of shares of Class A Common Stock (i.e., sale proceeds), you must inform the financial institution receiving the payment of the basis upon which such payment is made if the payment
exceeds €50,000. You will need to provide the following information: (i) your name, address, and fiscal identification number; (ii) the name and corporate domicile of the Company; (iii) the amount of the payment and the currency
used; (iv) the country of origin; (v) the reasons for the payment; and (vi) further information that may be required. 

  
 A-10 

 In addition, you may be required to declare electronically to the Bank of Spain any foreign accounts
(including brokerage accounts held abroad), any foreign instruments (including any shares of Class A Common Stock acquired under the Plan) and any transactions with non-Spanish residents (including any
payments of shares of Class A Common Stock made to you by the Company) depending on the value of such accounts and instruments and the amount of the transactions during the relevant year as of December 31 of the relevant year. 

SWEDEN 
 There are no country-specific provisions.

 SWITZERLAND 
 Notifications 

Securities Law Information. The Option grant is not intended to be publicly offered in or from Switzerland. Because it is considered a private
offering, it is not subject to securities registration in Switzerland. Neither this document nor any other materials relating to the Option (i) constitutes a prospectus as such term is understood pursuant to article 652a of the Swiss Code of
Obligations, (ii) may be publicly distributed nor otherwise made publicly available in Switzerland or (iii) has been or will be filed with, approved or supervised by any Swiss regulatory authority, including the Swiss Financial Market
Supervisory Authority (“FINMA”). 
 UNITED ARAB EMIRATES 

Terms and Conditions 
 Nature of
Grant. The following provision supplements Section 6 of the Global Stock Option Agreement: 
 You acknowledge that the Option and related
benefits do not constitute a component of your “wages” for any legal purpose. Therefore, the Option and related benefits will not be included and/or considered for purposes of calculating any and all labor benefits, such as social
insurance contributions and/or any other labor-related amounts which may be payable. 
 Notifications 

Securities Law Information. Options are being offered only to eligible employees of the Company and are in the nature of providing equity
incentives to employees in the United Arab Emirates. Any award agreement related to the Option is intended for distribution only to such eligible employees and must not be delivered to, or relied on by, any other person. Prospective acquirers of the
securities offered should conduct their own due diligence on the securities. 
 United Arab Emirates securities or financial/economic authorities have no
responsibility for reviewing or verifying any award documentation and have not approved the award documentation nor taken steps to verify the information set out therein, and thus, are not responsible for the content. 

You should, as a prospective stockholder, conduct your own due diligence on the securities. If you do not understand the contents of the award documentation,
you should consult an authorized financial advisor. 

  
 A-11 

 UNITED KINGDOM 

Terms and Conditions 
 Withholding
Obligations. This provision supplements Section 4 of this Global Stock Option Agreement: 
 Without limitation to this
Section 4, you hereby agree that you are liable for any Tax-Related Items related to your participation in the Plan and hereby covenants to pay such Tax-Related
Items, as and when requested by the Company or (if different) the Employer or by Her Majesty’s Revenue & Customs (“HMRC”) (or any other tax authority or any other relevant authority). You also hereby agree
to indemnify and keep indemnified the Company and (if different) the Employer against any Tax-Related Items that they are required to pay or withhold or have paid or will pay to HMRC (or any other tax
authority or any other relevant authority) on your behalf. 
 Notwithstanding the indemnification provision in this Section 4, if you are a director or
executive officer of the Company (within the meaning of Section 13(k) of the Exchange Act), the amount of any income tax due but not collected from or paid by you within ninety (90) days of the end of the U.K. tax year in which an event
giving rise to the Tax-Related Items withholding obligation occurs may constitute an additional benefit to you on which additional income tax and National Insurance Contributions
(“NICs”) may be payable. You will be responsible for reporting and paying any income tax due on this additional benefit directly to Her Majesty’s Revenue and Customs under the self-assessment regime and for reimbursing
the Company and/or the Employer for the value of any employee NICs due on this additional benefit, which the Company and/or the Employer may recover at any time thereafter by any of the means referred to in this Global Stock Option Agreement. 

  
 A-12 

 DATADOG, INC. 

RSU AWARD GRANT NOTICE 

(2019 EQUITY INCENTIVE PLAN) 

Datadog, Inc. (the “Company”) has awarded to you (the “Participant”) the number of restricted stock units
specified and on the terms set forth below in consideration of your services (the “RSU Award”). Your RSU Award is subject to all of the terms and conditions as set forth herein and in the Company’s 2019 Equity Incentive
Plan (the “Plan”) and the Global RSU Award Agreement, including any additional terms and conditions for your country included in the appendix attached thereto (the “Agreement”), which are incorporated
herein in their entirety. Capitalized terms not explicitly defined herein but defined in the Plan or the Agreement shall have the meanings set forth in the Plan or the Agreement. 

 

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

  

			
	Vesting Schedule:	  	 [__________________________________________________________________].

Notwithstanding the foregoing, vesting shall terminate upon the Participant’s termination of Continuous Service.

		
	Issuance Schedule:	  	One share of Class A Common Stock will be issued for each restricted stock unit which vests at the time set forth in Section 5 of the Agreement.

 Participant Acknowledgements: By your signature below or by electronic acceptance or authentication in a form
authorized by the Company, you understand and agree that: 
  

	 	•	 	 The RSU Award is governed by this RSU Award Grant Notice (the “Grant Notice”), and the
provisions of the Plan and the Agreement, all of which are made a part of this document. Unless otherwise provided in the Plan, this Grant Notice and the Agreement (together, the “RSU Award Agreement”) may not be modified,
amended or revised except in a writing signed by you and a duly authorized officer of the Company. 

  

	 	•	 	 You have read and are familiar with the provisions of the Plan, the RSU Award Agreement and the Prospectus. In
the event of any conflict between the provisions in the RSU Award Agreement, or the Prospectus and the terms of the Plan, the terms of the Plan shall control. 

 

	 	•	 	 The RSU Award Agreement sets forth the entire understanding between you and the Company regarding the acquisition
of Class A Common Stock and supersedes all prior oral and written agreements, promises and/or representations on that subject with the exception of: (i) other equity awards previously granted to you, and (ii) any written employment
agreement, offer letter, severance agreement, written severance plan or policy, or other written agreement between the Company and you in each case that specifies the terms that should govern this RSU Award. 

 

									
	DATADOG, INC.	 		 		 	PARTICIPANT:
					
	By:	 	  
	 		 	    	 	  

		 	Signature	 		 		 	Signature
				
	Title:	 		 		 	Date:                     
				
	Date:                     	 		 		 	

  

 DATADOG, INC. 

2019 EQUITY INCENTIVE PLAN 

GLOBAL RSU AWARD AGREEMENT 

As reflected by your RSU Award Grant Notice (“Grant Notice”) Datadog, Inc. (the “Company”) has
granted you a RSU Award under its 2019 Equity Incentive Plan (the “Plan”) for the number of restricted stock units as indicated in your Grant Notice (the “RSU Award”). The terms of your RSU Award as
specified in this Global RSU Award Agreement for your RSU Award, including any additional terms and conditions for your country included in the appendix attached thereto (the “Agreement”) and the Grant Notice constitute your
“RSU Award Agreement”. Capitalized terms not explicitly defined in this Agreement but defined in the Grant Notice or the Plan shall have the same definitions as in the Grant Notice or Plan, as applicable. 

The general terms applicable to your RSU Award are as follows: 

1. GOVERNING PLAN DOCUMENT. Your RSU Award is subject to all the provisions of the
Plan. Your RSU Award is further subject to all interpretations, amendments, rules and regulations, which may from time to time be promulgated and adopted pursuant to the Plan. In the event of any conflict between the RSU Award Agreement and the
provisions of the Plan, the provisions of the Plan shall control. 
 2. GRANT OF THE
RSU AWARD. This RSU Award represents your right to be issued on a future date the number of shares of the Company’s Class A Common Stock that is equal to the number of restricted stock units indicated in the Grant Notice
subject to your satisfaction of the vesting conditions set forth therein (the “Restricted Stock Units”). Any additional Restricted Stock Units that become subject to the RSU Award pursuant to Capitalization Adjustments as set
forth in the Plan and the provisions of Section 3 below, if any, shall be subject, in a manner determined by the Board, to the same forfeiture restrictions, restrictions on transferability, and time and manner of delivery as applicable to the
other Restricted Stock Units covered by your RSU Award. 
 3. DIVIDENDS. You may become entitled to
receive payments equal to any cash dividends and other distributions paid with respect to a corresponding number of shares of Class A Common Stock to be issued in respect of the Restricted Stock Units covered by your RSU Award. Any such
dividends or distributions shall be subject to the same forfeiture restrictions as apply to the Restricted Stock Units and shall be paid at the same time that the corresponding shares are issued in respect of your vested Restricted Stock Units,
provided, however that to the extent any such dividends or distributions are paid in shares of Class A Common Stock, then you will automatically be granted a corresponding number of additional Restricted Stock Units subject to the RSU Award
(the “Dividend Units”), and further provided that such Dividend Units shall be subject to the same forfeiture restrictions and restrictions on transferability, and same timing requirements for issuance of shares, as apply to
the Restricted Stock Units subject to the RSU Award with respect to which the Dividend Units relate. 
 4. WITHHOLDING
OBLIGATIONS. 
 (a) You acknowledge that, regardless of any action taken by the Company or, if different, the
Affiliate employing you (the “Employer”), the ultimate liability for all income tax (including U.S. federal, state, and local taxes and/or foreign taxes), social insurance, payroll tax, fringe benefits tax, payment on
account or other tax-related items related to your participation in the Plan and legally applicable to you (“Tax-Related Items”) is and remains
your responsibility and may exceed the 

  
 1 

 
amount, if any, actually withheld by the Company or the Employer. You further acknowledge that the Company and/or your Employer (i) make no representations or undertakings regarding the
treatment of any Tax-Related Items in connection with any aspect of the RSU Award, including, but not limited to, the grant of the RSU Award, the vesting of the RSU Award, the issuance of shares in settlement
of vesting of the RSU Award, the subsequent sale of any shares of Class A Common Stock acquired pursuant to the RSU Award and the receipt of any dividends, Dividend Units or other dividend equivalents; and (ii) do not commit to and are
under no obligation to reduce or eliminate your liability for Tax-Related Items. Further, if you become subject to taxation in more than one country, you acknowledge that the Company and/or your Employer (or
former employer, as applicable) may be required to withhold or account for Tax-Related Items in more than one country. 

(b) Prior to any relevant taxable or tax withholding event, as applicable, you agree to make adequate arrangements satisfactory to the
Company and/or the Employer to satisfy all Tax-Related Items. In this regard, you authorize the Company and/or the Employer, or their respective agents, at their discretion, to satisfy any applicable
withholding obligations with regard to all Tax-Related Items by one or a combination of the following: (i) withholding from your wages or other cash compensation paid to you by the Company and/or the
Employer; (ii) withholding from proceeds of the sale of shares of Class A Common Stock acquired upon settlement of the Restricted Stock Units either through a voluntary sale or through a mandatory sale arranged by the Company (on your
behalf pursuant to this authorization without further consent); (iii) withholding from shares of Class A Common Stock to be issued to you upon settlement of the Restricted Stock Units; or
(iv) any other method of withholding determined by the Company and permitted by Applicable Law; provided, however, that that if you are a Section 16 officer of the Company under the Exchange Act, then the Administrator shall establish the
method of withholding from alternatives (i)-(iv) herein and, if the Administrator does not exercise its discretion prior to the applicable withholding event, then you shall be entitled to elect the method of withholding from the alternatives above.

 (c) The Company and/or the Employer may withhold or account for Tax-Related Items by
considering applicable statutory withholding amounts or other applicable withholding rates, including maximum rates applicable in your jurisdiction, in which case you may receive a refund of any over-withheld amount in cash and will have no
entitlement to the equivalent amount in shares of Class A Common Stock. If the obligation for Tax-Related Items is satisfied by withholding in shares of Class A Common Stock, for tax purposes, you
are deemed to have been issued the full number of shares of Class A Common Stock subject to the vested Restricted Stock Units, notwithstanding that a number of the shares of Class A Common Stock is held back solely for the purpose of
paying the Tax-Related Items. 
 (d) You agree to pay to the Company or the Employer any
amount of Tax-Related Items that the Company or the Employer may be required to withhold or account for as a result of your participation in the Plan that cannot be satisfied by the means previously described.
The Company may refuse to issue or deliver the shares of Class A Common Stock, or the proceeds of the sale of shares of Class A Common Stock, if you fail to comply with your obligations in connection with the
Tax-Related Items. 
 5. DATE OF ISSUANCE. 

(a) To the extent your RSU Award is exempt from application of Section 409A of the Code and any state law of similar effect
(collectively “Section 409A”), the Company will deliver to you a number of shares of the Company’s Class A Common Stock equal to the number of vested Restricted Stock Units subject
to your RSU Award, including any additional Restricted Stock Units received pursuant to Section 3 above that relate to those vested Restricted Stock Units on the applicable vesting date(s), or if such date is not a business day, such delivery
date shall instead fall on the next following business day (the “Original Distribution Date”). 

  
 2 

 (b) Notwithstanding the foregoing, in the event that you are prohibited from selling
shares of the Company’s Class A Common Stock in the public market on the scheduled delivery date by the Trading Policy or otherwise, and the Company elects not to satisfy its tax withholding obligations by withholding shares from your
distribution, then such shares shall not be delivered on such Original Distribution Date and shall instead be delivered on the first business day when you are not prohibited from selling shares of the Company’s Class A Common Stock in the
open market, but in no event later than the fifteenth (15th) day of the third calendar month of the calendar year following the calendar year in which the shares covered by the RSU Award vest. Delivery of the shares pursuant to the provisions of
Section 5 is intended to comply with the requirements for the short-term deferral exemption available under Treasury Regulations Section 1.409A-1(b)(4) and shall be construed and administered in such
manner. However, if and to the extent the RSU Award is a Non-Exempt Award, the provisions of the Plan with respect to Non-Exempt Awards shall apply in lieu of the
provisions in this Section 5. 
 6. NATURE OF GRANT. In accepting the RSU
Award, you acknowledge, understand and agree that: 
 (a) the Plan is established voluntarily by the Company, it is discretionary in
nature, and may be amended, suspended or terminated by the Company at any time, to the extent permitted by the Plan; 
 (b) the grant
of the RSU Award is exceptional, voluntary and occasional and does not create any contractual or other right to receive future grants of Restricted Stock Units, other equity awards or benefits in lieu of equity awards, even if equity awards have
been granted in the past; 
 (c) all decisions with respect to future RSU Awards or other grants, if any, will be at the sole
discretion of the Company; 
 (d) the RSU Award grant and your participation in the Plan shall not create a right to employment or be
interpreted as forming or amending an employment or service contract with the Company, the Employer or any Affiliate; 
 (e) you are
voluntarily participating in the Plan; 
 (f) the RSU Award and any shares of Class A Common Stock acquired under the Plan, and
the income from and value of same, are not intended to replace any pension rights or compensation; 
 (g) the RSU Award and any shares
of Class A Common Stock acquired under the Plan, and the income from and value of same, are not part of normal or expected compensation for any purpose, including, without limitation, calculating any severance, resignation, termination,
redundancy, dismissal, end-of-service payments, holiday pay, bonuses, long-service awards, pension or retirement or welfare benefits or similar mandatory payments; 

(h) the future value of the shares of Class A Common Stock underlying the RSU Award is unknown, indeterminable, and cannot be
predicted with certainty; 

  
 3 

 (i) if the RSU Award vests and you are issued shares of Class A Common Stock,
the value of such shares of Class A Common Stock may increase or decrease in value following the date the shares are issued; even below the Fair Market Value on the date the RSU Award is granted to you; 

(j) for purposes of the RSU Award, your Continuous Service will be considered terminated as of the date you are no longer actively
providing services to the Company or one of its Affiliates (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 you are employed or the terms of your
employment agreement, if any), and unless otherwise expressly provided in this Agreement or determined by the Company, your right to vest in the RSU Award under the Plan, if any, will terminate as of such date and will not be extended by any notice
period or any period of “garden leave” or similar period mandated under employment laws in the jurisdiction where you are employed or the terms of your employment agreement, if any); and the Board shall have the exclusive discretion to
determine when you are no longer actively providing services for purposes of the RSU Award (including whether you may still be considered to be providing services while on a leave of absence); 

(k) no claim or entitlement to compensation or damages shall arise from forfeiture of the RSU Award resulting from your termination of
Continuous Service (for any reason whatsoever, whether or not later found to be invalid or in breach of employment laws in the jurisdiction where you are employed, or the terms of your employment agreement, if any); 

(l) unless otherwise agreed with the Company in writing, the RSU Award and any shares of Class A Common Stock acquired under the
Plan, and the income from and value of same, are not granted as consideration for, or in connection with, any service you may provide as a director of the Company or any Affiliate; and 

(m) neither the Company, the Employer or any Affiliate shall be liable for any foreign exchange rate fluctuation between your local
currency and the United States Dollar that may affect the value of the RSU Award or the subsequent sale of any shares of Class A Common Stock acquired upon settlement of the RSU Award. 

7. TRANSFERABILITY. Except as otherwise provided in the Plan, your RSU Award is not transferable, except by will
or by the applicable laws of descent and distribution 
 8. CORPORATE TRANSACTION. Your RSU Award
is subject to the terms of any agreement governing a Corporate Transaction involving the Company, including, without limitation, a provision for the appointment of a stockholder representative that is authorized to act on your behalf with respect to
any escrow, indemnities and any contingent consideration. 
 9. NO LIABILITY FOR
TAXES. As a condition to accepting the RSU Award, you hereby (a) agree to not make any claim against the Company, or any of its Officers, Directors, Employees or Affiliates related to tax liabilities arising
from the RSU Award or other Company compensation and (b) acknowledge that you were advised to consult with your own personal tax, financial and other legal advisors regarding the tax consequences of the RSU Award and have either done so or
knowingly and voluntarily declined to do so. 
 10. SEVERABILITY. If any part of this Agreement
or the Plan is declared by any court or governmental authority to be unlawful or invalid, such unlawfulness or invalidity will not invalidate any portion of this Agreement or the Plan not declared to be unlawful or invalid. Any Section of this
Agreement (or part of such a Section) so declared to be unlawful or invalid will, if possible, be construed in a manner which will give effect to the terms of such Section or part of a Section to the fullest extent possible while remaining lawful
and valid. 

  
 4 

 11. WAIVER. You acknowledge that a waiver by the Company
of a breach of any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach of this Agreement. 

12. NO ADVICE REGARDING GRANT. The Company is not providing any
tax, legal or financial advice, nor is the Company making any recommendations regarding your participation in the Plan, or your acquisition or sale of the underlying shares of Class A Common Stock. 

13. DATA PRIVACY. By signing the Grant Notice or otherwise accepting
this Agreement in accordance with the Company’s acceptance procedures, you acknowledge that, in order for the Company to administer the grant of the RSU and any future participation in the Plan, the Company and the Employer must collect,
process and transfer certain of your personal data, subject to the GDPR privacy policy for employees, workers and contractors (Europe). 

14. LANGUAGE. You acknowledge that you are sufficiently proficient in the English language, or have consulted
with an advisor who is sufficiently proficient in English, so as to allow you to understand the terms and conditions of this Agreement. If you have received this Agreement or any other documents 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. 
 15.
GOVERNING LAW/VENUE. This Agreement and any controversy arising out of or relating to this Agreement shall be governed by, and construed in accordance with, the internal laws of the State of
Delaware, without regard to conflict of law principles that would result in any application of any law other than the law of the State of Delaware. For purposes of any action, lawsuit or other proceeding brought to enforce this Agreement,
relating to it, or arising from it, the parties hereby submit to and consent to the sole and exclusive jurisdiction of the courts of New York County, New York, or the federal courts for the United States for the Southern District of New York, and no
other courts where this grant is made and/or to be performed. 
 16. INSIDER TRADING
RESTRICTIONS / MARKET ABUSE LAW. You may be subject to insider trading restrictions and/or market abuse laws based on the exchange on which the shares of Class A Common Stock
are listed and in applicable jurisdictions, including the United States, your country and the designated broker’s country, which may affect your ability to accept, acquire, sell or otherwise dispose of shares of Class A Common Stock,
rights to shares of Class A Common Stock (i.e., RSU Awards) or rights linked to the value of the shares of Class A Common Stock under the Plan during such times as you are considered to have “inside information” regarding
the Company (as defined by the laws in the applicable jurisdiction(s)). Local insider trading laws and regulations may prohibit the cancellation or amendment of orders you placed before you possessed inside information. Furthermore, you could be
prohibited from (i) disclosing the inside information to any third party, which may include fellow employees and (ii) “tipping” third parties or causing them otherwise to buy or sell securities. Any restrictions under these laws or
regulations are separate from and in addition to any restrictions that may be imposed under the Company’s Insider Trading Policy, or any other applicable insider trading policy then in effect. You acknowledge that you are responsible for
complying with any applicable restrictions and are encouraged to speak with your personal legal advisor for further details regarding any applicable insider-trading and/or market-abuse laws in your country. 

  
 5 

 17. FOREIGN ASSET/ACCOUNT,
EXCHANGE CONTROL AND TAX REPORTING. You may be subject to foreign asset/account, exchange control and/or tax reporting requirements as a result of the acquisition,
holding and/or transfer of shares of Class A Common Stock or cash (including dividends and the proceeds arising from the sale of shares of Class A Common Stock) derived from your participation in the Plan in, to and/or from a
brokerage/bank account or legal entity located outside your country. The Applicable Laws in your country may require that you report such accounts, assets and balances therein, the value thereof and/or the transactions related thereto to the
applicable authorities in such country. You may also be required to repatriate sale proceeds or other funds received as a result of your participation in the Plan to your country through a designated bank or broker within a certain time after
receipt. You acknowledge that it is your responsibility to be compliant with such regulations and you are encouraged to consult with your personal legal advisor for any details. 

18. COUNTRY-SPECIFIC PROVISIONS. Notwithstanding any provisions of this
Agreement to the contrary, if you reside or are employed outside of the United States, the RSU Award shall be subject to any terms and conditions for your country of residence (and country of employment, if different) set forth in the appendix
attached hereto (the “Appendix”). Further, if you transfer residence and/or employment to another country reflected in the Appendix, the terms and conditions for such country will apply to you to the extent the Company
determines, in its sole discretion, that the application of such terms and conditions is necessary or advisable for legal or administrative reasons. The Appendix constitutes part of this Agreement. 

19. IMPOSITION OF OTHER REQUIREMENTS. The Company reserves the
right to impose other requirements on your participation in the Plan, on the RSU Award and on any shares of Class A Common Stock acquired under the Plan, to the extent the Company determines it is necessary or advisable for legal or
administrative reasons, and to require you to sign any additional agreements or undertakings that may be necessary to accomplish the foregoing. 

20. OTHER DOCUMENTS. You hereby acknowledge receipt of or the right to receive a document
providing the information required by Rule 428(b)(1) promulgated under the Securities Act, which includes the Prospectus. In addition, you acknowledge receipt of the Company’s Trading Policy. 

21. QUESTIONS. If you have questions regarding these or any other terms and conditions applicable to your RSU
Award, including a summary of the applicable federal income tax consequences please see the Prospectus. 
  

  
 6 

 APPENDIX 

TO THE 
 DATADOG, INC.

 2019 EQUITY INCENTIVE PLAN 

GLOBAL RSU AWARD AGREEMENT 
 Capitalized
terms used but not defined in this Appendix have the meanings set forth in the Plan, the Grant Notice and/or the Global RSU Award Agreement. 
 Terms
and Conditions 
 This Appendix includes additional terms and conditions that govern the RSU Award granted to you under the Plan if you are an
employee that works or resides outside the U.S. and/or in one of the countries listed below. If you are a citizen or resident of a country other than the one in which you are currently working and/or residing, transfer employment and/or residency to
another country after the date of grant, are a consultant, change employment status to a consultant position, or are considered a resident of another country for local law purposes, the Company shall, in its discretion, determine the extent to which
the special terms and conditions contained herein shall be applicable to you. References to your Employer shall include any entity that engages your services. 

Notifications 
 This Appendix also includes
information regarding exchange controls and certain other issues of which you should be aware with respect to your participation in the Plan. The information is provided solely for your convenience and is based on the securities, exchange control
and other laws in effect in the respective countries as of September 2019. Such laws are often complex and change frequently. As a result, the Company strongly recommends that you not rely on the information noted herein as the only source of
information relating to the consequences of your participation in the Plan because the information may be out of date by the time you vest in the RSU or sell any shares of Class A Common Stock acquired upon settlement of the vested RSU. 

In addition, the information contained in this Appendix is general in nature and may not apply to your particular situation, and the Company is not in a
position to assure you of any particular result. Accordingly, you should seek appropriate professional advice as to how the applicable laws in your country may apply to your situation. 

Finally, if you are a citizen or resident of a country other than the one in which you are currently residing and/or working, transfer to another country
after the date of grant, or are considered a resident of another country for local law purposes, the notifications contained herein may not be applicable to you in the same manner. 

AUSTRALIA 
 Notifications 

Tax Conditions. Subdivision 83A-C of the Income Tax Assessment Act 1997 (Cth) applies to the RSU
Award granted under the Plan, such that the RSU Award is intended to be subject to deferred taxation. 
 Securities Law Information. If
you acquire shares of Class A Common Stock under the Plan and offer such shares of Class A Common Stock for sale to a person or entity resident in Australia, the offer may be subject to disclosure requirements under Australian law. You
should obtain legal advice regarding your disclosure obligations prior to making any such offer. 

  
 A-1 

 Exchange Control Information. If you are an Australian resident, exchange control
reporting is required for cash transactions exceeding AUD10,000 and international fund transfers. If an Australian bank is assisting with the transaction, the bank will file the report on your behalf. If there is no Australian bank involved with the
transfer, you will be required to file the report. 
 AUSTRIA 

Notifications 
 Exchange Control
Information. If you hold securities (including shares of Class A Common Stock acquired under the Plan) outside of Austria, you will be required to submit reports to the Austrian National Bank as follows: (i) on a quarterly basis if
the value of the shares of Class A Common Stock as of any given quarter meets or exceeds €30,000,000; and (ii) on an annual basis if the value of the shares of Class A Common Stock as of December 31 meets or exceeds
€5,000,000. The deadline for filing the quarterly report is the 15th day of the month following the end of the respective quarter. The deadline for filing the annual report is January 31 of the following year. 

In addition, if you hold cash (including proceeds from the shares of Class A Common Stock and any cash dividend equivalents or cash dividends) outside of
Austria, you may be required to comply with certain exchange control obligations. If the transaction volume of all of your cash accounts abroad meets or exceeds €10,000,000, the movements and balances of all accounts must be reported monthly,
as of the last day of the month, on or before the 15th day of the following month, on a prescribed form (Meldungen SI-Forderungen und/oder SI-Verpflichtungen). 

BRAZIL 
 Terms and Conditions 

Compliance with the Law. By accepting the Restricted Stock Units, you acknowledge your agreement to comply with applicable Brazilian laws and to
pay any and all applicable Tax-Related Items. 
 Nature of Grant. The following provision supplements
Section 6 of the Global RSU Award Agreement: 
 By accepting the Restricted Stock Units, you agree that (i) you are making an investment decision
and (ii) the value of the underlying shares of Class A Common Stock is not fixed and may increase or decrease over the vesting period without compensation to you. You understand that the RSU is granted to you by the Company and does not
constitute part of your normal compensation or salary. You further understand that the RSU was granted by the Company as a one-time benefit. 

Notifications 
 Exchange Control
Notification. If you hold assets and rights outside Brazil with an aggregate value exceeding USD 100,000, you will be required to prepare and submit to the Central Bank of Brazil an annual declaration of such assets and rights, including:
(i) bank deposits; (ii) loans; (iii) financing transactions; (iv) leases; (v) direct investments; (vi) portfolio investments, including shares of Common Stock acquired under the Plan; (vii) financial derivatives investments;
and (viii) other investments, including real estate and other assets. Please note that foreign individuals holding Brazilian visas are considered Brazilian residents for purposes of this reporting requirement and must declare at least the

  
 A-2 

 
assets held abroad that were acquired subsequent to the date of admittance as a resident of Brazil. Individuals holding assets and rights outside Brazil valued at less than USD 100,000 are not
required to submit a declaration. Individuals holding assets and rights outside Brazil valued at more than USD 100,000,000 are required to submit a quarterly declaration. 

CANADA 
 Terms and Conditions 

Settlement of Restricted Stock Units. Notwithstanding any terms or conditions of the Plan or the RSU Award Agreement to the contrary,
Restricted Stock Units and any dividend equivalents will be settled in shares of Common Stock only, not cash. 
 Termination. The
following provision replaces Section 6(j) of the Global RSU Award Agreement in its entirety: 
 (j) In the event of the termination of
your Continuous Service (whether or not later found to be invalid or in breach of employment laws in the jurisdiction where you are employed or the terms of your employment agreement, if any), unless otherwise provided in the RSU Award Agreement or
determined by the Company, your right to vest in the RSU Award under the Plan will terminate effective as of the earlier of (i) the date upon which you cease to provide services, or (ii) the date upon which you receive a notice of
termination and will not in either case be extended by any contractual notice period in which you do not actively provide services or any period of pay in lieu of such notice (including, but not limited to Canadian statutory law, regulatory law
and/or common law) mandated under employment laws in the jurisdiction where you are employed or the terms of your employment agreement, if any; the Board shall have the exclusive discretion to determine when you are no longer actively providing
services for purposes of the RSU Award (including whether you may still be considered to be providing services while on a leave of absence); 
 The
following terms and conditions apply to employees resident in Quebec: 
 Language. The parties acknowledge that it is their express
wish that this Agreement, as well as all documents, notices and legal proceedings entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. 

Les parties reconnaissent avoir exigé la rédaction en anglais de cette Convention, ainsi que de tous documents, avis et procédures
judiciaires, exécutés, donnés ou intentés en vertu de, ou liés directement ou indirectement à, la présente convention. 

Data Privacy. This provision supplements Section 13 of the Global RSU Award Agreement: 

You hereby authorize the Company or any Affiliate, including the Employer, and any agents or representatives to (i) discuss with and obtain all relevant
information from all personnel, professional or non-professional, involved in the administration and operation of the Plan, and (ii) disclose and discuss any and all information relevant to the Plan with
their advisors. You further authorize the Company or any Affiliate, including the Employer, and any agents or representatives to record such information and to keep such information in your employee file. 

  
 A-3 

 Notifications 

Securities Law Information. You are permitted to sell shares of Class A Common Stock acquired under the Plan through the designated
broker appointed under the Plan, if any, provided the resale of shares of Class A Common Stock acquired under the Plan takes place outside Canada through the facilities of the exchange on which the shares of Class A Common Stock are then
listed. 
 Foreign Asset/Account Reporting Information. Canadian residents are required to report any foreign specified property held
outside Canada (including RSU Awards and shares of Class A Common Stock acquired under the Plan) annually on form T1135 (Foreign Income Verification Statement) if the total cost of the foreign specified property exceeds CAD 100,000 at any time
during the year. Thus, if the CAD 100,000 cost threshold is exceeded by other foreign specified property held by the individual, RSU Awards must be reported (generally at a nil cost). For purposes of such reporting, shares of Class A Common
Stock acquired under the Plan may be reported at their adjusted cost basis. The adjusted cost basis of a share is generally equal to the fair market value of such share at the time of acquisition; however, if you own other shares of Class A
Common Stock (e.g., acquired under other circumstances or at another time), the adjusted cost basis may have to be averaged with the adjusted cost bases of the other shares of Class A Common Stock. You should consult with your
personal legal advisor to ensure compliance with applicable reporting obligations. 
 CZECH REPUBLIC 

Notifications 
 Exchange Control
Notification. You may be required to fulfill certain notification duties in relation to the Restricted Stock Units and the opening and maintenance of a foreign account, including reporting foreign financial assets with a value of CZK
200,000,000 or more. You should consult your personal legal advisor to ensure compliance with the applicable requirements. 
 DENMARK

 Terms and Conditions 
 Stock
Option Act. You acknowledge that you received the Employer Statement in Danish which sets forth additional terms of the Restricted Stock Units, to the extent the Danish Stock Option Act applies. 

Notifications 
 Foreign Asset / Account
Reporting Notification. If you establish an account holding cash or shares of Class A Common Stock outside Denmark, you must report the account to the Danish Tax Administration. The form may be obtained from a local bank. 

FRANCE 
 Terms and Conditions 

Language Consent. By accepting the RSU Award, you confirm having read and understood the documents related to the RSU Award (the Plan and
the RSU Award Agreement) which were provided in the English language. You accept the terms of these documents accordingly. 
 Consentement à la
Langue Utilisée. En acceptant l’attribution de droits sur des actions assujettis à restrictions (RSU Award, l’ « Attribution de RSU »), vous confirmez avoir lu et compris les documents relatifs
à l’attribution (le Plan et le Contrat d’Attribution de RSU) qui ont été remis en anglais. Vous acceptez les termes de ces documents en connaissance de cause. 

  
 A-4 

 Notifications 

Tax Information. This RSU Award is not intended to qualify for specific tax and social security treatment applicable to awards granted
under Section L. 225-197.1 to L. 225-197.6 of the French Commercial Code, as amended. 

Foreign Asset/Account Reporting Information. If you hold cash or shares of Class A Common Stock outside of France or maintain a
foreign bank or brokerage account (including accounts that were opened and closed during the tax year), you are required to report such assets and accounts to the French tax authorities on an annual basis on a specified form, together with your
income tax return. Failure to complete this reporting can trigger significant penalties. 
 GERMANY 

Notifications 
 Exchange Control
Information. Cross-border payments in excess of EUR 12,500 must be reported monthly to the German Federal Bank (Bundesbank). If you receive a payment in excess of EUR 12,500 in connection with the sale of shares of Class A
Common Stock acquired under the Plan or the receipt of any cash dividends, the report must be filed electronically by the fifth day of the month following the month in which the payment was received. The form of report (Allgemeines Meldeportal
Statistik) can be accessed via the Bundesbank’s website (www.bundesbank.de) and is available in both German and English. 
 Foreign
Asset/Account Reporting Information. German residents holding shares of Class A Common Stock must notify their local tax office of the acquisition of shares of Class A Common Stock when they file their returns for the
relevant year if the value of the shares of Class A Common Stock exceeds EUR 150,000 or in the unlikely event that the resident holds shares of Class A Common Stock exceeding 10% of the Company’s share capital. 

INDIA 
 Notifications 

Exchange Control Information. Indian residents are required to repatriate the proceeds from the sale of shares of Class A Common Stock to
India within specified timeframes. You must retain the foreign inward remittance certificate received from the bank where the foreign currency is deposited in the event that the Reserve Bank of India or the Employer requests proof of repatriation.
It is your responsibility to comply with these requirements. Neither the Company nor the Employer will be liable for any fines or penalties resulting from your failure to comply with any Applicable Laws. 

Foreign Asset/Account Reporting Information. Indian residents are required to declare any foreign bank accounts and any foreign financial assets
(including shares of Class A Common Stock held outside of India) in their annual tax returns. You are responsible for complying with this reporting obligation and should confer with your personal tax advisor to determine your obligations in
this regard. 
 IRELAND 
 There are no
country-specific provisions. 

  
 A-5 

 ITALY 

Terms and Conditions 
 Plan Document
Acknowledgement. By accepting the Restricted Stock Units, you acknowledge that you have received a copy of the Plan, have reviewed the Plan and the RSU Award Agreement in their entirety and fully understand and accept all provisions of the
Plan and the RSU Award Agreement. 
 You acknowledge that you have read and specifically and expressly approve the following sections of the Global RSU
Award Agreement and this Appendix, including: (4) Withholding Obligations; (9) No Liability for Taxes; (10) Severability; (11) Waiver; (13) Data Privacy; (14) Language; (15) Venue; and the Italy country-specific Terms and
Conditions of this Appendix. 
 Notifications 

Foreign Asset/Account Reporting Information. If you are an Italian resident and, during any fiscal year, hold investments or financial assets
outside of Italy (e.g., cash, shares of Class A Common Stock) which may generate income taxable in Italy (or if you are the beneficial owner of such an investment or asset even if you do not directly hold the investment or asset), you
are required to report such investments or assets on your annual tax return for such fiscal year (on UNICO Form, RW Schedule, or on a special form if you are not required to file a tax return). 

Foreign Financial Assets Tax. The fair market value of any shares of Common Stock held outside of Italy is subject to a foreign assets tax.
Financial assets include shares of Class A Common Stock acquired under the Plan. The taxable amount will be the fair market value of the financial assets assessed at the end of the calendar year. You should consult with your personal tax
advisor about the foreign financial assets tax. 
 JAPAN 

Notifications 
 Exchange Control
Information. Japanese residents acquiring shares of Class A Common Stock valued at more than JPY 100,000,000 in a single transaction must file a Securities Acquisition Report with the Ministry of Finance
(“MOF”) through the Bank of Japan within twenty (20) days of the acquisition of the shares. 
 Foreign Asset/Account
Reporting Information. Japanese residents are required to report details of any assets held outside Japan as of December 31st (including shares of Class A Common Stock acquired under the Plan), to the extent such assets have a
total net fair market value exceeding JPY 50,000,000. Such report is due by March 15th each year. You should consult your personal legal advisor to ensure compliance with applicable reporting obligations. 

NETHERLANDS 
 There are no country-specific
provisions. 

  
 A-6 

 NEW ZEALAND 

Notifications 
 Securities Law
Information. 
 Warning 
 This is an offer of
rights to receive shares of Class A Common Stock underlying the Restricted Stock Units. Restricted Stock Units give you a stake in the ownership of the Company. You may receive a return if dividends are paid on the shares of Class A Common
Stock. Shares of Class A Common Stock are quoted on the Nasdaq. This means you may be able to sell them on the Nasdaq if there are interested buyers. You may get less than invested. The price will depend on the demand for the shares of
Class A Common Stock 
 If the Company runs into financial difficulties and is wound up, you will be paid only after all creditors and holders of
preferred shares have been paid. You may lose some or all of your investment. 
 New Zealand law normally requires people who offer financial products to
give information to investors before they invest. This information is designed to help investors to make an informed decision. 
 The usual rules do not
apply to this offer because it is made under an employee share scheme. As a result, you may not be given all the information usually required. You will also have fewer other legal protections for this investment. 

In compliance with applicable New Zealand securities laws, you are entitled to receive, in electronic or other form and free of cost, copies of the
Company’s latest annual report, relevant financial statements and the auditor’s report on said financial statements (if any). You may obtain copies of such documents on written request to the Company at attn: General Counsel, Datadog,
Inc., 620 8th Avenue, New York, New York 10018, United States of America. Filings made with the U.S. SEC also may be found at http://www.sec.gov. You are advised to ask questions, read all documents carefully, and seek independent financial advice
before committing yourself. 
 NORWAY 
 There are
no country-specific provisions. 
 POLAND 

Notifications 
 Exchange Control
Information. Polish residents holding foreign securities (including shares of Class A Common Stock) abroad must report information to the National Bank of Poland on transactions and balances of the securities deposited in such accounts
if the value of such transactions or balances (calculated individually or together with other assets or liabilities held abroad) exceeds PLN 7,000,000. If required, the reports are due on a quarterly basis. Polish residents are also required to
transfer funds through a bank account or payment institution in Poland if the transferred amount in any single transaction exceeds a specified threshold (currently EUR 15,000, unless the transfer of funds is considered to be connected with the
business activity of an entrepreneur, in which case a lower threshold may apply). Further, upon the request of a Polish bank, Polish residents are required to inform the bank about all foreign exchange transactions performed through such bank. In
addition, Polish residents are required to store documents connected with any foreign exchange transaction for a period of 5 years from the end of the year in which such transaction was made. Penalties may apply for failure to comply with exchange
control requirements. 

  
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 ROMANIA 

Notifications 
 Exchange Control Information.
Any transfer of funds exceeding €15,000 (whether made through a single transfer or a series of transfers) must be reported to the National Office for Prevention and Control of Money Laundering on specific forms by the relevant bank of financial
institution. If you deposit proceeds from the sale of Class A Common Stock in a bank account in Romania, you may have to provide the Romanian bank through which the operations are effected with the appropriate documenting regarding receipt of
the funds. You should consult with your personal legal advisor to determine whether you will be required to submit such documentation to the Romanian bank. 

SINGAPORE 
 Terms and Conditions 

Restriction on Sale of Shares. Shares of Class A Common Stock acquired under the Plan prior to the six (6) month anniversary of
the date of grant may not be sold or otherwise offered for sale in Singapore, unless such sale or offer is made pursuant to the exemptions under Part XIII Division (1) Subdivision (4) (other than section 280) of the Singapore Securities and
Futures Act (Chapter 289, 2006 Ed.) (“SFA”) or pursuant to, and in accordance with the conditions of, any other applicable provision(s) of the SFA. 

Notifications 
 Securities Law
Information. The RSU Award is being granted to you pursuant to the “Qualifying Person” exemption under section 273(1)(f) of the SFA. The Plan has not been, nor will it be, lodged or registered as a prospectus with the
Monetary Authority of Singapore. 
 Chief Executive Officer and Director Notification Obligation. You acknowledge that if you are the
Chief Executive Officer (“CEO”) a director, associate director or shadow director of a Singapore Subsidiary, you are subject to certain notification requirements under the Singapore Companies Act. Among these requirements is
an obligation to notify the Singapore Subsidiary in writing when you receive an interest (e.g., RSU Awards or shares of Class A Common Stock) in the Company or any Subsidiary within two business days of (i) its acquisition or disposal,
(ii) any change in previously disclosed interest (e.g., when the shares of Class A Common Stock are sold), or (iii) becoming a CEO, director, associate director or shadow director. 

SOUTH KOREA 
 Notifications 

Foreign Asset/Account Reporting Information. Korean residents must declare all foreign financial accounts (e.g.,
non-Korean bank accounts, brokerage accounts, etc.) to the Korean tax authority and file a report with respect to such accounts if the value of such accounts exceeds KRW 500 million (or an equivalent
amount in foreign currency). You should consult with your personal tax advisor to determine how to value your foreign accounts for purposes of this reporting requirement and whether you are required to file a report with respect to such accounts.

  
 A-8 

 SPAIN 

Terms and Conditions 
 Nature of
Grant. The following provision supplements Section 6 of the Global RSU Award Agreement: 
 In accepting the RSU, you consent to
participate in the Plan and acknowledge that the Plan was made available to you and that you read a copy of the Plan and you consent to the terms and conditions of the RSU Award Agreement and acknowledge having received and read a copy of the RSU
Award Agreement. 
 You understand and agree that, as a condition of the RSU grant, your termination of employment for any reason (including for the reasons
listed below) will automatically result in the forfeiture of the RSU and loss of the shares of Class A Common Stock that may have been granted to you and that have not vested as of the date of your termination of employment. 

In particular, you understand and agree that the RSU will be forfeited without entitlement to the underlying shares of Class A Common Stock or to any
amount as indemnification in the event of your termination of employment prior to vesting by reason of, including, but not limited to: resignation, disciplinary dismissal adjudged to be with cause, disciplinary dismissal adjudged or recognized to be
without good cause (i.e., subject to a “despido improcedente”), individual or collective layoff on objective grounds, adjudged or recognized to be with or without good cause, material modification of the terms of employment under
Article 41 of the Workers’ Statute, relocation under Article 40 of the Workers’ Statute, Article 50 of the Workers’ Statute, unilateral withdrawal by the Company, and under Article 10.3 of Royal Decree 1382/1985. 

  
 A-9 

 Furthermore, you understand that the Company has unilaterally, gratuitously and discretionally decided to
grant the Restricted Stock Units under the Plan to employees of the Company. The decision is a limited decision that is entered into upon the express assumption and condition that any grant will not economically or otherwise bind the Company on an
ongoing basis. Consequently, you understand that the RSU is granted on the assumption and condition that the RSU and the shares of Class A Common Stock underlying the RSU shall not become a part of any employment or service contract with the
RSU and shall not be considered a mandatory benefit, salary for any purposes (including severance compensation) or any other right whatsoever. In addition, you understand that the RSU would not be granted to you but for the assumptions and
conditions referred to above; thus, you acknowledge and freely accept that should any or all of the assumptions be mistaken or should any of the conditions not be met for any reason, then any RSU granted to you shall be null and void. 

Notifications 
 Securities Law
Information. The Restricted Stock Units described in the RSU Award Agreement do not qualify as a security under Spanish regulations. No “offer of securities to the public,” within the meaning of Spanish law, has taken place or will
take place in the Spanish territory. The RSU Award Agreement and any other documents evidencing the Restricted Stock Units have not been, nor will they be, registered with the Comisión Nacional del Mercado de Valores (Spanish Securities
Exchange Commission), and none of these documents constitutes a public offering prospectus. 
 Exchange Control Information. The acquisition,
ownership and sale of shares of Class A Common Stock under the Plan must be declared for statistical purposes to the Spanish Dirección General de Comercio e Inversiones (the “DGCI”), the Bureau for Commerce and Investments,
which is a department of the Ministry of Economy and Competitiveness. You also must declare ownership of any shares of Class A Common Stock as of December 31 of the prior year with the Directorate of Foreign Transactions each January. In
addition, if the acquisition or sale of any shares of Class A Common Stock exceeds certain thresholds, it must be declared to the DGCI within 1 month after the sale. 

When receiving foreign currency payments derived from the ownership of the Restricted Stock Units or shares of Class A Common Stock (i.e., sale
proceeds), you must inform the financial institution receiving the payment of the basis upon which such payment is made if the payment exceeds €50,000. You will need to provide the following information: (i) your name, address, and fiscal
identification number; (ii) the name and corporate domicile of the Company; (iii) the amount of the payment and the currency used; (iv) the country of origin; (v) the reasons for the payment; and (vi) further information
that may be required. 
 In addition, you may be required to declare electronically to the Bank of Spain any foreign accounts (including brokerage accounts
held abroad), any foreign instruments (including the Restricted Stock Units or any shares of Class A Common Stock acquired under the Plan) and any transactions with non-Spanish residents (including any
payments of shares of Class A Common Stock made to you by the Company) depending on the value of such accounts and instruments and the amount of the transactions during the relevant year as of December 31 of the relevant year. 

SWEDEN 
 There are no country-specific provisions.

  
 A-10 

 SWITZERLAND 

Notifications 
 Securities Law
Information. The RSU grant is not intended to be publicly offered in or from Switzerland. Because it is considered a private offering, it is not subject to securities registration in Switzerland. Neither this document nor any other materials
relating to the Restricted Stock Units (i) constitutes a prospectus as such term is understood pursuant to article 652a of the Swiss Code of Obligations, (ii) may be publicly distributed nor otherwise made publicly available in Switzerland
or (iii) has been or will be filed with, approved or supervised by any Swiss regulatory authority, including the Swiss Financial Market Supervisory Authority (“FINMA”). 

UNITED ARAB EMIRATES 
 Terms and Conditions

 Nature of Grant. The following provision supplements Section 6 of the Global RSU Award Agreement: 

You acknowledge that the Restricted Stock Units and related benefits do not constitute a component of your “wages” for any legal purpose. Therefore,
the Restricted Stock Units and related benefits will not be included and/or considered for purposes of calculating any and all labor benefits, such as social insurance contributions and/or any other labor-related amounts which may be payable. 

Notifications 
 Securities Law
Notification. Restricted Stock Units are being offered only to eligible employees of the Company and are in the nature of providing equity incentives to employees in the United Arab Emirates. Any award agreement related to the RSU Award is
intended for distribution only to such eligible employees and must not be delivered to, or relied on by, any other person. Prospective acquirers of the securities offered should conduct their own due diligence on the securities. 

United Arab Emirates securities or financial/economic authorities have no responsibility for reviewing or verifying any award documentation and have not
approved the award documentation nor taken steps to verify the information set out therein, and thus, are not responsible for the content. 
 You should, as
a prospective stockholder, conduct your own due diligence on the securities. If you do not understand the contents of the award documentation, you should consult an authorized financial advisor. 

UNITED KINGDOM 
 Terms and Conditions

 Withholding Obligations. This provision supplements Section 4 of the Global RSU Award Agreement: 

Without limitation to this Section 4, you hereby agree that you are liable for any Tax-Related Items related to
your participation in the Plan and hereby covenants to pay such Tax-Related Items, as and when requested by the Company or (if different) the Employer or by Her Majesty’s Revenue & Customs
(“HMRC”) (or any other tax authority or any other relevant authority). You also hereby agree to indemnify and keep indemnified the Company and (if different) the Employer against any
Tax-Related Items that they are required to pay or withhold or have paid or will pay to HMRC (or any other tax authority or any other relevant authority) on your behalf. 

  
 A-11 

 Notwithstanding the indemnification provision in this Section 4, if you are a director or executive
officer of the Company (within the meaning of Section 13(k) of the Exchange Act), the amount of any income tax due but not collected from or paid by you within ninety (90) days of the end of the U.K. tax year in which an event giving rise
to the Withholding Obligation occurs may constitute an additional benefit to you on which additional income tax and National Insurance Contributions (“NICs”) may be payable. You will be responsible for reporting and paying
any income tax due on this additional benefit directly to Her Majesty’s Revenue and Customs under the self-assessment regime and for reimbursing the Company and/or the Employer for the value of any employee NICs due on this additional benefit,
which the Company and/or the Employer may recover at any time thereafter by any of the means referred to in this Agreement. 

  
 A-12

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