Document:

EX-10.1

 Exhibit 10.1 

Execution Version 

FOURTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

THIS FOURTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT (this “Agreement”) is made as of the 28th day of December, 2015, by and among Datadog, Inc., a Delaware corporation (the “Company”), and each of the investors listed on Schedule A hereto, each of which is referred to
in this Agreement as an “Investor.” 
 RECITALS 

WHEREAS, certain of the Investors (the “Existing Investors”) hold shares of the Company’s Seed Preferred Stock
(as defined below), Series A Preferred Stock (as defined below), Series B Preferred Stock (as defined below), and Series C Preferred Stock (as defined below) and possess certain rights pursuant to a Third Amended and Restated Investors’ Rights
Agreement dated as of January 22, 2015, between the Company and such Investors (the “Prior Agreement”); 

WHEREAS, concurrently with the execution of this Agreement, the Company and certain of the Investors are entering into a Series D
Preferred Stock Purchase Agreement (the “Purchase Agreement”) providing for the sale of shares of the Company’s Series D Preferred Stock (as defined below); 

WHEREAS, the Company and the undersigned desire to induce certain of the Investors to enter into the Purchase Agreement by amending and
restating the Prior Agreement to provide the Investors with rights and privileges as set forth herein; and 
 WHEREAS, the
undersigned constitute the required signatories to amend the Prior Agreement as set forth herein. 
 NOW, THEREFORE, the Prior
Agreement is hereby amended and restated in its entirety, and the parties hereto hereby agree, as follows: 

1.    Definitions. For purposes of this Agreement: 

1.1 “Affiliate” means, with respect to any specified Person, any other Person who, directly or indirectly, controls, is
controlled by, or is under common control with such Person, including without limitation any general partner, managing member, officer or director of such Person or any venture capital fund or investment vehicle now or hereafter existing that is
controlled by one or more general partners or managing members of, or shares or is advised by the same management or advisory company as, such Person. 

1.2 “Board” means the Board of Directors of the Company. 

1.3 “Certificate of Incorporation” means the Company’s Sixth Amended and Restated Certificate of Incorporation, as the
same may be further amended or restated from time to time. 
 1.4 “Common Stock” means shares of the Company’s common
stock, par value $0.00001 per share. 

 1.5 “Conversion Shares” means shares of Common Stock issued or issuable
upon the conversion of Preferred Stock. 
 1.6 “Damages” means any loss, damage, or liability (joint or several) to which a
party hereto may become subject under the Securities Act, the Exchange Act, or other federal or state law, insofar as such loss, damage, or liability (or any action in respect thereof) arises out of or is based upon (i) any untrue statement or
alleged untrue statement of a material fact contained in any registration statement of the Company, including any preliminary prospectus or final prospectus contained therein or any amendments or supplements thereto; (ii) an omission or alleged
omission to state therein a material fact required to be stated therein, or necessary to make the statements therein not misleading; or (iii) any violation or alleged violation by the indemnifying party (or any of its agents or Affiliates) of
the Securities Act, the Exchange Act, any state securities law, or any rule or regulation promulgated under the Securities Act, the Exchange Act, or any state securities law. 

1.7 “Derivative Securities” means any securities or rights convertible into, or exercisable or exchangeable for (in each case,
directly or indirectly), Common Stock, including options and warrants. 
 1.8 “Exchange Act” means the Securities Exchange
Act of 1934, as amended, and the rules and regulations promulgated thereunder. 
 1.9 “Excluded Registration” means
(i) a registration relating to the sale of securities to employees of the Company or a subsidiary pursuant to a stock option, stock purchase, or similar plan; (ii) a registration relating to an SEC Rule 145 transaction; (iii) a
registration on any form that does not include substantially the same information as would be required to be included in a registration statement covering the sale of the Registrable Securities; or (iv) a registration in which the only Common
Stock being registered is Common Stock issuable upon conversion of debt securities that are also being registered. 
 1.10 “Form S-1” means such form under the Securities Act as in effect on the date hereof or any successor registration form under the Securities Act subsequently adopted by the SEC. 

1.11 “Form S-3” means such form under the Securities Act as in effect on the date
hereof or any registration form under the Securities Act subsequently adopted by the SEC that permits incorporation of substantial information by reference to other documents filed by the Company with the SEC. 

1.12 “GAAP” means generally accepted accounting principles in the United States. 

1.13 “Holder” means any holder of Registrable Securities who is a party to this Agreement. 

1.14 “Immediate Family Member” means a child, stepchild, grandchild, parent, stepparent, grandparent, spouse, sibling, mother-in-law, father-in-law,
son-in-law, daughter-in-law, brother-in-law, or sister-in-law, including adoptive relationships, of a natural person referred to herein. 

  
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 1.15 “Initiating Holders” means, collectively, Holders who properly
initiate a registration request under this Agreement. 
 1.16 “IPO” means the Company’s first underwritten public
offering of its Common Stock under the Securities Act. 
 1.17 “Key Employee” means Alexis
Le-Quoc and Olivier Pomel. 
 1.18 “Major Investor” means any Investor that
individually or together with such Investor’s Affiliates, holds at least 300,000 shares of Registrable Securities (as adjusted for any stock split, stock dividend, combination, or other recapitalization or reclassification effected after the
date hereof). 
 1.19 “New Securities” means, collectively, equity securities of the Company, whether or not currently
authorized, as well as rights, options, or warrants to purchase such equity securities, or securities of any type whatsoever that are, or may become, convertible or exchangeable into or exercisable for such equity securities. 

1.20 “Person” means any individual, corporation, partnership, trust, limited liability company, association or other entity.

 1.21 “Preferred Directors” mean, collectively, the Series A Directors and the Series B Director. 

1.22 “Preferred Stock” means, collectively, shares of Seed Preferred Stock, shares of Series A Preferred Stock, shares of
Series B Preferred Stock, shares of Series C Preferred Stock, shares of Series D Preferred Stock, and shares of any other series of Preferred Stock of the Company issued from time to time. 

1.23 “Registrable Securities” means (i) Conversion Shares; (ii) any Common Stock, or any Common Stock issued or
issuable (directly or indirectly) upon conversion and/or exercise of any other securities of the Company, acquired by the Investors after the date hereof; and (iii) any Common Stock issued as (or issuable upon the conversion or exercise of any
warrant, right, or other security that is issued as) a dividend or other distribution with respect to, or in exchange for or in replacement of, the shares referenced in clauses (i) and (ii) above; excluding in all cases, however,
any Registrable Securities sold by a Person in a transaction in which the applicable rights under this Agreement are not assigned pursuant to Subsection 6.1(a), and excluding for purposes of Section 2 any shares for
which registration rights have terminated pursuant to Subsection 2.13 of this Agreement. 
 1.24 “Registrable Securities then
outstanding” means the number of shares determined by adding the number of shares of outstanding Common Stock that are Registrable Securities and the number of shares of Common Stock issuable (directly or indirectly) pursuant to then
exercisable and/or convertible securities that are Registrable Securities. 

  
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 1.25 “Restricted Securities” means the securities of the Company required
to bear the legend set forth in Subsection 2.12(b) hereof. 
 1.26 “Seed Preferred Stock” means shares of the
Company’s Seed Preferred Stock, par value $0.00001 per share. 
 1.27 “SEC” means the Securities and Exchange
Commission. 
 1.28 “SEC Rule 144” means Rule 144 promulgated by the SEC under the Securities Act. 

1.29 “SEC Rule 145” means Rule 145 promulgated by the SEC under the Securities Act. 

1.30 “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 

1.31 “Selling Expenses” means all underwriting discounts, selling commissions, and fees and disbursements of counsel for any
Holder, except for the fees and disbursements of the Selling Holder Counsel borne and paid by the Company as provided in Subsection 2.6. 

1.32 “Series A Directors” means, collectively, the directors of the Company that the holders of record of the Series A
Preferred Stock are entitled to elect pursuant to the Certificate of Incorporation. 
 1.33 “Series A Preferred Stock” mean
shares of the Company’s Series A Preferred Stock, par value $0.00001 per share. 
 1.34 “Series B Director” means the
director of the Company that the holders of record of the Series B Preferred Stock are entitled to elect pursuant to the Certificate of Incorporation. 

1.35 “Series B Preferred Stock” means shares of the Company’s Series B Preferred Stock, par value $0.00001 per share.

 1.36 “Series C Preferred Stock” means shares of the Company’s Series C Preferred Stock, par value $0.00001 per
share. 
 1.37 “Series D Preferred Stock” means shares of the Company’s Series D Preferred Stock, par value $0.00001
per share. 
 2.    Registration Rights. The Company covenants and agrees as follows: 

2.1    Demand Registration. 

(a)    Form S-1 Demand. If at any time after the earlier of (i) three
(3) years after the date of this Agreement or (ii) one hundred eighty (180) days after the effective 

  
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date of the registration statement for the IPO, the Company receives a request from Holders of at least a majority of the Registrable Securities then outstanding that the Company file a Form S-1 registration statement with respect to at least twenty percent (20%) of the Registrable Securities then outstanding (or a lesser percent if the anticipated aggregate offering price, net of Selling Expenses,
would exceed $10 million), then the Company shall (i) within ten (10) days after the date such request is given, give notice thereof (the “Demand Notice”) to all Holders other than the Initiating Holders; and (ii) as
soon as practicable, and in any event within sixty (60) days after the date such request is given by the Initiating Holders, file a Form S-1 registration statement under the Securities Act covering all
Registrable Securities that the Initiating Holders requested to be registered and any additional Registrable Securities requested to be included in such registration by any other Holders, as specified by notice given by each such Holder to the
Company within twenty (20) days of the date the Demand Notice is given, and in each case, subject to the limitations of Subsection 2.1(c) and Subsection 2.3. 

(b)    Form S-3 Demand. If at any time when it is eligible to use a Form S-3 registration statement, the Company receives a request from Holders of at least twenty percent (20%) of the Registrable Securities then outstanding that the Company file a Form
S-3 registration statement with respect to outstanding Registrable Securities of such Holders having an anticipated aggregate offering price, net of Selling Expenses, of at least $1 million, then the
Company shall (i) within ten (10) days after the date such request is given, give a Demand Notice to all Holders other than the Initiating Holders; and (ii) as soon as practicable, and in any event within forty-five (45) days
after the date such request is given by the Initiating Holders, file a Form S-3 registration statement under the Securities Act covering all Registrable Securities requested to be included in such registration
by any other Holders, as specified by notice given by each such Holder to the Company within twenty (20) days of the date the Demand Notice is given, and in each case, subject to the limitations of Subsection 2.1(c) and Subsection
2.3. 
 (c)    Notwithstanding the foregoing obligations, if the Company furnishes to Holders requesting a
registration pursuant to this Subsection 2.1 a certificate signed by the Company’s chief executive officer stating that in the good faith judgment of the Board it would be materially detrimental to the Company and its stockholders for
such registration statement to either become effective or remain effective for as long as such registration statement otherwise would be required to remain effective, because such action would (i) materially interfere with a significant
acquisition, corporate reorganization, or other similar transaction involving the Company; (ii) require premature disclosure of material information that the Company has a bona fide business purpose for preserving as confidential; or
(iii) render the Company unable to comply with requirements under the Securities Act or Exchange Act, then the Company shall have the right to defer taking action with respect to such filing, and any time periods with respect to filing or
effectiveness thereof shall be tolled correspondingly, for a period of not more than one hundred twenty (120) days after the request of the Initiating Holders is given; provided, however, that the Company may not invoke this right
more than once in any twelve (12) month period; and provided further that the Company shall not register any securities for its own account or that of any other stockholder during such one hundred twenty (120) day period.

 (d)    The Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to
Subsection 2.1(a)(i) during the period that is sixty (60) days 

  
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before the Company’s good faith estimate of the date of filing of, and ending on a date that is one hundred eighty (180) days after the effective date of, a Company-initiated
registration, provided, that the Company is actively employing in good faith commercially reasonable efforts to cause such registration statement to become effective; (ii) after the Company has effected two registrations pursuant to
Subsection 2.1(a); or (iii) if the Initiating Holders propose to dispose of shares of Registrable Securities that may be immediately registered on Form S-3 pursuant to a request made pursuant to
Subsection 2.1(b). The Company shall not be obligated to effect, or to take any action to effect, any registration pursuant to Subsection 2.1(b) (i) during the period that is thirty (30) days before the Company’s good
faith estimate of the date of filing of, and ending on a date that is ninety (90) days after the effective date of, a Company-initiated registration, provided, that the Company is actively employing in good faith commercially reasonable efforts
to cause such registration statement to become effective; or (ii) if the Company has effected one registration pursuant to Subsection 2.1(b) within the twelve (12) month period immediately preceding the date of such request. A
registration shall not be counted as “effected” for purposes of this Subsection 2.1(d) until such time as the applicable registration statement has been declared effective by the SEC, unless the Initiating Holders withdraw
their request for such registration, elect not to pay the registration expenses therefor, and forfeit their right to one demand registration statement pursuant to Subsection 2.6, in which case such withdrawn registration statement shall be
counted as “effected” for purposes of this Subsection 2.1(d). 
 2.2    Company
Registration. If the Company proposes to register (including, for this purpose, a registration effected by the Company for stockholders other than the Holders) any of its securities under the Securities Act in connection with the public offering
of such securities solely for cash (other than in an Excluded Registration), the Company shall, at such time, promptly give each Holder notice of such registration. Upon the request of each Holder given within twenty (20) days after such notice
is given by the Company, the Company shall, subject to the provisions of Subsection 2.3, cause to be registered all of the Registrable Securities that each such Holder has requested to be included in such registration. The Company shall have
the right to terminate or withdraw any registration initiated by it under this Subsection 2.2 before the effective date of such registration, whether or not any Holder has elected to include Registrable Securities in such registration. The
expenses (other than Selling Expenses) of such withdrawn registration shall be borne by the Company in accordance with Subsection 2.6. 

2.3    Underwriting Requirements. 

(a)    If, pursuant to Subsection 2.1, the Initiating Holders intend to distribute the Registrable Securities
covered by their request by means of an underwriting, they shall so advise the Company as a part of their request made pursuant to Subsection 2.1, and the Company shall include such information in the Demand Notice. The underwriter(s) will be
selected by the Company and shall be reasonably acceptable to a majority in interest of the Initiating Holders. In such event, the right of any Holder to include such Holder’s Registrable Securities in such registration shall be conditioned
upon such Holder’s participation in such underwriting and the inclusion of such Holder’s Registrable Securities in the underwriting to the extent provided herein. All Holders proposing to distribute their securities through such
underwriting shall (together with the Company as provided in Subsection 2.4(e)) enter into an underwriting agreement in customary form with the underwriter(s) selected for such underwriting. Notwithstanding any other provision of this
Subsection 2.3, if the managing 

  
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underwriter(s) advise(s) the Initiating Holders in writing that marketing factors require a limitation on the number of shares to be underwritten, then the Initiating Holders shall so advise all
Holders of Registrable Securities that otherwise would be underwritten pursuant hereto, and the number of Registrable Securities that may be included in the underwriting shall be allocated among such Holders of Registrable Securities, including the
Initiating Holders, in proportion (as nearly as practicable) to the number of Registrable Securities owned by each Holder or in such other proportion as shall mutually be agreed to by all such selling Holders; provided, however, that
the number of Registrable Securities held by the Holders to be included in such underwriting shall not be reduced unless all other securities are first entirely excluded from the underwriting. To facilitate the allocation of shares in accordance
with the above provisions, the Company or the underwriters may round the number of shares allocated to any Holder to the nearest 100 shares. 

(b) In connection with any offering involving an underwriting of shares of the Company’s capital stock pursuant to Subsection 2.2,
the Company shall not be required to include any of the Holders’ Registrable Securities in such underwriting unless the Holders accept the terms of the underwriting as agreed upon between the Company and its underwriters, and then only in such
quantity as the underwriters in their sole discretion determine will not jeopardize the success of the offering by the Company. If the total number of securities, including Registrable Securities, requested by stockholders to be included in such
offering exceeds the number of securities to be sold (other than by the Company) that the underwriters in their reasonable discretion determine is compatible with the success of the offering, then the Company shall be required to include in the
offering only that number of such securities, including Registrable Securities, which the underwriters and the Company in their sole discretion determine will not jeopardize the success of the offering. If the underwriters determine that less than
all of the Registrable Securities requested to be registered can be included in such offering, then the Registrable Securities that are included in such offering shall be allocated among the selling Holders in proportion (as nearly as practicable
to) the number of Registrable Securities owned by each selling Holder or in such other proportions as shall mutually be agreed to by all such selling Holders. To facilitate the allocation of shares in accordance with the above provisions, the
Company or the underwriters may round the number of shares allocated to any Holder to the nearest 100 shares. Notwithstanding the foregoing, in no event shall (i) the number of Registrable Securities included in the offering be reduced unless
all other securities (other than securities to be sold by the Company) are first entirely excluded from the offering, or (ii) the number of Registrable Securities included in the offering be reduced below fifteen percent (15%) of the total
number of securities included in such offering, unless such offering is the IPO, in which case the selling Holders may be excluded further if the underwriters make the determination described above and no other stockholder’s securities are
included in such offering. For purposes of the provision in this Subsection 2.3(b) concerning apportionment, for any selling Holder that is a partnership, limited liability company, or corporation, the partners, members, retired partners,
retired members, stockholders, and Affiliates of such Holder, or the estates and Immediate Family Members of any such partners, retired partners, members, and retired members and any trusts for the benefit of any of the foregoing Persons, shall be
deemed to be a single “selling Holder,” and any pro rata reduction with respect to such “selling Holder” shall be based upon the aggregate number of Registrable Securities owned by all Persons included in such
“selling Holder,” as defined in this sentence. 

  
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 (c)    For purposes of Subsection 2.1, a registration shall not
be counted as “effected” if, as a result of an exercise of the underwriter’s cutback provisions in Subsection 2.3(a), fewer than fifty percent (50%) of the total number of Registrable Securities that Holders have
requested to be included in such registration statement are actually included. 
 2.4    Obligations of the
Company. Whenever required under this Section 2 to effect the registration of any Registrable Securities, the Company shall, as expeditiously as reasonably possible: 

(a)    prepare and file with the SEC a registration statement with respect to such Registrable Securities and use its
commercially reasonable efforts to cause such registration statement to become effective and, upon the request of the Holders of at least a majority of the Registrable Securities registered thereunder, keep such registration statement effective for
a period of up to one hundred twenty (120) days or, if earlier, until the distribution contemplated in the registration statement has been completed; provided, however, that (i) such one hundred twenty (120) day period
shall be extended for a period of time equal to the period the Holder refrains, at the request of an underwriter of Common Stock (or other securities) of the Company, from selling any securities included in such registration, and (ii) in the
case of any registration of Registrable Securities on Form S-3 that are intended to be offered on a continuous or delayed basis, subject to compliance with applicable SEC rules, such one hundred twenty
(120) day period shall be extended for up to sixty (60) days, if necessary, to keep the registration statement effective until all such Registrable Securities are sold; 

(b)    prepare and file with the SEC such amendments and supplements to such registration statement, and the prospectus
used in connection with such registration statement, as may be necessary to comply with the Securities Act in order to enable the disposition of all securities covered by such registration statement; 

(c)    furnish to the selling Holders such numbers of copies of a prospectus, including a preliminary prospectus, as
required by the Securities Act, and such other documents as the Holders may reasonably request in order to facilitate their disposition of their Registrable Securities; 

(d)    use its commercially reasonable efforts to register and qualify the securities covered by such registration
statement under such other securities or blue-sky laws of such jurisdictions as shall be reasonably requested by the selling Holders; provided that the Company shall not be required to qualify to do
business or to file a general consent to service of process in any such states or jurisdictions, unless the Company is already subject to service in such jurisdiction and except as may be required by the Securities Act; 

(e)    in the event of any underwritten public offering, enter into and perform its obligations under an underwriting
agreement, in usual and customary form, with the underwriter(s) of such offering; 
 (f)    use its commercially
reasonable efforts to cause all such Registrable Securities covered by such registration statement to be listed on a national securities exchange or trading system and each securities exchange and trading system (if any) on which similar securities
issued by the Company are then listed; 

  
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 (g)    provide a transfer agent and registrar for all Registrable
Securities registered pursuant to this Agreement and provide a CUSIP number for all such Registrable Securities, in each case not later than the effective date of such registration; 

(h) promptly make available for inspection by the selling Holders, any managing underwriter(s) participating in any disposition pursuant to
such registration statement, and any attorney or accountant or other agent retained by any such underwriter or selected by the selling Holders, all financial and other records, pertinent corporate documents, and properties of the Company, and cause
the Company’s officers, directors, employees, and independent accountants to supply all information reasonably requested by any such seller, underwriter, attorney, accountant, or agent, in each case, as necessary or advisable to verify the
accuracy of the information in such registration statement and to conduct appropriate due diligence in connection therewith; 

(i)    notify each selling Holder, promptly after the Company receives notice thereof, of the time when such registration
statement has been declared effective or a supplement to any prospectus forming a part of such registration statement has been filed; and 

(j)    after such registration statement becomes effective, notify each selling Holder of any request by the SEC that the
Company amend or supplement such registration statement or prospectus. 
 In addition, the Company shall ensure that, at all times after any
registration statement covering a public offering of securities of the Company under the Securities Act shall have become effective, its insider trading policy shall provide that the Company’s directors may implement a trading program under
Rule 10b5-1 of the Exchange Act. 
 2.5    Furnish Information. It shall
be a condition precedent to the obligations of the Company to take any action pursuant to this Section 2 with respect to the Registrable Securities of any selling Holder that such Holder shall furnish to the Company such
information regarding itself, the Registrable Securities held by it, and the intended method of disposition of such securities as is reasonably required to effect the registration of such Holder’s Registrable Securities. 

2.6    Expenses of Registration. All expenses (other than Selling Expenses) incurred in connection with
registrations, filings, or qualifications pursuant to Section 2, including all registration, filing, and qualification fees; printers’ and accounting fees; fees and disbursements of counsel for the Company; and the
reasonable fees and disbursements, not to exceed $35,000, of one counsel for the selling Holders (“Selling Holder Counsel”), shall be borne and paid by the Company; provided, however, that the Company shall not be
required to pay for any expenses of any registration proceeding begun pursuant to Subsection 2.1 if the registration request is subsequently withdrawn at the request of the Holders of at least a majority of the Registrable Securities to be
registered (in which case all selling Holders shall bear such expenses pro rata based upon the number of Registrable Securities that were to be included in the 

  
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withdrawn registration), unless the Holders of at least a majority of the Registrable Securities agree to forfeit their right to one registration pursuant to Subsection 2.1(a) or
Subsection 2.1(b), as the case may be; provided further that if, at the time of such withdrawal, the Holders have learned of a material adverse change in the condition, business, or prospects of the Company from that known to the
Holders at the time of their request and have withdrawn the request with reasonable promptness after learning of such information, then the Holders shall not be required to pay any of such expenses and shall not forfeit their right to one
registration pursuant to Subsection 2.1(a) or Subsection 2.1(b). All Selling Expenses relating to Registrable Securities registered pursuant to this Section 2 shall be borne and paid by the Holders pro rata on
the basis of the number of Registrable Securities registered on their behalf. 
 2.7    Delay of Registration. No
Holder shall have any right to obtain or seek an injunction restraining or otherwise delaying any registration pursuant to this Agreement as the result of any controversy that might arise with respect to the interpretation or implementation of this
Section 2. 
 2.8    Indemnification. If any Registrable Securities are included in a
registration statement: 
 (a)    To the extent permitted by law, the Company will indemnify and hold harmless each
selling Holder, and the partners, members, officers, directors, and stockholders of each such Holder; legal counsel and accountants for each such Holder; any underwriter (as defined in the Securities Act) for each such Holder; and each Person, if
any, who controls such Holder or underwriter within the meaning of the Securities Act or the Exchange Act, against any Damages, and the Company will pay to each such Holder, underwriter, controlling Person, or other aforementioned Person any legal
or other expenses reasonably incurred thereby in connection with investigating or defending any claim or proceeding from which Damages may result, as such expenses are incurred; provided, however, that the indemnity agreement contained in this
Subsection 2.8(a) shall not apply to amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent of the Company, which consent shall not be unreasonably withheld, nor shall the Company be
liable for any Damages to the extent that they arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on behalf of any such Holder, underwriter, controlling Person, or
other aforementioned Person expressly for use in connection with such registration. 
 (b)    To the extent permitted by
law, each selling Holder, severally and not jointly, will indemnify and hold harmless the Company, and each of its directors, each of its officers who has signed the registration statement, each Person (if any), who controls the Company within the
meaning of the Securities Act, legal counsel and accountants for the Company, any underwriter (as defined in the Securities Act), any other Holder selling securities in such registration statement, and any controlling Person of any such underwriter
or other Holder, against any Damages, in each case only to the extent that such Damages arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on behalf of such selling
Holder expressly for use in connection with such registration; and each such selling Holder will pay to the Company and each other aforementioned Person any legal or other expenses reasonably incurred thereby in connection

  
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with investigating or defending any claim or proceeding from which Damages may result, as such expenses are incurred; provided, however, that the indemnity agreement contained in
this Subsection 2.8(b) shall not apply to amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent of the Holder, which consent shall not be unreasonably withheld; and provided
further that in no event shall the aggregate amounts payable by any Holder by way of indemnity or contribution under Subsections 2.8(b) and 2.8(d) exceed the proceeds from the offering received by such Holder (net of any Selling
Expenses paid by such Holder), except in the case of fraud or willful misconduct by such Holder. 
 (c)    Promptly
after receipt by an indemnified party under this Subsection 2.8 of notice of the commencement of any action (including any governmental action) for which a party may be entitled to indemnification hereunder, such indemnified party will, if a
claim in respect thereof is to be made against any indemnifying party under this Subsection 2.8, give the indemnifying party notice of the commencement thereof. The indemnifying party shall have the right to participate in such action and, to
the extent the indemnifying party so desires, participate jointly with any other indemnifying party to which notice has been given, and to assume the defense thereof with counsel mutually satisfactory to the parties; provided, however,
that an indemnified party (together with all other indemnified parties that may be represented without conflict by one counsel) shall have the right to retain one separate counsel, with the fees and expenses to be paid by the indemnifying party, if
representation of such indemnified party by the counsel retained by the indemnifying party would be inappropriate due to actual or potential differing interests between such indemnified party and any other party represented by such counsel in such
action. The failure to give notice to the indemnifying party within a reasonable time of the commencement of any such action shall relieve such indemnifying party of any liability to the indemnified party under this Subsection 2.8, to the
extent that such failure actually and materially prejudices the indemnifying party’s ability to defend such action. The failure to give notice to the indemnifying party will not relieve it of any liability that it may have to any indemnified
party otherwise than under this Subsection 2.8. 
 (d)    To provide for just and equitable contribution to joint
liability under the Securities Act in any case in which either (i) any party otherwise entitled to indemnification hereunder makes a claim for indemnification pursuant to this Subsection 2.8 but it is judicially determined (by the entry
of a final judgment or decree by a court of competent jurisdiction and the expiration of time to appeal or the denial of the last right of appeal) that such indemnification may not be enforced in such case, notwithstanding the fact that this
Subsection 2.8 provides for indemnification in such case, or (ii) contribution under the Securities Act may be required on the part of any party hereto for which indemnification is provided under this Subsection 2.8, then, and in
each such case, such parties will contribute to the aggregate losses, claims, damages, liabilities, or expenses to which they may be subject (after contribution from others) in such proportion as is appropriate to reflect the relative fault of each
of the indemnifying party and the indemnified party in connection with the statements, omissions, or other actions that resulted in such loss, claim, damage, liability, or expense, as well as to reflect any other relevant equitable considerations.
The relative fault of the indemnifying party and of the indemnified party shall be determined by reference to, among other things, whether the untrue or allegedly untrue statement of a material fact, or the omission or alleged omission of a material
fact, relates to information supplied by the indemnifying party or by the indemnified 

  
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party and the parties’ relative intent, knowledge, access to information, and opportunity to correct or prevent such statement or omission; provided, however, that, in any such
case, (x) no Holder will be required to contribute any amount in excess of the public offering price of all such Registrable Securities offered and sold by such Holder pursuant to such registration statement, and (y) no Person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) will be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation; and provided further that in no event
shall a Holder’s liability pursuant to this Subsection 2.8(d), when combined with the amounts paid or payable by such Holder pursuant to Subsection 2.8(b), exceed the proceeds from the offering received by such Holder (net of any
Selling Expenses paid by such Holder), except in the case of willful misconduct or fraud by such Holder. 

(e)    Notwithstanding the foregoing, to the extent that the provisions on indemnification and contribution contained in
the underwriting agreement entered into in connection with the underwritten public offering are in conflict with the foregoing provisions, the provisions in the underwriting agreement shall control. 

(f)    Unless otherwise superseded by an underwriting agreement entered into in connection with the underwritten public
offering, the obligations of the Company and Holders under this Subsection 2.8 shall survive the completion of any offering of Registrable Securities in a registration under this Section 2, and otherwise shall
survive the termination of this Agreement. 
 2.9    Reports Under Exchange Act. With a view to making available
to the Holders the benefits of SEC Rule 144 and any other rule or regulation of the SEC that may at any time permit a Holder to sell securities of the Company to the public without registration or pursuant to a registration on Form S-3, the Company shall: 
 (a)    make and keep available adequate current public
information, as those terms are understood and defined in SEC Rule 144, at all times after the effective date of the registration statement filed by the Company for the IPO; 

(b)    use commercially reasonable efforts to file with the SEC in a timely manner all reports and other documents
required of the Company under the Securities Act and the Exchange Act (at any time after the Company has become subject to such reporting requirements); and 

(c)    furnish to any Holder, so long as the Holder owns any Registrable Securities, forthwith upon request (i) to
the extent accurate, a written statement by the Company that it has complied with the reporting requirements of SEC Rule 144 (at any time after ninety (90) days after the effective date of the registration statement filed by the Company for the
IPO), the Securities Act, and the Exchange Act (at any time after the Company has become subject to such reporting requirements), or that it qualifies as a registrant whose securities may be resold pursuant to Form
S-3 (at any time after the Company so qualifies); (ii) a copy of the most recent annual or quarterly report of the Company and such other reports and documents so filed by the Company; and (iii) such
other information as may be reasonably requested in availing any Holder of any rule or regulation of the SEC that permits the selling of any such securities without registration (at any time after the Company has become subject to the reporting
requirements under the Exchange Act) or pursuant to Form S-3 (at any time after the Company so qualifies to use such form). 

  
 12 

 2.10    Limitations on Subsequent Registration Rights. From and
after the date of this Agreement, the Company shall not, without the prior written consent of the Holders of at least a majority of the Registrable Securities then outstanding, enter into any agreement with any holder or prospective holder of any
securities of the Company that would allow such holder or prospective holder (i) to include such securities in any registration unless, under the terms of such agreement, such holder or prospective holder may include such securities in any such
registration only to the extent that the inclusion of such securities will not reduce the number of Registrable Securities of the Holders that are included or (ii) to demand registration of any securities held by such holder or prospective
holder; provided that this limitation shall not apply to any additional Investor who becomes a party to this Agreement in accordance with Subsection 6.9. 

2.11    “Market Stand-off” Agreement. Each
Holder hereby agrees that it will not, without the prior written consent of the managing underwriter, during the period commencing on the date of the final prospectus relating to the IPO and ending on the date specified by the Company and the
managing underwriter (such period not to exceed one hundred eighty (180) days, or such other period as may be requested by the Company or an underwriter to accommodate regulatory restrictions on (1) the publication or other distribution of
research reports, and (2) analyst recommendations and opinions, including, but not limited to, the restrictions contained in FINRA Rule 2711(f)(4) or NYSE Rule 472(f)(4), or any successor provisions or amendments thereto), (i) lend; offer;
pledge; sell; contract to sell; sell any option or contract to purchase; purchase any option or contract to sell; grant any option, right, or warrant to purchase; or otherwise transfer or dispose of, directly or indirectly, any shares of Common
Stock or any securities convertible into or exercisable or exchangeable (directly or indirectly) for Common Stock (whether such shares or any such securities are then owned by the Holder or are thereafter acquired) or (ii) enter into any swap
or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of such securities, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Common
Stock or other securities, in cash, or otherwise. The foregoing provisions of this Subsection 2.11 shall apply only to the IPO, shall not apply to the sale of any shares to an underwriter pursuant to an underwriting agreement, or the transfer
of any shares to any trust for the direct or indirect benefit of the Holder or the immediate family of the Holder, provided that the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, and provided further
that any such transfer shall not involve a disposition for value, and shall be applicable to the Holders only if all officers, directors and stockholders individually owning more than one percent (1%) of the Company’s outstanding Common Stock
(after giving effect to conversion into Common Stock of all outstanding Preferred Stock) are subject to the same restrictions. The underwriters in connection with such registration are intended third-party beneficiaries of this Subsection
2.11 and shall have the right, power, and authority to enforce the provisions hereof as though they were a party hereto. Each Holder further agrees to execute such agreements as may be reasonably requested by the underwriters in connection with
such registration that are consistent with this Subsection 2.11 or that are necessary to give further effect thereto. Any discretionary waiver or termination of the restrictions of any or all such agreements by the Company or underwriters
shall apply pro rata to all Holders subject to such agreements, based on the number of shares subject to such agreements. 

  
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 2.12    Restrictions on Transfer. 

(a)    The Preferred Stock and the Registrable Securities shall not be sold, pledged, or otherwise transferred, and the
Company shall not recognize and shall issue stop-transfer instructions to its transfer agent with respect to any such sale, pledge, or transfer, except upon the conditions specified in this Agreement, which conditions are intended to ensure
compliance with the provisions of the Securities Act. A transferring Holder will cause any proposed purchaser, pledgee, or transferee of the Preferred Stock and the Registrable Securities held by such Holder to agree to take and hold such securities
subject to the provisions and upon the conditions specified in this Agreement. 
 (b)    Each certificate or instrument
representing (i) the Preferred Stock, (ii) the Registrable Securities, and (iii) any other securities issued in respect of the securities referenced in clauses (i) and (ii), upon any stock split, stock dividend, recapitalization,
merger, consolidation, or similar event, shall (unless otherwise permitted by the provisions of Subsection 2.12(c)) be stamped or otherwise imprinted with a legend substantially in the following form: 

THE SECURITIES REPRESENTED HEREBY HAVE BEEN ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED.
SUCH SHARES MAY NOT BE SOLD, PLEDGED, OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR A VALID EXEMPTION FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF SAID ACT. 

THE SECURITIES REPRESENTED HEREBY MAY BE TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT BETWEEN THE COMPANY AND THE STOCKHOLDER,
A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY. 
 The Holders consent to the Company making a notation in its records and giving instructions
to any transfer agent of the Restricted Securities in order to implement the restrictions on transfer set forth in this Subsection 2.12. 

(c)    The holder of each certificate representing Restricted Securities, by acceptance thereof, agrees to comply in all
respects with the provisions of this Section 2. Before any proposed sale, pledge, or transfer of any Restricted Securities, unless there is in effect a registration statement under the Securities Act covering the proposed
transaction, the Holder thereof shall give notice to the Company of such Holder’s intention to effect such sale, pledge, or transfer. Each such notice shall describe the manner and circumstances of the proposed sale, pledge, or transfer in
sufficient detail and, if reasonably requested by the Company, shall be accompanied at such Holder’s expense by either (i) a written opinion of legal counsel who shall, and whose legal opinion shall, be reasonably satisfactory to the
Company, addressed to the Company, to the effect that the proposed transaction may be effected without registration under the Securities Act; (ii) a “no action” letter from the SEC to the effect that the proposed sale,

  
 14 

 
pledge, or transfer of such Restricted Securities without registration will not result in a recommendation by the staff of the SEC that action be taken with respect thereto; or (iii) any
other evidence reasonably satisfactory to counsel to the Company to the effect that the proposed sale, pledge, or transfer of the Restricted Securities may be effected without registration under the Securities Act, whereupon the Holder of such
Restricted Securities shall be entitled to sell, pledge, or transfer such Restricted Securities in accordance with the terms of the notice given by the Holder to the Company. The Company will not require such a legal opinion or “no
action” letter (x) in any transaction in compliance with SEC Rule 144 or (y) in any transaction in which such Holder distributes Restricted Securities to an Affiliate of such Holder for noconsideration; provided that each
transferee agrees in writing to be subject to the terms of this Subsection 2.12. Each certificate or instrument evidencing the Restricted Securities transferred as above provided shall bear, except if such transfer is made pursuant to SEC Rule 144,
the appropriate restrictive legend set forth in Subsection 2.12(b), except that such certificate shall not bear such restrictive legend if, in the opinion of counsel for such Holder and the Company, such legend is not required in order to
establish compliance with any provisions of the Securities Act. 
 2.13    Termination of Registration Rights. The
right of any Holder to request registration or inclusion of Registrable Securities in any registration pursuant to Subsection 2.1 or Subsection 2.2 shall terminate upon the earliest to occur of: 

(a)    the closing of a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation; 

(b) such time as Rule 144 or another similar exemption under the Securities Act is available for the sale of all of such Holder’s shares
without limitation during a three-month period without registration; and 
 (c)    the fifth anniversary of the IPO.

 3.    Information Rights. 

3.1    Delivery of Financial Statements. The Company shall deliver to each Major Investor: 

(a) as soon as practicable, but in any event within ninety (90) days after the end of each fiscal year of the Company, (i) a balance
sheet as of the end of such year, (ii) statements of income and of cash flows for such year, and (iii) a statement of stockholders’ equity as of the end of such year. Unless otherwise waived in writing by Iconiq Strategic Partners II,
L.P. (“ICONIQ”), OpenView Venture Partners III, L.P. (“OpenView”), Index Ventures VI (Jersey), L.P (“Index Ventures”) and ru-Net Technology Capital LP
(“RTP Ventures”), all such financial statements shall be audited and certified by independent public accountants approved by the Board, including a majority of the Preferred Directors; 

(b) as soon as practicable, but in any event within forty-five (45) days after the end of each of the first three (3) quarters of
each fiscal year of the Company, unaudited statements of income and of cash flows for each such fiscal quarter, and an unaudited balance sheet and a statement of stockholders’ equity as of the end of such fiscal quarter, all prepared in
accordance with GAAP (except that such financial statements may (i) be subject to normal year-end audit adjustments and (ii) not contain all notes thereto that may be required in accordance with GAAP); 

  
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 (c) upon request, copies of the most recent budget and business plan for the Company
(collectively, the “Budget”) approved by the Board, including a majority of the Preferred Directors; and 

(d)    such other information relating to the financial condition, business, prospects, or corporate affairs of the
Company as any Major Investor may from time to time reasonably request; provided, however, that the Company shall not be obligated under this Subsection 3.1 to provide information (i) that the Company reasonably determines
in good faith to be a trade secret or confidential information (unless covered by an enforceable confidentiality agreement, in form acceptable to the Company) or (ii) the disclosure of which would adversely affect the attorney-client privilege
between the Company and its counsel. 
 If, for any period, the Company has any subsidiary whose accounts are consolidated with those of the
Company, then in respect of such period the financial statements delivered pursuant to the foregoing sections shall be the consolidated and consolidating financial statements of the Company and all such consolidated subsidiaries. 

Notwithstanding anything else in this Subsection 3.1 to the contrary, the Company may cease providing the information set forth in this
Subsection 3.1 during the period starting with the date sixty (60) days before the Company’s good-faith estimate of the date of filing of a registration statement if it reasonably concludes it must do so to comply with the SEC rules
applicable to such registration statement and related offering; provided that the Company’s covenants under this Subsection 3.1 shall be reinstated at such time as the Company is no longer actively employing its commercially reasonable
efforts to cause such registration statement to become effective. 
 3.2    Inspection. The Company shall permit
each Major Investor (provided that the Board has not reasonably determined that such Major Investor is a competitor of the Company), at such Major Investor’s expense, to visit and inspect the Company’s properties; examine its books of
account and records; and discuss the Company’s affairs, finances, and accounts with its officers, during normal business hours of the Company as may be reasonably requested by the Major Investor; provided, however, that the
Company shall not be obligated pursuant to this Subsection 3.2 to provide access to any information that it reasonably and in good faith considers to be a trade secret or confidential information (unless covered by an enforceable
confidentiality agreement, in form acceptable to the Company) or the disclosure of which would adversely affect the attorney-client privilege between the Company and its counsel. 

3.3    Board Observer Right. For so long as ICONIQ owns at least 500,000 shares of Series D Preferred Stock (or an
equivalent amount of Common Stock issued upon conversion thereof) ( subject to appropriate adjustment in the event of any stock split, stock dividend, combination, or other recapitalization or reclassification effected after the date hereof), the
Company shall invite a representative of ICONIQ to attend all meetings of the Board in a nonvoting observer capacity and, in this respect, shall give such representative copies of all notices, minutes, consents, and other materials that it provides
to its directors at the same time 

  
 16 

 
and in the same manner as provided to such directors; provided, however, that such representative shall agree to hold in confidence and trust and to act in a fiduciary manner with
respect to all information so provided; and provided further, that the Company reserves the right to withhold any information and to exclude such representative from any meeting or portion thereof if access to such information or attendance
at such meeting could adversely affect the attorney-client privilege between the Company and its counsel or result in disclosure of trade secrets or a conflict of interest. 

3.4    Additional Information Rights. The Company shall deliver to ICONIQ, OpenView, Index Ventures, and RTP
Ventures: 
 (a) as soon as practicable, but in any event within twenty-one (21) days after the
end of each calendar quarter, to ICONIQ’s, OpenView’s, Index Ventures’, and RTP Ventures’ satisfaction, all the information requested on the Metric Schedule substantially in the form attached hereto as Exhibit B. The completed
schedule shall be sent to Index Ventures via email, with confirmation of receipt to reporting@indexventures.com or by any other reasonable method as hereafter specified by Index Ventures. 

(b)    as soon as practicable, but in any event within twenty-one (21) days
after the end of each calendar year, a detailed share capitalization table on a fully diluted basis, as of December 31 of the just completed calendar year, setting out the authorized and issued share capital of the Company on a shareholder by
shareholder basis, together with details of any unexercised and unvested options and detailing any share transfers since the delivery of the previous share capitalization table, if any. 

3.5    Termination of Information Rights. The covenants set forth in Subsections 3.1, 3.2,
3.3, and 3.4 shall terminate and be of no further force or effect (i) immediately before the consummation of the IPO, or (ii) when the Company first becomes subject to the periodic reporting requirements of Section 12(g)
or 15(d) of the Exchange Act, or (iii) upon a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation, whichever event occurs first. 

3.6    Confidentiality. Each Investor agrees that such Investor will keep confidential and will not disclose,
divulge, or use for any purpose (other than to monitor its investment in the Company) any confidential information obtained from the Company pursuant to the terms of this Agreement (including notice of the Company’s intention to file a
registration statement), unless such confidential information (a) is known or becomes known to the public in general (other than as a result of a breach of this Subsection 3.6 by such Investor), (b) is or has been independently developed
or conceived by the Investor without use of the Company’s confidential information, (c) is or has been made known or disclosed to the Investor by a third party without a breach of any obligation of confidentiality such third party may have
to the Company, (d) was in the possession of or known by such Investor without restriction prior to receipt from the Company, or (e) is required to be disclosed by a governmental authority, stock market or stock exchange; provided,
however, that an Investor may disclose confidential information (i) to its attorneys, accountants, consultants, and other professionals to the extent necessary to obtain their services in connection with monitoring its investment in the
Company; (ii) to any prospective purchaser of any Registrable Securities from such Investor, if such 

  
 17 

 
prospective purchaser agrees to be bound by the provisions of this Subsection 3.6; (iii) to any existing Affiliate, partner, member, former partner or member who retained an economic
interest in such Investor, stockholder, prospective investor or limited partner or wholly owned subsidiary of such Investor in the ordinary course of business (or any employee or representative of any of the foregoing) (each of the foregoing
persons, a “Permitted Disclosee”), provided that such Investor informs such Person that such information is confidential and directs such Person to maintain the confidentiality of such information; or (iv) as may
otherwise be required by law, rule, regulation or court or other governmental order, provided that the Investor promptly notifies the Company of such disclosure and takes reasonable steps to minimize the extent of any such required
disclosure. Furthermore, nothing contained herein shall prevent the Investors, individually or together, or any Permitted Disclosee from entering into any business, entering into any agreement with a third party, or investing in or engaging in
investment discussions with any other company (whether or not competitive with the Company), provided that such Investor or the Permitted Disclosee does not, except as permitted in accordance with this Subsection 3.6, disclose or otherwise
make use of any proprietary or confidential information of the Company in connection with such activities. 

3.7    Termination of Seed Preferred Stock Board Observer Rights. Each of the undersigned Investors other than
ICONIQ, OpenView, Index Ventures and RTP Ventures hereby agrees that, regardless of what is set forth in any management rights letter or other side letter or agreement between the Company and such Investor, such Investor shall not have the right to
attend and observe Board meetings of the Company other than at the invitation of and as approved by the Board, including a majority of the Preferred Directors, in its discretion. Other than as amended by the foregoing sentence, the terms of any such
management rights letters shall remain in full force and effect. 
 4.    Rights to Future Stock Issuances. 

4.1    Right of First Offer. Subject to the terms and conditions of this Subsection 4.1 and applicable
securities laws, if the Company proposes to offer or sell any New Securities, the Company shall first offer such New Securities to each Major Investor. A Major Investor shall be entitled to apportion the right of first offer hereby granted to it
among itself and its Affiliates in such proportions as it deems appropriate. 
 (a) The Company shall give notice (the “Offer
Notice”) to each Major Investor, stating (i) its bona fide intention to offer such New Securities, (ii) the number of such New Securities to be offered, and (iii) the price and terms, if any, upon which it proposes to offer
such New Securities. 
 (b)    By notification to the Company within twenty (20) days after the Offer Notice is
given, each Major Investor may elect to purchase or otherwise acquire, at the price and on the terms specified in the Offer Notice, up to that portion of such New Securities which equals the product of (x) the aggregate number of New
Securities, times, (y) a fraction, the numerator of which is the aggregate number of the Conversion Shares held by such Major Investor and the denominator of which is the total number of shares of Common Stock of the Company then issued and
outstanding (assuming full conversion and/or exercise, as applicable, of all outstanding shares of Preferred Stock and other Derivative Securities). At the expiration of 

  
 18 

 
such twenty (20) day period, the Company shall promptly notify each Major Investor that elects to purchase or acquire all the shares available to it (each, a “Fully Exercising
Investor”) of any other Major Investor’s failure to do likewise. During the twenty (20) day period commencing after the Company has given such notice, each Fully Exercising Investor may, by giving notice to the Company, elect to
purchase or acquire, in addition to the number of shares specified above, up to that portion of the New Securities for which Major Investors were entitled to subscribe but that were not subscribed for by the Major Investors which is equal to the
product of (x) the aggregate number of New Securities for which Major Investors were entitled to subscribe but that were not subscribed for by the Major Investors, times, (y) a fraction, the numerator of which is the aggregate number of
Conversion Shares then held by such Fully Exercising Investor and the denominator of which is the total number of Conversion Shares held by all Fully Exercising Investors who wish to purchase such unsubscribed shares. The closing of any sale
pursuant to this Subsection 4.1(b) shall occur within the later of ninety (90) days of the date that the Offer Notice is given and the date of initial sale of New Securities pursuant to Subsection 4.1(c). 

(c)    If all New Securities referred to in the Offer Notice are not elected to be purchased or acquired as provided in
Subsection 4.1(b), the Company may, during the ninety (90) day period following the expiration of the periods provided in Subsection 4.1(b), offer and sell the remaining unsubscribed portion of such New Securities to any Person or
Persons at a price not less than, and upon terms no more favorable to the offeree than, those specified in the Offer Notice. If the Company does not enter into an agreement for the sale of the New Securities within such period, or if such agreement
is not consummated within thirty (30) days of the execution thereof, the right provided hereunder shall be deemed to be revived and such New Securities shall not be offered unless first reoffered to the Major Investors in accordance with this
Subsection 4.1. 
 (d)    The right of first offer in this Subsection 4.1 shall not be applicable to
(i) Exempted Securities (as defined in the Certificate of Incorporation); and (ii) shares of Common Stock issued in the IPO. 

(e)    Notwithstanding any provision hereof to the contrary, in lieu of complying with the provisions of this
Subsection 4.1, the Company may elect to give notice to the Major Investors within thirty (30) days after the issuance of New Securities. Such notice shall describe the type, price, and terms of the New Securities. Each Major Investor
shall have twenty (20) days from the date notice is given to elect to purchase up to the number of New Securities that would, if purchased by such Major Investor, maintain such Major Investor’s percentage-ownership position, calculated as
set forth in Subsection 4.1(b) before giving effect to the issuance of such New Securities. The closing of such sale shall occur within sixty (60) days of the date notice is given to the Major Investors. 

4.2    Termination. The covenants set forth in Subsection 4.1 shall terminate and be of no further force or
effect (i) immediately before the consummation of the IPO, (ii) when the Company first becomes subject to the periodic reporting requirements of Section 12(g) or 15(d) of the Exchange Act, or (iii) upon a Deemed Liquidation
Event, as such term is defined in the Certificate of Incorporation, whichever event occurs first. 

  
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 5.    Additional Covenants. 

5.1    D&O Insurance. The Company shall use its commercially reasonable efforts to cause Directors and Officers
liability insurance, in an amount not less than $1,000,000 and on terms and conditions satisfactory to the Board, including a majority of the Preferred Directors, to be maintained until such time as the Board, including a majority of the Preferred
Directors, determines that such insurance should be discontinued. 
 5.2    Employee Agreements. The Company will
cause each Key Employee that has not already done so to enter into a noncompetition, nonsolicitation, nondisclosure and proprietary rights assignment agreement with a one (1) year noncompetition and nonsolicitation period, substantially in the
form attached hereto as Exhibit A-1. The Company will cause each employee that is not a Key Employee and that has not already done so to enter into a nonsolicitation, nondisclosure and proprietary
rights assignment agreement with a one (1) year nonsolicitation period, substantially in the form attached hereto as Exhibit A-2. In addition, the Company shall not amend, modify, terminate, waive,
or otherwise alter, in whole or in part, any of the above-referenced agreements or any restricted stock agreement between the Company and any employee, without the consent of the Board. 

5.3    Employee Stock. Unless otherwise approved by the Board, including a majority of the Preferred Directors, all
future employees and consultants of the Company who purchase, receive options to purchase, or receive awards of shares of the Company’s capital stock, and any other Person who purchases, receives options to purchase, or receives awards of
shares of the Company’s capital stock pursuant to the Company’s 2012 Equity Incentive Plan or any other equity incentive plan approved by the Board, after the date hereof shall be required to execute restricted stock or option agreements,
as applicable, providing for (i) vesting of shares over a four (4) year period, with the first twenty-five percent (25%) of such shares vesting following twelve (12) months of continued employment or service, and the remaining shares
vesting in equal monthly installments over the following thirty-six (36) months, and (ii) a market stand-off provision substantially similar to that in
Subsection 2.11. In addition, unless otherwise approved by the Board, including a majority of the Preferred Directors, the Company shall retain a “right of first refusal” on employee transfers until the Company’s IPO and shall
have the right to repurchase unvested shares at cost upon termination of employment of a holder of restricted stock. The Company will not accelerate any such vesting or allow any such repurchase right to expire without the approval of the Board,
including a majority of the Preferred Directors. 
 5.4    Qualified Small Business Stock. The Company shall
submit to its stockholders (including the Investors) and to the Internal Revenue Service any reports that may be required under Section 1202(d)(1)(C) of the Internal Revenue Code (the “Code”) and the regulations promulgated
thereunder. In addition, within twenty (20) business days after any Investor’s written request therefor, the Company shall, at its option, either (i) deliver to such Investor a written statement indicating whether (and what portion
of) such Investor’s interest in the Company constitutes “qualified small business stock” as defined in Section 1202(c) of the Code or (ii) deliver to such Investor such factual information in the Company’s possession as
is reasonably necessary to enable such Investor to determine whether (and what portion of) such Investor’s interest in the Company constitutes “qualified small business stock” as defined in Section 1202(c) of the Code. 

  
 20 

 5.5    Matters Requiring Investor Director Approval. So long as
there are issued and outstanding collectively at least 1,800,000 shares of Series D Preferred Stock, Series C Preferred Stock, Series B Preferred Stock, and/or Series A Preferred Stock (subject to appropriate adjustment in the event of any stock
dividend, stock split, combination or other similar recapitalization with respect to the Series D Preferred Stock, Series C Preferred Stock, Series B Preferred Stock, or Series A Preferred Stock, as applicable), the Company hereby covenants and
agrees with each of the Investors that it shall not, without approval of the Board, which approval must include the affirmative vote of a majority of the Preferred Directors: 

(a)    make, or permit any subsidiary to make, any loan or advance to, or own any stock or other securities of, any
subsidiary or other corporation, partnership, or other entity unless it is wholly owned by the Company; 
 (b)    make,
or permit any subsidiary to make, any loan or advance to any Person, including, without limitation, any employee or director of the Company or any subsidiary, except short-term loans of less than $25,000 (e.g., for employee hardship), advances and
similar expenditures in the ordinary course of business or under the terms of an employee stock or option plan approved by the Board; 

(c)    guarantee, directly or indirectly, or permit any subsidiary to guarantee, directly or indirectly, any indebtedness
except for trade accounts of the Company or any subsidiary arising in the ordinary course of business; 
 (d)    make
any investment inconsistent with any investment policy approved by the Board; 
 (e)    incur any aggregate indebtedness
in excess of $500,000 that is not already included in a budget approved by the Board, other than trade credit incurred in the ordinary course of business; 

(f) otherwise enter into or be a party to any transaction with any director, officer, or employee of the Company or any “associate”
(as defined in Rule 12b-2 promulgated under the Exchange Act) of any such Person, including without limitation any “management bonus” or similar plan providing payments to employees in connection
with a Deemed Liquidation Event as such term is defined in the Certificate of Incorporation, except for transactions contemplated by this Agreement, the Purchase Agreement and other transaction documents; 

(g)    hire, terminate, or change the compensation of the executive officers, including approving any option grants or
stock awards to executive officers; 
 (h)    change the principal business of the Company, enter new lines of business,
or exit the current line of business; 
 (i)    sell, assign, license, pledge, or encumber material technology or
intellectual property, other than licenses granted in the ordinary course of business; 

  
 21 

 (j) enter into any corporate strategic relationship outside of the ordinary course of the
Company’s business involving the payment, contribution, or assignment by the Company or to the Company of any assets; 

(k)    engage in any transaction with any Affiliate, other than on an arms-length basis; 

(l)    materially deviate from annual operating budgets and business plans; or 

(m)    enter into any agreement to do any of the foregoing. 

In addition, the Company shall prepare and present to Board in a timely manner before the end of each fiscal year the Budget for the next
fiscal year, which Budget must be approved by the Board, including a majority of the Preferred Directors. 

5.6    Board Matters. Unless otherwise determined by the vote of a majority of the directors then in office,
including a majority of the Preferred Directors, the Board shall meet at least quarterly in accordance with an agreed-upon schedule. The Company shall reimburse the nonemployee directors for all reasonable out-of-pocket travel expenses incurred (consistent with the Company’s travel policy) in connection with attending meetings of the Board. 

5.7    Successor Indemnification. If the Company or any of its successors or assignees consolidates with or merges
into any other Person and is not the continuing or surviving corporation or entity of such consolidation or merger, then to the extent necessary, proper provision shall be made so that successors and assignees of the Company assume the obligations
of the Company with respect to indemnification of members of the Board as in effect immediately before such transaction, whether such obligations are contained in the Company’s Bylaws, its Certificate of Incorporation, or elsewhere, as the case
may be. 
 5.8    Termination of Covenants. The covenants set forth in this Section 5
shall terminate and be of no further force or effect (i) immediately before the consummation of the IPO; (ii) when the Company first becomes subject to the periodic reporting requirements of Section 12(g) or 15(d) of the Exchange Act,
or (iii) upon a Deemed Liquidation Event, as such term is defined in the Certificate of Incorporation, whichever event occurs first. 

6.    Miscellaneous. 

6.1    Successors and Assigns. 

(a)    Except as otherwise provided with respect to Amplify in Subsection 6.1(b), the rights under this Agreement
may be assigned (but only with all related obligations) by a Holder to a transferee of Registrable Securities that (i) is an Affiliate of a Holder; (ii) is a Holder’s Immediate Family Member or trust for the benefit of an individual
Holder or one or more of such Holder’s Immediate Family Members; or (iii) after such transfer, holds at least 10,000 shares of Registrable Securities (subject to appropriate adjustment for stock splits, stock dividends, combinations, and
other recapitalizations); provided, however, that (x) the Company is, within a reasonable time after such transfer, furnished with written notice of the 

  
 22 

 
name and address of such transferee and the Registrable Securities with respect to which such rights are being transferred; and (y) such transferee agrees in a written instrument delivered
to the Company to be bound by and subject to the terms and conditions of this Agreement, including the provisions of Subsection 2.11. For the purposes of determining the number of shares of Registrable Securities held by a transferee, the
holdings of a transferee (1) that is an Affiliate or stockholder of a Holder; (2) who is a Holder’s Immediate Family Member; or (3) that is a trust for the benefit of an individual Holder or such Holder’s Immediate Family
Member shall be aggregated together and with those of the transferring Holder; provided further that all transferees who would not qualify individually for assignment of rights shall have a single attorney-in-fact for the purpose of exercising any rights, receiving notices, or taking any action under this Agreement. 

(b) For so long as Amplify Partners, L.P., individually or together with its Affiliates (collectively, “Amplify”) is a Major
Investor, Amplify shall be free to assign to Battery Ventures IX, L.P., and/or an Affiliate thereof (collectively, “Battery”), in whole or in part, without the consent of the Company but subject to the terms of this Subsection
6.1(b), Amplify’s rights and obligations under Subsection 4.1 with respect to any offer or issuance by the Company of New Securities (a “First Offer Assignment”). In no event, however, shall the Company be obligated
to provide any notice directly to Battery of any offer or issuance of New Securities. In order to exercise its First Offer Assignment right, Amplify must give the Company written notice of the First Offer Assignment within 10 days after the
applicable Offer Notice is given (or within 10 days after notice is given by the Company if proceeding pursuant to Subsection 4.1(e)). Immediately upon such notice by Amplify: (i) the First Offer Assignment shall be deemed to be
irrevocable and the Company shall be entitled to deal exclusively with Battery with respect to the applicable offering and/or issuance of New Securities (to the extent of the First Offer Assignment) and (ii) the Company shall be under no
obligation to provide any further notices to Amplify under Subsection 4.1(b) or otherwise with respect to the applicable offering and/or issuance of New Securities (if such First Offer Assignment is made with respect to the entire offer). The
Company shall have no liability with respect to, and Amplify hereby waives, releases and agrees not to sue for, any direct or indirect damages suffered by Amplify in connection with, arising out of or in any way related to any First Offer Assignment
(to the extent of the First Offer Assignment); the Company’s obligation to deal with Battery following a First Offer Assignment will be conditioned upon Battery making a substantially similar, waiver, release and agreement. 

(c)    The terms and conditions of this Agreement inure to the benefit of and are binding upon the respective successors
and permitted assignees of the parties. Nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective successors and permitted assignees any rights, remedies, obligations or
liabilities under or by reason of this Agreement, except as expressly provided herein. 
 6.2    Governing Law.
This Agreement and any controversy arising out of or relating to this Agreement shall be governed by the internal laws of the State of Delaware, without regard to its principles of conflicts of laws. 

6.3    Counterparts. This Agreement may be executed in two or more counterparts, each of which shall be deemed an
original, but all of which together shall constitute 

  
 23 

 
one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, e.g.,
www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes. 

6.4    Titles and Subtitles. The titles and subtitles used in this Agreement are for convenience only and are not
to be considered in construing or interpreting this Agreement. 
 6.5    Notices. All notices and other
communications given or made pursuant to this Agreement shall be in writing and shall be deemed effectively given upon the earlier of actual receipt or: (i) personal delivery to the party to be notified, (ii) when sent, if sent by
electronic mail or facsimile during normal business hours of the recipient, and if not sent during normal business hours, then on the recipient’s next business day, (iii) five (5) days after having been sent by registered or certified
mail, return receipt requested, postage prepaid, or (iv) one (1) business day after deposit with a nationally recognized overnight courier, freight prepaid, specifying next business day delivery, with written verification of receipt. All
communications shall be sent to the respective parties at their e-mail address, facsimile number or address as set forth on the applicable signature page or Schedule A, or to such e-mail address, facsimile number or address as subsequently modified by written notice given in accordance with this Subsection 6.5. If notice is given to the Company, a copy shall also be given to Mark A.
Haddad, Foley Hoag LLP, Seaport West, 155 Seaport Blvd., Boston, MA 02210, MHaddad@foleyhoag.com. If notice is given to the Investors, a copy shall also be given to Ilan Nissan, Goodwin Procter LLP, The New York Times Building, 620 Eighth Avenue,
New York, NY 10018-1405, INissan@goodwinprocter.com and to Jane Greyf, Goodwin Procter LLP, The New York Times Building, 620 Eighth Avenue, New York, NY 10018-1405, JGreyf@goodwinprocter.com. 

6.6    Amendments and Waivers. Any term of this Agreement may be amended and the observance of any term of this
Agreement may be waived (either generally or in a particular instance, and either retroactively or prospectively) only with the written consent of, (i) the Company, and (ii) the holders of at least a majority of the shares of Common Stock
issued or issuable upon conversion of shares of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, and Series D Preferred Stock held by the Investors (voting together as a single class and on an as-converted basis); provided that the Company may in its sole discretion waive compliance with Subsection 2.12(c) ( and the Company’s failure to object promptly in writing after notification of a
proposed assignment allegedly in violation of Subsection 2.12(c) shall be deemed to be a waiver); and provided further that any provision hereof may be waived by any waiving party on such party’s own behalf, without the consent of
any other party. Notwithstanding the foregoing, this Agreement may not be amended or terminated and the observance of any term hereof may not be waived with respect to any Investor without the written consent of such Investor, unless such amendment,
termination, or waiver applies to all Investors in the same fashion (it being agreed that a waiver of the provisions of Section 4 with respect to a particular transaction shall be deemed to apply to all Investors in the
same fashion if such waiver does so by its terms, notwithstanding the fact that certain Investors may nonetheless, by agreement with the Company, purchase securities in such transaction). The Company shall give prompt notice of any amendment or
termination hereof or waiver hereunder to any party hereto that did not consent in writing to such amendment, termination, or waiver. Any 

  
 24 

 
amendment, termination, or waiver effected in accordance with this Subsection 6.6 shall be binding on all parties hereto, regardless of whether any such party has consented thereto;
provided, however, that notwithstanding the foregoing, Section 3.3 of this Agreement shall not be amended or waived without the prior written consent of ICONIQ, and provided further, however,
that Section 3.4 of this Agreement, or any particular subsection thereto, shall not be amended or waived without the prior written consent of ICONIQ, OpenView, Index Ventures and RTP Ventures, and provided further,
however, that the definition of Major Investor will not be amended to increase the qualification under such definition to more than 300,000 shares of Registrable Securities (as adjusted for any stock split, stock dividend, combination, or
other recapitalization or reclassification effected after the date hereof), without the approval of the holders of at least a majority of the shares of Common Stock issued upon conversion of shares of Seed Preferred Stock or issuable upon conversion
of the shares of Seed Preferred Stock held by the Investors (voting as a single class and on an as-converted basis). Notwithstanding the foregoing, (a) the rights of ICONIQ under
Section 4.1 may not be waived without its written consent if OpenView, Index Ventures, RTP Ventures or any of their Affiliates or assigns purchases securities in such transaction, (b) the rights of OpenView under
Section 4.1 may not be waived without its written consent if ICONIQ, Index Ventures, RTP Ventures or any of their Affiliates or assigns purchases securities in such transaction, (c) the rights of Index Ventures under
Section 4.1 may not be waived without its written consent if ICONIQ, OpenView, RTP Ventures or any of their Affiliates or assigns purchases securities in such transaction, (d) the rights of RTP Ventures under
Section 4.1 may not be waived without its written consent if ICONIQ, OpenView, Index Ventures or any of their Affiliates or assigns purchases securities in such transaction, and (e) this sentence will not be amended
without the written consent of ICONIQ, OpenView, Index Ventures and RTP Ventures. No waivers of or exceptions to any term, condition, or provision of this Agreement, in any one or more instances, shall be deemed to be or construed as a further or
continuing waiver of any such term, condition, or provision. 
 6.7    Severability. In case any one or more of
the provisions contained in this Agreement is for any reason held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality, or unenforceability shall not affect any other provision of this Agreement, and such invalid,
illegal, or unenforceable provision shall be reformed and construed so that it will be valid, legal, and enforceable to the maximum extent permitted by law. 

6.8    Aggregation of Stock. All shares of Registrable Securities held or acquired by Affiliates shall be
aggregated together for the purpose of determining the availability of any rights under this Agreement and such Affiliated persons may apportion such rights as among themselves in any manner they deem appropriate. 

6.9    Additional Investors. Notwithstanding anything to the contrary contained herein, if the Company issues
additional shares of the Company’s Preferred Stock after the date hereof, any purchaser of such shares of Preferred Stock may become a party to this Agreement by executing and delivering an additional counterpart signature page to this
Agreement, and thereafter shall be deemed an “Investor” for all purposes hereunder. No action or consent by the Investors shall be required for such joinder to this Agreement by such additional Investor, so long as such additional Investor
has agreed in writing to be bound by all of the obligations as an “Investor” hereunder. 

  
 25 

 6.10    Entire Agreement. This Agreement (including any Schedules
and Exhibits hereto) constitutes the full and entire understanding and agreement among the parties with respect to the subject matter hereof, and any other written or oral agreement relating to the subject matter hereof existing between the parties
is expressly canceled. Upon the effectiveness of this Agreement, the Prior Agreement shall be deemed amended and restated and superseded and replaced in its entirety by this Agreement, and shall be of no further force or effect. 

6.11    Dispute Resolution. The parties (a) hereby irrevocably and unconditionally submit to the jurisdiction
of the state courts of Delaware and to the jurisdiction of the United States District Court for the District of Delaware for the purpose of any suit, action or other proceeding arising out of or based upon this Agreement, (b) agree not to
commence any suit, action or other proceeding arising out of or based upon this Agreement except in the state courts of Delaware or the United States District Court for the District of Delaware, and (c) hereby waive, and agree not to assert, by
way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally to the jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution, that
the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such court. 

6.12    WAIVER OF JURY TRIAL. EACH PARTY HEREBY WAIVES ITS RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION
BASED UPON OR ARISING OUT OF THIS AGREEMENT, THE OTHER TRANSACTION DOCUMENTS, THE SECURITIES OR THE SUBJECT MATTER HEREOF OR THEREOF. THE SCOPE OF THIS WAIVER IS INTENDED TO BE ALL-ENCOMPASSING OF ANY AND ALL
DISPUTES THAT MAY BE FILED IN ANY COURT AND THAT RELATE TO THE SUBJECT MATTER OF THIS TRANSACTION, INCLUDING, WITHOUT LIMITATION, CONTRACT CLAIMS, TORT CLAIMS (INCLUDING NEGLIGENCE), BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW AND STATUTORY
CLAIMS. THIS SECTION HAS BEEN FULLY DISCUSSED BY EACH OF THE PARTIES HERETO AND THESE PROVISIONS WILL NOT BE SUBJECT TO ANY EXCEPTIONS. EACH PARTY HERETO HEREBY FURTHER WARRANTS AND REPRESENTS THAT SUCH PARTY HAS REVIEWED THIS WAIVER WITH ITS LEGAL
COUNSEL, AND THAT SUCH PARTY KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL. 

6.13    Delays or Omissions. No delay or omission to exercise any right, power, or remedy accruing to any party
under this Agreement, upon any breach or default of any other party under this Agreement, shall impair any such right, power, or remedy of such nonbreaching or nondefaulting party, nor shall it be construed to be a waiver of or acquiescence to any
such breach or default, or to any similar breach or default thereafter occurring, nor shall any waiver of any single breach or default be deemed a waiver of any other breach or default theretofore or thereafter occurring. All remedies, whether under
this Agreement or by law or otherwise afforded to any party, shall be cumulative and not alternative. 

6.14    Acknowledgment. The Company acknowledges that the Investors are in the business of venture capital
investing and therefore review the business plans and related 

  
 26 

 
proprietary information of many enterprises, including enterprises which may have products or services which compete directly or indirectly with those of the Company. Nothing in this Agreement
shall preclude or in any way restrict an Investor from investing or participating in any particular enterprise whether or not such enterprise has products or services which compete with those of the Company, provided such Investor observes and
continues to comply with its confidentiality obligations under Subsection 3.6. 
 [Remainder of Page Intentionally Left Blank]

  
 27 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated
Investors’ Rights Agreement as of the date first written above. 
  

			
	 COMPANY:
  

DATADOG, INC.

		
	By:	 	/s/ Olivier Pomel
		 	 Olivier Pomel
 Chief Executive
Officer

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

ICONIQ STRATEGIC PARTNERS II, L.P.

		
	By:	 	 ICONIQ Strategic Partners II GP, L.P.,
 its
General Partner

	By:	 	 ICONIQ Strategic Partners II TT GP, Ltd.,

its General Partner

  

			
	By:	 	/s/ Kevin Foster
	Name:	 	Kevin Foster
	Title:	 	Authorized Person

  

			
	ICONIQ STRATEGIC PARTNERS II-B, L.P.
		
	By:	 	 ICONIQ Strategic Partners II GP, L.P.,
 its
General Partner

	By:	 	 ICONIQ Strategic Partners II TT GP, Ltd.,

its General Partner

  

			
	By:	 	/s/ Kevin Foster
	Name:	 	Kevin Foster
	Title:	 	Authorized Person

  

			
	 ICONIQ STRATEGIC PARTNERS II CO-INVEST, L.P.,

DD SERIES

		
	By:	 	 ICONIQ Strategic Partners II GP, L.P.,
 its
General Partner

	By:	 	 ICONIQ Strategic Partners II TT GP, Ltd.,

its General Partner

  

			
	By:	 	/s/ Kevin Foster
	Name:	 	Kevin Foster
	Title:	 	Authorized Person

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

INDEX VENTURES GROWTH III (JERSEY), L.P.

		
	By:	 	 Its Managing General Partner:
 Index Venture
Growth Associates III Limited

  

			
	By:	 	/s/ Nigel Greenwood
	Name:	 	Nigel Greenwood
	Title:	 	Director

  

			
	INDEX VENTURES VI (JERSEY), L.P.
		
	By:	 	 Its Managing General Partner:
 Index Venture
Associates VI Limited

  

			
	By:	 	/s/ Nigel Greenwood
	Name:	 	Nigel Greenwood
	Title:	 	Director

  

			
	INDEX VENTURES VI PARALLEL ENTREPRENEUR FUND (JERSEY), L.P.
		
	By:	 	 Its Managing General Partner:
 Index Venture
Associates VI Limited

  

			
	By:	 	/s/ Nigel Greenwood
	Name:	 	Nigel Greenwood
	Title:	 	Director

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

YUCCA (JERSEY), SLP

	
	By: EFG Trust Company Limited as Authorised Signatory of Yucca (Jersey) SLP in its capacity as administrator of the Index Ventures Growth III Co-Investment Scheme

  

			
	By:	 	/s/ N. T. Greenwood
	Name:	 	N. T. Greenwood
	Title:   Authorised Signatory – EFG Trust Company Limited

  

			
	YUCCA (JERSEY) SLP
	
	By: Elian Employee Benefit Services Limited as Authorised Signatory of Yucca (Jersey) SLP in its capacity as administrator of the Index Co-Investment Scheme

  

			
	By:	 	/s/ Giles Johnstone-Scott & Simon King
	Name:	 	Giles Johnstone-Scott & Simon King
	Title:   Authorised Signatory – Elian Employee Benefit Services Limited

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

OPENVIEW VENTURE PARTNERS III, L.P.

		
	By:	 	 OpenView General Partner III, L.P.,
 its general
partner

		
	By:	 	 OpenView Management, LLC,
 its general
partner

  

			
	By:	 	/s/ Rufus C. King
	Name:	 	Rufus C. King
	Title:	 	Chief Legal Officer

  

			
	OPENVIEW AFFILIATES FUND III, L.P.
		
	By:	 	 OpenView General Partner III, L.P.,
 its general
partner

		
	By:	 	 OpenView Management, LLC,
 its general
partner

  

			
	By:	 	/s/ Rufus C. King
	Name:	 	Rufus C. King
	Title:	 	Chief Legal Officer

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	RU-NET TECHNOLOGY CAPITAL LP
		
	By:	 	/s/ Thomas Sima
	Name:	 	Thomas Sima
	Title:	 	Authorized Representative

  

			
	RU-NET TECHNOLOGY CAPITAL AIV LP
		
	By:	 	/s/ Kirill Sheynkman
	Name:	 	Kirill Sheynkman
	Title:	 	Senior Managing Director

  

			
	/s/ Sabri Murat Bicer
	Sabri Murat Bicer

  

			
	/s/ Kirill Sheynkman
	Kirill Sheynkman

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

CONTOUR OPPORTUNITY FUND, L.P.

		
	By:	 	/s/ Matt Gonh
	Name:	 	Matt Gonh
	Title:	 	Managing Partner

  

			
	CONTOUR VENTURE PARTNERS, L.P.
		
	By:	 	/s/ Matt Gonh
	Name:	 	Matt Gonh
	Title:	 	Managing Partner

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

IA Ventures Strategies Fund I, LP

		
	By:	 	 IA Venture Partners, LLC
 Its General
Partner

		
	By:	 	/s/ Bradford W. Gillespie
	Name:	 	Bradford W. Gillespie
	Title:	 	General Partner

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

RRE VENTURES IV, LP

		
	By:	 	 IA Venture Partners, LLC
 Its General
Partner

		
	By:	 	/s/ William D. Porteous
	Name:	 	William D. Porteous
	Title:	 	General Partner and COO

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	 INVESTORS:
  

AP OPPORTUNITY FUND, LLC

		
	By:	 	 Amplify GP Partners, LLC
 Its
Manager

		
	By:	 	/s/ Sunil Dhaliwal
	Name:	 	Sunil Dhaliwal
	Title:	 	Manager

  

			
	AMPLIFY PARTNERS, L.P.
		
	By:	 	 Amplify GP Partners, LLC
 Its General
Partner

		
	By:	 	/s/ Sunil Dhaliwal
	Name:	 	Sunil Dhaliwal
	Title:	 	Manager

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	NYCSEED, LLC
		
	By:	 	 Polytechnic Institute of New York

University
 Its Member

  

			
	By:	 	/s/ Owen Davis
	Name:	 	Owen Davis
	Title:	 	Managing Director

  

			
	/s/ Lawrence Berger
	Lawrence Berger

  

			
	/s/ Laurence Holt
	Laurence Holt

  

			
	/s/ Toby Berger
	Toby Berger

  

			
	/s/ Michael Callahan
	Michael Callahan

  

			
	/s/ Gerard Neumann
	Gerard Neumann

  

			
	/s/ Alexander F. Payne
	Alexander F. Payne

  

			
	/s/ Robert Pasker
	Robert Pasker

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 
			
	LEAVITT-COVINGTON VENTURES, LLC
		
	By:	 	/s/ Stephen S. Leavitt
	Name:	 	Stephen S. Leavitt
	Title:	 	 

  

			
	/s/ Dennis Covington
	Dennis Covington

 SIGNATURE PAGE TO FOURTH
AMENDED AND RESTATED 
 INVESTORS’ RIGHTS
AGREEMENT 

 Schedule A 

 Exhibit A-1 

Form Of Noncompetition, Nonsolicitation, Nondisclosure and 

Proprietary Rights Assignment Agreement 

See attached. 

 PROPRIETARY INFORMATION AND INVENTIONS AGREEMENT 

Effective as of the first date of my employment, the following confirms an agreement between Datadog, Inc., a Delaware corporation (the
“Company”) and the individual identified on the signature page to this Agreement. This Agreement is a material part of the consideration for my employment by the Company. In exchange for the foregoing, and for other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the parties agree as follows: 
 t. NO CONFLICTS. 1 have not made and
agree not to make any agreement, oral or written, that is in conflict with this Agreement or my employment with the Company. I will not violate any agreement with or the rights of any third party. When acting within the scope of my employment (or
otherwise on behalf of the Company), I will not use or disclose my own or any third party’s confidential information or intellectual property (collectively, “Restricted Materials”), except as expressly authorized by the Company
in writing. Further, I have not retained anything containing any confidential information of a prior employer or other third party, whether or not created by me. 

2. INVENTIONS. 
 a. Definitions.
“Intellectual Property Rights” means any and all patent rights, copyright rights, mask work rights, trade secret rights, sui generis database rights and all other intellectual and industrial property rights of any sort
throughout the world (including any application therefor). “Invention” means any idea, concept, discovery, invention, development, technology, work of authorship, trade secret, software, firmware, tool, process, technique, know-how, data, plan, device, apparatus, specification, design, circuit, layout. mask work, algorithm, program, code, documentation or other material or information, tangible or intangible, whether or not it may be
patented, copyrighted or otherwise protected (including all versions, modifications, enhancements and derivative works thereof). 
 b.
Assignment. To the fullest extent under applicable law, the Company shall own all right, title and interest in and to all Inventions (including all Intellectual Property Rights therein or related thereto) that are made, conceived or reduced to
practice, in whole or in part, by me during the term of my employment with the Company and which arise out of research or other activity conducted by, for or under the direction of the Company (whether or not conducted at the Company’s
facilities, during working hours or using Company assets), or which are useful with or relate directly or indirectly to any “Company Interest” (meaning any product, service, other Invention or Intellectual Property Right that is sold,
leased, used or under consideration or development by the Company). I will promptly disclose and provide all of the foregoing Inventions (the “Assigned Inventions”) to the Company. I hereby make and agree to make all assignments to
the Company necessary to accomplish the foregoing ownership. Assigned Inventions shall not include any Invention (i) that I develop entirely on my own time, (ii) without use of any Company assets and (iii) which is not useful
with and does not relate to any Company Interest. 
 c. Assurances. I will further assist the Company, at its expense, to evidence,
record and perfect such assignments, and to perfect, obtain, maintain, enforce and defend any rights specified to be so owned or assigned. I hereby irrevocably designate and appoint the Company as my agent and attorney-in-fact to act for and in my behalf to execute and file any document and to do all other lawfully permitted acts to further the purposes of the foregoing with the same legal force and effect as if
executed by me. 
 d. Other Inventions. If I wish to clarify that something created by me prior to my employment that relates to the
Company’s actual or proposed business is not within the scope of this Agreement, I have listed it on Appendix A. If (i) I use or disclose any Restricted Materials when acting within the scope of my employment (or otherwise on behalf of the
Company), or (ii) any Assigned Invention cannot be fully made, used, reproduced or otherwise exploited without using or violating any Restricted Materials, I hereby grant and agree to grant to the Company a perpetual, irrevocable, worldwide,
royalty-free, non-exclusive, sublicensable right and license to exploit and exercise all such Restricted Materials and Intellectual Property Rights therein. I will not use or disclose any Restricted Materials
for which I am not fully authorized to grant the foregoing license. 
 e. Moral Rights. To the extent allowed by applicable
law, the terms of this Section 2 include all rights of paternity, integrity, disclosure and withdrawal and any other rights that may be known as or referred to as moral rights, artist’s rights, droit moral or the like (collectively,
“Moral Rights”). To the extent I retain any such Moral Rights under applicable law, I hereby ratify and consent to any action that may be taken with respect to such Moral Rights by or authorized by the Company and agree not to assert any
Moral Rights with respect thereto. I will confirm any such ratification, consent or agreement from time to time as requested by the Company. 

 3. PROPRIETARY INFORMATION. I agree that all Assigned Inventions and all other financial, business,
legal and technical information including, without limitation, the identity of and information relating to the Company’s employees, Affiliates and Business Partners (as such terms are defined below), which I develop, learn or obtain during my
employment or that are received by or for the Company in confidence, constitute “Proprietary Information”. I will hold in strict confidence and not disclose or, except within the scope of my employment, use any Proprietary Information.
Proprietary Information will not include information that I can document is or becomes readily publicly available without restriction through no fault of mine. Upon termination of my employment, I will promptly return to the Company all items
containing or embodying Proprietary Information (including all copies), except that I may keep my personal copies of (a) my compensation records, (b) materials distributed to shareholders generally and (c) this Agreement. I also
recognize and agree that l have no expectation of privacy with respect to the Company’s networks, telecommunications systems or information processing systems (including, without limitation, stored computer files, electronic mail messages and
voice messages), and that my activity and any files or messages on or using any of those systems may be monitored at any time without notice. 
 4.
RESTRICTED ACTIVITIES. For the purposes of this Section 4, the term Company includes the Company and ·all other persons or entities that control, are controlled by or are under common control with the Company
(“Affiliates”). 
 a. Definitions. “Any Capacity” includes, without limitation, to
(i) be an owner, founder, shareholder, partner, member, advisor, director, consultant, contractor, agent, employee, affiliate or co-venturer, (ii) otherwise invest, engage or
participate in, (iii) be compensated by or (iv) prepare to be or do any of the foregoing or assist any third party to do so; provided, Any Capacity will not include being a holder of less than one percent (1%) of the outstanding
equity of a public company. “Business Partner” means any past, present or prospective customer, vendor, supplier, distributor or other business partner of the Company with which I have contact (or knowledge of) during my employment.
Cause means to recruit, employ, retain or otherwise solicit, induce or influence (or to attempt to do so). Solicit means to (i) service, take orders from or solicit the business or patronage of any Business Partner
for myself or any other person or entity, (ii) divert, entice or otherwise take away from the Company the business or patronage of any Business Partner, or to attempt to do so, or (iii) to solicit, induce or encourage any Business Partner
to terminate or reduce its relationship with the Company. 
 b. Acknowledgments. I acknowledge and agree that (i) the
Company’s business is highly competitive, secrecy of the Proprietary Information is of the utmost importance to the Company and I will learn and use Proprietary Information in performing my work for the Company and (ii) my
position may require me to establish goodwill with Business Partners and employees on behalf of the Company and such goodwill is extremely important to the Company’s success. 

c. As an Employee. During my employment with the Company, I will not directly or indirectly: (i) Cause any person to leave their
employment with the Company (other than terminating subordinate employees in the course of my duties for the Company); (ii) Solicit any Business Partner; or (iii) act in Any Capacity in or with respect to any commercial activity which competes
or is reasonably likely to compete with any business that the Company conducts, or demonstrably anticipates conducting, at any time during my employment (a “Competing Business”). 

d. After Termination. For the period of one year immediately following termination of my employment with the Company (for any or
no reason, whether voluntary or involuntary), I will not directly or indirectly: (i) Cause any person to leave their employment with the Company; or (ii) Solicit any Business Partner or (iii) act in Any Capacity in or with respect to
any Competing Business located within the state of New York, the rest of the United States, or anywhere else in the world. 
 e.
Enforcement. I understand that the restrictions set forth in this Section 4 are intended to protect the Company’s interest in its Proprietary Information and established relationships and goodwill with employees and Business Partners,
and I agree that such restrictions are reasonable and appropriate for this purpose. If at any time 

 
any of the provisions of this Section 4 are deemed invalid or unenforceable or are prohibited by the laws of the state or place where they are to be entered into, performed or enforced, by
reason of being vague or unreasonable as to duration or geographic scope or scope of activities restricted, or for any other reason, such provisions shall be considered divisible and shall become and be immediately amended to include only such
restrictions and to such extent as shall be deemed to be reasonable and enforceable by the court or other body having jurisdiction over this Agreement. The Company and I agree that the provisions of this Section 4, as so amended, shall be valid
and binding as though any invalid or unenforceable provision had not been included. 
 5. EMPLOYMENT AT WILL. I agree that this Agreement is
not an employment contract for any particular term. I have the right to resign and the Company has the right to terminate my employment at will, at any time, for any or no reason, with or without cause. This Agreement does not purport to set forth
all of the terms and conditions of my employment, and as an employee of the Company. I have obligations to the Company which are not described in this Agreement. However, the terms of this Agreement govern over any such terms that are inconsistent
with this Agreement, and supersede the terms of any similar form that I may have previously signed. This Agreement can only be changed by a subsequent written agreement signed by the President of the Company (or authorized designee). 

6. SURVIVAL. I agree that my obligations under Sections 2, 3 and 4 of this Agreement shall continue in effect after termination of my employment,
regardless of the reason, and whether such termination is voluntary or involuntary, and that the Company is entitled to communicate my obligations under this Agreement to any of my potential or future employers. My obligations under Sections 2, 3
and 4 also shall be binding upon my heirs, executors, assigns and administrators, and shall inure to the benefit of the Company, its Affiliates, successors and assigns. This Agreement may be freely assigned by the Company to any third party. 

7. GOVERNING LAW; REMEDIES. Any dispute in the meaning, effect or validity of this Agreement shall be resolved in accordance with the laws of the state
of New York without regard to the conflict of laws provisions thereof. I acknowledge and agree that the consideration given for this Agreement is valid and sufficient. I further acknowledge and agree that the enforceability of this Agreement and the
validity of its consideration shall not be affected by any change(s) in my working conditions, including but not limited to promotion, demotion, reduction in compensation, increase in compensation, change in compensation structure, change in title,
change in location of employment, and change of Company name, structure or ownership. The failure of either party to enforce its rights under this Agreement at any time for any period shall not be construed as a waiver of such rights. Unless
expressly provided otherwise, each right and remedy in this Agreement is in addition to any other right or remedy, at law or in equity, and the exercise of one right or remedy will not be deemed a waiver of any other right or remedy. I further agree
that if one or more provisions of this Agreement are held to be illegal or unenforceable under applicable law, such illegal or unenforceable portion shall be limited or excluded from this Agreement to the minimum extent required so that this
Agreement shall otherwise remain in full force and effect and enforceable. I also understand that any breach or threatened breach of this Agreement will cause irreparable harm to the Company for which damages would not be a adequate remedy,
and, therefore, the Company will be entitled to injunctive relief with respect thereto (without the necessity of posting any bond) in addition to any other remedies. 

[Remainder of Page Intentionally Left Blank.) 

 Exhibit A-2 

Form Of Nonsolicitation, Nondisclosure and 

Proprietary Rights Assignment Agreement 

See attached. 

 Exhibit B 

Metric Schedule 
 See attached.

 Generic information and Definition required by Index Ventures 

 

			
	 Metric
	  	 Definition

	Employees at end of quarter (eoq)	  	 •  Full time employee (FTE) equivalent

	  	 •  How many people are working in the business, both permanent and temporary
(including part time)

	Net Revenues	  	 •  Income that the business generates

	Operating Costs	  	 •  Net Revenues – EBITDA

	EBITDA	  	 •  Earnings before interests, tax, depreciation, amortization

	Operating cash Burn / generation during the quarter	  	 •  Cash at hand current period – Cash at hand previous period +/- non
operational cash outflow or inflow (financing, investing)

	Cash at hand – eoq	  	 •  Net cash position:

	  	 ○   Cash at bank

	  	 ○   Plus short term assets (under 6 months)

	  	 ○   Less short term debt (under 6 months)

 Schedule to be filled by the company 
  

			
		  	QX
	 FTE
	  	
	 Net Revenues
	  	
	 Operating Costs
	  	
	 EBITDA
	  	
	 Operating cash burn/generation
	  	
	 Cash at handEX-10.2

 Exhibit 10.2 

DATADOG, INC. 
 2012
EQUITY INCENTIVE PLAN 
 (AS AMENDED THROUGH APRIL 12, 2019) 

1.    ESTABLISHMENT, PURPOSE AND TYPES OF
AWARDS 
 Datadog, Inc., a Delaware corporation (the “Company”), hereby establishes the Datadog, Inc.
2012 Equity Incentive Plan (the “Plan”). The purpose of the Plan is to promote the long-term growth and profitability of the Company by (i) providing key people with incentives to improve stockholder value and to contribute to
the growth and financial success of the Company through their future services, and (ii) enabling the Company to attract, retain and reward the best-available persons. 

The Plan permits the granting of stock options (including incentive stock options qualifying under Code section 422 and nonstatutory stock
options), stock appreciation rights, restricted or unrestricted stock awards, phantom stock, restricted stock units, performance awards, other stock-based awards, or any combination of the foregoing. 

2.    DEFINITIONS 

Under this Plan, except where the context otherwise indicates, the following definitions apply: 

(a)    “Administrator” means the Board or the committee(s) or officer(s) appointed by the
Board that have authority to administer the Plan as provided in Section 3 hereof. 

(b)    “Affiliate” means any entity, whether now or hereafter existing, which controls, is
controlled by, or is under common control with, the Company (including, but not limited to, joint ventures, limited liability companies, and partnerships). For this purpose, “control” shall mean ownership of fifty percent (50%) or
more of the total combined voting power or value of all classes of stock or interests of the entity, or the power to direct the management and policies of the entity, by contract or otherwise. 

(c)    “Award” means any stock option, stock appreciation right, stock award, phantom
stock award, restricted stock unit award, performance award, or other stock-based award. 

(d)    “Board” means the Board of Directors of the Company. 

(e)    “Change in Control” means: (i) the acquisition (other than from the Company)
by any Person, as defined in this Section 2(e), of the beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Securities Exchange Act of 1934, as amended) of fifty percent (50%) or
more of (A) the outstanding shares of the securities of the Company, or (B) the combined voting power of the then outstanding securities of the Company entitled to vote generally in the election of directors (the “Company Voting
Stock”); (ii) the closing of a sale or other conveyance of all or substantially all of the assets of the Company; or (iii) the effective time of any merger, share exchange, consolidation, or other business combination involving the
Company if immediately after such transaction persons who hold a majority of the outstanding voting securities entitled to vote generally in the election of directors of the surviving entity (or the entity owning one hundred percent (100%) of such
surviving entity) are not persons who, immediately prior to such transaction, held the Company Voting Stock; provided, however, that for purposes of any Award or subplan that constitutes a “nonqualified deferred compensation
plan,” within the meaning of Code section 409A, the Administrator, in its discretion, may specify a different definition of Change in Control in order 

  
 1 

 
to comply with the provisions of Code section 409A. For purposes of this Section 2(e), a “Person” means any individual, entity or group within the meaning of
Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as amended, other than: employee benefit plans sponsored or maintained by the Company and by entities controlled by the Company or an underwriter of the Common Stock in a
registered public offering. 
 (f)    “Code” means the Internal Revenue Code of 1986, as
amended, and any regulations promulgated thereunder. 
 (g)    “Common Stock” means
shares of common stock of the Company, par value of $0.00001 per share. 
 (h)    “Fair Market
Value” means, with respect to a share of the Company’s Common Stock for any purpose on a particular date, the value determined by the Administrator in good faith. In making such determination, the Administrator may take into account
any valuation factors it deems appropriate or advisable in its sole discretion, including without limitation, profitability, financial position, asset value or other factor(s) relating to the value of the Company, as well as discounts to account for
minority interests and lack of marketability. However, if the Common Stock is registered under Section 12(b) or 12(g) of the Securities Exchange Act of 1934, as amended, and listed for trading on a national exchange or market, “Fair Market
Value” means, as applicable, (i) either the closing price or the average of the high and low sale price on the relevant date, as determined in the Administrator’s discretion, quoted on the New York Stock Exchange, the American Stock
Exchange, the Nasdaq Global Select Market, or the Nasdaq Global Market; (ii) the last sale price on the relevant date quoted on the Nasdaq Capital Market; (iii) the average of the high bid and low asked prices on the relevant date quoted
on the Nasdaq OTC Bulletin Board Service or by the National Quotation Bureau, Inc. or a comparable service as determined in the Administrator’s discretion; or (iv) if the Common Stock is not quoted by any of the above, the average of the
closing bid and asked prices on the relevant date furnished by a professional market maker for the Common Stock, or by such other source, selected by the Administrator. If no public trading of the Common Stock occurs on the relevant date but the
shares are so listed, then Fair Market Value shall be determined as of the last date before the relevant date on which trading of the Common Stock did occur. For all purposes under this Plan, the term “relevant date” as used in this
Section 2(h) means either the date as of which Fair Market Value is to be determined or the next preceding date on which public trading of the Common Stock occurs, as determined in the Administrator’s discretion. 

(i)    “Grant Agreement” means a written document, including an electronic writing
acceptable to the Administrator, memorializing the terms and conditions of an Award granted pursuant to the Plan and which shall incorporate the terms of the Plan. 

3.    ADMINISTRATION 

(a)    Administration of the Plan. The Plan shall be administered by the Board or by such committee
or committees as may be appointed by the Board from time to time. To the extent allowed by applicable state law, the Board by resolution may authorize an officer or officers to grant Awards (other than stock Awards) to other officers and employees
of the Company and its Affiliates, and, to the extent of such authorization, such officer or officers shall be the Administrator. 

  
 2 

 (b)    Powers of the Administrator. The
Administrator shall have all the powers vested in it by the terms of the Plan, such powers to include authority, in its sole and absolute discretion, to grant Awards under the Plan, prescribe Grant Agreements evidencing such Awards and establish
programs for granting Awards. 
 The Administrator shall have full power and authority to take all other actions necessary
to carry out the purpose and intent of the Plan, including, but not limited to, the authority to: (i) determine the eligible persons to whom, and the time or times at which Awards shall be granted; (ii) determine the types of Awards to be
granted; (iii) determine the number of shares to be covered by or used for reference purposes for each Award; (iv) impose such terms, limitations, restrictions and conditions upon any such Award as the Administrator shall deem appropriate;
(v) modify, amend, extend or renew outstanding Awards, or accept the surrender of outstanding Awards and substitute new Awards (provided, however, that, except as provided in Section 6 or 7(d) of the Plan, any modification
that would materially adversely affect any outstanding Award shall not be made without the consent of the holder); (vi) accelerate or otherwise change the time in which an Award may be exercised or becomes payable and to waive or accelerate the
lapse, in whole or in part, of any restriction or condition with respect to such Award, including, but not limited to, any restriction or condition with respect to the vesting or exercisability of an Award following termination of any grantee’s
employment or other relationship with the Company; (vii) establish objectives and conditions, if any, for earning Awards and determining whether Awards will be paid with respect to a performance period; and (viii) for any purpose,
including but not limited to, qualifying for preferred tax treatment under foreign tax laws or otherwise complying with the regulatory requirements of local or foreign jurisdictions, to establish, amend, modify, administer or terminate sub-plans, and prescribe, amend and rescind rules and regulations relating to such sub-plans. 

The Administrator shall have full power and authority, in its sole and absolute discretion, to administer, construe and
interpret the Plan, Grant Agreements and all other documents relevant to the Plan and Awards issued thereunder, to establish, amend, rescind and interpret such rules, regulations, agreements, guidelines and instruments for the administration of the
Plan and for the conduct of its business as the Administrator deems necessary or advisable, and to correct any defect, supply any omission or reconcile any inconsistency in the Plan or in any Award in the manner and to the extent the Administrator
shall deem it desirable to carry it into effect. 

(c)    Non-Uniform Determinations. The Administrator’s
determinations under the Plan (including without limitation, determinations of the persons to receive Awards, the form, amount and timing of such Awards, the terms and provisions of such Awards and the Grant Agreements evidencing such Awards) need
not be uniform and may be made by the Administrator selectively among persons who receive, or are eligible to receive, Awards under the Plan, whether or not such persons are similarly situated. 

(d)    Limited Liability. To the maximum extent permitted by law, no member of the Administrator
shall be liable for any action taken or decision made in good faith relating to the Plan or any Award thereunder. 

(e)    Indemnification. To the maximum extent permitted by law and by the Company’s charter
and bylaws, the members of the Administrator shall be indemnified by the Company in respect of all their activities under the Plan. 

(f)    Effect of Administrator’s Decision. All actions taken and decisions and determinations
made by the Administrator on all matters relating to the Plan pursuant to the powers vested in it hereunder shall be in the Administrator’s sole and absolute discretion and shall be conclusive and binding on all parties concerned, including the
Company, its stockholders, any participants in the Plan and any other employee, consultant, or director of the Company, and their respective successors in interest. 

  
 3 

 4.    SHARES AVAILABLE FOR
THE PLAN 
 Subject to adjustments as provided in Section 7(d) of the Plan, the shares of Common Stock
that may be issued with respect to Awards granted under the Plan shall not exceed an aggregate of 24,280,716 shares of Common Stock. The Company shall reserve such number of shares for Awards under the Plan, subject to adjustments as provided
in Section 7(d) of the Plan. If any Award, or portion of an Award, under the Plan expires or terminates unexercised, becomes unexercisable, is settled in cash without delivery of shares of Common Stock, or is forfeited or otherwise terminated,
surrendered or canceled as to any shares, or if any shares of Common Stock are repurchased by or surrendered to the Company in connection with any Award (whether or not such surrendered shares were acquired pursuant to any Award), or if any shares
are withheld by the Company, the shares subject to such Award and the repurchased, surrendered and withheld shares shall thereafter be available for further Awards under the Plan; provided, however, that any such shares that are
surrendered to or repurchased or withheld by the Company in connection with any Award or that are otherwise forfeited after issuance shall not be available for purchase pursuant to incentive stock options intended to qualify under Code section 422.

 5.    PARTICIPATION 

Participation in the Plan shall be open to all employees, officers, and directors of, and other individuals providing bona fide services to or
for, the Company, or of any Affiliate of the Company, as may be selected by the Administrator from time to time. The Administrator may also grant Awards to individuals in connection with hiring, retention or otherwise, prior to the date the
individual first performs services for the Company or an Affiliate, provided that such Awards shall not become vested or exercisable, and no shares shall be issued to such individual, prior to the date the individual first commences
performance of such services. 
 6.    AWARDS 

The Administrator, in its sole discretion, establishes the terms of all Awards granted under the Plan. Awards may be granted individually or in
tandem with other types of Awards, concurrently with or with respect to outstanding Awards. All Awards are subject to the terms and conditions provided in the Grant Agreement. 

(a)    Stock Options. The Administrator may from time to time grant to eligible participants Awards
of incentive stock options as that term is defined in Code section 422 or nonstatutory stock options; provided, however, that Awards of incentive stock options shall be limited to employees of the Company or of any current or hereafter
existing “parent corporation” or “subsidiary corporation,” as defined in Code sections 424(e) and (f), respectively, of the Company and any other individuals who are eligible to receive incentive stock options under the
provisions of Code section 422. Options intended to qualify as incentive stock options under Code section 422 must have an exercise price at least equal to Fair Market Value as of the date of grant, but nonstatutory stock options may be granted with
an exercise price less than Fair Market Value. No stock option shall be an incentive stock option unless so designated by the Administrator at the time of grant or in the Grant Agreement evidencing such stock option. 

  
 4 

 (b)    Stock Appreciation Rights. The
Administrator may from time to time grant to eligible participants Awards of Stock Appreciation Rights (“SAR”). A SAR entitles the grantee to receive, subject to the provisions of the Plan and the Grant Agreement, a payment having
an aggregate value equal to the product of (i) the excess of (A) the Fair Market Value on the exercise date of one share of Common Stock over (B) the base price per share specified in the Grant Agreement, times (ii) the number of
shares specified by the SAR, or portion thereof, which is exercised. The base price per share specified in the Grant Agreement shall not be less than the lower of the Fair Market Value on the grant date or the exercise price of any tandem stock
option Award to which the SAR is related. No SAR shall have a term longer than ten (10) years’ duration. Payment by the Company of the amount receivable upon any exercise of a SAR may be made by the delivery of Common Stock or cash, or any
combination of Common Stock and cash, as determined in the sole discretion of the Administrator. If upon settlement of the exercise of a SAR a grantee is to receive a portion of such payment in shares of Common Stock, the number of shares shall be
determined by dividing such portion by the Fair Market Value of a share of Common Stock on the exercise date. No fractional shares shall be used for such payment and the Administrator shall determine whether cash shall be given in lieu of such
fractional shares or whether such fractional shares shall be eliminated. 
 (c)    Stock Awards.
The Administrator may from time to time grant restricted or unrestricted stock Awards to eligible participants in such amounts, on such terms and conditions, and for such consideration, including no consideration or such minimum consideration as may
be required by law, as it shall determine. A stock Award may be paid in Common Stock, in cash, or in a combination of Common Stock and cash, as determined in the sole discretion of the Administrator. 

(d)    Phantom Stock. The Administrator may from time to time grant Awards to eligible participants
denominated in stock-equivalent units or restricted stock units (“phantom stock units”) in such amounts and on such terms and conditions as it shall determine. Phantom stock units granted to a participant shall be credited to a
bookkeeping reserve account solely for accounting purposes and shall not require a segregation of any of the Company’s assets. An Award of phantom stock units may be settled in Common Stock, in cash, or in a combination of Common Stock and
cash, as determined in the sole discretion of the Administrator and set forth in the applicable Grant Agreement. Except as otherwise provided in the applicable Grant Agreement, the grantee shall not have the rights of a stockholder with respect to
any shares of Common Stock represented by a phantom stock unit solely as a result of the grant of a phantom stock unit to the grantee. 

(e)    Performance Awards. The Administrator may, in its discretion, grant performance awards which
become payable on account of attainment of one or more performance goals established by the Administrator. Performance awards may be paid by the delivery of Common Stock or cash, or any combination of Common Stock and cash, as determined in the sole
discretion of the Administrator. Performance goals established by the Administrator may be based on the Company’s or an Affiliate’s operating income or one or more other business criteria selected by the Administrator that apply to an
individual or group of individuals, a business unit, or the Company or an Affiliate as a whole, over such performance period as the Administrator may designate. 

(f)    Other Stock-Based Awards. The Administrator may from time to time grant other stock-based
awards to eligible participants in such amounts, on such terms and conditions, and for such consideration, including no consideration or such minimum consideration as may be required by law, as it shall determine. Other stock-based awards may be
denominated in cash, in Common Stock or other securities, in stock-equivalent units, in stock appreciation units, in securities or debentures convertible into Common Stock, or in any combination of the foregoing and may be paid in Common Stock or
other securities, in cash, or in a combination of Common Stock or other securities and cash, all as determined in the sole discretion of the Administrator. 

  
 5 

 7.    MISCELLANEOUS 

(a)    Withholding of Taxes. Grantees and holders of Awards shall pay to the Company or its
Affiliate, or make provision satisfactory to the Administrator for payment of, any taxes required to be withheld in respect of Awards under the Plan no later than the date of the event creating the tax liability. The Company or its Affiliate may, to
the extent permitted by law, deduct any such tax obligations from any payment of any kind otherwise due to the grantee or holder of an Award. In the event that payment to the Company or its Affiliate of such tax obligations is made in shares of
Common Stock, such shares shall be valued at Fair Market Value on the applicable date for such purposes and shall not exceed in amount the minimum statutory tax withholding obligation. 

(b)    Loans. To the extent otherwise permitted by law, the Company or an Affiliate may make or
guarantee loans to grantees to assist grantees in exercising Awards and satisfying any withholding tax obligations. 

(c)    Transferability. Except as otherwise determined by the Administrator, and in any event in
the case of an incentive stock option or a stock appreciation right granted with respect to an incentive stock option, no Award granted under the Plan shall be transferable by a grantee otherwise than by will or the laws of descent and distribution.
Unless otherwise determined by the Administrator in accord with the provisions of the immediately preceding sentence, an Award may be exercised during the lifetime of the grantee, only by the grantee or, during the period the grantee is under a
legal disability, by the grantee’s guardian or legal representative. 
 (d)    Adjustments for
Corporate Transactions and Other Events. 
  

	 	(i)	 Stock Dividend, Stock Split and Reverse Stock Split. In the event of a stock dividend of, or stock split or
reverse stock split affecting, the Common Stock, (A) the maximum number of shares of such Common Stock as to which Awards may be granted under this Plan, as provided in Section 4 of the Plan, and (B) the number of shares covered by
and the exercise price and other terms of outstanding Awards, shall, without further action of the Board, be adjusted to reflect such event. The Administrator may make adjustments, in its discretion, to address the treatment of fractional shares and
fractional cents that arise with respect to outstanding Awards as a result of the stock dividend, stock split or reverse stock split. 

  

	 	(ii)	 Change in Control Transactions. In the event of any transaction resulting in a Change in Control of the
Company, outstanding stock options and other Awards that are payable in or convertible into Common Stock under this Plan will terminate upon the effective time of such Change in Control unless provision is made in connection with the transaction for
the continuation or assumption of such Awards by, or for the substitution of the equivalent awards, as determined in the sole discretion of the Administrator, of, the surviving or successor entity or a parent thereof. In the event of such
termination, (A) the outstanding stock options and other Awards that will terminate upon the effective time of the Change in Control shall become fully vested immediately before the effective time of the Change in Control, and (B) the
holders of stock options and other Awards under the Plan will be permitted, immediately before the Change in Control, to exercise or convert all portions of such stock options or other Awards under the Plan that are then exercisable or convertible
or which 

  
 6 

	 	
become exercisable or convertible upon or prior to the effective time of the Change in Control. If, immediately before the Change in Control, no stock of the Company is readily tradeable on an
established securities market or otherwise, and the vesting of an Award or Awards pursuant to this Section 7(d)(iii) would be treated as a “parachute payment” (as defined in section 280G of the Code), then such Award or Awards shall
not vest unless the requirements of the stockholder approval exemption of section 280G(b)(5) of the Code have been satisfied with respect to such Award or Awards. 

 

	 	(iii)	 Change in Control Transactions. The following provisions will apply to Awards in the event of a Change in
Control 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. In
the event of a Change in Control, then, notwithstanding any other provision of the Plan, the Board may take one or more of the following actions with respect to Awards, contingent upon the closing or completion of the Change in Control:

 (1)    arrange for the surviving corporation or acquiring corporation (or the
surviving or acquiring corporation’s parent company) to assume or continue the Award or to substitute a similar Award for the Award (including, but not limited to, an award to acquire the same consideration paid to the stockholders of the
Company pursuant to the Change in Control); 
 (2)    arrange for the assignment of any reacquisition
or repurchase rights held by the Company in respect of Common Stock issued pursuant to the Award to the surviving corporation or acquiring corporation (or the surviving or acquiring corporation’s parent company); 

(3)    accelerate the vesting, in whole or in part, of the Award (and, if applicable, the time at which
the Award may be exercised) to a date prior to the effective time of such Change in Control as the Board determines (or, if the Board does not determine such a date, to the date that is five (5) days prior to the effective date of the Change in
Control), with such Award terminating if not exercised (if applicable) at or prior to the effective time of the Change in Control; provided, however, that the Board may require participants to complete and deliver to the Company a
notice of exercise before the effective date of a Change in Control, which exercise is contingent upon the effectiveness of such Change in Control; 

(4)    arrange for the lapse, in whole or in part, of any reacquisition or repurchase rights held by the
Company with respect to the Award; 
 (5)    cancel or arrange for the cancellation of the Award, to
the extent not vested or not exercised prior to the effective time of the Change in Control, in exchange for such cash consideration, if any, as the Board, in its sole discretion, may consider appropriate; and 

  
 7 

 (6)    make a payment, in such form as may be
determined by the Board equal to the excess, if any, of (A) the value of the property the participant would have received upon the exercise of the Award immediately prior to the effective time of the Change in Control, over (B) any
exercise price payable by such holder in connection with such exercise. For clarity, this payment may be zero ($0) if the value of the property is equal to or less than the exercise price. Payments under this provision may be delayed to the same
extent that payment of consideration to the holders of the Company’s Common Stock in connection with the Change in Control is delayed as a result of escrows, earn outs, holdbacks or any other contingencies. 

The Board need not take the same action or actions with respect to all Awards or portions thereof or with respect to all participants. The
Board may take different actions with respect to the vested and unvested portions of a Award. 
  

	 	(iv)	 Unusual or Nonrecurring Events. The Administrator is authorized to make, in its discretion and without the
consent of holders of Awards, adjustments in the terms and conditions of, and the criteria included in, Awards in recognition of unusual or nonrecurring events affecting the Company, or the financial statements of the Company or any Affiliate, or of
changes in applicable laws, regulations, or accounting principles, whenever the Administrator determines that such adjustments are appropriate in order to prevent dilution or enlargement of the benefits or potential benefits intended to be made
available under the Plan. 

 (e)    Substitution of Awards in Mergers and
Acquisitions. Awards may be granted under the Plan from time to time in substitution for awards held by employees, officers, consultants, or directors of entities who become or are about to become employees, officers, consultants, or directors
of the Company or an Affiliate as the result of a merger or consolidation of the employing entity with the Company or an Affiliate, or the acquisition by the Company or an Affiliate of the assets or stock of the employing entity. The terms and
conditions of any substitute Awards so granted may vary from the terms and conditions set forth herein to the extent that the Administrator deems appropriate at the time of grant to conform the substitute Awards to the provisions of the awards for
which they are substituted. 
 (f)    Other Agreements. As a condition precedent to the grant of
any Award under the Plan, the exercise pursuant to such an Award, or to the delivery of certificates for shares issued pursuant to any Award, the Administrator may require the grantee or the grantee’s successor or permitted transferee, as the
case may be, to become a party to a stock restriction agreement, stockholders’ agreement, voting trust agreement or other agreements regarding the Common Stock of the Company in such form(s) as the Administrator may determine from time to time.

 (g)    Termination, Amendment and Modification of the Plan. The Board may terminate, amend or
modify the Plan or any portion thereof at any time. Except as otherwise determined by the Board, termination of the Plan shall not affect the Administrator’s ability to exercise the powers granted to it hereunder with respect to Awards granted
under the Plan prior to the date of such termination. 

  
 8 

(h)    Non-Guarantee of Employment or Service. Nothing in
the Plan or in any Grant Agreement thereunder shall confer any right on an individual to continue in the service of the Company or shall interfere in any way with the right of the Company to terminate such service at any time with or without cause
or notice and whether or not such termination results in (i) the failure of any Award to vest; (ii) the forfeiture of any unvested or vested portion of any Award; and/or (iii) any other adverse effect on the individual’s
interests under the Plan. 
 (i)    Compliance with Securities Laws; Listing and Registration. If
at any time the Administrator determines that the delivery of Common Stock under the Plan is or may be unlawful under the laws of any applicable jurisdiction, or Federal, state or foreign securities laws, the right to exercise an Award or receive
shares of Common Stock pursuant to an Award shall be suspended until the Administrator determines that such delivery is lawful. The Company shall have no obligation to effect any registration or qualification of the Common Stock under Federal, state
or foreign laws. 
 The Company may require that a grantee, as a condition to exercise of an Award, and as a condition to
the delivery of any share certificate, make such written representations (including representations to the effect that such person will not dispose of the Common Stock so acquired in violation of Federal, state or foreign securities laws) and
furnish such information as may, in the opinion of counsel for the Company, be appropriate to permit the Company to issue the Common Stock in compliance with applicable Federal, state or foreign securities laws. The stock certificates for any shares
of Common Stock issued pursuant to this Plan may bear a legend restricting transferability of the shares of Common Stock unless such shares are registered or an exemption from registration is available under the Securities Act of 1933, as amended,
and applicable state or foreign securities laws. 
 (j)    No Trust or Fund Created. Neither the
Plan nor any Award shall create or be construed to create a trust or separate fund of any kind or a fiduciary relationship between the Company and a grantee or any other person. To the extent that any grantee or other person acquires a right to
receive payments from the Company pursuant to an Award, such right shall be no greater than the right of any unsecured general creditor of the Company. 

(k)    Governing Law. The validity, construction and effect of the Plan, of Grant Agreements
entered into pursuant to the Plan, and of any rules, regulations, determinations or decisions made by the Administrator relating to the Plan or such Grant Agreements, and the rights of any and all persons having or claiming to have any interest
therein or thereunder, shall be determined exclusively in accordance with applicable federal laws and the laws of the State of Delaware, without regard to its conflict of laws principles. 

(l)    409A Savings Clause. The Plan and all Awards granted hereunder are intended to comply with,
or otherwise be exempt from, Code section 409A. The Plan and all Awards granted under the Plan shall be administered, interpreted, and construed in a manner consistent with Code section 409A to the extent necessary to avoid the imposition of
additional taxes under Code section 409A(a)(1)(B). Should any provision of the Plan, any Award Agreement, or any other agreement or arrangement contemplated by the Plan be found not to comply with, or otherwise be exempt from, the provisions of Code
section 409A, such provision shall be modified and given effect (retroactively if necessary), in the sole discretion of the Administrator, and without the consent of the holder of the Award, in such manner as the Administrator determines to be
necessary or appropriate to comply with, or to effectuate an exemption from, Code section 409A. Notwithstanding anything in the Plan to the contrary, in no event shall the Administrator exercise its discretion to accelerate the payment or settlement
of an Award where such payment or settlement constitutes deferred compensation within the meaning of Code section 409A unless, and solely to the extent, that such accelerated payment or settlement is permissible under Treasury Regulation section 1.409A-3(j)(4) or any successor provision. 

  
 9 

 (m)    Effective Date; Termination Date. The Plan
is effective as of the date on which the Plan is adopted by the Board, subject to approval of the stockholders within twelve (12) months before or after such date. No Award shall be granted under the Plan after the close of business on the day
immediately preceding the tenth (10th) anniversary of the effective date of the Plan, or if earlier, the tenth (10th) anniversary of the date this Plan is approved by the stockholders. Subject to other applicable provisions of the Plan, all Awards
made under the Plan prior to such termination of the Plan shall remain in effect until such Awards have been satisfied or terminated in accordance with the Plan and the terms of such Awards. 

  
 10 

 APPENDIX A 

PROVISIONS FOR CALIFORNIA RESIDENTS 

With respect to Awards granted to California residents prior to a public offering of capital stock of the Company that is effected pursuant to
a registration statement filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act of 1933, as amended, and only to the extent required by applicable law, the following provisions shall apply
notwithstanding anything in the Plan or a Grant Agreement to the contrary: 
  

	1.	 With respect to any Award granted in the form of a stock option pursuant to Section 6(a) of the Plan:

 (a)    The exercise period shall be no more than one hundred twenty (120) months from the date
the option is granted. 
 (b)    The options shall be non-transferable other than
by will, by the laws of descent and distribution, or, if and to the extent permitted under the Grant Agreement, to a revocable trust or as permitted by Rule 701 of the Securities Act of 1933, as amended (17 C.F.R. 230.701). 

(c)    Unless employment is terminated for “cause” as defined by applicable law, the terms of the Plan or Grant
Agreement, or a contract of employment, the right to exercise the option in the event of termination of employment, to the extent that the Award recipient is entitled to exercise on the date employment terminates, will continue until the earlier of
the option expiration date, or: 
 (1)    At least six (6) months from the date of termination if termination was
caused by death or disability. 
 (2)    At least thirty (30) days from the date of termination if termination was
caused by other than death or disability. 
 2.    With respect to an Award, granted pursuant to Section 6(c) of the Plan, that
provides the Award recipient the right to purchase stock, the Award shall be non-transferable other than by will, by the laws of descent and distribution, or, if and to the extent permitted under the Grant
Agreement, to a revocable trust or as permitted by Rule 701 of the Securities Act of 1933, as amended (17 C.F.R. 230.701). 
 3.    The
Plan shall have a termination date of not more than ten (10) years from the date the Plan is adopted by the Board or the date the Plan is approved by the security holders, whichever is earlier. 

4.    Security holders representing a majority of the Company’s outstanding securities entitled to vote must approve the Plan by the
later of (a) twelve (12) months after the date the Plan is adopted or (b) twelve (12) months after the granting of any Award to a resident of California. Any option exercised or any securities purchased before security holder approval is
obtained must be rescinded if security holder approval is not obtained within the period described in the preceding sentence. Such securities shall not be counted in determining whether such approval is obtained. 

  
 11 

 5.    At the discretion of the Administrator, the Company may reserve to itself and/or
its assignee(s) in the Grant Agreement or any applicable stock restriction agreement a right to repurchase securities held by an Award recipient upon such Award recipient’s termination of employment at any time within six (6) months after
such Award recipient’s termination date (or in the case of securities issued upon exercise of an option after the termination date, within six (6) months after the date of such exercise) for cash or cancellation of purchase money
indebtedness, at: 
  

	 	(a)	 no less than the Fair Market Value of such securities as of the date of the Award recipient’s termination
of employment, provided, that such right to repurchase securities terminates when the Company’s securities have become publicly traded; or 

  

	 	(b)	 the Award recipient’s original purchase price, provided, that such right to repurchase securities
at the original purchase price lapses at the rate of at least twenty (20%) of the securities per year over five (5) years from the date the option is granted (without respect to the date the option was exercised or became exercisable).

 The securities held by an officer, director, manager or consultant of the Company or an affiliate may be subject to
additional or greater restrictions. 
 6.    The Company will provide financial statements to each Award recipient annually during the
period such individual has Awards outstanding, or as otherwise required under Section 260.140.46 of Title 10 of the California Code of Regulations. Notwithstanding the foregoing, the Company will not be required to provide such financial
statements to Award recipients when the Plan complies with all conditions of Rule 701 of the Securities Act of 1933, as amended (17 C.F.R. 230.701); provided, that for purposes of determining such compliance, any registered domestic partner
shall be considered a “family member” as that term is defined in Rule 701. 
 7.    The Plan is intended to comply with
Section 25102(o) of the California Corporations Code. Any provision of this Plan which is inconsistent with Section 25102(o), including without limitation any provision of this Plan that is more restrictive than would be permitted by
Section 25102(o) as amended from time to time, shall, without further act or amendment by the Board, be reformed to comply with the provisions of Section 25102(o). If at any time the Administrator determines that the delivery of Common
Stock under the Plan is or may be unlawful under the laws of any applicable jurisdiction, or federal or state securities laws, the right to exercise an Award or receive shares of Common Stock pursuant to an Award shall be suspended until the
Administrator determines that such delivery is lawful. The Company shall have no obligation to effect any registration or qualification of the Common Stock under federal or state laws. 

  
 12 

 NOT FOR USE WITH CA RESIDENTS 

DATADOG, INC. 

INCENTIVE STOCK OPTION NOTICE 

This Incentive Stock Option Notice (this “Notice”) evidences the award of stock options (each, an
“Option” or collectively, the “Options”) that have been granted to you, [NAME],
subject to and conditioned upon your agreement to the terms of the attached Incentive Stock Option Grant Agreement (the “Grant Agreement”). The Options entitle you to purchase shares of common stock, par value $0.00001 per
share (“Common Stock”), of Datadog, Inc., a Delaware corporation (the “Company”), under the Datadog, Inc. 2012 Equity Incentive Plan (the “Plan”). The number of shares you may
purchase and the exercise price at which you may purchase them are specified below. This Notice constitutes part of and is subject to the terms and provisions of the Grant Agreement and the Plan, which are incorporated by reference herein. You
must return an executed copy of this Notice to the Company within 30 days of the date hereof. If you fail to do so, the Options may be rendered null and void in the Company’s discretion. 

Grant Date: [GRANT DATE]

 Vesting Base Date: [VESTING BASE DATE] 
 Number of Options: [NUMBER] Options, each permitting the purchase of one Share 
 Exercise Price: [PRICE] per share 

Expiration Date: The Options expire at 5:00 p.m. Eastern Time on the ten-year anniversary of the Grant Date (the
“Expiration Date”), unless fully exercised or terminated earlier. 
 Exercisability Schedule:    Subject
to the terms and conditions described in the Agreement, the Options become exercisable in accordance with the schedule below: 
  

	(a)	 [_____]% of the Options become exercisable on the first
anniversary of the Vesting Base Date (the “Initial Vesting Date”), and 

  

	(b)	 [_____]% of the Options become exercisable on the date [____] after the Initial Vesting Date and on such date every [_______] thereafter, through the [______] anniversary of
the Vesting Base Date. 

 The extent to which the Options are exercisable as of a particular date is rounded down to the nearest whole
share. However, exercisability is rounded up to 100% on the [_____] anniversary of the Vesting Base Date. 

 

			
	 DATADOG, INC.

		
	By:	 	 
		 	 Name:

		 	 Title:

 I acknowledge that I have carefully read the attached Agreement and the Plan and agree to be bound by all of the
provisions set forth in these documents. 
  

									
	Enclosures:	 	 Incentive Stock Option Grant Agreement

Datadog, Inc. 2012 Equity Incentive Plan
 Stock
Restriction Agreement
 Exercise Form
	 		 	OPTIONEE
		 		 		 	      

		 		 		 	Date:	 	      

 INCENTIVE STOCK OPTION GRANT
AGREEMENT 
 UNDER THE 

DATADOG, INC. 2012 EQUITY INCENTIVE PLAN 

1.    Terminology. Capitalized terms used in this Agreement are defined in the correlating Stock Option Notice
and/or the Glossary at the end of the Agreement. 
 2.    Exercise of Options. 

(a)    Exercisability. The Options will become exercisable in accordance with the Exercisability Schedule set forth
in the Stock Option Notice, so long as you are in the Service of the Company from the Grant Date through the applicable exercisability dates. None of the Options will become exercisable after your Service with the Company ceases, unless the Stock
Option Notice provides otherwise with respect to exercisability that arises as a result of your cessation of Service. 

(b)    Right to Exercise. You may exercise the Options, to the extent exercisable, at any time on or before
5:00 p.m. Eastern Time on the Expiration Date or the earlier termination of the Options, unless otherwise provided under applicable law. Notwithstanding the foregoing, if at any time the Administrator determines that the delivery of Shares
under the Plan or this Agreement is or may be unlawful under the laws of any applicable jurisdiction, or Federal, state or foreign securities laws, the right to exercise the Options or receive Shares pursuant to the Options shall be suspended until
the Administrator determines that such delivery is lawful. If at any time the Administrator determines that the delivery of Shares under the Plan or this Agreement is or may violate the rules of the national securities exchange on which the shares
are then listed for trade, the right to exercise the Options or receive Shares pursuant to the Options shall be suspended until the Administrator determines that such exercise or delivery would not violate such rules. Section 3 below describes
certain limitations on exercise of the Options that apply in the event of your death, Total and Permanent Disability, or termination of Service. The Options may be exercised only in multiples of whole Shares and may not be exercised at any one time
as to fewer than one hundred Shares (or such lesser number of Shares as to which the Options are then exercisable). No fractional Shares will be issued under the Options. 

(c)    Exercise Procedure. In order to exercise the Options, you must provide the following items to the Secretary
of the Company or his or her delegate before the expiration or termination of the Options: 
  

	 	(i)	 notice, in such manner and form as the Administrator may require from time to time, specifying the number of
Shares to be purchased under the Options; 

  

	 	(ii)	 full payment of the Exercise Price for the Shares or properly executed, irrevocable instructions, in such
manner and form as the Administrator may require from time to time, to effectuate a broker-assisted cashless exercise, each in accordance with Section 2(d) of this Agreement; and 

 

	 	(iii)	 an executed copy of any other agreements requested by the Administrator pursuant to Section 2(e) of this
Agreement. 

 An exercise will not be effective until the Secretary of the Company or his or her delegate receives all of the foregoing
items, and such exercise otherwise is permitted under and complies with all applicable Federal, state and foreign securities laws. Notwithstanding the foregoing, if the Administrator permits payment by means of delivering properly executed,
irrevocable instructions, in such manner and form as the Administrator may require from time to time, to effectuate a broker-assisted cashless exercise and such instructions provide for sale of Shares under a limit order rather than at the market,
the exercise will not be effective until the earlier of the date the Company receives delivery of cash or cash equivalents in full payment of the Exercise Price or the date the Company receives confirmation from the brokerage firm that the sale
instruction has been fulfilled, and the exercise will not be effective unless the earlier of such dates occurs on or before termination of the Options. 

 (d)    Method of Payment. You may pay the aggregate Exercise
Price by: 
  

	 	(i)	 delivery of cash, certified or cashier’s check, money order or other cash equivalent acceptable to the
Administrator in its discretion; 

  

	 	(ii)	 a broker-assisted cashless exercise in accordance with Regulation T of the Board of Governors of the Federal
Reserve System through a brokerage firm designated or approved by the Administrator; 

  

	 	(iii)	 subject to such limits as the Administrator may impose from time to time, tender (via actual delivery or
attestation) to the Company of other shares of Common Stock of the Company which have a Fair Market Value on the date of tender equal to the Exercise Price; 

  

	 	(iv)	 any other method approved by the Administrator; or 

 

	 	(v)	 any combination of the foregoing. 

(e)    Agreement to Execute Other Agreements. You agree to execute, as a condition precedent to the exercise of the
Options and at any time thereafter as may reasonably be requested by the Administrator, a Stock Restriction Agreement substantially in the form, and containing the terms and provisions, of the Stock Restriction Agreement attached hereto as
Exhibit A, with respect to any shares you acquire pursuant to this Agreement; provided, however, that execution of the Stock Restriction Agreement will not be required upon any exercise that occurs after the closing of the first public offering
of capital stock of the Company that is effected pursuant to a registration statement filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act of 1933 or, if later, the expiration of any market stand-off agreement that applies to other stockholders of the Company respecting such public offering of capital stock. 

(f)    Issuance of Shares upon Exercise. The Company shall issue to you the Shares underlying the Options you
exercise as soon as practicable after the exercise date, subject to the Company’s receipt of the aggregate Exercise Price and the requisite withholding taxes, if any. Upon issuance of such Shares, the Company may deliver, subject to the
provisions of Section 7 below, such Shares on your behalf electronically to the Company’s designated stock plan administrator or such other broker-dealer as the Company may choose at its sole discretion, within reason, or may retain such
Shares in uncertificated book-entry form. Any share certificates delivered will, unless the Shares are registered or an exemption from registration is available under applicable Federal and state law, bear a legend restricting transferability of
such Shares and referencing any applicable Stock Restriction Agreement. 
 3.    Termination of Service. 

(a)    Termination of Unexercisable Options. If your Service with the Company ceases for any reason, the Options
that are then unexercisable will terminate immediately upon such cessation. 
 (b)    Exercise Period Following
Termination of Service. If your Service with the Company ceases for any reason other than discharge for Cause, the Options that are then exercisable, will terminate upon the earliest of: 

 

	 	(i)	 the expiration of 90 days following such cessation, if your Service ceases on account of (1) your
termination by the Company other than a discharge for Cause, or (2) your voluntary termination other than for Total and Permanent Disability or death; 

  

	 	(ii)	 the expiration of 12 months following such cessation, if your Service ceases on account of your Total and
Permanent Disability or death; 

	 	(iii)	 the expiration of 12 months following your death, if your death occurs during the periods described in
clauses (i) or (ii) of this Section 3(b), as applicable; or 

  

	 	(iv)	 the Expiration Date. 

In the event of your death, the exercisable Options may be exercised by your executor, personal representative, or the person(s) to whom the Options are
transferred by will or the laws of descent and distribution. 
 (c)    Misconduct. The Options will terminate in
their entirety, regardless of whether the Options are then exercisable, immediately upon your discharge from Service for Cause, or upon your commission of any of the following acts during the exercise period following your termination of Service:
(i) fraud on or misappropriation of any funds or property of the Company, or (ii) your breach of any provision of any employment, non-disclosure,
non-competition, non-solicitation, assignment of inventions, or other similar agreement executed by you for the benefit of the Company, as determined by the
Administrator, which determination will be conclusive. 
 (d)    Changes in Status. If you cease to be a
“common law employee” of the Company but you continue to provide bona fide services to the Company following such cessation in a different capacity, including without limitation as a director, consultant or independent contractor, then a
termination of Service shall not be deemed to have occurred for purposes of this Section 3 upon such change in capacity. Notwithstanding the foregoing, the Options shall not be treated as incentive stock options within the meaning of Code
section 422 with respect to any exercise that occurs more than three months after such cessation of the common law employee relationship (except as otherwise permitted under Code section 421 or 422). In the event that your Service is with
a business, trade or entity that, after the Grant Date, ceases for any reason to be part or an Affiliate of the Company, your Service will be deemed to have terminated for purposes of this Section 3 upon such cessation if your Service does not
continue uninterrupted immediately thereafter with the Company or an Affiliate of the Company. 
 4.    Market Stand-Off Agreement. You agree that following the effective date of a registration statement of the Company filed under the Securities Act of 1933, you, for the duration specified by and to the extent requested
by the Company and an underwriter of Common Stock or other securities of the Company, shall not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any equity securities of the Company, or any securities
convertible into or exchangeable or exercisable for such securities, enter into a transaction which would have the same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences
of ownership of such securities, whether any such aforementioned transaction is to be settled by delivery of such securities or other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or
disposition, or to enter into any such transaction, swap, hedge or other arrangement, in each case during the seven days prior to and the 180 days after the effectiveness of any underwritten offering of the Company’s equity securities (or such
longer or shorter period as may be requested in writing by the managing underwriter and agreed to in writing by the Company) (the “Market Stand-Off Period”), except as part of such
underwritten registration if otherwise permitted. In addition, you agree to execute any further letters, agreements and/or other documents requested by the Company or its underwriters that are consistent with the terms of this Section 4. The
Company may impose stop-transfer instructions with respect to securities subject to the foregoing restrictions until the end of such Market Stand-Off Period. 

5.    Nontransferability of Options. These Options and, before exercise, the underlying Shares are nontransferable
otherwise than by will or the laws of descent and distribution and, during your lifetime, the Options may be exercised only by you or, during the period you are under a legal disability, by your guardian or legal representative. Except as provided
above, the Options and, before exercise, the underlying Shares may not be assigned, transferred, pledged, hypothecated, subjected to any “put equivalent position,” “call equivalent position” (as each preceding term is defined by Rule 16(a)-1 under the Securities Exchange Act of 1934), or short position, or disposed of in any way (whether by operation of law or otherwise) and shall not be subject to execution, attachment or similar
process. 

 6.    Qualified Nature of the Options. 

(a)    General Status. The Options are intended to qualify as incentive stock options within the meaning of Code
section 422 (“Incentive Stock Options”), to the fullest extent permitted by Code section 422, and this Agreement shall be so construed. The Company, however, does not warrant any particular tax consequences of the
Options. Code section 422 provides limitations, not set forth in this Agreement, respecting the treatment of the Options as Incentive Stock Options. You should consult with your personal tax advisors in this regard. 

(b)    Code Section 422(d) Limitation. Pursuant to Code section 422(d), the aggregate fair
market value (determined as of the Grant Date) of shares of Common Stock with respect to which all Incentive Stock Options first become exercisable by you in any calendar year under the Plan or any other plan of the Company (and its parent and
subsidiary corporations, within the meaning of Code section 424(e) and (f), as may exist from time to time) may not exceed $100,000 or such other amount as may be permitted from time to time under Code section 422. To the extent that such
aggregate fair market value exceeds $100,000 or other applicable amount in any calendar year, such stock options will be treated as nonstatutory stock options with respect to the amount of aggregate fair market value thereof that exceeds the Code
section 422(d) limit. For this purpose, the Incentive Stock Options will be taken into account in the order in which they were granted. In such case, the Company may designate the shares of Common Stock that are to be treated as stock acquired
pursuant to the exercise of Incentive Stock Options and the shares of Common Stock that are to be treated as stock acquired pursuant to nonstatutory stock options by issuing separate certificates for such shares and identifying the certificates as
such in the stock transfer records of the Company. 
 (c)    Significant Stockholders. Notwithstanding anything
in this Agreement or the Stock Option Notice to the contrary, if you own, directly or indirectly through attribution, stock possessing more than 10% of the total combined voting power of all classes of stock of the Company or of any of its
subsidiaries (within the meaning of Code section 424(f)) on the Grant Date, then the Exercise Price is the greater of (i) the Exercise Price stated on the Stock Option Notice or (ii) 110% of the Fair Market Value of the Common Stock
on the Grant Date, and the Expiration Date is the last business day prior to the fifth (5th) anniversary of the Grant Date. 

(d)    Disqualifying Dispositions. If you make a disposition (as that term is defined in Code section 424(c))
of any Shares acquired pursuant to the Options within two years of the Grant Date or within one year after the Shares are transferred to you, you must notify the Company of such disposition in writing within 30 days of the disposition. The
Administrator may, in its discretion, take reasonable steps to ensure notification of such dispositions, including but not limited to requiring that Shares acquired under the Options be held in an account with a Company-designated broker-dealer
until they are sold. 
 7.    Withholding of Taxes. 

(a)    At the time the Options are exercised, in whole or in part, or at any time thereafter as requested by the Company,
you hereby authorize withholding from payroll or any other payment of any kind due to you and otherwise agree to make adequate provision for foreign, federal, state and local taxes required by law to be withheld, if any, which arise in connection
with the Options (including upon a disqualifying disposition within the meaning of Code section 421(b)). The Company may require you to make a cash payment to cover any withholding tax obligation as a condition of exercise of the Options or
issuance of share certificates representing Shares. 
 (b)    The Administrator may, in its sole discretion, permit you
to satisfy, in whole or in part, any withholding tax obligation which may arise in connection with the Options either by electing to have the Company withhold from the Shares to be issued upon exercise that number of Shares, or by electing to
deliver to the Company already-owned shares, in either case having a Fair Market Value not in excess of the amount necessary to satisfy the statutory minimum withholding amount due. 

8.    Adjustments. The Administrator may make various adjustments to your Options, including adjustments to the
number and type of securities subject to the Options and the Exercise Price, in accordance with the terms of the Plan. In the event of any transaction resulting in a Change in Control (as defined in the Plan) of the Company, the outstanding Options
will terminate in accordance with the terms of Section 7(d)(iii) of the Plan. 

 9.    Purchase Right of the Company. At any time and for any
reason, the Company may purchase the Options, in whole or in part, from you. The Administrator shall provide you with written notice of the Company’s intention to exercise this purchase right, specifying the number of Options to which the
purchase right shall be applied. The purchase price per Option shall be the difference between (a) the Exercise Price per Share and (b) the Fair Market Value per Share, determined as of the date immediately preceding the date settlement
occurs. Settlement of the purchase will be made within thirty days after delivery of such written notice. In the discretion of the Administrator, payment of the purchase price will be made via cash, a promissory note, or a combination of the two.
Any such promissory note will provide for substantially equal installments, payable at least annually, over a period not to exceed five years and shall accrue interest at the applicable Federal mid-term rate
in effect under Code section 1274(d) as of the settlement date, compounded semi-annually. The Options will be automatically terminated, and of no further force and effect, as of the settlement date with respect to the number of Options so
purchased. 
 10.    Non-Guarantee of Employment or Service Relationship.
Nothing in the Plan or this Agreement will alter your at-will or other employment status or other service relationship with the Company, nor be construed as a contract of employment or service relationship
between you and the Company, or as a contractual right for you to continue in the employ of, or in a service relationship with, the Company for any period of time, or as a limitation of the right of the Company to discharge you at any time with or
without Cause or notice and whether or not such discharge results in the failure of any of the Options to become exercisable or any other adverse effect on your interests under the Plan. 

11.    No Rights as a Stockholder. You shall not have any of the rights of a stockholder with respect to the Shares
until such Shares have been issued to you upon the due exercise of the Options. No adjustment will be made for dividends or distributions or other rights for which the record date is prior to the date such Shares are issued. 

12.    The Company’s Rights. The existence of the Options shall not affect in any way the right or power of
the Company or its stockholders to make or authorize any or all adjustments, recapitalizations, reorganizations or other changes in the Company’s capital structure or its business, or any merger or consolidation of the Company, or any issue of
bonds, debentures, preferred or other stocks with preference ahead of or convertible into, or otherwise affecting the Common Stock or the rights thereof, or the dissolution or liquidation of the Company, or any sale or transfer of all or any part of
the Company’s assets or business, or any other corporate act or proceeding, whether of a similar character or otherwise. 

13.    Entire Agreement. This Agreement, together with the correlating Stock Option Notice and the Plan, contain
the entire agreement between you and the Company with respect to the Options. Any oral or written agreements, representations, warranties, written inducements, or other communications made prior to the execution of this Agreement with respect to the
Options shall be void and ineffective for all purposes. 
 14.    Amendment. This Agreement may be amended from
time to time by the Administrator in its discretion; provided, however, that this Agreement may not be modified in a manner that would have a materially adverse effect on the Options or Shares as determined in the discretion of the Administrator,
except as provided in the Plan or in a written document signed by you and the Company. 
 15.    Conformity with
Plan. This Agreement is intended to conform in all respects with, and is subject to all applicable provisions of, the Plan. Any conflict between the terms of this Agreement and the Plan shall be resolved in accordance with the terms of the Plan.
In the event of any ambiguity in this Agreement or any matters as to which this Agreement is silent, the Plan shall govern. A copy of the Plan is provided to you with this Agreement. 

 16.    Section 409A. This Agreement and the Options granted
hereunder are intended to comply with, or otherwise be exempt from, Section 409A of the Code. Nothing in the Plan or this Agreement shall be construed as including any feature for the deferral of compensation other than the deferral of
recognition of income until the exercise of the Options. Should any provision of the Plan or this Agreement be found not to comply with, or otherwise be exempt from, the provisions of Section 409A of the Code, it may be modified and given
effect, in the sole discretion of the Administrator and without requiring your consent, in such manner as the Administrator determines to be necessary or appropriate to comply with, or to effectuate an exemption from, Section 409A of the Code.
The foregoing, however, shall not be construed as a guarantee by the Company of any particular tax effect to you. 

17.    Electronic Delivery of Documents. By your signing the Notice, you (a) consent to the electronic
delivery of this Agreement, all information with respect to the Plan and the Options, and any reports of the Company provided generally to the Company’s stockholders; (b) acknowledge that you may receive from the Company a paper copy of
any documents delivered electronically at no cost to you by contacting the Company by telephone or in writing; (c) further acknowledge that you may revoke your consent to the electronic delivery of documents at any time by notifying the Company
of such revoked consent by telephone, postal service or electronic mail; and (d) further acknowledge that you understand that you are not required to consent to electronic delivery of documents. 

18.    No Future Entitlement. By execution of the Notice, you acknowledge and agree that: (a) the grant of
these Options is a one-time benefit which does not create any contractual or other right to receive future grants of stock options, or compensation in lieu of stock options, even if stock options have been
granted repeatedly in the past; (b) all determinations with respect to any such future grants, including, but not limited to, the times when stock options shall be granted or shall become exercisable, the maximum number of shares subject to
each stock option, and the purchase price, will be at the sole discretion of the Administrator; (c) the value of these Options is an extraordinary item of compensation which is outside the scope of your employment contract, if any; (d) the
value of these Options is not part of normal or expected compensation or salary for any purpose, including, but not limited to, calculating any termination, severance, resignation, redundancy, end of service payments or similar payments, or bonuses,
long-service awards, pension or retirement benefits; (e) the vesting of these Options ceases upon termination of employment with the Company or transfer of employment from the Company, or other cessation of eligibility for any reason, except as
may otherwise be explicitly provided in this Agreement; (f) if the underlying Common Stock does not increase in value, these Options will have no value, nor does the Company guarantee any future value; and (g) no claim or entitlement to
compensation or damages arises if these Options do not increase in value and you irrevocably release the Company from any such claim that does arise. 

19.    Personal Data. For the purpose of implementing, administering and managing these Options, you, by execution
of the Notice, consent to the collection, receipt, use, retention and transfer, in electronic or other form, of your personal data by and among the Company and its third party vendors or any potential party to any Change in Control transaction or
capital raising transaction involving the Company. You understand that personal data (including but not limited to, name, home address, telephone number, employee number, employment status, social security number, tax identification number, date of
birth, nationality, job and payroll location, data for tax withholding purposes and shares awarded, cancelled, exercised, vested and unvested) may be transferred to third parties assisting in the implementation, administration and management of
these Options and the Plan and you expressly authorize such transfer as well as the retention, use, and the subsequent transfer of the data by the recipient(s). You understand that these recipients may be located in your country or elsewhere, and
that the recipient’s country may have different data privacy laws and protections than your country. You understand that data will be held only as long as is necessary to implement, administer and manage these Options. You understand that you
may, at any time, request a list with the names and addresses of any potential recipients of the personal data, view data, request additional information about the storage and processing of data, require any necessary amendments to data or refuse or
withdraw the consents herein, in any case without cost, by contacting in writing the Company’s Secretary. You understand, however, that refusing or withdrawing your consent may affect your ability to accept a stock option. 

 20.    Risk and Financial Information Disclosure. For purposes of
claiming an exemption from registration under Rule 12h-1(f)(1) under the Securities Exchange Act of 1934, the Company may decide to provide you, every six months, with the information described in
Rules 701(e)(3), (4), and (5) under the Securities Act of 1933 (risk and financial information relating to the Company), with any such financial statements being not more than 180 days old. Any such information may be provided either
by physical or electronic delivery or by written notice of the availability of the information on an Internet site that may be password-protected and of any password needed to access the information. You may be required to execute an agreement to
keep the information confidential as a condition precedent to the provision of the information. Any such agreement shall be executed in such manner and form as the Administrator may require from time to time. Notwithstanding the foregoing, the
Company shall have no initial or continuing obligation to provide you with the information described in this Section 20, except as otherwise required by applicable law. 

21.    Governing Law. The validity, construction, and effect of this Agreement, and of any determinations or
decisions made by the Administrator relating to this Agreement, and the rights of any and all persons having or claiming to have any interest under this Agreement, shall be determined exclusively in accordance with the laws of the State of Delaware,
without regard to its provisions concerning the applicability of laws of other jurisdictions. Any suit with respect hereto will be brought in the federal or state courts in the district which includes the city or town in which the Company’s
principal executive office is located, and you hereby agree and submit to the personal jurisdiction and venue thereof. 

22.    Headings. The headings in this Agreement are for reference purposes only and shall not affect the meaning or
interpretation of this Agreement. 
 {Glossary begins on next page} 

 GLOSSARY 

(a)    “Affiliate” has the meaning set forth in the Plan. 

(b)    “Cause” has the meaning ascribed to such term or words of similar import in your written
employment or service contract with the Company as in effect at the time at issue and, in the absence of such agreement or definition, means your (i) conviction of, or plea of nolo contendere to, a felony or crime involving moral turpitude;
(ii) fraud on or misappropriation of any funds or property of the Company, any affiliate, customer or vendor; (iii) personal dishonesty, incompetence, willful misconduct, willful violation of any law, rule or regulation (other than minor
traffic violations or similar offenses) or breach of fiduciary duty which involves personal profit; (iv) willful misconduct in connection with your duties or willful failure to perform your responsibilities in the best interests of the Company;
(v) illegal use or distribution of drugs; (vi) violation of any Company rule, regulation, procedure or policy; or (vii) breach of any provision of any employment, non-disclosure, non-competition, non-solicitation or other similar agreement executed by you for the benefit of the Company, all as determined by the Administrator, which determination will
be conclusive. 
 (c)    “Change in Control” has the meaning set forth in the Plan. 

(d)    “Code” means the Internal Revenue Code of 1986, as amended. 

(e)    “Company” includes Datadog, Inc. and its Affiliates, except where the context otherwise
requires. For purposes of determining whether a Change in Control has occurred, Company shall mean only Datadog, Inc. 

(f)    “Fair Market Value” of a share of Common Stock generally means either the closing price or
the average of the high and low sale price per share of Common Stock on the relevant date, as determined in the Administrator’s discretion, as reported by the principal market or exchange upon which the Common Stock is listed or admitted for
trade. Refer to the Plan for a detailed definition of Fair Market Value, including how Fair Market Value is determined in the event that no sale of Common Stock is reported on the relevant date. 

(g)    “Service” means your employment or other service relationship with the Company and its
Affiliates. Your Service will be considered to have ceased with the Company and its Affiliates if, immediately after a sale, merger or other corporate transaction, the trade, business or entity with which you are employed or otherwise have a service
relationship is not the Company or its successor or an Affiliate of the Company or its successor. 

(h)    “Shares” mean the shares of Common Stock underlying the Options. 

(i)    “Stock Option Notice” means the written notice evidencing the award of the Options that
correlates with and makes up a part of this Agreement. 
 (j)    “Total and Permanent
Disability” means the inability 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 twelve months. The Administrator may require such proof of Total and Permanent Disability as the Administrator in its sole discretion deems appropriate and the Administrator’s good faith determination as
to whether you are totally and permanently disabled will be final and binding on all parties concerned. 

 (k)    “You”; “Your”.
“You” or “your” means the recipient of the award of Options as reflected on the Stock Option Notice. Whenever the Agreement refers to “you” under circumstances where the provision should logically be
construed, as determined by the Administrator, to apply to your estate, personal representative, or beneficiary to whom the Options may be transferred by will or by the laws of descent and distribution, the word “you” shall be deemed to
include such person. 

 EXERCISE FORM 

Administrator of Datadog, Inc. 2012 Equity Incentive Plan 
 c/o
Office of the Corporate Secretary 
 Datadog, Inc. 

	
	   

	   

 Dear Corporate Secretary: 

I hereby exercise the Options granted to me on __________________, ____________, by Datadog, Inc. (the “Company”),
subject to all the terms and provisions of the applicable grant agreement and of the Datadog, Inc. 2012 Equity Incentive Plan (the “Plan”), and notify you of my desire to purchase __________ shares of Common Stock of the
Company at a price of $_____ per share pursuant to the exercise of said Options. 
 This will confirm my understanding with respect to the
shares to be issued to me by reason of this exercise of the Options (the shares to be issued pursuant hereto shall be collectively referred to hereinafter as the “Shares”) as follows: 

(a)    I am purchasing the Shares for my own account for investment only, and not with a view to, or for sale in connection
with, any distribution of the Shares in violation of the Securities Act of 1933 (the “Securities Act”), or any rule or regulation under the Securities Act. 

(b)    I understand that the Shares are being issued without registration under the Securities Act, in reliance upon one or
more exemptions contained in the Securities Act, and such reliance is based in part on the above representation. I also understand that the Company is not obligated to comply with the registration requirements of the Securities Act or with the
requirements for an exemption under Regulation A under the Securities Act for my benefit. 
 (c)    I have had such
opportunity as I deemed adequate to obtain from representatives of the Company such information as is necessary to permit me to evaluate the merits and risks of my investment in the Company. 

(d)    I have sufficient experience in business, financial and investment matters to be able to evaluate the risks involved
in the purchase of the Shares and to make an informed investment decision with respect to such purchase. 
 (e)    I can
afford a complete loss of the value of the Shares and am able to bear the economic risk of holding such Shares for an indefinite period. 

(f)    I understand that (i) the Shares have not been registered under the Securities Act and are “restricted
securities” within the meaning of Rule 144 under the Securities Act; (ii) the Shares cannot be sold, transferred or otherwise disposed of unless they are subsequently registered under the Securities Act or an exemption from
registration is then available and, therefore, they may need to be held indefinitely; and (iii) there is now no registration statement on file with the Securities and Exchange Commission with respect to any stock of the Company and the Company
has no obligation or current intention to register the Shares under the Securities Act. As a condition to any transfer of the Shares, I understand that the Company may require an opinion of counsel satisfactory to the Company to the effect that such
transfer does not require registration under the Securities Act or any state securities law. 

 (g)    I understand that the certificates for the Shares to be issued to
me will bear a legend substantially as follows: 
 The shares of stock represented by this certificate are subject to restrictions on
transfer, an option to purchase and a market stand-off agreement set forth in a certain Stock Restriction Agreement (the “Agreement”) between the corporation and the registered owner of
this certificate (or his or her predecessor in interest), and no transfer of such shares may be made without compliance with the Agreement. A copy of the Agreement is available for inspection at the office of the corporation upon appropriate request
and without charge. 
 The securities represented by this stock certificate have not been registered under the Securities Act of 1933 (the
“Act”) or applicable state securities laws (the “State Acts”), and shall not be sold, pledged, hypothecated, donated, or otherwise transferred (whether or not for consideration) by the holder except
upon the issuance to the corporation of a favorable opinion of its counsel and/or submission to the corporation of such other evidence as may be satisfactory to counsel for the corporation, to the effect that any such transfer shall not be in
violation of the Act and the State Acts. 
 The Company will issue appropriate stop transfer instructions to its transfer agent. 

(h)    I am a party to a Grant Agreement and a Stock Restriction Agreement with the Company, pursuant to which I have
agreed to certain restrictions on the transferability of the Shares and other matters relating thereto. 
 Total Amount Enclosed: $___________ 

 

									
	Date:	 	      
	 	            	 	      

		 		 		 	(Optionee)
				
		 		 		 	Received by DATADOG, INC. on
				
		 		 		 	
                          
                                      ,
        

									
					
		 		 		 	 By:
	 	  

 Exhibit L 

Nonstatutory Stock Option Documents 

 NOT FOR USE WITH CA RESIDENTS 

DATADOG, INC. 

INCENTIVE STOCK OPTION NOTICE 

This Nonstatutory Stock Option Notice (this “Notice”) evidences the award of nonstatutory stock options (each, an
“Option” or collectively, the “Options”) that have been granted to you, [NAME],
subject to and conditioned upon your agreement to the terms of the attached Nonstatutory Stock Option Grant Agreement (the “Grant Agreement”). The Options entitle you to purchase shares of common stock, par value $0.00001 per
share (“Common Stock”), of Datadog, Inc., a Delaware corporation (the “Company”), under the Datadog, Inc. 2012 Equity Incentive Plan (the “Plan”). The number of shares you may
purchase and the exercise price at which you may purchase them are specified below. This Notice constitutes part of and is subject to the terms and provisions of the Grant Agreement and the Plan, which are incorporated by reference herein. You
must return an executed copy of this Notice to the Company within 30 days of the date hereof. If you fail to do so, the Options may be rendered null and void in the Company’s discretion. 

Grant Date: [GRANT DATE]

 Vesting Base Date: [VESTING BASE DATE] 
 Number of Options: [NUMBER] Options, each permitting the purchase of one Share 
 Exercise Price: [PRICE] per share 

Expiration Date: The Options expire at 5:00 p.m. Eastern Time on the ten-year anniversary of the Grant Date
(the “Expiration Date”), unless fully exercised or terminated earlier. 
 Exercisability
Schedule:    Subject to the terms and conditions described in the Agreement, the Options become exercisable in accordance with the schedule below: 
  

	(a)	 [_____]% of the Options become exercisable on the first
anniversary of the Vesting Base Date (the “Initial Vesting Date”), and 

  

	(b)	 [_____]% of the Options become exercisable on the date [____] after the Initial Vesting Date and on such date every [_______] thereafter, through the [______] anniversary of
the Vesting Base Date. 

 The extent to which the Options are exercisable as of a particular date is rounded down to the nearest whole
share. However, exercisability is rounded up to 100% on the [_____] anniversary of the Vesting Base Date. 

 

			
	 DATADOG, INC.

		
	By:	 	 
		 	Name:
		 	Title:

 I acknowledge that I have carefully read the attached Agreement and the Plan and agree to be bound by all of the
provisions set forth in these documents. 
  

									
	Enclosures:	 	 Nonstatutory Stock Option Grant Agreement

Datadog, Inc. 2012 Equity Incentive Plan
 Stock
Restriction Agreement
 Exercise Form
	 		 	OPTIONEE
		 		 		 	      

		 		 		 	Date:	 	      

 NONSTATUTORY STOCK OPTION
GRANT AGREEMENT 
 UNDER THE 

DATADOG, INC. 2012 EQUITY INCENTIVE PLAN 

1.    Terminology. Capitalized terms used in this Agreement are defined in the correlating Stock Option Notice
and/or the Glossary at the end of the Agreement. 
 2.    Exercise of Options. 

(a)    Exercisability. The Options will become exercisable in accordance with the Exercisability Schedule set forth
in the Stock Option Notice, so long as you are in the Service of the Company from the Grant Date through the applicable exercisability dates. None of the Options will become exercisable after your Service with the Company ceases, unless the Stock
Option Notice provides otherwise with respect to exercisability that arises as a result of your cessation of Service. 

(b)    Right to Exercise. You may exercise the Options, to the extent exercisable, at any time on or before
5:00 p.m. Eastern Time on the Expiration Date or the earlier termination of the Options, unless otherwise provided under applicable law. Notwithstanding the foregoing, if at any time the Administrator determines that the delivery of Shares
under the Plan or this Agreement is or may be unlawful under the laws of any applicable jurisdiction, or Federal, state or foreign securities laws, the right to exercise the Options or receive Shares pursuant to the Options shall be suspended until
the Administrator determines that such delivery is lawful. If at any time the Administrator determines that the delivery of Shares under the Plan or this Agreement is or may violate the rules of the national securities exchange on which the shares
are then listed for trade, the right to exercise the Options or receive Shares pursuant to the Options shall be suspended until the Administrator determines that such exercise or delivery would not violate such rules. Section 3 below describes
certain limitations on exercise of the Options that apply in the event of your death, Total and Permanent Disability, or termination of Service. The Options may be exercised only in multiples of whole Shares and may not be exercised at any one time
as to fewer than one hundred Shares (or such lesser number of Shares as to which the Options are then exercisable). No fractional Shares will be issued under the Options. 

(c)    Exercise Procedure. In order to exercise the Options, you must provide the following items to the Secretary
of the Company or his or her delegate before the expiration or termination of the Options: 
  

	 	(i)	 notice, in such manner and form as the Administrator may require from time to time, specifying the number of
Shares to be purchased under the Options; 

  

	 	(ii)	 full payment of the Exercise Price for the Shares or properly executed, irrevocable instructions, in such
manner and form as the Administrator may require from time to time, to effectuate a broker-assisted cashless exercise, each in accordance with Section 2(d) of this Agreement; 

 

	 	(iii)	 full payment of applicable withholding taxes pursuant to Section 9 of this Agreement; and

  

	 	(iv)	 an executed copy of any other agreements requested by the Administrator pursuant to Section 2(e) of this
Agreement. 

 An exercise will not be effective until the Secretary of the Company or his or her delegate receives all of
the foregoing items, and such exercise otherwise is permitted under and complies with all applicable Federal, state and foreign securities laws. Notwithstanding the foregoing, if the Administrator permits payment by means of delivering properly
executed, irrevocable instructions, in such manner and form as the Administrator may require from time to time, to effectuate a broker-assisted cashless exercise and such instructions provide for sale of Shares under a limit order rather than at the
market, the exercise will not be effective until the earlier of the date the Company receives delivery of cash or cash equivalents in full payment of the Exercise Price or the date the Company receives confirmation from the brokerage firm that the
sale instruction has been fulfilled, and the exercise will not be effective unless the earlier of such dates occurs on or before termination of the Options. 

(d)    Method of Payment. You may pay the aggregate Exercise Price by: 

 

	 	(i)	 delivery of cash, certified or cashier’s check, money order or other cash equivalent acceptable to the
Administrator in its discretion; 

  

	 	(ii)	 a broker-assisted cashless exercise in accordance with Regulation T of the Board of Governors of the Federal
Reserve System through a brokerage firm designated or approved by the Administrator; 

  

	 	(iii)	 subject to such limits as the Administrator may impose from time to time, tender (via actual delivery or
attestation) to the Company of other shares of Common Stock of the Company which have a Fair Market Value on the date of tender equal to the Exercise Price; 

  

	 	(iv)	 any other method approved by the Administrator; or 

 

	 	(v)	 any combination of the foregoing. 

(e)    Agreement to Execute Other Agreements. You agree to execute, as a condition precedent to the exercise of the
Options and at any time thereafter as may reasonably be requested by the Administrator, a Stock Restriction Agreement substantially in the form, and containing the terms and provisions, of the Stock Restriction Agreement attached hereto as Exhibit
A, with respect to any shares you acquire pursuant to this Agreement; provided, however, that execution of the Stock Restriction Agreement will not be required upon any exercise that occurs after the closing of the first public offering of capital
stock of the Company that is effected pursuant to a registration statement filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act of 1933 or, if later, the expiration of any market stand-off agreement that applies to other stockholders of the Company respecting such public offering of capital stock. 

(f)    Issuance of Shares upon Exercise. The Company shall issue to you the Shares underlying the Options you
exercise as soon as practicable after the exercise date, subject to the Company’s receipt of the aggregate Exercise Price and the requisite withholding taxes, if any. Upon issuance of such Shares, the Company may deliver, subject to the
provisions of Section 9 below, such Shares on your behalf electronically to the Company’s designated stock plan administrator or such other broker-dealer as the Company may choose at its sole discretion, within reason, or may retain such
Shares in uncertificated book-entry form. Any share certificates delivered will, unless the Shares are registered or an exemption from registration is available under applicable Federal and state law, bear a legend restricting transferability of
such Shares and referencing any applicable Stock Restriction Agreement. 
 3.    Termination of Service. 

(a)    Termination of Unexercisable Options. If your Service with the Company ceases for any reason, the Options
that are then unexercisable will terminate immediately upon such cessation. 

 (b)    Exercise Period Following Termination of Service. If your
Service with the Company ceases for any reason other than discharge for Cause, the Options that are then exercisable will terminate upon the earliest of: 
  

	 	(i)	 the expiration of 90 days following such cessation, if your Service ceases on account of (1) your
termination by the Company other than a discharge for Cause, or (2) your voluntary termination other than for Total and Permanent Disability or death; 

  

	 	(ii)	 the expiration of 12 months following such cessation, if your Service ceases on account of your Total and
Permanent Disability or death; 

  

	 	(iii)	 the expiration of 12 months following your death, if your death occurs during the periods described in
clauses (i) or (ii) of this Section 3(b), as applicable; or 

  

	 	(iv)	 the Expiration Date. 

In the event of your death, the exercisable Options may be exercised by your executor, personal representative, or the person(s) to whom the Options are
transferred by will or the laws of descent and distribution. 
 (c)    Misconduct. The Options will terminate in
their entirety, regardless of whether the Options are then exercisable, immediately upon your discharge from Service for Cause, or upon your commission of any of the following acts during the exercise period following your termination of Service:
(i) fraud on or misappropriation of any funds or property of the Company, or (ii) your breach of any provision of any employment, non-disclosure,
non-competition, non-solicitation, assignment of inventions, or other similar agreement executed by you for the benefit of the Company, including without limitation this
Agreement, as determined by the Administrator, which determination will be conclusive. 
 (d)    Change in
Status. In the event that your Service is with a business, trade or entity that, after the Grant Date, ceases for any reason to be part or an Affiliate of the Company, your Service will be deemed to have terminated for purposes of this
Section 3 upon such cessation if your Service does not continue uninterrupted immediately thereafter with the Company or an Affiliate of the Company. 

4.    Optionee Covenants. In consideration of the Options granted to the Optionee pursuant to this Agreement and
the service relationship (continuing or otherwise) of the Optionee with the Company, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and in recognition of the Company’s legitimate purpose
of protecting its confidential information, assets and goodwill by avoiding unauthorized disclosure of the Company’s confidential information at any time, the Optionee agrees and covenants as follows: 

(a)    Definitions. 

(i)    As used herein “Customers” means all past, current and prospective persons, firms or
entities that have either sought or received products, goods or services from the Company, have contacted the Company for the purpose of seeking products, goods or services or have been contacted by the Company for the purpose of providing products,
goods or services during his employment or other service relationship, and all persons, firms, or entities subject to the control of those persons, firms, or entities. The Customers covered by this Agreement shall include, but not be limited to, any
Customer or potential Customer of the Company at any time during Optionee’s employment or other service relationship with the Company, whether or not Optionee had any personal contact or relationship with such individuals or entities. 

(ii)    As used herein, “Confidential Information” means all information, whether or not in
writing, of a private, secret or confidential nature, concerning the Company, including without limitation, its 

 
business, business relationships, financial affairs, technology and inventions, including without limitation, information about the Company’s methods of operation, manufacturing, selling,
marketing, promoting or otherwise providing products, goods or services, financial data, personnel data, the existence and identity of existing or potential Customers, suppliers, officers, directors, agents, vendors, owners, stockholders,
contractors, partners, representatives, advisors, and consultants of the Company or any contractual relationships or arrangements with third parties. 

(b)    Nondisclosure of Confidential Information. Optionee recognizes, acknowledges and agrees that: 

(i)    Confidential Information was developed by the Company at considerable expense, that this information is a valuable
Company asset and part of its goodwill, that this information is vital to the Company’s success and is the sole property of the Company; 

(ii)    during Optionee’s employment or other service relationship with the Company, Optionee will have access to,
come into possession of, work with and become familiar with the Company’s Confidential Information; that the Optionee may be called upon to establish close relationships with the Company’s Customers, suppliers, and employees of the
Company; and that the success of the Company’s business depends in large part on Optionee’s personal conduct in contacting and establishing relationships with Customers, suppliers and employees of the Company; 

(iii)    the value to Optionee of the enhancement of Optionee’s professional experience and credentials by virtue of
Optionee’s employment or other service relationship with the Company; 
 (iv)    during Optionee’s employment
or other service relationship and following the termination thereof, whether voluntary or involuntary, whether with or without cause, and whether with or without notice, Optionee will not, on Optionee’s own behalf or as a partner, officer,
director, employee, agent, advisor or consultant of any other person or entity, directly or indirectly, disclose the Company’s Confidential Information to any person or entity other than agents of the Company, and Optionee will not use or aid
others in obtaining or using any such Confidential Information without the express written permission of the Chief Executive Officer of the Company; 

(v)    use or disclosure of such Confidential Information, other than as specifically permitted under this Agreement,
might reasonably be construed to be contrary to the interests of the Company and Optionee will not use or disclose to others any such Confidential Information of the Company except for the benefit of the Company in connection with the performance of
Optionee’s employment or other service relationship with the Company; 
 (vi)    Optionee will immediately inform
the Company of any unauthorized disclosures of Confidential Information that come to Optionee’s attention. 

(vii)    the obligations under this Section with respect to the Confidential Information will survive the termination of
his employment or service relationship with the Company unless and until such Confidential Information becomes public knowledge and becomes matter in the public domain through no act or omission by Optionee; 

(viii)    all files, letters, memoranda, reports, records, data, sketches, drawings, laboratory notebooks, program
listings, display screen printouts or other written, photographic, or other tangible material containing Confidential Information, whether created by Optionee or others, which shall come into Optionee’s custody or possession, shall be and are
the exclusive property of the Company; and Optionee will deliver to the Company all such materials and copies thereof and all tangible property of the Company in Optionee’s custody or possession upon the earlier of (a) a request by the
Company or (b) termination of Optionee’s service relationship with the Company, whether voluntary or involuntary, whether with or without cause, and whether with or without notice; and 

 (ix)    the obligations under this Section with respect to the
Confidential Information also extend to such similar types of information, materials and tangible property of the Customers of and suppliers to the Company, as well as other third parties who may have disclosed or entrusted the same to Optionee or
the Company. 
 (c)    Nonsolicitation. During the period of Optionee’s employment or other service
relationship with the Company, and for a period of 12 months after the termination or expiration thereof for any reason, whether voluntary or involuntary, whether with or without cause, whether with or without notice and without limiting the
applicability of any other provisions of this Agreement that are intended to operate after such termination or expiration, Optionee recognizes, acknowledges and agrees that Optionee will not, directly or indirectly (other than as the holder of not
more than 1% of the total outstanding stock of a publicly held company), either on Optionee’s own behalf or as an owner, stockholder, partner, member, participant, officer, director, employee, agent, representative, advisor or consultant of any
other individual, entity or enterprise, do or attempt to do any of the following: 
 (i)    solicit, encourage or induce
any current or prospective Customers, suppliers, vendors or contractors of the Company to terminate or adversely modify any business relationship with the Company or not to proceed with, enter into, renew or continue any business relationship with
the Company, or otherwise interfere with any business relationship between the Company and any such person; or 

(ii)    solicit, encourage or induce any current or prospective Customers to purchase, or otherwise contract for, any
products, goods or services the same as or similar to any of the products, goods or services sold, provided, promoted, marketed or offered by the Company; or 

(iii) solicit, encourage or induce any officer, director, employee, agent, partner, consultant or independent contractor of the Company to
terminate an employment or relationship with the Company, supervise, employ or engage any such person, or otherwise interfere with or disrupt the Company’s relationship with any such person; or 

(iv)    engage in any act involving dishonesty, bad faith or lack of integrity or candor with respect to the Company,
including, without limitation, disparaging the Company or any of its directors, officers, consultants, employees or stockholders. 

(d)    Assignment. Optionee will promptly disclose and describe to the Company all Inventions (as defined below)
made, conceived, developed or reduced to practice, whether jointly or with others, within the scope of Optionee’s employment or other service relationship with the Company (hereafter, “Company Inventions”). Optionee
hereby assigns and will assign to Company or Company’s designee all of Optionee’s right, title and interest in and to any and all Company Inventions. For purposes of this Agreement, “Inventions” means all
discoveries, designs, developments, improvements, inventions (whether or not protectable under patent laws), works of authorship, information fixed in any tangible medium of expression (whether or not protectable under copyright laws), trade
secrets, know-how, ideas (whether or not protectable under trade secret laws), mask works, trademarks, service marks, trade names and trade dress. 

 (e)    Enforceability. If any restriction set forth in this
Section 4 is found by any court of competent jurisdiction to be unenforceable because it extends for too long a period of time or over too great a range of activities or in too broad a geographic area, it will be interpreted to extend only over
the maximum period of time, range of activities and/or geographic area as to which it may be enforceable. 

(f)    Acknowledgement as to Reasonableness. Optionee recognizes, acknowledges and agrees that if his employment or
other service relationship with the Company terminates for any valid or other reason, Optionee can earn a livelihood without violating any of the restrictions contained in this Section 4. Optionee also recognizes, acknowledges and agrees that
the Company’s business, with and through any person or entity which directly or indirectly controls, is controlled by, or is under common control with the Company, including any parent of the Company or subsidiary of the Company, is national in
scope and that the time period and scope of the foregoing restrictions are reasonable and necessary for the protection of the Company’s valid business interests. 

(g)    Termination of Options/Recapture Payment. The Optionee further recognizes and acknowledges that it would be
difficult to ascertain the damages arising from a violation of the covenants set forth in this Section 4. Accordingly, notwithstanding anything herein to the contrary, if the Administrator or its delegate, in its sole discretion, determines
that the Optionee has engaged in any activity that contravenes the covenants set forth in this Section 4, the Optionee agrees that the following shall occur: 

(i)    The Options will terminate effective on the date on which such determination is made, regardless of whether the
Options are vested in whole or in part, unless terminated sooner by operation of another provision of this Agreement; and 

(ii)    With respect to any Common Stock acquired by the Optionee through the exercise of the Options within 90 days
before the Optionee’s termination of employment or service relationship, or at any time after the Optionee’s termination of employment or service relationship (the “Recapture Shares”), the Optionee agrees to pay to
the Company, within 30 days of when the Company delivers written notice to the Optionee, a Recapture Payment. The Recapture Payment may be paid in cash, Recapture Shares, or a combination of cash or Recapture Shares. If paid in cash, the Recapture
Payment shall be an amount equal to the difference between the aggregate Exercise Price paid to acquire the Recapture Shares and the Fair Market Value of the shares on the exercise date. If paid in Recapture Shares, the Recapture Payment shall be
paid by the Optionee delivering to the Company share certificates evidencing the Recapture Shares, together with a stock power, endorsed in blank. As soon as practicable after receipt of the stock certificates and stock power properly endorsed, the
Company will pay to the Optionee the lower of (A) the aggregate Exercise Price paid by the Optionee to acquire the Recapture Shares for which the stock certificates have been delivered to the Company or (B) the Fair Market Value of such
Recapture Shares. 
 Collection of the Recapture Payment shall not be a waiver of any other rights which the Company may have under this
Agreement or any other agreement entered into between the Optionee and the Company, including the right to receive money damages or enforce equitable remedies. 

(h)    Coordination With Other Agreements. To the extent that the Optionee is a party to any agreement with the
Company that contains the same or similar covenants as those set forth in this Section 4 (hereinafter referred to as the “Other Agreement”), the Optionee and the Company expressly agree that any remedy available to the
Company under this Agreement is in addition to, and does not limit the enforceability of, any remedy available to the Company under such Other Agreement. 

5.    Equitable Relief. The Optionee acknowledges and agrees that the covenants set forth in Section 4 of this
Agreement are reasonable and necessary for the protection of the Company’s valid business interests and that any breach by the Optionee of any of the provisions contained in this Agreement will cause the Company immediate, material and
irreparable injury and damage, and there is no adequate remedy at law for such breach. Accordingly, in the event of a breach of any of the covenants set forth in Section 4 of this Agreement by the Optionee, in addition to any other remedies it
may have at law or in equity, the Company shall be entitled immediately to seek 

 
enforcement of this Agreement in a court of competent jurisdiction by means of a decree of specific performance, an injunction without the posting of a bond or the requirement of any other
guarantee, and any other form of equitable relief, and the Company is entitled to recover from the Optionee the costs and attorneys’ fees it incurs to recover under this Agreement. This provision is not a waiver of any other rights which the
Company may have under this Agreement or any other agreement entered into between the Optionee and the Company, including the right to receive money damages, to terminate the Options, and/or to collect the Recapture Payment. 

6.    Market Stand-Off Agreement. You agree that following the effective
date of a registration statement of the Company filed under the Securities Act of 1933, you, for the duration specified by and to the extent requested by the Company and an underwriter of Common Stock or other securities of the Company, shall not
offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any equity securities of the Company, or any securities convertible into or exchangeable or exercisable for such securities, enter into a transaction which would
have the same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of such securities, whether any such aforementioned transaction is to be settled by delivery
of such securities or other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or disposition, or to enter into any such transaction, swap, hedge or other arrangement, in each case during the
seven days prior to and the 180 days after the effectiveness of any underwritten offering of the Company’s equity securities (or such longer or shorter period as may be requested in writing by the managing underwriter and agreed to in writing
by the Company) (the “Market Stand-Off Period”), except as part of such underwritten registration if otherwise permitted. In addition, you agree to execute any further letters,
agreements and/or other documents requested by the Company or its underwriters that are consistent with the terms of this Section 6. The Company may impose stop-transfer instructions with respect to securities subject to the foregoing
restrictions until the end of such Market Stand-Off Period. 

7.    Nontransferability of Options. These Options and, before exercise, the underlying Shares are nontransferable
otherwise than by will or the laws of descent and distribution and, during your lifetime, the Options may be exercised only by you or, during the period you are under a legal disability, by your guardian or legal representative. Except as provided
above, the Options and, before exercise, the underlying Shares may not be assigned, transferred, pledged, hypothecated, subjected to any “put equivalent position,” “call equivalent position” (as each preceding term is defined by
Rule 16(a)-1 under the Securities Exchange Act of 1934), or short position, or disposed of in any way (whether by operation of law or otherwise) and shall not be subject to execution, attachment or similar
process. 
 8.    Nonqualified Nature of the Options. The Options are not intended to qualify as incentive stock
options within the meaning of Code section 422, and this Agreement shall be so construed. You hereby acknowledge that, upon exercise of the Options, you will recognize compensation income in an amount equal to the excess of the then fair market
value of the Shares over the Exercise Price and must comply with the provisions of Section 8 of this Agreement with respect to any tax withholding obligations that arise as a result of such exercise. 

9.    Withholding of Taxes. 

(a)    At the time the Options are exercised, in whole or in part, or at any time thereafter as requested by the Company,
you hereby authorize withholding from payroll or any other payment of any kind due to you and otherwise agree to make adequate provision for foreign, federal, state and local taxes required by law to be withheld, if any, which arise in connection
with the Options. 

 The Company may require you to make a cash payment to cover any withholding tax obligation as a condition of
exercise of the Options or issuance of share certificates representing Shares. 
 (b)    The Administrator may, in its
sole discretion, permit you to satisfy, in whole or in part, any withholding tax obligation which may arise in connection with the Options either by electing to have the Company withhold from the Shares to be issued upon exercise that number of
Shares, or by electing to deliver to the Company already-owned shares, in either case having a Fair Market Value not in excess of the amount necessary to satisfy the statutory minimum withholding amount due. 

10.    Adjustments. The Administrator may make various adjustments to your Options, including adjustments to the
number and type of securities subject to the Options and the Exercise Price, in accordance with the terms of the Plan. In the event of any transaction resulting in a Change in Control (as defined in the Plan) of the Company, the outstanding Options
will terminate in accordance with the terms of Section 7(d)(iii) of the Plan. 
 11.    Purchase Right of the
Company. At any time and for any reason, the Company may purchase the Options, in whole or in part, from you. The Administrator shall provide you with written notice of the Company’s intention to exercise this purchase right, specifying the
number of Options to which the purchase right shall be applied. The purchase price per Option shall be the difference between (a) the Exercise Price per Share and (b) the Fair Market Value per Share, determined as of the date immediately
preceding the date settlement occurs. Settlement of the purchase will be made within 30 days after delivery of such written notice. In the discretion of the Administrator, payment of the purchase price will be made via cash, a promissory note, or a
combination of the two. Any such promissory note will provide for substantially equal installments, payable at least annually, over a period not to exceed five years and shall accrue interest at the applicable Federal
mid-term rate in effect under Code section 1274(d) as of the settlement date, compounded semi-annually. The Options will be automatically terminated, and of no further force and effect, as of the
settlement date with respect to the number of Options so purchased. 

12.    Non-Guarantee of Employment or Service Relationship. Nothing in the
Plan or this Agreement will alter your at-will or other employment status or other service relationship with the Company, nor be construed as a contract of employment or service relationship between you and
the Company, or as a contractual right for you to continue in the employ of, or in a service relationship with, the Company for any period of time, or as a limitation of the right of the Company to discharge you at any time with or without Cause or
notice and whether or not such discharge results in the failure of any of the Options to become exercisable or any other adverse effect on your interests under the Plan. 

13.    No Rights as a Stockholder. You shall not have any of the rights of a stockholder with respect to the Shares
until such Shares have been issued to you upon the due exercise of the Options. No adjustment will be made for dividends or distributions or other rights for which the record date is prior to the date such Shares are issued. 

14.    The Company’s Rights. The existence of the Options shall not affect in any way the right or power of
the Company or its stockholders to make or authorize any or all adjustments, recapitalizations, reorganizations or other changes in the Company’s capital structure or its business, or any merger or consolidation of the Company, or any issue of
bonds, debentures, preferred or other stocks with preference ahead of or convertible into, or otherwise affecting the Common Stock or the rights thereof, or the dissolution or liquidation of the Company, or any sale or transfer of all or any part of
the Company’s assets or business, or any other corporate act or proceeding, whether of a similar character or otherwise. 

15.    Entire Agreement. This Agreement, together with the correlating Stock Option Notice and the Plan, contain
the entire agreement between you and the Company with respect to the Options. 

 Any oral or written agreements, representations, warranties, written inducements, or other communications
made prior to the execution of this Agreement with respect to the Options shall be void and ineffective for all purposes. 

16.    Amendment. This Agreement may be amended from time to time by the Administrator in its discretion; provided,
however, that this Agreement may not be modified in a manner that would have a materially adverse effect on the Options or Shares as determined in the discretion of the Administrator, except as provided in the Plan or in a written document signed by
you and the Company. 
 17.    Conformity with Plan. This Agreement is intended to conform in all respects with,
and is subject to all applicable provisions of, the Plan. Any conflict between the terms of this Agreement and the Plan shall be resolved in accordance with the terms of the Plan. In the event of any ambiguity in this Agreement or any matters as to
which this Agreement is silent, the Plan shall govern. A copy of the Plan is provided to you with this Agreement. 

18.    Section 409A. This Agreement and the Options granted hereunder are intended to comply with, or otherwise be
exempt from, Section 409A of the Code. Nothing in the Plan or this Agreement shall be construed as including any feature for the deferral of compensation other than the deferral of recognition of income until the exercise of the Options. Should
any provision of the Plan or this Agreement be found not to comply with, or otherwise be exempt from, the provisions of Section 409A of the Code, it may be modified and given effect, in the sole discretion of the Administrator and without
requiring your consent, in such manner as the Administrator determines to be necessary or appropriate to comply with, or to effectuate an exemption from, Section 409A of the Code. The foregoing, however, shall not be construed as a guarantee by
the Company of any particular tax effect to you. 
 19.    Electronic Delivery of Documents. By your signing the
Notice, you (a) consent to the electronic delivery of this Agreement, all information with respect to the Plan and the Options, and any reports of the Company provided generally to the Company’s stockholders; (b) acknowledge that you
may receive from the Company a paper copy of any documents delivered electronically at no cost to you by contacting the Company by telephone or in writing; (c) further acknowledge that you may revoke your consent to the electronic delivery of
documents at any time by notifying the Company of such revoked consent by telephone, postal service or electronic mail; and (d) further acknowledge that you understand that you are not required to consent to electronic delivery of documents.

 20.    No Future Entitlement. By execution of the Notice, you acknowledge and agree that: (a) the grant
of these Options is a one-time benefit which does not create any contractual or other right to receive future grants of stock options, or compensation in lieu of stock options, even if stock options have been
granted repeatedly in the past; (b) all determinations with respect to any such future grants, including, but not limited to, the times when stock options shall be granted or shall become exercisable, the maximum number of shares subject to
each stock option, and the purchase price, will be at the sole discretion of the Administrator; (c) the value of these Options is an extraordinary item of compensation which is outside the scope of your employment contract, if any; (d) the
value of these Options is not part of normal or expected compensation or salary for any purpose, including, but not limited to, calculating any termination, severance, resignation, redundancy, end of service payments or similar payments, or bonuses,
long-service awards, pension or retirement benefits; (e) the vesting of these Options ceases upon termination of employment with the Company or transfer of employment from the Company, or other cessation of eligibility for any reason, except as
may otherwise be explicitly provided in this Agreement; (f) if the underlying Common Stock does not increase in value, these Options will have no value, nor does the Company guarantee any future value; and (g) no claim or entitlement to
compensation or damages arises if these Options do not increase in value and you irrevocably release the Company from any such claim that does arise. 

 21.    Personal Data. For the purpose of implementing,
administering and managing these Options, you, by execution of the Notice, consent to the collection, receipt, use, retention and transfer, in electronic or other form, of your personal data by and among the Company and its third party vendors or
any potential party to any Change in Control transaction or capital raising transaction involving the Company. You understand that personal data (including but not limited to, name, home address, telephone number, employee number, employment status,
social security number, tax identification number, date of birth, nationality, job and payroll location, data for tax withholding purposes and shares awarded, cancelled, exercised, vested and unvested) may be transferred to third parties assisting
in the implementation, administration and management of these Options and the Plan and you expressly authorize such transfer as well as the retention, use, and the subsequent transfer of the data by the recipient(s). You understand that these
recipients may be located in your country or elsewhere, and that the recipient’s country may have different data privacy laws and protections than your country. You understand that data will be held only as long as is necessary to implement,
administer and manage these Options. You understand that you may, at any time, request a list with the names and addresses of any potential recipients of the personal data, view data, request additional information about the storage and processing
of data, require any necessary amendments to data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing the Company’s Secretary. You understand, however, that refusing or withdrawing your consent may
affect your ability to accept a stock option. 
 22.    Risk and Financial Information Disclosure. For purposes
of claiming an exemption from registration under Rule 12h-1(f)(1) under the Securities Exchange Act of 1934, the Company may decide to provide you, every six months, with the information described in Rules
701(e)(3), (4), and (5) under the Securities Act of 1933 (risk and financial information relating to the Company), with any such financial statements being not more than 180 days old. Any such information may be provided either by physical or
electronic delivery or by written notice of the availability of the information on an Internet site that may be password-protected and of any password needed to access the information. You may be required to execute an agreement to keep the
information confidential as a condition precedent to the provision of the information. Any such agreement shall be executed in such manner and form as the Administrator may require from time to time. Notwithstanding the foregoing, the Company shall
have no initial or continuing obligation to provide you with the information described in this Section 22, except as otherwise required by applicable law. 

23.    Governing Law. The validity, construction, and effect of this Agreement, and of any determinations or
decisions made by the Administrator relating to this Agreement, and the rights of any and all persons having or claiming to have any interest under this Agreement, shall be determined exclusively in accordance with the laws of the State of Delaware,
without regard to its provisions concerning the applicability of laws of other jurisdictions. Any suit with respect hereto will be brought in the federal or state courts in the district which includes the city or town in which the Company’s
principal executive office is located, and you hereby agree and submit to the personal jurisdiction and venue thereof. 

24.    Headings. The headings in this Agreement are for reference purposes only and shall not affect the meaning or
interpretation of this Agreement. 
 {Glossary begins on next page} 

 GLOSSARY 

(a)    “Affiliate” has the meaning set forth in the Plan. 

(b)    “Cause” has the meaning ascribed to such term or words of similar import in your written
employment or service contract with the Company as in effect at the time at issue and, in the absence of such agreement or definition, means your (i) conviction of, or plea of nolo contendere to, a felony or crime involving moral turpitude;
(ii) fraud on or misappropriation of any funds or property of the Company, any affiliate, customer or vendor; (iii) personal dishonesty, incompetence, willful misconduct, willful violation of any law, rule or regulation (other than minor
traffic violations or similar offenses) or breach of fiduciary duty which involves personal profit; (iv) willful misconduct in connection with your duties or willful failure to perform your responsibilities in the best interests of the Company;
(v) illegal use or distribution of drugs; (vi) violation of any Company rule, regulation, procedure or policy; or (vii) breach of any provision of any employment, non-disclosure, non-competition, non-solicitation or other similar agreement executed by you for the benefit of the Company, including without limitation this Agreement, all as determined by
the Administrator, which determination will be conclusive. 
 (c)    “Change in Control” has the
meaning set forth in the Plan. 
 (d)    “Code” means the Internal Revenue Code of 1986, as
amended. 
 (e)    “Company” includes Datadog, Inc. and its Affiliates, except where the context
otherwise requires. For purposes of determining whether a Change in Control has occurred, Company shall mean only Datadog, Inc. 

(f)    “Fair Market Value” of a share of Common Stock generally means either the closing price or
the average of the high and low sale price per share of Common Stock on the relevant date, as determined in the Administrator’s discretion, as reported by the principal market or exchange upon which the Common Stock is listed or admitted for
trade. Refer to the Plan for a detailed definition of Fair Market Value, including how Fair Market Value is determined in the event that no sale of Common Stock is reported on the relevant date. 

(g)    “Service” means your employment or other service relationship with the Company and its
Affiliates. Your Service will be considered to have ceased with the Company and its Affiliates if, immediately after a sale, merger or other corporate transaction, the trade, business or entity with which you are employed or otherwise have a service
relationship is not the Company or its successor or an Affiliate of the Company or its successor. 

(h)    “Shares” mean the shares of Common Stock underlying the Options. 

(i)    “Stock Option Notice” means the written notice evidencing the award of the Options that
correlates with and makes up a part of this Agreement. 
 (j)    “Total and Permanent
Disability” means the inability 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 twelve months. The Administrator may require such proof of Total and Permanent Disability as the Administrator in its sole discretion deems appropriate and the Administrator’s good faith determination as
to whether you are totally and permanently disabled will be final and binding on all parties concerned. 

 (k)    “You”; “Your”.
“You” or “your” means the recipient of the award of Options as reflected on the Stock Option Notice. Whenever the Agreement refers to “you” under circumstances where the provision should logically be
construed, as determined by the Administrator, to apply to your estate, personal representative, or beneficiary to whom the Options may be transferred by will or by the laws of descent and distribution, the word “you” shall be deemed to
include such person. 

 EXERCISE FORM 

Administrator of Datadog, Inc. 2012 Equity Incentive Plan 
 c/o
Office of the Corporate Secretary 
 Datadog, Inc. 
  

 

	
	   

	   

 Dear Corporate Secretary: 

I hereby exercise the Options granted to me on___________________, ______, by Datadog, Inc. (the “Company”), subject
to all the terms and provisions of the applicable grant agreement and of the Datadog, Inc. 2012 Equity Incentive Plan (the “Plan”), and notify you of my desire to purchase ____________ shares of Common Stock of the Company at
a price of $______ per share pursuant to the exercise of said Options. 
 This will confirm my understanding with respect to the shares to
be issued to me by reason of this exercise of the Options (the shares to be issued pursuant hereto shall be collectively referred to hereinafter as the “Shares”) as follows: 

(a)    I am purchasing the Shares for my own account for investment only, and not with a view to, or for sale in connection
with, any distribution of the Shares in violation of the Securities Act of 1933 (the “Securities Act”), or any rule or regulation under the Securities Act. 

(b)    I understand that the Shares are being issued without registration under the Securities Act, in reliance upon one or
more exemptions contained in the Securities Act, and such reliance is based in part on the above representation. I also understand that the Company is not obligated to comply with the registration requirements of the Securities Act or with the
requirements for an exemption under Regulation A under the Securities Act for my benefit. 
 (c)    I have had such
opportunity as I deemed adequate to obtain from representatives of the Company such information as is necessary to permit me to evaluate the merits and risks of my investment in the Company. 

(d)    I have sufficient experience in business, financial and investment matters to be able to evaluate the risks involved
in the purchase of the Shares and to make an informed investment decision with respect to such purchase. 
 (e)    I can
afford a complete loss of the value of the Shares and am able to bear the economic risk of holding such Shares for an indefinite period. 

(f)    I understand that (i) the Shares have not been registered under the Securities Act and are “restricted
securities” within the meaning of Rule 144 under the Securities Act; (ii) the Shares cannot be sold, transferred or otherwise disposed of unless they are subsequently registered under the Securities Act or an exemption from
registration is then available and, therefore, they may need to be held indefinitely; and (iii) there is now no registration statement on file with the Securities and Exchange Commission with respect to any stock of the Company and the Company
has no obligation or current intention to register the Shares under the Securities Act. As a condition to any transfer of the Shares, I understand that the Company may require an opinion of counsel satisfactory to the Company to the effect that such
transfer does not require registration under the Securities Act or any state securities law. 

 (g)    I understand that the certificates for the Shares to be issued to
me will bear a legend substantially as follows: 
 The shares of stock represented by this certificate are subject to restrictions on
transfer, an option to purchase and a market stand-off agreement set forth in a certain Stock Restriction Agreement (the “Agreement”) between the corporation and the registered owner of
this certificate (or his or her predecessor in interest), and no transfer of such shares may be made without compliance with the Agreement. A copy of the Agreement is available for inspection at the office of the corporation upon appropriate request
and without charge. 
 The securities represented by this stock certificate have not been registered under the Securities Act of 1933 (the
“Act”) or applicable state securities laws (the “State Acts”), and shall not be sold, pledged, hypothecated, donated, or otherwise transferred (whether or not for consideration) by the holder except
upon the issuance to the corporation of a favorable opinion of its counsel and/or submission to the corporation of such other evidence as may be satisfactory to counsel for the corporation, to the effect that any such transfer shall not be in
violation of the Act and the State Acts. 
 The Company will issue appropriate stop transfer instructions to its transfer agent. 

(h)    I am a party to a Grant Agreement and a Stock Restriction Agreement with the Company, pursuant to which I have
agreed to certain restrictions on the transferability of the Shares and other matters relating thereto. 
 Total Amount Enclosed: $____________ 

 

									
	Date:	 	      
	 	            	 	      

		 		 		 	(Optionee)
				
		 		 		 	Received by DATADOG, INC. on
				
		 		 		 	
                          
                                      ,
         

									
					
		 		 		 	By:	 	  

 Exhibit M 

Stock Restriction Agreement (Option Exercise) 

 Exhibit A 

NOT FOR USE WITH CA RESIDENTS 

STOCK RESTRICTION AGREEMENT 

THIS STOCK RESTRICTION AGREEMENT (the “Agreement”) is made as of the _____ day of ,__________, ______, by and between
DATADOG, INC., a Delaware corporation (the “Company”), and ____________________(the “Stockholder”). Terms used but not otherwise defined herein, shall have the meanings set forth in the Plan (as defined
below). 
 For valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

 1.    Option Shares. The Stockholder was granted the right to purchase up to __________________ shares (the
“Option Shares”) of common stock of the Company, par value $0.00001 per share (the “Common Stock”), pursuant to stock options awarded under the Company’s 2012 Equity Incentive Plan (the
“Plan”) on ____________, ____ subject to the terms and conditions of the applicable option grant agreement evidencing such award (the “Grant Agreement”). The Stockholder has purchased on even date
herewith,    Option Shares (the “Shares”). The Stockholder agrees that the Shares shall be subject to the terms, conditions and restrictions set forth in this Agreement and the Grant Agreement. The
Stockholder further agrees that any additional Option Shares purchased by the Stockholder shall be subject to the terms, conditions and restrictions set forth in this Agreement, and such shares shall be deemed Shares for all purposes hereunder. Upon
receipt of payment by the Company for the Shares, the Company shall either issue and deliver to the Stockholder one or more certificates in the name of the Stockholder for that number of Shares purchased by the Stockholder, hold such Share
certificates in escrow until the underlying Shares may be transferred freely without restriction under this Agreement, or provide for uncertificated, book entry issuance of those Shares. 

2.    Restrictions on Transfer. 

(a)    Transfers Prohibited. At any time prior to the date of the closing of the first public offering of
securities of the Company that is effected pursuant to a registration statement filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act of 1933 (the “Securities Act”) or the
exchange of the Shares for shares of an entity that are so registered, the Stockholder may not sell or otherwise transfer or assign for cash, cash equivalents or any other form of consideration, including a promissory note, all or any part of his or
her Shares, except that the Shares may be transferred to the Company in pledge as security for any purchase-money indebtedness incurred by the Stockholder in connection with the acquisition of the Shares. Any attempted transfer of any Shares in
violation of the provisions of this Agreement shall be null and void. 
 (b)    Exempt Family Transactions.
Notwithstanding the provisions of Section 2(a), the Stockholder may transfer any or all of the Stockholder’s Shares, either during the Stockholder’s lifetime or on death by will or the laws of descent and distribution, to one or more
members of the Stockholder’s immediate family, to a trust for the exclusive benefit of the Stockholder or such immediate family members, to any other entity owned exclusively by the Stockholder or such immediate family members, or to any
combination of the foregoing (each, a “Permitted Transferee”); provided, however, that the Stockholder may not make any transfers pursuant to any divorce or separation proceedings or settlements. “Immediate family
member” shall mean spouse, children, grandchildren, parents or siblings of the Stockholder, including in each case in-laws and adoptive relations. 

 (c)    Registration Statement Transfer. The Stockholder may
transfer the Shares pursuant to a registration statement filed by the Company with the Securities and Exchange Commission with respect to the Shares. 

(d)    Conditions to Transfer. Notwithstanding anything to the contrary contained elsewhere in this
Section 2, except with respect to a transfer pursuant to Section 2(c), any Permitted Transferee of the Stockholder shall receive and hold such stock subject to the provisions of this Agreement, and, as a condition of such transfer, shall
deliver to the Company a written instrument confirming that such transferee shall be bound by all of the terms and conditions of this Agreement. There shall be no subsequent transfer of such stock except in accordance with this Section 2. 

(e)    Termination of Restrictions on Transfer. The foregoing restrictions on transfer in this Section 2
shall terminate upon the closing of the first public offering of securities of the Company that is effected pursuant to a registration statement filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act
of 1933 that results in aggregate gross proceeds to the Company of at least $25 million with a pre-money valuation of at least $50 million or the exchange of the Shares for shares of an entity that
are so registered. 
 3.    Effect of Prohibited Transfer. The Company shall not be required to (a) transfer
on its books any of the Shares that have been sold or transferred in violation of any of the provisions set forth in this Agreement, or (b) treat as owner of such Shares or to pay dividends or other distributions to any transferee to whom any
such Shares shall have been so sold or transferred. 
 4.    Company’s Repurchase Right. 

(a)    Repurchase Right. Upon the termination of the Stockholder’s employment or service relationship with
the Company for any reason, the Company will have a discretionary call right (the “Repurchase Right”), exercisable during the 180-day period following the date of such cessation, to
purchase any or all of the Shares from the Stockholder or the Stockholder’s personal representative, estate, heirs, legatees, or Permitted Transferees, as the case may be, and such persons shall have the obligation to sell such Shares upon
written request; provided, however, that if Stockholder’s cessation of service occurs within 180 days after the Shares were issued, then, in lieu of the foregoing period, the Repurchase Right shall be exercisable by the Company during the 180-day period that commences on the 181st day after such issue date. 

(b)    Implementation of Repurchase Right. The Repurchase Right shall be exercised by giving written notice to the
Stockholder or the Stockholder’s personal representative, estate, heirs, legatees, or Permitted Transferees, as the case may be, within the applicable period described in the preceding sentence, of the Company’s intention to purchase
Shares and stating the number of Shares to be purchased. The completion of the purchase shall take place at the principal office of the Company or such other location specified by the Company, no later than the fifteenth business day after the
delivery of such notice. The per-share purchase price for Shares purchased pursuant to this Section 4 shall be equal to the Fair Market Value on the purchase date. The Fair Market Value of Shares shall be
determined in good faith by the Administrator of the Company in accordance with the terms of the Plan. In making such determination, the Administrator may take into account any valuation factors it deems appropriate or advisable in its sole
discretion, including, without limitation, profitability, financial position, asset value or other factor relating to the value of the Company, as well as discounts to account for minority interests and lack of marketability. In the discretion of
the Company, payment of the purchase price will be made via delivery of cash, check, wire transfer, cancellation of indebtedness, a promissory note, or a combination of such methods, against delivery of certificates or other instruments representing
the Shares so purchased, appropriately endorsed or executed by the holder. Any such promissory note will provide for substantially equal installments, payable at least annually, over a period not to exceed five years and will accrue interest at the
applicable federal rate in effect under Section 1274(d) of the Internal Revenue Code of 1986, as amended, as of the settlement date, compounded annually. 

 (c)    Limitation on and Expiration of Repurchase Right.
Notwithstanding the foregoing, the Repurchase Right of the Company described in this Section 4 shall terminate upon the closing of the first public offering of securities of the Company that is effected pursuant to a registration statement
filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act or the exchange of the Shares for shares of an entity that are so registered. 

5.    Drag-Along Right. Notwithstanding anything contained herein to the contrary, if at any time any stockholder
of the Company, or group of stockholders, owning a majority or more of the voting capital stock of the Company (hereinafter, collectively the “Transferring Stockholders”) proposes to enter into any transaction involving
(a) a sale of more than 50% of the outstanding voting capital stock of the Company in a non-public sale or (b) any merger, share exchange, consolidation or other reorganization or business
combination of the Company immediately after which a majority of the directors of the surviving entity is not comprised of persons who were directors of the Company immediately prior to such transaction or after which persons who hold a majority of
the voting capital stock of the surviving entity are not persons who held voting capital stock of the Company immediately prior to such transaction (a
“Change-in-Control Transaction”) the Company may require the Stockholder to participate in such Change-in-Control Transaction with respect to all or such number of the Stockholder’s Shares as the Company may specify in its discretion, by giving the Stockholder written notice thereof at least ten
days in advance of the date of the transaction or the date that tender is required, as the case may be. Upon receipt of such notice, the Stockholder shall tender the specified number of Shares, at the same price and upon the same terms and
conditions applicable to the Transferring Stockholders in the transaction or, in the discretion of the acquirer or successor to the Company, upon payment of the purchase price to the Stockholder in immediately available funds. In addition, if at any
time the Company and/or any Transferring Stockholders propose to enter into any such Change in Control transaction, the Company may require the Stockholder to vote in favor of such transaction, where approval of the stockholders is required by law
or otherwise sought, by giving the Stockholder notice thereof within the time prescribed by law and the Company’s Certificate of Incorporation and Bylaws for giving notice of a meeting of stockholders called for the purpose of approving such
transaction. If the Company requires such vote, the Stockholder agrees that he or she will, if requested, deliver his or her proxy to the person designated by the Company to vote his or her Shares in favor of such Change-in-Control Transaction. 
 6.    Company’s Right to Defer
Payments. Notwithstanding anything herein to the contrary, no payment shall be made under this Agreement, or under any promissory note issued by the Company pursuant to this Agreement, that would cause the Company to violate any law, or any
rights or preference of preferred stockholders of the Company, any banking agreement or loan or other financial covenant or cause default of any senior indebtedness of the Company, regardless of when such agreement, covenant or indebtedness was
created, incurred or assumed. Any payment under this Agreement that would cause such violation or default shall be deferred until, in the sole discretion of the Board of Directors of the Company, such payment shall no longer cause any such violation
or default. Any payment deferred in consequence of the provisions of the preceding sentence shall bear simple interest from the date such payment would otherwise have been made to the date when such payment is actually made, at a rate which is equal
to the prime rate of interest published in the Wall Street Journal on the date such payment would otherwise have been made, but in no event shall such rate of interest exceed 10% per annum. The Company shall pay interest at the same time as it makes
the payment to which such interest relates. 
 7.    Restrictive Legend. All certificates representing Shares
shall have affixed thereto a legend in substantially the following form, in addition to any other legends that may be required under federal or state securities laws: 

The shares of stock represented by this certificate are subject to restrictions on transfer, an option to purchase and a market stand-off agreement set forth in a certain Stock Restriction Agreement (the “Agreement”) between the corporation and the registered owner of this certificate (or his or her predecessor in
interest), and no transfer of such shares may be made without compliance with the Agreement. A copy of the Agreement is available for inspection at the office of the corporation upon appropriate request without charge. 

 The securities represented by this stock certificate have not been registered under the
Securities Act of 1933 (the “Act”) or applicable state securities laws (the “State Acts”), and shall not be sold, pledged, hypothecated, donated, or otherwise transferred (whether or not for
consideration) by the holder except upon the issuance to the corporation of a favorable opinion of its counsel and/or submission to the corporation of such other evidence as may be satisfactory to counsel for the corporation, to the effect that any
such transfer shall not be in violation of the Act and the State Acts. 
 8.    Investment Representations. The
Stockholder represents, warrants and covenants as follows: 
 (a)    Stockholder is purchasing the Shares for the
Stockholder’s own account for investment only, and not with a view to, or for sale in connection with, any distribution of the Shares in violation of the Securities Act, or any rule or regulation under the Securities Act. 

(b)    Stockholder understands that the Shares are being issued without registration under the Securities Act, in reliance
upon one or more exemptions contained in the Securities Act, and such reliance is based in part on the above representation. The Stockholder also understands that the Company is not obligated to comply with the registration requirements of the
Securities Act or with the requirements for an exemption under Regulation A under the Securities Act for the Stockholder’s benefit. 

(c)    Stockholder has had such opportunity as the Stockholder deemed adequate to obtain from representatives of the
Company such information as is necessary to permit the Stockholder to evaluate the merits and risks of the Stockholder’s investment in the Company. 

(d)    Stockholder has sufficient experience in business, financial and investment matters to be able to evaluate the
risks involved in the purchase of the Shares and to make an informed investment decision with respect to such purchase. 

(e)    Stockholder can afford a complete loss of the value of the Shares and is able to bear the economic risk of holding
such Shares for an indefinite period. 
 (f)    Stockholder understands that (i) the Shares have not been
registered under the Securities Act and are “restricted securities” within the meaning of Rule 144 under the Securities Act; (ii) the Shares cannot be sold, transferred or otherwise disposed of unless they are subsequently
registered under the Securities Act or an exemption from registration is then available and, therefore, they may need to be held indefinitely; and (iii) there is now no registration statement on file with the Securities and Exchange Commission
with respect to any stock of the Company and the Company has no obligation or current intention to register the Shares under the Securities Act. As a condition to any transfer of the Shares, the Stockholder understands that the Company may require
an opinion of counsel satisfactory to the Company to the effect that such transfer does not require registration under the Securities Act or any state securities law. 

9.    Adjustments for Stock Splits, Stock Dividends, etc. 

(a)    If from time to time there is any spin-off, stock split-up, stock dividend, stock distribution or other reclassification of the Common Stock of the Company, any and all new, substituted or additional securities to which the Stockholder is entitled by reason of his
or her ownership of the Shares shall be immediately subject to the restrictions on transfer and other provisions of this Agreement in the same manner and to the same extent as the Shares. 

 (b)    If the Shares are converted into or exchanged for, or
stockholders of the Company receive by reason of any distribution in total or partial liquidation, securities of another corporation, or other property (including cash), pursuant to any merger of the Company or acquisition of its assets, then the
rights of the Company under this Agreement shall inure to the benefit of the Company’s successor, and this Agreement shall apply to the securities or other property received upon such conversion, exchange or distribution in the same manner and
to the same extent as the Shares. 
 10.    Market Stand-Off. Following
the effective date of a registration statement of the Company filed under the Securities Act, the Stockholder, for the duration specified by and to the extent requested by the Company and an underwriter of Common Stock or other securities of the
Company, shall not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any equity securities of the Company, or any securities convertible into or exchangeable or exercisable for such securities, enter into a
transaction which would have the same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of such securities, whether any such aforementioned transaction is to
be settled by delivery of such securities or other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or disposition, or to enter into any such transaction, swap, hedge or other arrangement, in
each case during the seven days prior to and the 180 days after the effectiveness of any underwritten offering of the Company’s equity securities (or such longer or shorter period as may be requested in writing by the managing underwriter
and agreed to in writing by the Company) (the “Market Stand-Off Period”), except as part of such underwritten registration if otherwise permitted. In addition, the Stockholder agrees to
execute any further letters, agreements and/or other documents requested by the Company or its underwriters which are consistent with the terms of this Section 10. The Company may impose stop-transfer instructions with respect to securities
subject to the foregoing restrictions until the end of such Market Stand-Off Period. 

11.    Withholding Taxes. The Stockholder acknowledges and agrees that the Company has the right to deduct from
payments of any kind otherwise due to the Stockholder any federal, state or local taxes of any kind required by law to be withheld with respect to the purchase, sale or vesting of the Shares by the Stockholder. 

12.    Invalidity or Unenforceability. It is the intention of the Company and the Stockholder that this Agreement
shall be enforceable to the fullest extent allowed by law. In the event that a court having jurisdiction holds any provision of this Agreement to be invalid or unenforceable, in whole or in part, the Company and the Stockholder agree that, if
allowed by law, that provision shall be reduced to the degree necessary to render it valid and enforceable without affecting the rest of this Agreement. 

13.    Waiver. No delay or omission by the Company in exercising any right under this Agreement shall operate as a
waiver of that or any other right. A waiver or consent given by the Company on any one occasion shall be effective only in that instance and shall not be construed as a bar or waiver of any right on any other occasion. 

14.    Binding Effect. This Agreement shall be binding upon and inure to the benefit of the Company and the
Stockholder and their respective heirs, executors, administrators, legal representatives, successors and assigns, subject to the terms, conditions and restrictions set forth in this Agreement. The Company may assign its rights under this Agreement
to a third party, provided that such assignee agrees to be bound by all of the Company’s obligations under this Agreement. 

15.    No Rights To Employment. Nothing contained in this Agreement, the Plan, or the Grant Agreement shall confer
any right on an individual to continue in the service of the Company or shall interfere in any way with the right of the Company to terminate such service at any time with or without cause or notice and whether or not such termination results in
(a) the failure of any Award to vest; (b) the forfeiture of any unvested or vested portion of any Award; and/or (c) any other adverse effect on the individual’s interest under this Agreement, the Plan, or the Grant Agreement.

 16.    Notices. All notices and other communications made or
given pursuant to this Agreement shall be in writing and shall be sufficiently made or given if hand delivered or mailed by certified mail, addressed to the Stockholder at the address contained in the records of the Company, or addressed to the
Company for the attention of its Corporate Secretary at its principal executive office or, if the receiving party consents in advance, transmitted and received via telecopy or via such other electronic transmission mechanism as may be available to
the parties. 
 17.    Pronouns. Whenever the context may require, any pronouns used in this Agreement shall
include the corresponding masculine, feminine or neuter forms, and the singular form of nouns and pronouns shall include the plural, and vice versa. 

18.    Stockholder. Whenever the word “Stockholder” is used in any provision of this Agreement
under circumstances where the provision should logically be construed, as determined by the Administrator, to apply to the Stockholder’s estate, personal representative, beneficiary to whom the Shares may be transferred by will or by the laws
of descent and distribution, transferees, successors or assignees, the word “Stockholder” shall be deemed to include such persons. 

19.    Entire Agreement. This Agreement constitutes the entire agreement between the parties, and supersedes all
prior agreements and understandings, relating to the subject matter of this Agreement. 
 20.    Amendment. This
Agreement may be amended or modified only by a written instrument executed by both the Company and the Stockholder. 

21.    Governing Law. This Agreement shall be construed, interpreted and enforced in accordance with the laws of
the State of Delaware, without regard to its provisions concerning the applicability of laws of other jurisdictions. Any suit with respect hereto will be brought in the federal or state courts in the districts which include the principal executive
offices of the Company, and the Stockholder hereby agrees and submits to the personal jurisdiction and venue thereof. 

 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year
first above written. 
  

			
	DATADOG, INC.

 
			
		
	By:	 	 

 
			
		
	Name:	 	 
		 	 Print

 
			
		
	Title:	 	 

 
			
	
	STOCKHOLDER
		
		 	Signature
		
	Name:	 	 

 
			
		
	Address:	 	 
		 	 
		 	 

 If the Stockholder resides in a community property state, including Arizona, California, Idaho,
Louisiana, Nevada, New Mexico, Texas, Washington, or Wisconsin, the Stockholder’s spouse must execute the following Consent of Community Property Spouse 

Consent of Community Property Spouse 

The undersigned spouse of the Stockholder has read, understands, and hereby approves the purchase of shares of Common Stock pursuant to this
Stock Restriction Agreement and the related Grant Agreement between the Stockholder and the Company (the “Agreements”). In consideration of the Company’s granting my spouse the right to purchase the Shares as set forth
in the Agreements, the undersigned hereby agrees to be irrevocably bound by the Agreements and further agrees that any community property interest shall similarly be bound by the Agreements. The undersigned hereby appoints the Stockholder as my attorney-in-fact with respect to any amendment or exercise of any rights under the Agreements. 
  

									
					
	Date:	 	 	 		 		 	 
		 		 		 		 	Signature of Stockholder’s Spouse
					
		 		 		 	Address	 	 
					
		 		 		 		 	 
					
		 		 		 		 	 

 Exhibit N 

Restricted Stock Award Documents 

 NOT FOR USE WITH CA RESIDENTS 

DATADOG, INC. 

RESTRICTED STOCK AWARD NOTICE 

This Restricted Stock Award Notice (this “Notice”) evidences the award of shares of common stock, par value $0.00001
per share (“Common Stock”), of Datadog, Inc., a Delaware corporation (the “Company”), that have been granted to you, [NAME], subject to and conditioned upon your agreement to the terms of the attached Restricted Stock Award Agreement (the “Award Agreement”). The number of shares granted to you is specified
below. This Notice constitutes part of and is subject to the terms and provisions of the Award Agreement and the Datadog, Inc. 2012 Equity Incentive Plan (the “Plan”), which are incorporated by reference herein. You
must return an executed copy of this Notice to the Company within 30 days of the date hereof. If you fail to do so, the grant of Shares may be rendered null and void in the Company’s discretion. 

Grant Date: [GRANT DATE]

 Vesting Base Date: [VESTING BASE DATE] 
 Number of Options: [NUMBER] shares of Common Stock (the “Shares”) 
 Fair Market Value: [VALUE] per Share, as determined by the Administrator 

Vesting Schedule: Subject to the terms and conditions described in the Award Agreement, the Shares vest in accordance with the schedule below: 

 

	 	(a)	 [_____]of the Shares vest on the first anniversary of the Vesting
Base Date (the “Initial Vesting Date”), and 

  

	 	(b)	 [_____]% of the Shares vest on the date [______] after the Initial Vesting Date and on such date every [______] thereafter, through the [______] anniversary
of the Vesting Base Date. 

 The extent to which the Shares are vested as of a particular date is rounded down to the nearest whole share.
However, vesting is rounded up to 100% on the [______] anniversary of the Vesting Base Date. 

IF YOUR SERVICE WITH THE COMPANY CEASES FOR ANY REASON PRIOR TO THE DATE THAT ALL OF THE SHARES ARE VESTED, YOU WILL AUTOMATICALLY FORFEIT TO
THE COMPANY FOR NO CONSIDERATION ALL SHARES THAT ARE UNVESTED AS OF SUCH TIME. Other than as provided in the Award Agreement, you shall have all rights of ownership with respect to the Shares, including the right to vote and to receive dividends
(including stock dividends and cash dividends). 
  

			
	 DATADOG, INC.

		
	By:	 	 
		 	 Name:

		 	 Title:

 I acknowledge that I have carefully read the attached Agreement and the Plan and agree to be bound by all of the
provisions set forth in these documents. 
  

									
	Enclosures:	 	 Restricted Stock Award Agreement
 Ex. A
– Assignment Separate from Certificate
 Ex. B - Joint Escrow Instructions

Ex. C - Consent of Spouse
 Datadog, Inc. 2012 Equity
Incentive Plan
	 		 	 AWARDEE

		 		 		 	      

		 		 		 	Date:	 	      

 RESTRICTED STOCK AWARD
AGREEMENT 
 UNDER THE 

DATADOG, INC. 2012 EQUITY INCENTIVE PLAN 

1.    Terminology. Capitalized terms used in this Agreement are defined in the correlating Restricted Stock Award
Notice (the “Notice”) and/or the Glossary at the end of this Agreement. 
 2.    Award Terms,
Vesting and Escrow. 
 (a)    Grant of Shares. Awardee was granted the Shares on the Grant Date specified in
the Notice, subject to the terms and conditions of the Notice (which is incorporated herein by reference) and pursuant to this Agreement. Awardee hereby accepts the Shares as described in the Notice and agrees that the Shares shall be subject to the
terms, conditions and restrictions set forth in this Agreement and the Plan. 
 (b)    Vesting of Shares. The
Shares will vest in accordance with the vesting schedule identified in the Notice (the “Vesting Schedule”) so long as your Service continues through each applicable date upon which vesting is scheduled to occur. As of each
such date, any of the Shares that have then vested are referred to in this Agreement as “Vested Shares,” and any Shares that have not yet then vested are referred to as “Unvested Shares.” 

(c)    Escrow of Shares. 

(i)    To ensure the availability for delivery of Awardee’s Unvested Shares upon forfeiture pursuant to
Section 3 below, Awardee shall, upon execution of this Agreement, deliver and deposit with an escrow holder designated by the Company (the “Escrow Holder”) the share certificates representing the Unvested Shares,
together with the stock assignment duly endorsed in blank, attached hereto as Exhibit A. The Unvested Shares and stock assignment shall be held by the Escrow Holder, pursuant to the Joint Escrow Instructions of the Company and Awardee attached
hereto as Exhibit B, until such time as the Shares vest. As a further condition to the Company’s obligations under this Agreement, the Company may require the spouse of Awardee to execute and deliver to the Company the Consent of Spouse
attached hereto as Exhibit C. The Escrow Holder shall not be liable for any act it may do or omit to do with respect to holding the Unvested Shares in escrow while acting in good faith and in the exercise of its judgment. 

(ii)    If the Unvested Shares are forfeited, the Escrow Holder, upon receipt of written notice of such exercise from the
proposed transferee, shall take all steps necessary to accomplish such transfer. 
 (iii)    When any Share vests, upon
request, the Escrow Holder shall promptly cause a new certificate to be issued for the vested Share and shall deliver the certificate to the Company or Awardee, as the case may be. 

3.    Termination of Service. 

(a)    Forfeiture of Unvested Shares. If your Service with the Company ceases for any reason prior to the date that
all of the Shares are vested, Awardee shall automatically forfeit to the Company for no consideration all Unvested Shares as of such time. 

(b)    Change in Status. In the event that your Service is with a business, trade or entity that, after the Grant
Date, ceases for any reason to be part or an Affiliate of the Company, your Service will be deemed to have terminated for purposes of this Section 3 upon such cessation if your Service does not continue uninterrupted immediately thereafter with
the Company or an Affiliate of the Company. 

 4.    Awardee Covenants. In consideration of the Shares granted
to Awardee pursuant to this Agreement and the service relationship (continuing or otherwise) of Awardee with the Company, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and in recognition of
the Company’s legitimate purpose of protecting its confidential information, assets and goodwill by avoiding unauthorized disclosure of the Company’s confidential information at any time, Awardee agrees and covenants as follows: 

(a)    Definitions. 

(i)    As used herein “Customers” means all past, current and prospective persons, firms or
entities that have either sought or received products, goods or services from the Company, have contacted the Company for the purpose of seeking products, goods or services or have been contacted by the Company for the purpose of providing products,
goods or services during his employment or other service relationship, and all persons, firms, or entities subject to the control of those persons, firms, or entities. The Customers covered by this Agreement shall include, but not be limited to, any
Customer or potential Customer of the Company at any time during Awardee’s employment or other service relationship with the Company, whether or not Awardee had any personal contact or relationship with such individuals or entities. 

(ii)    As used herein, “Confidential Information” means all information, whether or not in
writing, of a private, secret or confidential nature, concerning the Company, including without limitation, its business, business relationships, financial affairs, technology and inventions, including without limitation, information about the
Company’s methods of operation, manufacturing, selling, marketing, promoting or otherwise providing products, goods or services, financial data, personnel data, the existence and identity of existing or potential Customers, suppliers, officers,
directors, agents, vendors, owners, shareholders, contractors, partners, representatives, advisors, and consultants of the Company or any contractual relationships or arrangements with third parties. 

(b)    Nondisclosure of Confidential Information. Awardee recognizes, acknowledges and agrees that: 

(i)    Confidential Information was developed by the Company at considerable expense, that this information is a valuable
Company asset and part of its goodwill, that this information is vital to the Company’s success and is the sole property of the Company; 

(ii)    during Awardee’s employment or other service relationship with the Company, Awardee will have access to, come
into possession of, work with and become familiar with the Company’s Confidential Information; that Awardee may be called upon to establish close relationships with the Company’s Customers, suppliers, and employees of the Company; and that
the success of the Company’s business depends in large part on Awardee’s personal conduct in contacting and establishing relationships with Customers, suppliers and employees of the Company; 

(iii)    the value to Awardee of the enhancement of Awardee’s professional experience and credentials by virtue of
Awardee’s employment or other service relationship with the Company; 
 (iv)    during Awardee’s employment or
other service relationship and following the termination thereof, whether voluntary or involuntary, whether with or without cause, and whether with or without notice, Awardee will not, on Awardee’s own behalf or as a partner, officer, director,
employee, agent, advisor or consultant of any other person or entity, directly or indirectly, disclose the Company’s Confidential Information to any person or entity other than agents of the Company, and Awardee will not use or aid others in
obtaining or using any such Confidential Information without the express written permission of the Chief Executive Officer of the Company; 

(v)    use or disclosure of such Confidential Information, other than as specifically permitted under this Agreement,
might reasonably be construed to be contrary to the interests of the Company and Awardee will not use or disclose to others any such Confidential Information of the Company except for the benefit of the Company in connection with the performance of
Awardee’s employment or other service relationship with the Company; 

 (vi)    Awardee will immediately inform the Company of any unauthorized
disclosures of Confidential Information that come to Awardee’s attention; 
 (vii)    the obligations under this
Section 4 with respect to the Confidential Information will survive the termination of his employment or service relationship with the Company unless and until such Confidential Information becomes public knowledge and becomes matter in the
public domain through no act or omission by Awardee; 
 (viii)    all files, letters, memoranda, reports, records, data,
sketches, drawings, laboratory notebooks, program listings, display screen printouts or other written, photographic, or other tangible material containing Confidential Information, whether created by Awardee or others, which shall come into
Awardee’s custody or possession, shall be and are the exclusive property of the Company; and Awardee will deliver to the Company all such materials and copies thereof and all tangible property of the Company in Awardee’s custody or
possession upon the earlier of (a) a request by the Company or (b) termination of Awardee’s service relationship with the Company, whether voluntary or involuntary, whether with or without cause, and whether with or without notice;
and 
 (ix)    the obligations under this Section with respect to the Confidential Information also extend to such
similar types of information, materials and tangible property of the Customers of and suppliers to the Company, as well as other third parties who may have disclosed or entrusted the same to Awardee or the Company. 

(c)    Nonsolicitation. During the period of Awardee’s employment or other service relationship with the
Company, and for a period of twelve (12) months after the termination or expiration thereof for any reason, whether voluntary or involuntary, whether with or without cause, whether with or without notice and without limiting the applicability
of any other provisions of this Agreement that are intended to operate after such termination or expiration, Awardee recognizes, acknowledges and agrees that Awardee will not, directly or indirectly (other than as the holder of not more than 1% of
the total outstanding stock of a publicly held company), either on Awardee’s own behalf or as an owner, shareholder, partner, member, participant, officer, director, employee, agent, representative, advisor or consultant of any other
individual, entity or enterprise, do or attempt to do any of the following: 
 (i)    solicit, encourage or induce any
current or prospective Customers, suppliers, vendors or contractors of the Company to terminate or adversely modify any business relationship with the Company or not to proceed with, enter into, renew or continue any business relationship with the
Company, or otherwise interfere with any business relationship between the Company and any such person; or 

(ii)    solicit, encourage or induce any current or prospective Customers to purchase, or otherwise contract for, any
products, goods or services the same as or similar to any of the products, goods or services sold, provided, promoted, marketed or offered by the Company; or 

(iii)    solicit, encourage or induce any officer, director, employee, agent, partner, consultant or independent
contractor of the Company to terminate an employment or relationship with the Company, supervise, employ or engage any such person, or otherwise interfere with or disrupt the Company’s relationship with any such person; or 

(iv)    engage in any act involving dishonesty, bad faith or lack of integrity or candor with respect to the Company,
including, without limitation, disparaging the Company or any of its directors, officers, consultants, employees or stockholders. 

 (d)    Assignment. Awardee will promptly disclose and describe to
the Company all Inventions (as defined below) made, conceived, developed or reduced to practice, whether jointly or with others, within the scope of Awardee’s employment or other service relationship with the Company (hereafter,
“Company Inventions”). Awardee hereby assigns and will assign to Company or Company’s designee all of Awardee’s right, title and interest in and to any and all Company Inventions. For purposes of this Agreement,
“Inventions” means all discoveries, designs, developments, improvements, inventions (whether or not protectable under patent laws), works of authorship, information fixed in any tangible medium of expression (whether or not
protectable under copyright laws), trade secrets, know-how, ideas (whether or not protectable under trade secret laws), mask works, trademarks, service marks, trade names and trade dress. 

(e)    Enforceability. If any restriction set forth in this Section 4 is found by any court of competent
jurisdiction to be unenforceable because it extends for too long a period of time or over too great a range of activities or in too broad a geographic area, it will be interpreted to extend only over the maximum period of time, range of activities
and/or geographic area as to which it may be enforceable. 
 (f)    Acknowledgement as to Reasonableness. Awardee
recognizes, acknowledges and agrees that if his employment or other service relationship with the Company terminates for any valid or other reason, Awardee can earn a livelihood without violating any of the restrictions contained in this
Section 4. Awardee also recognizes, acknowledges and agrees that the Company’s business, with and through any person or entity which directly or indirectly controls, is controlled by, or is under common control with the Company, including
any parent of the Company or subsidiary of the Company, is national in scope and that the time period and scope of the foregoing restrictions are reasonable and necessary for the protection of the Company’s valid business interests. 

(g)    Termination of Shares/Recapture Payment. Awardee further recognizes and acknowledges that it would be
difficult to ascertain the damages arising from a violation of the covenants set forth in this Section 4. Accordingly, notwithstanding anything herein to the contrary, if the Administrator or its delegate, in its sole discretion, determines
that Awardee has engaged in any activity that contravenes the covenants set forth in this Section 4, Awardee agrees that, with respect to any Shares that have become Vested Shares within 180 days before the termination of your Service (the
“Recapture Shares”), Awardee agrees to pay to the Company, within 30 days of when the Company delivers written notice to Awardee, a “Recapture Payment.” The Recapture Payment may be paid in cash,
Recapture Shares, or a combination of cash or Recapture Shares. If paid in cash, the Recapture Payment shall be an amount equal to the Fair Market Value of the shares as of the effective date of the termination of your Service (or, if higher, the
Fair Market Value of the shares as of the date you violated one or more of the covenants set forth in this Section 4). If paid in Recapture Shares, the Recapture Payment shall be paid by Awardee by delivering to the Company share certificates
evidencing the Recapture Shares, together with a stock power, endorsed in blank. As soon as practicable after receipt of the stock certificates and stock power properly endorsed, the Company will pay to Awardee an amount equal to the Fair Market
Value of the shares as of the effective date of the termination of your Service (or, if lower, the Fair Market Value of the shares as of the date you violated one or more of the covenants set forth in this Section 4). Collection of the
Recapture Payment shall not be a waiver of any other rights which the Company may have under this Agreement or any other agreement entered into between Awardee and the Company, including the right to receive money damages or enforce equitable
remedies. 
 (h)    Coordination With Other Agreements. To the extent that Awardee is a party to any agreement
with the Company that contains the same or similar covenants as those set forth in this Section 4 (hereinafter referred to as the “Other Agreement”), Awardee and the Company expressly agree that any remedy available to
the Company under this Agreement is in addition to, and does not limit the enforceability of, any remedy available to the Company under such Other Agreement. 

5.    Equitable Relief. Awardee acknowledges and agrees that the covenants set forth in Section 4 of this
Agreement are reasonable and necessary for the protection of the Company’s valid business interests and that any breach by Awardee of any of the provisions contained in this Agreement will cause the Company immediate, material and irreparable
injury and damage, and there is no adequate remedy at law for such breach. Accordingly, in the event of a breach of any of the covenants set forth in Section 4 of this Agreement by Awardee, in addition to

 
any other remedies it may have at law or in equity, the Company shall be entitled immediately to seek enforcement of this Agreement in a court of competent jurisdiction by means of a decree of
specific performance, an injunction without the posting of a bond or the requirement of any other guarantee, and any other form of equitable relief, and the Company is entitled to recover from Awardee the costs and attorneys’ fees it incurs to
recover under this Agreement. This provision is not a waiver of any other rights which the Company may have under this Agreement or any other agreement entered into between Awardee and the Company, including the right to receive money damages, to
terminate the Shares, and/or to collect the Recapture Payment. 
 6.    Restrictions on Transfer. 

(a)    Transfers Prohibited. At any time prior to the date of the closing of the first public offering of
securities of the Company that is effected pursuant to a registration statement filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act of 1933 (the “Securities Act”) or the
exchange of the Shares for shares of an entity that are so registered, Awardee may not sell or otherwise transfer or assign for cash, cash equivalents or any other form of consideration, including a promissory note, all or any part of his or her
Shares. Any attempted transfer of any Shares in violation of the provisions of this Agreement shall be null and void. 

(b)    Exempt Family Transactions. Notwithstanding the provisions of Section 6(a), Awardee may transfer any or
all of Awardee’s Shares, either during Awardee’s lifetime or on death by will or the laws of descent and distribution, to one or more members of Awardee’s immediate family, to a trust for the exclusive benefit of Awardee or such
immediate family members, to any other entity owned exclusively by Awardee or such immediate family members, or to any combination of the foregoing (each, a “Permitted Transferee”); provided, however, that Awardee may not
make any transfers pursuant to any divorce or separation proceedings or settlements. “Immediate family member” shall mean spouse, children, grandchildren, parents or siblings of Awardee, including in each case in-laws and adoptive relations. 
 (c)    Registration Statement Transfer.
Awardee may transfer the Shares pursuant to a registration statement filed by the Company with the Securities and Exchange Commission with respect to the Shares. 

(d)    Conditions to Transfer. Notwithstanding anything to the contrary contained elsewhere in this Section 6,
except with respect to a transfer pursuant to Section 6(c), any Permitted Transferee of Awardee shall receive and hold such stock subject to the provisions of this Agreement, and, as a condition of such transfer, shall deliver to the Company a
written instrument confirming that such transferee shall be bound by all of the terms and conditions of this Agreement. There shall be no subsequent transfer of such stock except in accordance with this Section 6. 

(e)    Termination of Restrictions on Transfer. The foregoing restrictions on transfer in this Section 6 shall
terminate upon the closing of the first public offering of securities of the Company that is effected pursuant to a registration statement filed with, and declared effective by, the Securities and Exchange Commission under the Securities Act of 1933
that results in aggregate gross proceeds to the Company of at least $25 million with a pre-money valuation of at least $50 million or the exchange of the Shares for shares of an entity that are so
registered. 
 7.    Effect of Prohibited Transfer. The Company shall not be required to (a) transfer on its
books any of the Shares that have been sold or transferred in violation of any of the provisions set forth in this Agreement, or (b) treat as owner of such Shares or to pay dividends or other distributions to any transferee to whom any such
Shares shall have been so sold or transferred. 
 8.    Company’s Repurchase Right. 

(a)    Repurchase Right. Upon the termination of Awardee’s employment or service relationship with the Company
for any reason, the Company will have a discretionary call right (the “Repurchase  

 
Right”), exercisable during the 180 day period following the date of such cessation, to purchase any or all of the Shares from Awardee or Awardee’s personal
representative, estate, heirs, legatees, or Permitted Transferees, as the case may be, and such persons shall have the obligation to sell such Shares upon written request; provided, however, that if Awardee’s cessation of Service occurs within
180 days after the Shares were issued, then, in lieu of the foregoing period, the Repurchase Right shall be exercisable by the Company during the 180 day period that commences on the 180 first (181st) day after such issue date. 

(b)    Implementation of Repurchase Right. The Repurchase Right shall be exercised by giving written notice to
Awardee or Awardee’s personal representative, estate, heirs, legatees, or Permitted Transferees, as the case may be, within the applicable period described in the preceding sentence, of the Company’s intention to purchase Shares and
stating the number of Shares to be purchased. The completion of the purchase shall take place at the principal office of the Company or such other location specified by the Company, no later than the fifteenth (15th) business day after the delivery
of such notice. The per-share purchase price for Shares purchased pursuant to this Section 8 shall be equal to the Fair Market Value on the purchase date. The Fair Market Value of Shares shall be
determined in good faith by the Administrator of the Company in accordance with the terms of the Plan. In making such determination, the Administrator may take into account any valuation factors it deems appropriate or advisable in its sole
discretion, including, without limitation, profitability, financial position, asset value or other factor relating to the value of the Company, as well as discounts to account for minority interests and lack of marketability. In the discretion of
the Company, payment of the purchase price will be made via delivery of cash, check, wire transfer, cancellation of indebtedness, a promissory note, or a combination of such methods, against delivery of certificates or other instruments representing
the Shares so purchased, appropriately endorsed or executed by the holder. Any such promissory note will provide for substantially equal installments, payable at least annually, over a period not to exceed five years and will accrue interest at the
applicable federal rate in effect under Section 1274(d) of the Internal Revenue Code of 1986, as amended, as of the settlement date, compounded annually. 

(c)    Limitation on and Expiration of Repurchase Right. Notwithstanding the foregoing, the Repurchase Right of the
Company described in this Section 8 shall terminate upon the closing of the first public offering of securities of the Company that is effected pursuant to a registration statement filed with, and declared effective by, the Securities and
Exchange Commission under the Securities Act or the exchange of the Shares for shares of an entity that are so registered. 

9.    Drag-Along Right. Notwithstanding anything contained herein to the contrary, if at any time any shareholder
of the Company, or group of shareholders, owning a majority or more of the voting capital stock of the Company (hereinafter, collectively the “Transferring Shareholders”) proposes to enter into any transaction involving
(a) a sale of more than 50% of the outstanding voting capital stock of the Company in a non-public sale or (b) any merger, share exchange, consolidation or other reorganization or business
combination of the Company immediately after which a majority of the directors of the surviving entity is not comprised of persons who were directors of the Company immediately prior to such transaction or after which persons who hold a majority of
the voting capital stock of the surviving entity are not persons who held voting capital stock of the Company immediately prior to such transaction (a
“Change-in-Control Transaction”) the Company may require Awardee to participate in such Change-in-Control Transaction with respect to all or such number of Awardee’s Shares as the Company may specify in its discretion, by giving Awardee written notice thereof at least 10 days in advance of
the date of the transaction or the date that tender is required, as the case may be. Upon receipt of such notice, Awardee shall tender the specified number of Shares, at the same price and upon the same terms and conditions applicable to the
Transferring Shareholders in the transaction or, in the discretion of the acquirer or successor to the Company, upon payment of the purchase price to Awardee in immediately available funds. In addition, if at any time the Company and/or any
Transferring Shareholders propose to enter into any such Change in Control transaction, the Company may require Awardee to vote in favor of such transaction, where approval of the shareholders is required by law or otherwise sought, by giving
Awardee notice thereof within the time prescribed by law and the Company’s Certificate of Incorporation and Bylaws for giving notice of a meeting of shareholders called for the purpose of approving such transaction. If the Company requires such
vote, Awardee agrees that he or she will, if requested, deliver his or her proxy to the person designated by the Company to vote his or her Shares in favor of such
Change-in-Control Transaction. 

 10.    Company’s Right to Defer Payments. Notwithstanding
anything herein to the contrary, no payment shall be made under this Agreement, or under any promissory note issued by the Company pursuant to this Agreement, that would cause the Company to violate any law, or any rights or preference of preferred
shareholders of the Company, any banking agreement or loan or other financial covenant or cause default of any senior indebtedness of the Company, regardless of when such agreement, covenant or indebtedness was created, incurred or assumed. Any
payment under this Agreement that would cause such violation or default shall be deferred until, in the sole discretion of the Board of Directors of the Company, such payment shall no longer cause any such violation or default. Any payment deferred
in consequence of the provisions of the preceding sentence shall bear simple interest from the date such payment would otherwise have been made to the date when such payment is actually made, at a rate which is equal to the prime rate of interest
published in the Wall Street Journal on the date such payment would otherwise have been made, but in no event shall such rate of interest exceed 10% per annum. The Company shall pay interest at the same time as it makes the payment to which such
interest relates. 
 11.    Restrictive Legend. All certificates representing Shares shall have affixed thereto a
legend in substantially the following form, in addition to any other legends that may be required under federal or state securities laws: 

The shares of stock represented by this certificate are subject to restrictions on transfer, an option to purchase and a market stand-off agreement set forth in a certain Restricted Stock Award Notice and Restricted Stock Award Agreement (collectively, the “Agreement”) between the corporation and the registered owner of this
certificate (or his or her predecessor in interest), and no transfer of such shares may be made without compliance with the Agreement. A copy of the Agreement is available for inspection at the office of the corporation upon appropriate request
without charge. 
 The securities represented by this stock certificate have not been registered under the Securities Act of 1933 (the
“Act”) or applicable state securities laws (the “State Acts”), and shall not be sold, pledged, hypothecated, donated, or otherwise transferred (whether or not for consideration) by the holder except upon the
issuance to the corporation of a favorable opinion of its counsel and/or submission to the corporation of such other evidence as may be satisfactory to counsel for the corporation, to the effect that any such transfer shall not be in violation of
the Act and the State Acts. 
 12.    Investment Representations. Awardee represents, warrants and covenants as
follows: 
 (a)    Awardee is acquiring the Shares for Awardee’s own account for investment only, and not with a
view to, or for sale in connection with, any distribution of the Shares in violation of the Securities Act, or any rule or regulation under the Securities Act. 

(b)    Awardee understands that the Shares are being issued without registration under the Securities Act, in reliance upon
one or more exemptions contained in the Securities Act, and such reliance is based in part on the above representation. Awardee also understands that the Company is not obligated to comply with the registration requirements of the Securities Act or
with the requirements for an exemption under Regulation A under the Securities Act for Awardee’s benefit. 

(c)    Awardee has had such opportunity as Awardee deemed adequate to obtain from representatives of the Company such
information as is necessary to permit Awardee to evaluate the merits and risks of the acquiring the Shares. 

(d)    Awardee has sufficient experience in business, financial and investment matters to be able to evaluate the risks
involved in the acquisition of the Shares and to make an informed investment decision with respect to such acquisition. 

 (e)    Awardee can afford a complete loss of the value of the Shares and
is able to bear the economic risk of holding such Shares for an indefinite period. 
 (f)    Awardee understands that
(i) the Shares have not been registered under the Securities Act and are “restricted securities” within the meaning of Rule 144 under the Securities Act; (ii) the Shares cannot be sold, transferred or otherwise disposed of
unless they are subsequently registered under the Securities Act or an exemption from registration is then available and, therefore, they may need to be held indefinitely; and (iii) there is now no registration statement on file with the
Securities and Exchange Commission with respect to any stock of the Company and the Company has no obligation or current intention to register the Shares under the Securities Act. As a condition to any transfer of the Shares, Awardee understands
that the Company may require an opinion of counsel satisfactory to the Company to the effect that such transfer does not require registration under the Securities Act or any state securities law. 

13.    Adjustments for Stock Splits, Stock Dividends, etc. 

(a)    If from time to time there is any spin-off, stock split-up, stock dividend, stock distribution or other reclassification of the Common Stock of the Company, any and all new, substituted or additional securities to which Awardee is entitled by reason of his or her
ownership of the Shares shall be immediately subject to the restrictions on transfer and other provisions of this Agreement in the same manner and to the same extent as the Shares. 

(b)    If the Shares are converted into or exchanged for, or shareholders of the Company receive by reason of any
distribution in total or partial liquidation, securities of another corporation, or other property (including cash), pursuant to any merger of the Company or acquisition of its assets, then the rights of the Company under this Agreement shall inure
to the benefit of the Company’s successor, and this Agreement shall apply to the securities or other property received upon such conversion, exchange or distribution in the same manner and to the same extent as the Shares. 

14.    Market Stand-Off. Following the effective date of a registration
statement of the Company filed under the Securities Act, Awardee, for the duration specified by and to the extent requested by the Company and an underwriter of Common Stock or other securities of the Company, shall not offer, sell, contract to
sell, pledge or otherwise dispose of, directly or indirectly, any equity securities of the Company, or any securities convertible into or exchangeable or exercisable for such securities, enter into a transaction which would have the same effect, or
enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of such securities, whether any such aforementioned transaction is to be settled by delivery of such securities or
other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or disposition, or to enter into any such transaction, swap, hedge or other arrangement, in each case during the seven days prior to and
the 180 days after the effectiveness of any underwritten offering of the Company’s equity securities (or such longer or shorter period as may be requested in writing by the managing underwriter and agreed to in writing by the Company) (the
“Market Stand-Off Period”), except as part of such underwritten registration if otherwise permitted. In addition, Awardee agrees to execute any further letters, agreements and/or other
documents requested by the Company or its underwriters which are consistent with the terms of this Section 14. The Company may impose stop-transfer instructions with respect to securities subject to the foregoing restrictions until the end of
such Market Stand-Off Period. 
 15.    The Company’s Rights. None
of the Shares, this Agreement or any of the transactions or agreements contemplated thereby shall affect in any way the right or power of the Company or its stockholders to make or authorize any or all adjustments, recapitalizations, reorganizations
or other changes in the Company’s capital structure or its business, or any merger or consolidation of the Company, or any issue of bonds, debentures, preferred or other stocks with preference ahead of or convertible into, or otherwise
affecting the Common Stock or the rights thereof, or the dissolution or liquidation of the Company, or any sale or transfer of all or any part of the Company’s assets or business, or any other corporate act or proceeding, whether of a similar
character or otherwise. 

 16.    Tax Consequences. 

(a)    Awardee has reviewed with Awardee’s own tax advisors the federal, state, local and foreign tax consequences of
this investment and the transactions contemplated by this Agreement. Awardee is relying solely on such advisors and not on any statements or representations of the Company or any of its agents. Awardee understands that Awardee (and not the Company)
shall be responsible for Awardee’s own tax liability that may arise as a result of the transactions contemplated by this Agreement. Awardee understands that Section 83 of the Code taxes as ordinary income the difference between the
purchase price for the Shares and the fair market value of the Shares as of the date any restrictions on the Shares lapse. In this context, “restriction” includes the provisions regarding the forfeiture of Unvested Shares. 

(b)    Upon the vesting of any Shares and, prior to the delivery of any Shares to Awardee or the release of any Shares
from escrow, the Company shall have the right, in its discretion, to require Awardee to remit to the Company an amount sufficient to satisfy any federal, state, and local taxes that the Company determines are required to be withheld with respect to
such Shares. Awardee further agrees that if he or she does not remit such amounts prior to the date the Shares vest under the Vesting Schedule, the Company shall have the right, in its discretion, to withhold from the Shares such number of Shares
having a fair market value, as determined by the Administrator in its discretion, equal to or less than the minimum amount of taxes required to be withheld with respect to the Shares. For this purpose, the fair market value of the withheld Shares
shall be determined as of the date the forfeiture conditions lapse (vesting date). 
 (c)    Awardee further authorizes,
at the time that any Shares vest, in whole or in part, or at any time thereafter as requested by the Company, the Company to withhold from payroll or any other payment of any kind due to Awardee and otherwise agree to make adequate provision for
foreign, federal, state and local taxes required by law to be withheld, if any, which arise in connection with the vesting of the Shares. The Company may, in its sole discretion, permit you to satisfy, in whole or in part, any withholding tax
obligation which may arise in connection with the Shares either by electing to have the Company withhold from the Shares to be released from escrow that number of Shares, or by electing to deliver to the Company already-owned shares, in either case
having a fair market value, as determined by the Board in its discretion, not in excess of the amount necessary to satisfy the statutory minimum withholding amount due. 

17.    Conformity with Plan. This Agreement is intended to conform in all respects with, and is subject to all
applicable provisions of, the Plan. Any conflict between the terms of this Agreement and the Plan shall be resolved in accordance with the terms of the Plan. In the event of any ambiguity in this Agreement or any matters as to which this Agreement
is silent, the Plan shall govern. A copy of the Plan is provided to you with this Agreement. 
 18.    Section
409A. This Agreement and the Awards granted hereunder are intended to comply with, or otherwise be exempt from, Section 409A of the Code. Nothing in this Agreement shall be construed as including any feature for the deferral of compensation
other than the deferral of recognition of income until the lapse of the forfeiture conditions in accordance with Section 83 of the Code. Should any provision of this Agreement be found not to comply with, or otherwise be exempt from, the
provisions of Section 409A of the Code, it may be modified and given effect, in the sole discretion of the Administrator and without requiring Awardee’s consent, in such manner as the Administrator determines to be necessary or appropriate
to comply with, or to effectuate an exemption from, Section 409A of the Code. The foregoing, however, shall not be construed as a guarantee by the Company of any particular tax effect to Awardee. 

19.    Electronic Delivery of Documents. By your signing the Notice, you (a) consent to the electronic
delivery of this Agreement, all information with respect to the Plan and the Shares, and any reports of the Company provided generally to the Company’s stockholders; (b) acknowledge that you may receive from the Company a paper copy of any
documents delivered electronically at no cost to you by contacting the Company by telephone or in writing; (c) further acknowledge that you may revoke your consent to the electronic delivery of documents at any time by notifying the Company of
such revoked consent by telephone, postal service or electronic mail; and (d) further acknowledge that you understand that you are not required to consent to electronic delivery of documents. 

 20.    No Future Entitlement. By execution of the Notice, you
acknowledge and agree that: (a) the grant of the Shares is a one-time benefit which does not create any contractual or other right to receive future grants of stock-based awards, or compensation in lieu
of stock-based awards, even if stock-based awards have been granted repeatedly in the past; (b) all determinations with respect to any such future grants, including, but not limited to, the times when stock-based awards shall be granted or
shall become exercisable (as applicable), the maximum number of shares subject to each stock-based awards, and the purchase price (as applicable), will be at the sole discretion of the Administrator; (c) the Company does not guarantee any
future value of the Shares; and (g) no claim or entitlement to compensation or damages arises if the Shares do not increase in value and you irrevocably release the Company from any such claim that does arise. 

21.    No Rights To Employment. Nothing contained in the Notice, this Agreement or the Plan shall confer any right
on an individual to continue in the service of the Company or shall interfere in any way with the right of the Company to terminate such service at any time with or without cause or notice and whether or not such termination results in (a) the
failure of any stock-based award to vest; (b) the forfeiture of any unvested or vested portion of any stock-based award; and/or (c) any other adverse effect on the individual’s interest under the Notice, this Agreement or the Plan.

 22.    Personal Data. For the purpose of implementing, administering and managing the Shares, you, by
execution of the Notice, consent to the collection, receipt, use, retention and transfer, in electronic or other form, of your personal data by and among the Company and its third party vendors or any potential party to any Change in Control
transaction or capital raising transaction involving the Company. You understand that personal data (including but not limited to, name, home address, telephone number, employee number, employment status, social security number, tax identification
number, date of birth, nationality, job and payroll location, data for tax withholding purposes and shares awarded, cancelled, exercised, vested and unvested) may be transferred to third parties assisting in the implementation, administration and
management of the Shares and the Plan and you expressly authorize such transfer as well as the retention, use, and the subsequent transfer of the data by the recipient(s). You understand that these recipients may be located in your country or
elsewhere, and that the recipient’s country may have different data privacy laws and protections than your country. You understand that data will be held only as long as is necessary to implement, administer and manage the Shares. You
understand that you may, at any time, request a list with the names and addresses of any potential recipients of the personal data, view data, request additional information about the storage and processing of data, require any necessary amendments
to data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing the Company’s Secretary. You understand, however, that refusing or withdrawing your consent may affect your ability to accept a stock option.

 23.    Risk and Financial Information Disclosure. For purposes of claiming an exemption from registration
under Rule 12h-1(f)(1) under the Securities Exchange Act of 1934, the Company may decide to provide you, every six (6) months, with the information described in Rules 701(e)(3), (4), and (5) under
the Securities Act of 1933 (risk and financial information relating to the Company), with any such financial statements being not more than 180 days old. Any such information may be provided either by physical or electronic delivery or by written
notice of the availability of the information on an Internet site that may be password-protected and of any password needed to access the information. You may be required to execute an agreement to keep the information confidential as a condition
precedent to the provision of the information. Any such agreement shall be executed in such manner and form as the Administrator may require from time to time. Notwithstanding the foregoing, the Company shall have no initial or continuing obligation
to provide you with the information described in this Section 23, except as otherwise required by applicable law. 

24.    Invalidity or Unenforceability. It is the intention of the Company and Awardee that this Agreement shall be
enforceable to the fullest extent allowed by law. In the event that a court having jurisdiction holds any provision of this Agreement to be invalid or unenforceable, in whole or in part, the Company and Awardee agree that, if allowed by law, that
provision shall be reduced to the degree necessary to render it valid and enforceable without affecting the rest of this Agreement. 

 25.    Waiver. No delay or omission by the Company in exercising
any right under this Agreement shall operate as a waiver of that or any other right. A waiver or consent given by the Company on any one occasion shall be effective only in that instance and shall not be construed as a bar or waiver of any right on
any other occasion. 
 26.    Binding Effect. This Agreement shall be binding upon and inure to the benefit of
the Company and Awardee and their respective heirs, executors, administrators, legal representatives, successors and assigns, subject to the terms, conditions and restrictions set forth in this Agreement. The Company may assign its rights under this
Agreement to a third party, provided that such assignee agrees to be bound by all of the Company’s obligations under this Agreement. 

27.    Notices. All notices and other communications made or given pursuant to this Agreement shall be in writing
and shall be sufficiently made or given if hand delivered or mailed by certified mail, addressed to Awardee at the address contained in the records of the Company, or addressed to the Company for the attention of its Company Secretary at its
principal executive office or, if the receiving party consents in advance, transmitted and received via telecopy or via such other electronic transmission mechanism as may be available to the parties. 

28.    Headings; Pronouns. The headings in this Agreement are for reference purposes only and shall not affect the
meaning or interpretation of this Agreement. Whenever the context may require, any pronouns used in this Agreement shall include the corresponding masculine, feminine or neuter forms, and the singular form of nouns and pronouns shall include the
plural, and vice versa. 
 29.    Awardee. Whenever the word “Awardee” is used in any
provision of this Agreement under circumstances where the provision should logically be construed, as determined by the Administrator, to apply to Awardee’s estate, personal representative, beneficiary to whom the Shares may be
transferred by will or by the laws of descent and distribution, transferees, successors or assignees, “Awardee” shall be deemed to include such persons. 

30.    Entire Agreement. This Agreement, together with the correlating Notice and the Plan, contain the entire
agreement between you and the Company with respect to the Shares. Any oral or written agreements, representations, warranties, written inducements, or other communications made prior to the execution of this Agreement with respect to the Shares
shall be void and ineffective for all purposes. 
 31.    Amendment. This Agreement may be amended or modified
only by a written instrument executed by both the Company and Awardee. 
 32.    Governing Law. The validity,
construction, and effect of this Agreement, and of any determinations or decisions made by the Administrator relating to this Agreement, and the rights of any and all persons having or claiming to have any interest under this Agreement, shall be
determined exclusively in accordance with the laws of the State of Delaware, without regard to its provisions concerning the applicability of laws of other jurisdictions. Any suit with respect hereto will be brought in the federal or state courts in
the district which includes the city or town in which the Company’s principal executive office is located, and you hereby agree and submit to the personal jurisdiction and venue thereof. 

{Glossary begins on next page} 

 GLOSSARY 

(a)    “Affiliate” has the meaning set forth in the Plan. 

(b)    “Cause” has the meaning ascribed to such term or words of similar import in your written
employment or service contract with the Company as in effect at the time at issue and, in the absence of such agreement or definition, means your (i) conviction of, or plea of nolo contendere to, a felony or crime involving moral turpitude;
(ii) fraud on or misappropriation of any funds or property of the Company, any affiliate, customer or vendor; (iii) personal dishonesty, incompetence, willful misconduct, willful violation of any law, rule or regulation (other than minor
traffic violations or similar offenses) or breach of fiduciary duty which involves personal profit; (iv) willful misconduct in connection with your duties or willful failure to perform your responsibilities in the best interests of the Company;
(v) illegal use or distribution of drugs; (vi) violation of any Company rule, regulation, procedure or policy; or (vii) breach of any provision of any employment, non-disclosure, non-competition, non-solicitation or other similar agreement executed by you for the benefit of the Company, including without limitation this Agreement, all as determined by
the Administrator, which determination will be conclusive. 
 (c)    “Change in Control” has the
meaning set forth in the Plan. 
 (d)    “Code” means the Internal Revenue Code of 1986, as
amended. 
 (e)    “Company” includes Datadog, Inc. and its Affiliates, except where the context
otherwise requires. For purposes of determining whether a Change in Control has occurred, Company shall mean only Datadog, Inc. 

(f)    “Fair Market Value” of a share of Common Stock generally means either the closing price or
the average of the high and low sale price per share of Common Stock on the relevant date, as determined in the Administrator’s discretion, as reported by the principal market or exchange upon which the Common Stock is listed or admitted for
trade. Refer to the Plan for a detailed definition of Fair Market Value, including how Fair Market Value is determined in the event that no sale of Common Stock is reported on the relevant date. 

(g)    “Service” means your employment or other service relationship with the Company and its
Affiliates. Your Service will be considered to have ceased with the Company and its Affiliates if, immediately after a sale, merger or other corporate transaction, the trade, business or entity with which you are employed or otherwise have a service
relationship is not the Company or its successor or an Affiliate of the Company or its successor. 

(h)    “You” or “Your” means the recipient of the award of Shares as
reflected on the Restricted Stock Award Notice. Whenever the Agreement refers to “you” under circumstances where the provision should logically be construed, as determined by the Administrator, to apply to your estate, personal
representative, or beneficiary to whom the Shares may be transferred by will or by the laws of descent and distribution, the word “you” shall be deemed to include such person. 

 EXHIBIT A 

ASSIGNMENT SEPARATE FROM CERTIFICATE 

FOR VALUE RECEIVED I, ____________________________________, hereby sell, assign and transfer unto Datadog, Inc. __________________________
(____________) shares of the Common Stock of Datadog, Inc., standing in my name of the books of said corporation represented by ______ herewith and do hereby irrevocably constitute and appoint ___________________________ to transfer the said stock
on the books of the within named corporation with full power of substitution in the premises. 
 This Stock Assignment may be used only in
accordance with the Restricted Stock Award Notice and Restricted Stock Award Agreement between Datadog, Inc. and the undersigned dated ________________________, 20___. 

 

	
	
	   

	Signature
	
	   

	Date

 INSTRUCTIONS: Please do not fill in any blanks other than the signature line. The purpose of this assignment is
to enable the Company to effect the forfeiture of any Unvested Shares, as set forth in the Agreement, without requiring additional signatures on the part of Awardee. 

 EXHIBIT B 

JOINT ESCROW INSTRUCTIONS 

[DATE] 
 Company Secretary 

Datadog, Inc. 

	
	   

	   

 Dear Company Secretary: 

As Escrow Agent for both Datadog, Inc., a Delaware corporation (the “Company”), and the undersigned recipient of stock of the Company
(“Awardee”), you are hereby authorized and directed to hold the documents delivered to you pursuant to the terms of that certain Restricted Stock Award Notice and Restricted Stock Award Agreement (collectively, the “Agreement”)
between the Company and the undersigned, in accordance with the following instructions: 
 1.    In the event that
Awardee’s stock in the Company is forfeited in accordance with the terms of the Agreement, the Company shall give to Awardee and you a written notice specifying the number of shares of stock that are forfeited and the effective date of such
forfeiture. Awardee and the Company hereby irrevocably authorize and direct you to close the transaction contemplated by such notice in accordance with the terms of said notice. 

2.    At the closing, you are directed (a) to date the stock assignments necessary for the transfer in question,
(b) to fill in the number of shares being transferred, and (c) to deliver same, together with the certificate evidencing the shares of stock to be transferred, to the Company or its assignee. 

3.    Awardee irrevocably authorizes the Company to deposit with you any certificates evidencing shares of stock to be held
by you hereunder and any additions and substitutions to said shares as defined in the Agreement. Awardee does hereby irrevocably constitute and appoint you as Awardee’s
attorney-in-fact and agent for the term of this escrow to execute with respect to such securities all documents necessary or appropriate to make such securities
negotiable and to complete any transaction herein contemplated, including but not limited to the filing with any applicable state blue sky authority of any required applications for consent to, or notice of transfer of, the securities. Subject to
the provisions of this paragraph 3, Awardee shall exercise all rights and privileges of a stockholder of the Company while the stock is held by you. 

4.    Upon written request of Awardee, but no more than once per calendar year, you shall deliver to Awardee a certificate
or certificates representing so many shares of stock as are not then unvested. Within 30 days after Awardee ceases to be a Service provider, you shall deliver to Awardee a certificate or certificates representing the aggregate number of shares held
or issued pursuant to the Agreement and not forfeited to the Company or its assignees pursuant to the Agreement. 

5.    If at the time of termination of this escrow you should have in your possession any documents, securities, or other
property belonging to Awardee, you shall deliver all of the same to Awardee and shall be discharged of all further obligations hereunder. 

6.    Your duties hereunder may be altered, amended, modified or revoked only by a writing signed by all of the parties
hereto. 
 7.    You shall be obligated only for the performance of such duties as are specifically set forth herein and
may rely and shall be protected in relying or refraining from acting on any instrument reasonably believed by you to be genuine and to have been signed or presented by the proper party or parties. You shall not be personally liable for any act you
may do or omit to do hereunder as Escrow Agent or as attorney-in-fact for Awardee while acting in good faith, and any act done or omitted by you pursuant to the advice
of your own attorneys shall be conclusive evidence of such good faith. 

 8.    You are hereby expressly authorized to disregard any and all
warnings given by any of the parties hereto or by any other person or corporation, excepting only orders or process of courts of law, and are hereby expressly authorized to comply with and obey orders, judgments or decrees of any court. In case you
obey or comply with any such order, judgment or decree, you shall not be liable to any of the parties hereto or to any other person, firm or corporation by reason of such compliance, notwithstanding any such order, judgment or decree being
subsequently reversed, modified, annulled, set aside, vacated or found to have been entered without jurisdiction. 

9.    You shall not be liable in any respect on account of the identity, authorities or rights of the parties executing or
delivering or purporting to execute or deliver the Agreement or any documents or papers deposited or called for hereunder. 

10.    You shall not be liable for the outlawing of any rights under the statute of limitations with respect to these Joint
Escrow Instructions or any documents deposited with you. 
 11.    You shall be entitled to employ such legal counsel and
other experts as you may deem necessary properly to advise you in connection with your obligations hereunder, may rely upon the advice of such counsel, and may pay such counsel reasonable compensation therefore. 

12.    Your responsibilities as Escrow Agent hereunder shall terminate if you shall cease to be an officer or agent of the
Company or if you shall resign by written notice to each party. In the event of any such termination, the Company shall appoint a successor Escrow Agent. 

13.    If you reasonably require other or further instruments in connection with these Joint Escrow Instructions or
obligations in respect hereto, the necessary parties hereto shall join in furnishing such instruments. 
 14.    It is
understood and agreed that should any dispute arise with respect to the delivery and/or ownership or right of possession of the securities held by you hereunder, you are authorized and directed to retain in your possession without liability to
anyone all or any part of said securities until such disputes shall have been settled either by mutual written agreement of the parties concerned or by a final order, decree or judgment of a court of competent jurisdiction after the time for appeal
has expired and no appeal has been perfected, but you shall be under no duty whatsoever to institute or defend any such proceedings. 

15.    Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively given upon
personal delivery or upon deposit in the United States Post Office, by registered or certified mail with postage and fees prepaid, addressed to each of the other parties thereunto entitled at the following addresses or at such other addresses as a
party may designate by ten days’ advance written notice to each of the other parties hereto. 
  

					
	COMPANY:	 	Datadog, Inc.
		 	 
		 	 
		 	Attn:	 	 
		
	AWARDEE	 	 [AWARDEE]
 [ADDRESS]

[CITY, STATE ZIP]

		
	ESCROW AGENT:    	 	 Company Secretary
 Datadog,
Inc.

		 	 

 16.    By signing these Joint Escrow Instructions, you become a party
hereto only for the purpose of said Joint Escrow Instructions; you do not become a party to the Agreement. 
 17.    This
instrument shall be binding upon and inure to the benefit of the parties hereto, and their respective successors and permitted assigns. 

18.    These Joint Escrow Instructions shall be governed by, and construed and enforced in accordance with, the internal
substantive laws, but not the choice of law rules, of Delaware. 
  

			
	Sincerely,
	
	DATADOG, INC.
		
	By:	 	 
		 	Name:
		 	Title:
		
	Date:	 	 

  

			
	AWARDEE:
	
	   

	[AWARDEE NAME]
		
	Date:	 	 
	
	ESCROW AGENT:
	
	   

	Company Secretary
		
	Date:	 	

 EXHIBIT C 

CONSENT OF SPOUSE 
 I,
________________________________, spouse of ________________________________, have read and approve the foregoing Restricted Stock Award Notice and Restricted Stock Award Agreement (collectively, the “Agreement”). In
consideration of the Company’s grant to my spouse of the shares of Datadog, Inc., as set forth in the Agreement, I hereby appoint my spouse as my attorney-in-fact
in respect to the exercise of any rights under the Agreement and agree to be bound by the provisions of the Agreement insofar as I may have any rights in said Agreement or any shares issued pursuant thereto under the community property laws or
similar laws relating to marital property in effect in the state of our residence as of the date of the signing of the foregoing Agreement. 
  

	
	
	   

	Signature of Spouse
	
	   

	Date

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