Document:

EX-10.2

 Exhibit 10.2 

BIGCOMMERCE HOLDINGS, INC. 

FOURTH AMENDED AND RESTATED VOTING AGREEMENT 

 BIGCOMMERCE HOLDINGS, INC. 

FOURTH AMENDED AND RESTATED VOTING AGREEMENT 

THIS FOURTH AMENDED AND RESTATED VOTING AGREEMENT (the “Agreement”) is made and entered into as of this 19th day of
April, 2018, by and among BigCommerce Holdings, Inc., a Delaware corporation (the “Company”), each holder of the Company’s Series A Preferred Stock, $0.0001 par value per share (“Series A Preferred
Stock”), Series B Preferred Stock, $0.0001 par value per share (“Series B Preferred Stock”), Series C Preferred Stock, $0.0001 par value per share (“Series C Preferred Stock”), Series D
Preferred Stock, $0.0001 par value per share (“Series D Preferred Stock”), Series D-1 Preferred Stock, $0.0001 par value per share (“Series
D-1 Preferred Stock”), Series E Preferred Stock, $0.0001 par value per share (“Series E Preferred Stock”), Series E-1 Preferred
Stock, $0.0001 par value per share (“Series E-1 Preferred Stock”) and Series F Preferred Stock, $0.0001 par value (“Series F Preferred Stock,” and referred to
herein collectively with the Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock, Series E Preferred Stock, and Series E-1 Preferred Stock, as the “Preferred Stock”) listed on Schedule A (together with any subsequent investors, or transferees, who become parties hereto as “Investors” pursuant
to Subsections 7.1(a) or 7.2 below, the “Investors”) and those certain stockholders of the Company listed on Schedule B (together with any subsequent stockholders or optionholders, or any transferees, who
become parties hereto as “Key Holders” pursuant to Subsections 7.1(b) or 7.2 below, the “Key Holders,” and together collectively with the Investors, the “Stockholders”). 

A. The Company and certain Stockholders are party to that certain Third Amended and Restated Voting Agreement, dated April 28, 2016 (the
“Prior Agreement”). Concurrently with the execution of this Agreement, the Company and certain Investors are entering into a Series F Preferred Stock Purchase Agreement (the “Purchase Agreement”)
providing for the issuance of shares of the Company’s Series F Preferred Stock, and in connection with that agreement the parties desire to amend and restate the Prior Agreement in its entirety as set forth in this Agreement. 

B. The Fifth Amended and Restated Certificate of Incorporation of the Company (the “Restated
Certificate”) provides that (a) the holders of record of the shares of the Company’s Series A Preferred Stock and Series B Preferred Stock, voting together as a single class on an
as-converted basis, shall be entitled to elect one (1) director of the Company, (b) the holders of record of the shares of the Company’s Series C Preferred Stock, exclusively and as a separate
class, shall be entitled to elect one (1) director of the Company, (c) the holders of record of the shares of the Company’s Series D Preferred Stock, exclusively and as a separate class, shall be entitled to elect one
(1) director of the Company, (d) the holders of record of the shares of the Company’s Series E Preferred Stock, exclusively and as a separate class, shall be entitled to elect one (1) director of the Company, (e) the holders
of record of the shares of common stock of the Company, $0.0001 par value (“Common Stock”), exclusively and as a separate class, shall be entitled to elect one (1) director of the Company, (f) the holders of record
of shares of Preferred Stock, voting together as a single class on an as-converted basis, shall be entitled to elect two (2) directors of the Company, and (g) the holders of record of the shares of
Common Stock and of any other class or series of voting stock (including Preferred Stock), exclusively and voting together as a single class, shall be entitled to elect the balance of the total number of directors of the Company, if any. 

C. The parties also desire to enter into this Agreement to set forth their agreements and understandings with respect to how shares of the
Company’s capital stock held by them will be voted on, or tendered in connection with, an acquisition of the Company. 

 NOW, THEREFORE, the parties agree as follows: 

1. Voting Provisions Regarding Board of Directors. 

1.1 Size of the Board. Each Stockholder agrees to vote, or cause to be voted (with the Series
D-1 Preferred Stock and Series E-1 Preferred Stock subject, in each case, to the Regulatory Voting Restriction (as defined in the Restated Certificate)), all Shares (as
defined below) owned by such Stockholder, or over which such Stockholder has voting control, from time to time and at all times, in whatever manner as shall be necessary to ensure that the size of the Company’s Board of Directors (the
“Board”) shall be set and remain at seven (7) directors. Subject to the proviso at the end of this sentence, the term “Shares” shall mean any securities of the Company the holders of which are
entitled to vote for members of the Board, including without limitation, all shares of Common Stock, Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series
D-1 Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock, by whatever name called, now owned or subsequently acquired by a Stockholder, however
acquired, whether through stock splits, stock dividends, reclassifications, recapitalizations, similar events or otherwise; provided however, for purposes of this Section 1, the term “Shares”
shall expressly exclude any and all shares of (i) Non-Voting Common Stock (as defined in the Restated Certificate) and (ii) Series F Preferred Stock ((i) and (ii) collectively, the “Non-Voting Shares”). 
 1.2 Board Composition. Each Stockholder agrees to vote, or
cause to be voted, (with the Series D-1 Preferred Stock and Series E-1 Preferred Stock subject, in each case, to the Regulatory Voting Restriction) all Shares owned by
such Stockholder, or over which such Stockholder has voting control, from time to time and at all times, in whatever manner as shall be necessary to ensure that at each annual or special meeting of stockholders at which an election of directors is
held or pursuant to any written consent of the stockholders, the following persons shall be elected to the Board: 
 (a) One
(1) individual designated by the holders of a majority of the Series A Preferred Stock and Series B Preferred Stock, voting together as a single class on an as-converted basis, which individual shall
initially be Lawrence Bohn, for so long as such Stockholders and their Affiliates continue to own beneficially any shares of Common Stock of the Company (including shares of Common Stock issued or issuable upon conversion of Series A Preferred Stock
or Series B Preferred Stock). 
 (b) One (1) individual designated by Revolution Growth II, LP, which individual shall initially be
Scott Hilleboe, for so long as Revolution Growth II, LP and its Affiliates continue to own beneficially at least 4,098,360 shares of Common Stock of the Company (including shares of Common Stock issued or issuable upon conversion of Series C
Preferred Stock). 
 (c) One (1) individual designated by SoftBank PrinceVille Investments, L.P., which seat shall initially be vacant,
for so long as SoftBank PrinceVille Investments, L.P. and its Affiliates continue to own beneficially at least 3,853,564 shares of Common Stock of the Company (including shares of Common Stock issued or issuable upon conversion of Series D Preferred
Stock). 
 (d) One (1) individual designated by GGV Capital V L.P., which individual shall initially be Jeff Richards, for so long as
GGV Capital V L.P. and its Affiliates continue to own beneficially at least 5,196,965 shares of Common Stock of the Company (including shares of Common Stock issued or issuable upon conversion of Series E Preferred Stock). 

  
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 (e) For so long as any shares of Common Stock remain outstanding, one (1) individual
designated by the holders of a majority of the outstanding shares of Common Stock (excluding shares of Common Stock issued or issuable upon conversion of Preferred Stock), who shall be the Company’s Chief Executive Officer, who shall initially
be Brent Bellm (the “CEO Director”); provided that if for any reason the CEO Director shall cease to serve as the Chief Executive Officer of the Company, each of the Stockholders shall promptly vote their respective Shares
(i) to remove the former Chief Executive Officer from the Board if such person has not resigned as a member of the Board; and (ii) to elect such person’s replacement as Chief Executive Officer of the Company as the new CEO Director.

 (f) Two (2) individuals designated by the majority vote or consent of the then current Board, who shall initially be Lorrie
Norrington and Don Clarke. 
 To the extent that any of clauses (a) through (f) above shall not be applicable, any member of the Board who would
otherwise have been designated in accordance with the terms thereof shall instead be voted upon as provided in the Company’s Restated Certificate. 

For purposes of this Agreement, an individual, firm, corporation, partnership, association, limited liability company, trust or any other entity
(collectively, a “Person”) shall be deemed an “Affiliate” of another 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 now or hereafter existing that is controlled by one or more general partners or managing members of, or shares the same management
company with, such Person. A Person shall be deemed to control another Person if such first Person possesses, directly or indirectly, the power to direct, or cause the direction of, the management and policies of the second Person, whether through
the ownership of voting securities, by contract or otherwise. 
 1.3 Failure to Designate a Board Member. In the absence of any
designation from the Persons or groups with the right to designate a director as specified above, the director previously designated by them and then serving shall be reelected if still eligible to serve as provided herein. 

1.4 Removal of Board Members. Each Stockholder also agrees to vote, or cause to be voted, (with the Series D-1 Preferred Stock and Series E-1 Preferred Stock subject, in each case, to the Regulatory Voting Restriction) all Shares owned by such Stockholder, or over which such
Stockholder has voting control, from time to time and at all times, in whatever manner as shall be necessary to ensure that: 
 (a) no
director elected pursuant to Section 1 of this Agreement may be removed from office unless (i) such removal is directed or approved by the affirmative vote of the Person(s) entitled under
Subsection 1.2 to designate that director or (ii) the Person(s) originally entitled to designate or approve such director or occupy such Board seat pursuant to Subsection 1.2 is no longer so entitled to
designate or approve such director or occupy such Board seat; 
 (b) any vacancies created by the resignation, removal or death of a
director elected pursuant to this Section 1 shall be filled pursuant to the provisions of this Section 1; and 

(c) upon the request of any party entitled to designate a director as provided in Subsection 1.2 to remove such director, such director
shall be removed. 
 All Stockholders agree to execute any written consents required to perform the obligations of this Agreement, and the Company agrees at
the request of any party entitled to designate directors to call a special meeting of stockholders for the purpose of electing directors. 

1.5 No Liability for Election of Recommended Directors. No Stockholder, nor any Affiliate of any Stockholder, shall have any liability
as a result of designating a person for election as a director for any act or omission by such designated person in his or her capacity as a director of the Company, nor shall any Stockholder have any liability as a result of voting for any such
designee in accordance with the provisions of this Agreement. 

  
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 1.6 Subsidiary Board Covenant. The Company covenants and agrees that any action of
the board of directors of BigCommerce Pty Ltd, an Australian proprietary company and wholly owned subsidiary of the Company (“BigCommerce AUS”) and BigCommerce, Inc., a Texas corporation and wholly owned subsidiary of the
Company (“BigCommerce TX”) will require and be subject to the prior written approval of the Company as sole shareholder of BigCommerce AUS or BigCommerce TX, as applicable (each of which will require the prior approval of the
Board, including the approval of the director elected pursuant to Section 1.2(a), the director elected pursuant to Section 1.2(b), the director elected pursuant to
Section 1.2(c) and the director elected pursuant to Section 1.2(d)). 
 2. Vote to
Increase Authorized Common Stock. Each Stockholder agrees to vote, or cause to be voted, (with the Series D-1 Preferred Stock and Series E-1 Preferred Stock subject,
in each case, to the Regulatory Voting Restriction) all Shares owned by such Stockholder, or over which such Stockholder has voting control, from time to time and at all times, in whatever manner as shall be necessary to increase the number of
authorized shares of Common Stock from time to time to ensure that there will be sufficient shares of Common Stock available for conversion of all of the shares of Preferred Stock outstanding at any given time; provided however,
notwithstanding the preceding sentence, the holders of Series F Preferred Stock and the holders of Non-Voting Common Stock will not be required to take any action or vote their shares in any manner other than
as set forth in, and pursuant to, the Restated Charter. 
 3. Drag-Along Right. 

3.1 Definitions. A “Sale of the Company” shall mean either: (a) a transaction or series of related
transactions in which a Person, or a group of related Persons, acquires from stockholders of the Company shares representing more than fifty percent (50%) of the outstanding voting power of the Company (except one in which the holders of capital
stock of the Company immediately prior to such transaction continue to hold at least a majority of the voting power of the capital stock of the surviving corporation) (a “Stock Sale”); or (b) a transaction that qualifies
as a “Deemed Liquidation Event” as defined in the Restated Certificate. 
 3.2 Actions to be Taken. In the
event that (i) the Board and (ii) the holders of a majority of the outstanding A-E Preferred Stock (as defined in the Restated Certificate), voting as a single class on an as-converted basis, ((i) and (ii) collectively, the “Stockholder Majority,” sometimes referred to herein as the “Selling Stockholders”), approve a Sale of the
Company in writing, specifying that this Section 3 shall apply to such transaction, and such Sale of the Company is pursuant to an arm’s length offer or invitation in good faith, then each Stockholder and the Company
hereby agree to the below (the “Drag-Along Right”) (with the Series D-1 Preferred Stock and the Series E-1 Preferred Stock subject, in each case,
to the Regulatory Voting Restriction): 
 (a) if such transaction requires stockholder approval, with respect to all Shares (except for the Non-Voting Shares) that such Stockholder owns or over which such Stockholder otherwise exercises voting power, to vote (in person, by proxy or by action by written consent, as applicable) all Shares (other than the Non-Voting Shares) in favor of, and adopt, such Sale of the Company (together with any related amendment to the Restated Certificate required in order to implement such Sale of the Company) and to vote all Shares
(other than the Non-Voting Shares) in opposition to any and all other proposals that could reasonably be expected to delay or impair the ability of the Company to consummate such Sale of the Company; 

  
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 (b) if such transaction is a Stock Sale, to sell the same proportion of shares of capital
stock of the Company beneficially held by such Stockholder as is being sold by the Selling Stockholders to the Person to whom the Selling Stockholders propose to sell their Shares, and on the same terms and conditions as the Selling Stockholders;

 (c) to execute and deliver all related documentation and take such other action in support of the Sale of the Company as shall reasonably
be requested by the Company or the Selling Stockholders in order to carry out the terms and provision of this Section 3, including without limitation executing and delivering instruments of conveyance and transfer, and any
purchase agreement, merger agreement, indemnity agreement, escrow agreement, consent, waiver, governmental filing, share certificates duly endorsed for transfer (free and clear of impermissible liens, claims and encumbrances) and any similar or
related documents; 
 (d) not to deposit, and to cause their Affiliates not to deposit, except as provided in this Agreement, any Shares of
the Company owned by such party or Affiliate in a voting trust or subject any Shares to any arrangement or agreement with respect to the voting of such Shares, unless specifically requested to do so by the acquiror in connection with the Sale of the
Company; 
 (e) to refrain from exercising any dissenters’ rights or rights of appraisal under applicable law at any time with respect
to such Sale of the Company; 
 (f) if the consideration to be paid in exchange for the Shares pursuant to this
Section 3 includes any securities and due receipt thereof by any Stockholder would require under applicable law (x) the registration or qualification of such securities or of any person as a broker or dealer or agent
with respect to such securities or (y) the provision to any Stockholder of any information other than such information as a prudent issuer would generally furnish in an offering made solely to “accredited investors” as defined in
Regulation D promulgated under the Securities Act of 1933, as amended, the Company may cause to be paid to any such Stockholder in lieu thereof, against surrender of the Shares which would have otherwise been sold by such Stockholder, an amount in
cash equal to the fair value (as determined in good faith by the Company) of the securities which such Stockholder would otherwise receive as of the date of the issuance of such securities in exchange for the Shares; and 

(g) solely with respect to Stockholders other than Goldman, Sachs & Co. (“Goldman”), in the event that the
Selling Stockholders, in connection with such Sale of the Company, appoint a stockholder representative (the “Stockholder Representative”) with respect to matters affecting the Stockholders under the applicable definitive
transaction agreements following consummation of such Sale of the Company, (x) to consent to (i) the appointment of such Stockholder Representative, (ii) the establishment of any applicable escrow, expense or similar fund in
connection with any indemnification or similar obligations, and (iii) the payment of such Stockholder’s pro rata portion (from the applicable escrow or expense fund or otherwise) of any and all reasonable fees and expenses to such
Stockholder Representative in connection with such Stockholder Representative’s services and duties in connection with such Sale of the Company and its related service as the representative of the Stockholders, and (y) not to assert any
claim or commence any suit against the Stockholder Representative or any other Stockholder with respect to any action or inaction taken or failed to be taken by the Stockholder Representative in connection with its service as the Stockholder
Representative, absent fraud or willful misconduct. 
 3.3 Procedure. 

(a) If the Stockholder Majority elects to exercise the Drag-Along Right, the Stockholder Majority must send a notice to all Stockholders (the
“Drag-Along Notice”) setting out: 

  
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 (i) the proposed purchase price to be paid in connection with the Sale of the Company; and

 (ii) any other terms on which all of the shares are to be sold, including the proposed closing date for the Sale of the Company and
containing copies of the documents required to be executed to effect the Sale of the Company. 
 (b) Unless otherwise approved by the
Stockholder Majority, the closing of the Sale of the Company shall take place at the Company’s registered office and at the time and on the date specified in the Drag-Along Notice. 

(c) The Drag-Along Notice and all obligations thereunder (including any obligations under Subsection 3.2) shall terminate if the
Stockholder Majority do not sell and transfer all of the shares which they hold as described under the Drag-Along Notice. 
 3.4
Exceptions. Notwithstanding the foregoing, a Stockholder will not be required to comply with Subsection 3.2 above in connection with any proposed Sale of the Company (the “Proposed Sale”) unless: 

(a) any representations and warranties to be made by such Stockholder in connection with the Proposed Sale are limited to representations and
warranties related to authority, ownership and the ability to convey title to such Shares, including but not limited to representations and warranties that (i) the Stockholder holds all right, title and interest in and to the Shares such
Stockholder purports to hold, free and clear of all liens and encumbrances, (ii) the obligations of the Stockholder in connection with the transaction have been duly authorized, if applicable, (iii) the documents to be entered into by the
Stockholder have been duly executed by the Stockholder and delivered to the acquirer and are enforceable against the Stockholder in accordance with their respective terms and (iv) neither the execution and delivery of documents to be entered
into in connection with the transaction, nor the performance of the Stockholder’s obligations thereunder, will cause a breach or violation of the terms of any agreement, law or judgment, order or decree of any court or governmental agency; 

(b) the Stockholder shall not be liable for the inaccuracy of any representation or warranty made by any other Person in connection with the
Proposed Sale, other than the Company (except to the extent that funds may be paid out of an escrow established to cover breach of representations, warranties and covenants of the Company as well as breach by any stockholder of any of identical
representations, warranties and covenants provided by all stockholders); 
 (c) no Stockholder, its Affiliates or its successors shall be
compelled to approve or make any representation or warranty (other than provisions relating to its equity ownership in the Company) with respect to, approve or enter into any amendment of, or waive any of its rights or claims under, any provision of
any commercial agreement with the Company, including without limitation any provision intended to address the regulatory status of American Express Travel Related Services Company, Inc. (“AXP”); 

(d) the liability for indemnification, if any, of such Stockholder in the Proposed Sale and for the inaccuracy of any representations and
warranties made by the Company or its Stockholders in connection with such Proposed Sale, is several and not joint with any other Person (except to the extent that funds may be paid out of an escrow established to cover breach of representations,
warranties and covenants of the Company as well as breach by any stockholder of any of identical representations, warranties and covenants provided by all stockholders), and, except with respect to liability for breaches of representations made by
the stockholders, is pro rata in proportion to, and does not exceed, the amount of consideration paid to such Stockholder in connection with such Proposed Sale; 

  
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 (e) liability shall be limited to such Stockholder’s applicable share (determined
based on the respective proceeds payable to each Stockholder in connection with such Proposed Sale in accordance with the provisions of the Restated Certificate) of a negotiated aggregate indemnification amount that applies equally to all
Stockholders but that in no event exceeds the amount of consideration otherwise payable to such Stockholder in connection with such Proposed Sale, except with respect to claims related to fraud by such Stockholder, the liability for which need not
be limited as to such Stockholder; 
 (f) upon the consummation of the Proposed Sale, (i) each holder of each class or series of the
Company’s stock will receive the same form of consideration for their shares of such class or series as is received by other holders in respect of their shares of such same class or series of stock, (ii) each holder of a series of
Preferred Stock will receive the same amount of consideration per share of such series of Preferred Stock as is received by other holders in respect of their shares of such same series (and in the case of holders of shares of Series D-1 Preferred Stock, no less than every other holder of shares of Series D Preferred Stock that participates in the Proposed Sale with respect to such shares of Series D Preferred Stock, and in the case of holders
of shares of Series E-1 Preferred Stock, no less than every other holder of shares of Series E Preferred Stock that participates in the Proposed Sale with respect to such shares of Series E Preferred Stock),
(iii) each holder of Common Stock will receive the same amount of consideration per share of Common Stock as is received by other holders in respect of their shares of Common Stock, and (iv) the aggregate consideration receivable by all holders
of the Preferred Stock and Common Stock shall be allocated among the holders of Preferred Stock and Common Stock in accordance with the Company’s Certificate of Incorporation in effect immediately prior to the Proposed Sale; 

(g) such Stockholder is not required to enter into any agreement imposing non-competition, non-solicitation or similar covenants on such Stockholder (except any Stockholder who is an employee of the Company at the time of the Proposed Sale); 

(h) such Proposed Sale results in the sale of 100% of the Company’s outstanding capital stock; and 

(i) solely with respect to any Sale of the Company consummated prior to January 1, 2020, the holders of Series F Preferred Stock shall
not have any obligation to comply with any of the provisions of Section 3.2(a) if such Sale of the Company would result in proceeds payable to the holders of Series F Preferred Stock in cash and freely tradeable securities
in an aggregate amount per share of Series F Preferred Stock that is less than 1.5 times the Series F Original Issue Price (as defined in the Restated Charter and subject to appropriate adjustment in the event of any stock dividend, stock
split, combination or other similar recapitalization with respect to the Series F Preferred Stock). 
 3.5 Stock Sale. No Stockholder
shall be a party to any Stock Sale unless such Stock Sale is conducted in accordance with the Right of First Refusal and Co-Sale Agreement, dated on the date hereof, by and among the Company and the
Stockholders listed there, as such may be amended from time to time, and the consideration received pursuant to such transaction is allocated among the parties thereto in the manner specified in the Company’s Certificate of Incorporation in
effect immediately prior to the Stock Sale (as if such transaction were a Deemed Liquidation Event). 

  
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 4. Remedies. 

4.1 Covenants of the Company. The Company agrees to use its best efforts, within the requirements of applicable law, to ensure that the
rights granted under this Agreement are effective and that the parties enjoy the benefits of this Agreement. Such actions include, without limitation, the use of the Company’s best efforts to cause the nomination and election of the directors
as provided in this Agreement. 
 4.2 Irrevocable Proxy and Power of Attorney. Each Proxy Party (as defined below) hereby constitutes
and appoints, as the proxies of the party and hereby grants a power of attorney to the President of the Company, and a designee of the Selling Stockholders (which proxy holder shall not be a Regulated Holder or its BHCA Transferees (each, as defined
in the Restated Certificate)), and each of them, with full power of substitution, with respect to the matters set forth herein, including without limitation, election of persons as members of the Board in accordance with
Section 1 hereto, votes to increase authorized shares pursuant to Section 2 hereof and votes regarding any Sale of the Company pursuant to Section 3 hereof, and hereby
authorizes each of them to represent and to vote, if, but not only if, the party (i) fails to vote or (ii) attempts to vote (whether by proxy, in person or by written consent), in a manner which is inconsistent with the terms of this
Agreement, all of such party’s Shares in favor of the election of persons as members of the Board determined pursuant to and in accordance with the terms and provisions of this Agreement or the increase of authorized shares or approval of any
Sale of the Company pursuant to and in accordance with the terms and provisions of Sections 2 and 3, respectively, of this Agreement or to take any action necessary to effect Sections 2 and 3, respectively, of this
Agreement (and with respect to the Series D-1 Preferred Stock and Series E-1 Preferred Stock, in each such case subject to the Regulatory Voting Restriction). Each of
the proxy and power of attorney granted pursuant to the immediately preceding sentence is given in consideration of the agreements and covenants of the Company and the parties in connection with the transactions contemplated by this Agreement and,
as such, each is coupled with an interest and shall be irrevocable unless and until this Agreement terminates or expires pursuant to Section 6 hereof. Each party hereto hereby revokes any and all previous proxies or powers
of attorney with respect to the Shares and shall not hereafter, unless and until this Agreement terminates or expires pursuant to Section 6 hereof, purport to grant any other proxy or power of attorney with respect to any
of the Shares, deposit any of the Shares into a voting trust or enter into any agreement (other than this Agreement), arrangement or understanding with any person, directly or indirectly, to vote, grant any proxy or give instructions with respect to
the voting of any of the Shares, in each case, with respect to any of the matters set forth herein. “Proxy Party” means (i) initially, all parties to this Agreement other than Goldman, and (ii) following any breach
by Goldman of any of the voting requirements set forth in Sections 1, 2 or 3 hereof that are applicable to Goldman, all parties to this Agreement including Goldman. 

4.3 Specific Enforcement. Each party acknowledges and agrees that each party hereto will be irreparably damaged in the event any of the
provisions of this Agreement are not performed by the parties in accordance with their specific terms or are otherwise breached. Accordingly, it is agreed that each of the Company and the Stockholders shall be entitled to an injunction to prevent
breaches of this Agreement, and to specific enforcement of this Agreement and its terms and provisions in any action instituted in any court of the United States or any state having subject matter jurisdiction. 

4.4 Remedies Cumulative. All remedies, either under this Agreement or by law or otherwise afforded to any party, shall be cumulative and
not alternative. 
 4.5 Conversion of Series D-1 Preferred Stock. If shares of Series D-1 Preferred Stock are converted into shares of
Series D Preferred Stock in connection with a Permitted Regulatory Transfer (as defined in the Restated Certificate) pursuant to the Restated Certificate and, at the time of any such conversion, there are insufficient authorized shares of Series D
Preferred Stock to permit the full conversion of such applicable shares of Series D-1 Preferred Stock, then prior to the closing of any such conversion, 

  
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each Stockholder agrees to vote or cause to be voted all Shares (other than the Non-Voting Shares) owned by such Stockholder, or over which such
Stockholder has voting control (with the Series D-1 Preferred Stock and the Series E-1 Preferred Stock subject to the Regulatory Voting Restriction), from time to time,
in whatever manner as shall be necessary to increase the number of authorized shares of Series D Preferred Stock to ensure that there will be sufficient shares of Series D Preferred Stock available for conversion of Series D-1 Preferred Stock upon
such Permitted Regulatory Transfer. 
 4.6 Conversion of Series E-1 Preferred Stock. If shares
of Series E-1 Preferred Stock are converted into shares of Series E Preferred Stock in connection with a Permitted Regulatory Transfer (as defined in the Restated Certificate) pursuant to the Restated
Certificate and, at the time of any such conversion, there are insufficient authorized shares of Series E Preferred Stock to permit the full conversion of such applicable shares of Series E-1 Preferred Stock,
then prior to the closing of any such conversion, each Stockholder agrees to vote or cause to be voted all Shares (other than the Non-voting Shares) owned by such Stockholder, or over which such Stockholder
has voting control (with the Series D-1 Preferred Stock and the Series E-1 Preferred Stock subject to the Regulatory Voting Restriction), from time to time, in whatever
manner as shall be necessary to increase the number of authorized shares of Series E Preferred Stock to ensure that there will be sufficient shares of Series E Preferred Stock available for conversion of Series
E-1 Preferred Stock upon such Permitted Regulatory Transfer. 
 5. “Bad
Actor” Matters 
 5.1 Representation. Each Person other than Goldman with the right to designate or
participate in the designation of a director pursuant to this Agreement hereby represents that none of the “bad actor” disqualifying events described in Rule 506(d)(1)(i)-(viii) promulgated under the Securities Act (a
“Disqualification Event”) is applicable to such Person or any of its Rule 506(d) Related Parties, except, if applicable, for a Disqualification Event as to which Rule 506(d)(2)(ii) or (iii) or (d)(3) is applicable.
For purposes of this Agreement, “Rule 506(d) Related Party” shall mean a person or entity covered by the “Bad Actor disqualification” provision of Rule
506(d) of the Securities Act. 
 5.2 Covenants. 

(a) Each Person other than Goldman and General Catalyst Group V, L.P. and its Affiliates with the right to designate or participate in the
designation of a director pursuant to this Agreement hereby agrees that it shall notify the Company promptly in writing in the event a Disqualification Event becomes applicable to such Person or any of its Rule 506(d) Related Parties, except, if
applicable, for a Disqualification Event as to which Rule 506(d)(2)(ii) or (iii) or (d)(3) is applicable. 
 (b) In the event the
Company proposes an offering of its securities in reliance on Rule 506 of the Securities Act, the Company intends to conduct an inquiry of all Investors and Key Holders that beneficially own 20% or more of the Company’s then outstanding voting
equity securities, calculated on the basis of voting power (each, a “20% Holder”), as to whether any 20% Holder or any Rule 506(d) Related Party of such 20% Holder is a “bad actor” within the meaning of Rule 506(d)
promulgated under the Securities Act (each, a “Bad Actor”). Each Stockholder other than Goldman hereby agrees that it shall provide information reasonably requested by the Company in order to conduct its inquiry within
five (5) business days after the date of the Company’s request therefor.
 6. Term. This Agreement shall be effective as of
the date hereof and shall continue in effect until and shall terminate upon the earliest to occur of (a) the consummation of the Company’s first underwritten public offering of its Common Stock (other than a registration statement relating
either to the sale of securities to employees of the Company pursuant to its stock option, stock purchase or similar plan or an SEC Rule 145 transaction); (b) the consummation of a Sale of the Company and distribution of

  
 9 

 
proceeds to or escrow for the benefit of the Stockholders in accordance with the Restated Certificate, provided that the provisions of Section 3 hereof will continue
after the closing of any Sale of the Company to the extent necessary to enforce the provisions of Section 3 with respect to such Sale of the Company, the provisions of Subsection 4.5 will continue so long as shares
of Series D-1 Preferred Stock remain outstanding and the provisions of Subsection 4.6 will continue so long as shares of Series E-1 Preferred Stock remain
outstanding; and (c) termination of this Agreement in accordance with Subsection 7.8 below. 
 7. Miscellaneous. 

7.1 Additional Parties. 

(a) Notwithstanding anything to the contrary contained herein, if the Company issues additional shares of Preferred Stock after the date
hereof, as a condition to the issuance of such shares the Company shall require that any purchaser of Preferred Stock become a party to this Agreement by executing and delivering (i) the Adoption Agreement attached to this Agreement as
Exhibit A, or (ii) a counterpart signature page hereto agreeing to be bound by and subject to the terms of this Agreement as an Investor and Stockholder hereunder. In either event, each such person shall thereafter shall be deemed an
Investor and Stockholder for all purposes under this Agreement. 
 (b) In the event that after the date of this Agreement, the Company
enters into an agreement with any Person to issue shares of capital stock to such Person (other than to a purchaser of Preferred Stock described in Subsection 7.1(a) above), following which such Person shall hold Shares constituting one
percent (1%) or more of the Company’s then outstanding capital stock (treating for this purpose all shares of Common Stock issuable upon exercise of or conversion of outstanding options, warrants or convertible securities, as if exercised
and/or converted or exchanged), then, the Company shall cause such Person, as a condition precedent to entering into such agreement, to become a party to this Agreement by executing an Adoption Agreement in the form attached hereto as Exhibit
A, agreeing to be bound by and subject to the terms of this Agreement as a Stockholder and thereafter such person shall be deemed a Stockholder for all purposes under this Agreement. 

7.2 Transfers. Each transferee or assignee of any Shares subject to this Agreement shall continue to be subject to the terms hereof,
and, as a condition precedent to the Company’s recognizing such transfer, each transferee or assignee shall agree in writing to be subject to each of the terms of this Agreement by executing and delivering an Adoption Agreement substantially in
the form attached hereto as Exhibit A. Upon the execution and delivery of an Adoption Agreement by any transferee, such transferee shall be deemed to be a party hereto as if such transferee were the transferor and such transferee’s
signature appeared on the signature pages of this Agreement and shall be deemed to be an Investor and Stockholder, or Key Holder and Stockholder, as applicable. The Company shall not permit the transfer of the Shares subject to this Agreement on its
books or issue a new certificate representing any such Shares unless and until such transferee shall have complied with the terms of this Subsection 7.2. Each certificate representing the Shares subject to this Agreement if issued on or after
the date of this Agreement shall be endorsed by the Company with the legend set forth in Subsection 7.11. 
 7.3 Successors and
Assigns. The terms and conditions of this Agreement shall inure to the benefit of and be binding upon the respective successors and assigns 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 assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement. 

7.4 Governing Law. This Agreement shall be governed by the internal law of the State of Delaware. 

  
 10 

 7.5 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 one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including pdf) 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. 
 7.6 Titles and Subtitles. The
titles and subtitles used in this Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement. 

7.7 Notices. All notices required or permitted hereunder shall be in writing and shall be deemed effectively given: (a) upon
personal delivery to the party to be notified, (b) when sent by confirmed electronic mail or facsimile if sent during normal business hours of the recipient; if not, then on the next business day, (c) five (5) days after having been sent
by registered or certified mail, return receipt requested, postage prepaid, or (d) one (1) day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. All communications
shall be sent to the party to be notified at the address as set forth on Schedule A or Schedule B hereof or a completed Exhibit A hereto, as applicable, or at such other address, facsimile or electronic mail address as such
party may designate by ten (10) days advance written notice to the other parties hereto given in accordance with this Subsection 7.7. If notice is given to the Company, it shall be sent to Four Points Centre, Building II, 11305 Four
Points Drive, Suite 300, Austin, Texas 78726, Attention: General Counsel; and a copy (which shall not constitute notice) shall also be sent to DLA Piper LLP (US), 401 Congress Avenue, Suite 2500, Austin, Texas 78701, Attn: Samer M. Zabaneh. 

7.8 Consent Required to Amend, Terminate or Waiver. This Agreement may be amended or terminated and the observance of any term
hereof may be waived (either generally or in a particular instance and either retroactively or prospectively) only by a written instrument executed by (a) the Company; and (b) the Stockholder Majority, with the Series D-1 Preferred Stock and the Series E-1 Preferred Stock treated as not subject to the Regulatory Voting Restriction for this purpose. Notwithstanding the foregoing: 

(a) This Agreement may not be amended or terminated and the observance of any term of this Agreement 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, as the case may be, in the same fashion. 

(b) Any provision hereof may be waived by the waiving party on such party’s own behalf, without the consent of any other party. 

(c) The provisions of Subsection 1.2 relating to rights of the Series A Preferred Stock and Series B Preferred Stock to elect
directors, and this Subsection 7.8(c), shall not be amended or waived without the written consent of the holders of a majority of the Series A Preferred Stock and Series B Preferred Stock, voting as a single class on an as-converted basis. 
 (d) The provisions of Subsection 1.2 relating to rights of the Series C
Preferred Stock to elect a director, and this Subsection 7.8(d) shall not be amended or waived without the written consent of the holders of a majority of the Series C Preferred Stock. 

(e) The provisions of Subsection 1.2 relating to rights of the Series D Preferred Stock to elect a director, and this Subsection
7.8(e), shall not be amended or waived without the written consent of the holders of at least two-thirds of the outstanding shares of Series D Preferred Stock. 

  
 11 

 (f) The provisions of Subsection 1.2 relating to rights of the Series E Preferred
Stock to elect a director and this Subsection 7.8(f) shall not be amended or waived without the written consent of the holders of at least 60% of the outstanding shares of Series E Preferred Stock. 

(g) The provisions of Subsection 1.6 relating to the BigCommerce AUS and BigCommerce TX board of directors, and this Subsection
7.8(g) shall not be amended or waived without the written consent of the Stockholder Majority. 
 (h) The provisions of Sections 3
(with respect to any specific reference to the Series D-1 Preferred Stock, Series E-1 Preferred Stock or Regulated Holders), 4.5, 4.6, 6 (with respect to any specific reference to the
Series D-1 Preferred Stock, Series E-1 Preferred Stock or Regulated Holders), 7.8(h), 7.18, 7.19 and any other specific reference in this Agreement to Series D-1 Preferred Stock or Series E-1 Preferred Stock, or the treatment thereof, a Regulated Holder, the Regulatory Voting Restriction or any provision intended to address the regulatory status of a Regulated Holder may be amended and the observance
of any term thereof may be waived (either generally or in a particular instance and either retroactively or prospectively) only with the written consent of (x) AXP in order to be enforceable against AXP and its affiliates (as defined in
Regulation Y (12 C.F.R. Part 225)) and (y) for so long as any Regulated Holder or its BHCA Transferee holds any shares of Series D-1 Preferred Stock or Series E-1 Preferred Stock, the holders of a
majority of the then-outstanding shares of Series D-1 Preferred Stock and Series E-1 Preferred Stock, voting together (with the Series D-1 Preferred Stock and the
Series E-1 Preferred Stock treated as not subject to the Regulatory Voting Restriction for this purpose) in order to be enforceable against any Regulated Holder or BHCA Transferee. 

(i) The provisions of Sections 3, 4.2, 5.1 and 5.2, in each case, as they apply to Goldman, this
Section 7.8(i), and any other specific reference in this Agreement to Goldman shall not be amended and the observance of any such term thereof shall not be waived (either generally or in a particular instance and either
retroactively or prospectively) without the prior written consent of Goldman. 
 The Company shall give prompt written notice of any amendment, termination
or waiver hereunder to any party that did not consent in writing thereto. Any amendment, termination or waiver effected in accordance with this Subsection 7.8 shall be binding on each party and all of such party’s successors and
permitted assigns, whether or not any such party, successor or assignee entered into or approved such amendment, termination or waiver. For purposes of this Subsection 7.8, the requirement of a written instrument may be satisfied in the form
of an action by written consent of the Stockholders circulated by the Company and executed by the Stockholder parties specified, whether or not such action by written consent makes explicit reference to the terms of this Agreement. 

7.9 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 non-breaching or non-defaulting party nor shall it be
construed to be a waiver of any such breach or default, or an acquiescence therein, or of or in 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 previously or thereafter occurring. Any waiver, permit, consent or approval of any kind or character on the part of any party of any breach or default under this Agreement, or any waiver on the part of any party of any provisions or
conditions of this Agreement, must be in writing and shall be effective only to the extent specifically set forth in such writing. All remedies, either under this Agreement or by law or otherwise afforded to any party, shall be cumulative and not
alternative. 
 7.10 Severability. The invalidity or unenforceability of any provision hereof shall in no way affect the validity or
enforceability of any other provision. 

  
 12 

 7.11 Legend on Share Certificates. Each certificate representing any Shares issued
after the date hereof shall be endorsed by the Company with a legend reading substantially as follows: 
 “THE SHARES EVIDENCED HEREBY
ARE SUBJECT TO A VOTING AGREEMENT, AS MAY BE AMENDED FROM TIME TO TIME, (A COPY OF WHICH MAY BE OBTAINED UPON WRITTEN REQUEST FROM THE COMPANY), AND BY ACCEPTING ANY INTEREST IN SUCH SHARES THE PERSON ACCEPTING SUCH INTEREST SHALL BE DEEMED TO AGREE
TO AND SHALL BECOME BOUND BY ALL THE PROVISIONS OF THAT VOTING AGREEMENT, INCLUDING CERTAIN RESTRICTIONS ON TRANSFER AND OWNERSHIP SET FORTH THEREIN.” 

The Company, by its execution of this Agreement, agrees that it will cause the certificates evidencing the Shares issued after the date hereof to bear the
legend required by this Subsection 7.11 of this Agreement, and it shall supply, free of charge, a copy of this Agreement to any holder of a certificate evidencing Shares upon written request from such holder to the Company at its principal
office. The parties to this Agreement do hereby agree that the failure to cause the certificates evidencing the Shares to bear the legend required by this Subsection 7.11 herein and/or the failure of the Company to supply, free of charge, a
copy of this Agreement as provided hereunder shall not affect the validity or enforcement of this Agreement. 
 7.12 Stock Splits, Stock
Dividends, etc. In the event of any issuance of Shares of the Company’s voting securities hereafter to any of the Stockholders (including, without limitation, in connection with any stock split, stock dividend, recapitalization,
reorganization, or the like), such Shares shall become subject to this Agreement and shall be endorsed with the legend set forth in Subsection 7.11. 

7.13 Manner of Voting. The voting of Shares pursuant to this Agreement may be effected in person, by proxy, by written consent or in any
other manner permitted by applicable law. For the avoidance of doubt, voting of the Shares pursuant to the Agreement need not make explicit reference to the terms of this Agreement. 

7.14 Further Assurances. At any time or from time to time after the date hereof, the parties agree to cooperate with each other, and at
the request of any other party, to execute and deliver any further instruments or documents and to take all such further action as the other party may reasonably request in order to evidence or effectuate the consummation of the transactions
contemplated hereby and to otherwise carry out the intent of the parties hereunder. 
 7.15 Aggregation of Stock. All Shares held or
acquired by a Stockholder and/or its 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. 
 7.16 Spousal Consent. If any individual Stockholder is married on the date of this Agreement, such
Stockholder’s spouse shall execute and deliver to the Company a consent of spouse in the form of Exhibit B hereto (“Consent of Spouse”), effective on the date hereof. Notwithstanding the execution and delivery
thereof, such consent shall not be deemed to confer or convey to the spouse any rights in such Stockholder’s Shares that do not otherwise exist by operation of law or the agreement of the parties. If any individual Stockholder should marry or
remarry subsequent to the date of this Agreement, such Stockholder shall within thirty (30) days thereafter obtain his/her new spouse’s acknowledgement of and consent to the existence and binding effect of all restrictions contained in
this Agreement by causing such spouse to execute and deliver a Consent of Spouse acknowledging the restrictions and obligations contained in this Agreement and agreeing and consenting to the same. 

  
 13 

 7.17 Entire Agreement. Upon the effectiveness of this Agreement, the Prior Agreement
shall be deemed amended and restated to read in its entirety as set forth in this Agreement. This Agreement (including the Exhibits hereto), the Restated Certificate, and the other Transaction Agreements (as defined in the Purchase Agreement)
constitute the full and entire understanding and agreement between 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. 
 7.18 Treatment of Series D-1 Preferred Stock and Series E-1
Preferred Stock. Unless otherwise set forth in this Agreement, for all purposes of this Agreement, the Series D-1 Preferred Stock and Series E-1 Preferred Stock shall be treated as being convertible
(without actual conversion) into shares of Common Stock at the then applicable conversion price of the Series D-1 Preferred Stock or the Series E-1 Preferred Stock as set forth in the Restated Certificate.

 7.19 Regulated Holder. In the event that a Regulated Holder or its BHCA Transferees is required or permitted to sell its shares
pursuant to Section 3, the Company, the Key Holders and the Investors will use commercially reasonable efforts to negotiate in good faith the terms of such transaction, as applicable, including without limitation the terms
and characteristics of any securities issued pursuant to such transaction and the form of any consideration paid, to comply with any regulatory requirements and practices applicable to the Regulated Holder or its BHCA Transferees.  

[Remainder of page intentionally left blank] 

  
 14 

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

			
	COMPANY:
	
	BIGCOMMERCE HOLDINGS, INC.
		
	By:	 	 /s/ Robert Alvarez

	Name:	 	Robert Alvarez
	Title:	 	Chief Financial Officer

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	KEY HOLDERS:
		
	Signature:	 	 /s/ Wadih Phillipe Machaalani

	Name:	 	Wadih Phillipe Machaalani
		
	Signature:	 	 /s/ Mitchell Harper

	Name:	 	Mitchell Harper

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	KEY HOLDERS:
		
	Signature:	 	 /s/ Brent Bellm

	Name:	 	Brent Bellm
		
	Signature:	 	 /s/ Robert Alvarez

	Name:	 	Robert Alvarez
		
	Signature:	 	 /s/ Russell Klein

	Name:	 	Russell Klein

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

													
	 INVESTORS:
  

GENERAL CATALYST GROUP V, L.P. 
	  		  	GC ENTREPRENEURS FUND V, L.P. 
					
	By:	 	 General Catalyst Partners V, L.P.

Its General Partner
	  		  	By:	  	 General Catalyst Partners V, L.P.

Its General Partner

							
		 	By:	 	 General Catalyst GP V, LLC
 Its General
Partner
	  		  		  	By:	  	 General Catalyst GP V, LLC
 Its General
Partner

							
		 	    By:	 	 /s/ Chris McCain
	  		  		  	    By:	  	 /s/ Chris McCain

		 		 	Name: Chris McCain	  		  		  		  	Name: Chris McCain
		 		 	Title: Chief Legal Officer	  		  		  		  	Title: Chief Legal Officer
			
	GENERAL CATALYST GROUP IV, L.P. 	  	            	  	GC ENTREPRENEURS FUND IV, L.P. 
					
	By:	 	 General Catalyst Partners IV, L.P.

Its General Partner
	  		  	By:	  	 General Catalyst Partners IV, L.P.

Its General Partner

							
		 	By:	 	 General Catalyst GP IV, LLC
 Its General
Partner
	  		  		  	By:	  	 General Catalyst GP IV, LLC
 Its General
Partner

							
		 	    By:	 	 /s/ Chris McCain
	  		  		  	    By:	  	 /s/ Chris McCain

		 		 	Name: Chris McCain	  		  		  		  	Name: Chris McCain
		 		 	Title: Chief Legal Officer	  		  		  		  	Title: Chief Legal Officer
					
	GENERAL CATALYST GROUP V SUPPLEMENTAL, L.P.	  		  		  		  	
						
	By:	 	 General Catalyst Partners V, L.P.

its General Partner
	  		  		  		  	
							
		 	By:	 	 General Catalyst GP V, LLC
 its General
Partner
	  		  		  		  	
							
		 	    By:	 	 /s/ Chris McCain
	  		  		  		  	
		 		 	Name: Chris McCain	  		  		  		  	
		 		 	Title: Chief Legal Officer	  		  		  		  	

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	REVOLUTION GROWTH II, LP
		
	By:	 	Revolution Growth GP II, LP
		 	its General Partner
		
	By:	 	Revolution Growth UGP II, LLC
		 	its General Partner
		
	By:	 	 /s/ Steven J. Murray

	Name:	 	Steven J. Murray
	Title:	 	Operating Manager

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	SOFTBANK PRINCEVILLE INVESTMENTS, L.P.
		
	By:	 	SB PV GP LP, its General Partner
		
	By:	 	SB PV GP LLC, its General Partner
		
	By:	 	 /s/ Steven J. Murray

	Name:	 	Steven J. Murray
	Title:	 	Managing Member

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	AMERICAN EXPRESS TRAVEL RELATED SERVICES COMPANY, INC.
		
	By:	 	 /s/ Lisa Marchese

	Name:	 	Lisa Marchese
	Title:	 	EVP – Head of Strategy and M&A

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	TELSTRA VENTURES PTY LIMITED
		
	By:	 	 /s/ Mark Sherman

	Name:	 	Mark Sherman
	Title:	 	Managing Director, Telstra Ventures Pty Limited
		
	By:	 	 /s/ Matthew Koertge

	Name:	 	Matthew Koertge
	Title:	 	Managing Director, Telstra Ventures Pty Limited

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	GGV CAPITAL V L.P.
		
	By:	 	GGV Capital V L.L.C., its General Partner
		
	By:	 	 /s/ Jeff Richards

	Name:	 	Jeff Richards
	Title:	 	Managing Director
	
	GGV CAPITAL V ENTREPRENEURS FUND L.P.
		
	By:	 	GGV Capital V L.L.C., its General Partner
		
	By:	 	 /s/ Jeff Richards

	Name:	 	Jeff Richards
	Title:	 	Managing Director

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	TENAYA CAPITAL VI, LP
		
	By:	 	Tenaya Capital VI GP, LLC,
		 	its General Partner
		
	By:	 	 /s/ Dave Markland

	Name:	 	Dave Markland
	Title:	 	Attorney-In-Fact

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	FLOODGATE FUND III, L.P. 
	on behalf of itself and as nominee for certain other individuals and entities
		
	By:	 	Floodgate Partners III, L.L.C.
		 	Its general partner
		
	By:	 	 /s/ Michael J. Maples Jr.

	Name:	 	Michael J. Maples Jr.
	Title:	 	Managing Member

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	THE WASHINGTON UNIVERSITY 
		
	By:	 	 /s/ Scott L. Wilson

	Name:	 	Scott L. Wilson
	Title:	 	Chief Investment Officer

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	eT Capital, L.P.
		
	By:	 	 /s/ Li-Chen Lin

	Name:	 	Li-Chen Lin
	Title:	 	Authorized Signatory

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

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

			
	GOLDMAN SACHS & CO. LLC
		
	By:	 	 /s/ Hillel Moerman

	Name:	 	Hillel Moerman
	Title:	 	Managing Director

 Signature Page to 

Fourth Amended and Restated Voting Agreement 

 SCHEDULE A 

INVESTORS 
 GENERAL
CATALYST GROUP V, L.P. (1) 
 20 University Road, Suite 450 

Cambridge, MA 02138 
 Attn: Chris McCain 

GC ENTREPRENEURS FUND V, L.P. (1) 

20 University Road, Suite 450 
 Cambridge, MA 02138 

Attn: Chris McCain 
 GENERAL
CATALYST GROUP IV, L.P. (1) 
 20 University Road, Suite 450 

Cambridge, MA 02138 
 Attn: Chris McCain 

GC ENTREPRENEURS FUND IV, L.P. (1) 

20 University Road, Suite 450 
 Cambridge, MA 02138 

Attn: Chris McCain 
 GENERAL
CATALYST GROUP V SUPPLEMENTAL, L.P. (1) 
 20 University Road, Suite 450 

Cambridge, MA 02138 
 Attn: Chris McCain 

Stephan Schambach 

Ricarda-Huch-Weg 16 

07743 Jena, Germany 
 FLOODGATE
FUND III, L.P. 
 820 Ramona Street, Suite 200 

Palo Alto, CA 94301 
 REVOLUTION
GROWTH II, LP (2) 
 1717 Rhode Island Avenue, N.W. 

Washington, DC 20036 
 SOFTBANK
PRINCEVILLE INVESTMENTS, L.P.(3) 
 38 Glen Avenue 

Newton, MA 02459 

 AMERICAN EXPRESS TRAVEL RELATED
SERVICES COMPANY, INC. 
 200 Vesey Street 

Mail Drop 51-03 
 New
York, NY 10285 
 Attn: General Counsel / Chief Development Officer 

TELSTRA VENTURES PTY LIMITED 

575 Market Street, Suite 1650 
 San Francisco, CA 94105 

COPY TO: TELSTRA CORPORATION LIMITED
LEVEL 41  
 242 Exhibition Street 

Melbourne, Victoria, 3000 Australia 

MILLENNIUM TECHNOLOGY VALUE PARTNERS II, LP 

32 Avenue of the Americas 
 17th Floor 

New York, NY 10013 
 MILLENNIUM
TECHNOLOGY VALUE PARTNERS II-A, LP 
 32 Avenue of the Americas 

17th Floor 
 New York, NY 10013 

TENAYA CAPITAL VI, LP 
 3280
Alpine Road 
 Portola Valley, CA 94028 

SPLIT ROCK PARTNERS II, LP  

10400 Viking Drive, Suite 250 
 Eden Prairie, MN 55344 

GGV CAPITAL V L.P. 
 3000 Sand Hill Road

 Building 4, Suite 230 
 Menlo Park, CA 94025 

Attention: Jeff Richards 
 GGV CAPITAL V
ENTREPRENEURS FUND L.P. 
 3000 Sand Hill Road 

Building 4, Suite 230 
 Menlo Park, CA 94025 

Attention: Jeff Richards 
 THE
WASHINGTON UNIVERSITY 
 11 North Jackson, Campus Box 1047 

St. Louis, MO 63105 
 Attention: Daniel Feder 

ET CAPITAL, L.P. 

KAL RAMAN 
 SVIC
NO. 32 NEW TECHNOLOGY BUSINESS INVESTMENT L.L.P. 

GOLDMAN SACHS & CO. LLC 

200 West Street 
 New York, New York 10282 

Attention: Hristo D. Dimitrov, VP & Associate General Counsel 

 (1) With a copy (which shall not constitute notice) to: 

Cooley LLP 
 500 Boylston Street 

Boston, MA 02116 
 Attn: Patrick Mitchell 

(2) With a copy (which shall not constitute notice) to: 

Cooley LLP 
 One Freedom Square 

Reston Town Center 
 11951 Freedom Drive 

Reston, VA 20190 
 Attn: Geoff Willard/Brian Burke 

(3) With a copy (which shall not constitute notice) to: 

Wilmer Cutler Pickering Hale and Dorr LLP 
 60 State
Street 
 Boston, MA 02109 
 Attn: Edwin C. Pease 

(4) With a copy (which shall not constitute notice) to: 

Weil, Gotshal & Manges LLP 
 201 Redwood Shores
Parkway 
 Redwood Shores, CA 94065 
 Attn: Eric Schwartzman

 5) With a copy (which shall not constitute notice) to: 

Lowenstein Sandler LLP 
 1251 Avenue of the Americas 

New York, New York 10020 
 Attn: Edward M. Zimmerman 

 SCHEDULE B 

KEY HOLDERS 
 WADIH
PHILLIPE MACHAALANI 
 MITCHELL HARPER 

BRENT BELLM 
 11305 Four
Points Drive 
 Building II, Third Floor 
 Austin, TX 78726 

ROBERT ALVAREZ 
 11305 Four
Points Drive 
 Building II, Third Floor 
 Austin, TX 78726 

RUSSELL KLEIN 
 11305 Four
Points Drive 
 Building II, Third Floor 
 Austin, TX 78726 

 EXHIBIT A 

ADOPTION AGREEMENT 
 This
Adoption Agreement (“Adoption Agreement”) is executed on ___________________, 20__, by the undersigned (the “Holder”) pursuant to the terms of that certain Fourth Amended and Restated Voting Agreement
dated as of April 19, 2018 (the “Agreement”), by and among the Company and certain of its Stockholders, as such Agreement may be amended or amended and restated hereafter. Capitalized terms used but not defined in this
Adoption Agreement shall have the respective meanings ascribed to such terms in the Agreement. By the execution of this Adoption Agreement, the Holder agrees as follows. 

1.1 Acknowledgement. Holder acknowledges that Holder is acquiring certain shares of the capital stock of the Company (the
“Stock”) for one of the following reasons (Check the correct box): 
  

	 	☐	 as a transferee of Shares from a party in such party’s capacity as an “Investor” bound by the
Agreement, and after such transfer, Holder shall be considered an “Investor” and a “Stockholder” for all purposes of the Agreement. 

  

	 	☐	 as a transferee of Shares from a party in such party’s capacity as a “Key Holder” bound by the
Agreement, and after such transfer, Holder shall be considered a “Key Holder” and a “Stockholder” for all purposes of the Agreement. 

  

	 	☐	 as a new Investor in accordance with Subsection 6.1(a) of the Agreement, in which case Holder will be an
“Investor” and a “Stockholder” for all purposes of the Agreement. 

  

	 	☐	 in accordance with Subsection 6.1(b) of the Agreement, as a new party who is not a new Investor, in
which case Holder will be a “Stockholder” for all purposes of the Agreement. 

 1.2 Agreement. Holder
hereby (a) agrees that the Stock, and any other shares of capital stock or securities required by the Agreement to be bound thereby, shall be bound by and subject to the terms of the Agreement and (b) adopts the Agreement with the same
force and effect as if Holder were originally a party thereto. 
 1.3 Notice. Any notice required or permitted by the Agreement shall
be given to Holder at the address or facsimile number listed below Holder’s signature hereto. 
  

					
	HOLDER:                                    
                                         
                      	 	            	  	ACCEPTED AND AGREED:
			
	By:                                     
                                         
                                    	 		  	BIGCOMMERCE HOLDINGS, INC.
	Name and Title of Signatory	 		  	
			
	Address:                                     
                                         
                          	 		  	By:                                     
                                         
                               
			
	  
	 		  	Title:                                     
                                         
                           
			
	Facsimile
Number:                                        
                                         
    	 		  	

 EXHIBIT B 

CONSENT OF SPOUSE 
 I,
____________________, spouse of ______________, acknowledge that I have read the Fourth Amended and Restated Voting Agreement, dated as of April 19, 2018, to which this Consent is attached as Exhibit B (the
“Agreement”), and that I know the contents of the Agreement. I am aware that the Agreement contains provisions regarding the voting and transfer of shares of capital stock of the Company that my spouse may own, including any
interest I might have therein. 
 I hereby agree that my interest, if any, in any shares of capital stock of the Company subject to the
Agreement shall be irrevocably bound by the Agreement and further understand and agree that any community property interest I may have in such shares of capital stock of the Company shall be similarly bound by the Agreement. 

I am aware that the legal, financial and related matters contained in the Agreement are complex and that I am free to seek independent
professional guidance or counsel with respect to this Consent. I have either sought such guidance or counsel or determined after reviewing the Agreement carefully that I will waive such right. 

 

					
	Dated:                                     
                                         
                               	 	            	  	  

		 		  	[Name of Key Holder’s Spouse, if any]EX-10.3

 Exhibit 10.3 

BIGCOMMERCE HOLDINGS, INC. 

FOURTH AMENDED AND RESTATED RIGHT OF 

FIRST REFUSAL AND CO-SALE AGREEMENT 

 BIGCOMMERCE HOLDINGS, INC. 

FOURTH AMENDED AND RESTATED RIGHT 

OF FIRST REFUSAL AND CO-SALE AGREEMENT 

THIS FOURTH AMENDED AND RESTATED RIGHT OF FIRST REFUSAL AND CO-SALE AGREEMENT (this
“Agreement”) is made as of the 19th day of April, 2018 by and among BigCommerce Holdings, Inc., a Delaware corporation (the “Company”), the
Investors listed on Schedule A, the Founders listed on Schedule B and the Key Holders listed on Schedule C. 

WHEREAS, each Key Holder is the beneficial owner of the number of shares of Capital Stock, or of options to purchase Common Stock, set forth
opposite the name of such Key Holder on Schedule B; 
 WHEREAS, each Investor holds shares of Preferred Stock of
the Company, par value $0.0001 per share (“Preferred Stock”); 
 WHEREAS, the Company, the Founders, the Key Holders
and certain Investors are party to that certain Third Amended and Restated Right of First Refusal and Co-Sale Agreement, dated April 28, 2016 (the “Prior Agreement”); and 

WHEREAS, concurrently with the execution of this Agreement, the Company and certain Investors are entering into a Series F Preferred Stock
Purchase Agreement providing for the issuance of shares of the Company’s Series F Preferred Stock, and in connection with that agreement the parties desire to amend and restate the Prior Agreement in its entirety as set forth in this Agreement.

 NOW, THEREFORE, the Company, the Founders, the Key Holders and the Investors agree as follows: 

1. Definitions. 
 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 now or hereafter existing which is controlled by one or more general partners or managing members of, or shares the same management company with, such Investor. A
Person shall be deemed to control another Person if such first Person possesses, directly or indirectly, the power to direct, or cause the direction of, the management and policies of the second Person, whether through the ownership of voting
securities, by contract or otherwise. 
 1.2. “Capital Stock” means (a) shares of Common Stock and Preferred
Stock (whether now outstanding or hereafter issued in any context), (b) shares of Common Stock issued or issuable upon conversion of Preferred Stock and (c) shares of Common Stock issued or issuable upon exercise or conversion, as applicable,
of stock options, warrants or other convertible securities of the Company, in each case now owned or subsequently acquired by any Founder, any Key Holder, any Investor, or their respective successors or permitted transferees or assigns. For purposes
of the number of shares of Capital Stock held by an Investor, Founder or Key Holder (or any other calculation based thereon), all shares of Preferred Stock shall be deemed to have been converted into Common Stock at the then-applicable conversion ratio. 

  
 1 

 1.3. “Change of Control” means a transaction or series of related
transactions in which a person, or a group of related persons, acquires from stockholders of the Company shares representing more than fifty percent (50%) of the outstanding voting power of the Company. 

1.4. “Common Stock” means shares of Common Stock of the Company, $0.0001 par value per share. 

1.5. “Eligible Stockholders” means the Investors and the Founders. 

1.6. “Exercising Stockholder Notice” means written notice from an Exercising Stockholder notifying the Company and the
Prospective Transferor that such Exercising Stockholder intends to exercise its Right of First Refusal as to a portion of the Transfer Stock with respect to any Proposed Transfer. 

1.7. “Founder” means the persons named on Schedule B hereto, each person to whom the rights of a Founder are
assigned pursuant to Subsection 3.1, each person who hereafter becomes a signatory to this Agreement pursuant to Subsection 5.9 and any one of them, as the context may require. 

1.8. “Investors” means the persons named on Schedule A hereto, each person to whom the rights
of an Investor are assigned pursuant to Subsections 3.1, each person who hereafter becomes a signatory to this Agreement pursuant to Subsections 5.9 or 5.11 and any one of them, as the context may require. 

1.9. “IPO” means the Company’s initial public offering. 

1.10. “Key Holders” means the persons named on Schedule C hereto, who shall be any
stockholder holding shares of Common Stock not issued or issuable upon conversion of Preferred Stock, which such shares of Common Stock constitute greater than one percent (1%) of the outstanding capital stock of the Company, with all shares held or
acquired by a stockholder and its affiliated investment funds aggregated together, each person to whom the rights of a Key Holder are assigned pursuant to Subsection 3.1, each person who hereafter becomes a signatory to this Agreement
pursuant to Subsection 5.9 or 5.17 and any one of them, as the context may require. 
 1.11. “Person”
means any natural person or any general partnership, limited partnership, limited liability partnership, limited liability limited partnership, corporation, joint venture, trust, business trust, cooperative, association, limited liability company or
other entity, including the heirs, executors, administrators, legal representatives, successors and assigns of such Person where the context so admits. 

1.12. “Preferred Stock” means collectively, all shares of Series A Preferred Stock, Series B Preferred Stock, Series C
Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock, and Series F Preferred Stock. 

1.13. “Proposed Transfer” means any assignment, sale, offer to sell, pledge, mortgage, hypothecation, encumbrance,
disposition of or any other like transfer or encumbering of any Transfer Stock (or any interest therein) proposed by any of the Founders, Investors or Key Holders. 

1.14. “Proposed Transfer Notice” means written notice from a Prospective Transferor setting forth the terms and
conditions of a Proposed Transfer. 

  
 - 2 - 

 1.15. “Prospective Transferee” means any person to whom a
Prospective Transferor proposes to make a Proposed Transfer. 
 1.16. “Requisite Investors” means the holders of a
majority of the Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock, and Series F Preferred Stock, voting together as a single class (on an as-converted to Common Stock basis, with the Series
D-1 Preferred Stock and Series E-1 Preferred Stock treated as being convertible into Common Stock (without actual conversion) for this purpose). 

1.17. “Restated Certificate” means the Company’s Fifth Amended and Restated Certificate of Incorporation, as
amended from time to time. 
 1.18. “Right of Co-Sale” means the right, but
not an obligation, of an Investor to participate in a Proposed Transfer on the terms and conditions specified in the Proposed Transfer Notice. 

1.19. “Right of First Refusal” means the right, but not an obligation, of the Eligible Stockholders, or their permitted
transferees or assigns, to purchase up to its pro rata portion (based upon the total number of shares of Common Stock and Preferred Stock (on an as converted basis) then held by all Eligible Investors) of any Transfer Stock with respect to a
Proposed Transfer, on the terms and conditions specified in the Proposed Transfer Notice. 
 1.20. “Series A Preferred
Stock” means shares of Series A Preferred Stock of the Company, $0.0001 par value per share. 
 1.21. “Series B
Preferred Stock” means shares of Series B Preferred Stock of the Company, $0.0001 par value per share. 
 1.22.
“Series C Preferred Stock” means shares of Series C Preferred Stock of the Company, $0.0001 par value per share. 

1.23. “Series D Preferred Stock” means shares of Series D Preferred Stock of the Company, $0.0001 par value per share.

 1.24. “Series D-1 Preferred Stock” means shares of Series D-1 Preferred Stock of the Company, $0.0001 par value per share. 
 1.25. “Series E Preferred
Stock” means shares of Series E Preferred Stock of the Company, $0.0001 par value per share. 
 1.26. “Series E-1 Preferred Stock” means shares of Series E-1 Preferred Stock of the Company, $0.0001 par value per share. 

1.27. “Series F Preferred Stock” means shares of Series F Preferred Stock of the Company, $0.0001 par value per share.

 1.28. “Stockholder” means the Founders, Investors and Key Holders. 

1.29. “Transfer Stock” means shares of Capital Stock owned by a Founder, Investor or Key Holder, or issued to a
Founder, Investor or Key Holder after the date hereof (including, without limitation, in connection with any stock split, stock dividend, recapitalization, reorganization, or the like), but does not include any shares of Preferred Stock or
Common Stock, in each case, issued or issuable upon conversion of Preferred Stock. 

  
 - 3 - 

 1.30. “Undersubscription Notice” means written notice from a Fully
Exercising Stockholder notifying the Company and the Prospective Transferor that such Fully Exercising Stockholder intends to exercise its option to purchase all or any portion of the Transfer Stock not purchased pursuant to the Exercising
Stockholder Notices. 
 2. Agreement Among the Company, the Investors, Founders and the Key Holders. 

2.1. Right of First Refusal. 

(a) Grant. Subject to the terms of Section 2.4 and Section 3 below, each
Stockholder (each “Prospective Transferor”) hereby unconditionally and irrevocably grants to the Eligible Stockholders a Right of First Refusal to purchase all or any portion of Transfer Stock that such Prospective Transferor
may propose to transfer in a Proposed Transfer, at the same price and on the same terms and conditions as those offered to the Prospective Transferee. 

(i) Notice. Each Prospective Transferor proposing to make a Proposed Transfer must deliver a Proposed Transfer Notice to the Company
and each Eligible Stockholder not later than sixty (60) days prior to the consummation of such Proposed Transfer. Such Proposed Transfer Notice shall contain the material terms and conditions, including: (i) the number and type of shares
to be transferred, (ii) the price and form of consideration, (iii) that in the event there are two or more Eligible Stockholders that choose to exercise the Right of First Refusal (each an “Exercising Stockholder”)
for a total number of shares in excess of the total available, the Transfer Stock will be allocated to such Exercising Stockholders pro rata in accordance with this Agreement, (iv) that an Exercising Stockholder wishing to purchase Transfer
Stock must so notify the Company before the expiration of the Offer Period, specifying the number of Transfer Stock that the Exercising Stockholder wishes to purchase, and (v) any other terms of the Prospective Transfer. To exercise his, her or
its Right of First Refusal under this Section 2, the Eligible Stockholder must deliver an Exercising Stockholder Notice to the Company and the Prospective Transferor within thirty (30) days after delivery of the
Proposed Transfer Notice (the “Offer Period”). 
 (b) Undersubscription of Transfer Stock. If options to
purchase have been exercised by the Exercising Stockholders with respect to some but not all of the Transfer Stock by the end of the Offer Period, then the Company shall, immediately after the expiration of the Offer Period, send written notice (the
“Company Undersubscription Notice”) to those Exercising Stockholders who fully exercised their Right of First Refusal within the Offer Period (the “Fully Exercising Stockholders”).
Each Fully Exercising Stockholder shall, subject to the provisions of this Subsection 2.1(b), have an additional option to purchase all or any part of the balance of any such remaining unsubscribed shares of Transfer Stock on the terms and
conditions set forth in the Proposed Transfer Notice. To exercise such option, a Fully Exercising Stockholder must deliver an Undersubscription Notice to the Prospective Transferor and the Company within ten (10) days after the expiration of
the Offer Period (the “Undersubscription Offer Period”). In the event there are two or more such Fully Exercising Stockholders that choose to exercise the last-mentioned option for a total number of remaining shares in excess
of the number available, the remaining shares available for purchase under this Subsection 2.1(b) shall be allocated to such Fully Exercising Stockholders pro rata based on the number of shares of Transfer Stock such Fully Exercising
Stockholders have elected to purchase pursuant to the Right of First Refusal (without giving effect to any shares of Transfer Stock that any such Fully Exercising Stockholder has elected to purchase pursuant to the Undersubscription Notice). If the
options to purchase the remaining shares are exercised in full by the Fully Exercising Stockholders, the Company shall immediately notify all of the Exercising Stockholders and the Prospective Transferor of that fact. 

  
 - 4 - 

 (c) Incomplete Exercise of Rights; No Adverse Effect. Subject to Subsection
2.2, if the total number of shares of Transfer Stock that the Company and the Eligible Stockholders have agreed to purchase in the Exercising Stockholder Notices and Undersubscription Notices is less than the total number of shares of Transfer
Stock, then the Prospective Transferor shall be free to sell all or any portion of the uncommitted balance of such Transfer Stock to the Prospective Transferee on terms and conditions substantially similar to (and in no event more favorable than)
the terms and conditions set forth in the Proposed Transfer Notice, it being understood and agreed that (i) any such sale or transfer shall be subject to the other terms and restrictions of this Agreement, including, without limitation, the
terms and restrictions set forth in Subsections 2.2 and 5.9(b); (ii) any future Proposed Transfer shall remain subject to the terms and conditions of this Agreement, including this Section 2; and
(iii) such sale shall be consummated within ninety (90) days after receipt of the Proposed Transfer Notice by the Company and, if such sale is not consummated within such ninety (90) day period, such sale shall again become subject to
the Right of First Refusal on the terms set forth herein. The exercise or non-exercise of the rights of the Eligible Stockholders hereunder to participate in one or more sales of Transfer Stock made by a
Prospective Transferor shall not adversely affect their rights to participate in subsequent sales of Transfer Stock by a Prospective Transferor. 

(d) Consideration; Closing. If the consideration proposed to be paid for the Transfer Stock is in property, services or other non-cash consideration, the fair market value of the consideration shall be as determined in good faith by the Company’s Board of Directors. If any Exercising Stockholder cannot for any reason pay for the
Transfer Stock in the same form of non-cash consideration, such Exercising Stockholder may pay the cash value equivalent thereof, as determined in good faith by the Board of Directors. The closing of the
purchase of Transfer Stock by Exercising Stockholders shall take place, and all payments from the Exercising Stockholders shall have been delivered to the Prospective Transferor, by the later of (i) the date specified in the Proposed Transfer
Notice as the intended date of the Proposed Transfer and (ii) ninety (90) days after delivery of the Proposed Transfer Notice. 
 2.2.
Right of Co-Sale. 
 (a) Exercise of Right. Following the delivery of a Proposed
Transfer Notice pursuant to Subsection 2.1 above, each Investor not exercising its Right of First Refusal pursuant to Subsection 2.1 above may elect to exercise its Right of Co-Sale and sell the
same proportion of his, her or its shares as being sold by the Prospective Transferor by giving notice to the Company and the Prospective Transferor (the “Co-Sale Notice”), subject to
Subsection 2.2(d) and otherwise on the same terms and conditions specified in the Proposed Transfer Notice. Each Investor who desires to exercise its Right of Co-Sale (each, a “Participating
Investor”) must deliver the Co-Sale Notice within the Offer Period, and upon giving such Co-Sale Notice, such Participating Investor shall be deemed to have
effectively exercised the Right of Co-Sale. 
 (b) Shares Includable. 

(i) Each Participating Investor may include in the Proposed Transfer all or any part of such Participating Investor’s Capital Stock equal
to the same proportion of shares being sold by the Prospective Transferor to the Prospective Transferee (for example, if the Transfer Stock is 20% of the Capital Stock owned by the Prospective Transferor, the Participating Investor may elect to
include in the Proposed Transfer up to 20% of the Capital Stock of the Participating Investor). 

  
 - 5 - 

 (ii) To the extent the Prospective Transferee does not wish to acquire all of the Capital
Stock proposed to be sold by the Prospective Transferor and all Participating Investors, the number of shares of Capital Stock sold by the Prospective Transferor and the Participating Investors shall be cut back on a proportionate basis to the
amount proposed to be sold. The Company shall notify the Prospective Transferor and the Participating Investors of such cut back (the “Cut Back Notice”). Within ten (10) business days of receipt of a Cut Back Notice, a
Participating Investor may elect, by notice in writing to the Company and the Prospective Transferor, to rescind its Co-Sale Notice. If no written response is received by the Company and the Prospective
Transferor within such seven (7) day period, the Participating Investor shall be deemed to have consented to the sale of its shares as specified in the Cut Back Notice. If an Investor rescinds its Co-Sale
Notice, the Investor shall be deemed to automatically have waived his, her or its Right of Co-Sale with respect to the Proposed Transfer. 

(c) Purchase and Sale Agreement. The Participating Investors and the Prospective Transferor agree that the terms and conditions of any
Proposed Transfer in accordance with Subsection 2.2 will be memorialized in, and governed by, a written purchase and sale agreement with the Prospective Transferee (the “Purchase and Sale Agreement”) with customary
terms and provisions for such a transaction, and the Participating Investors and the Prospective Transferor further covenant and agree to enter into such Purchase and Sale Agreement as a condition precedent to any sale or other transfer in
accordance with this Subsection 2.2. 
 (d) Allocation of Consideration. 

(i) Subject to Subsection 2.2(b)(ii), the aggregate consideration payable to the Participating Investors and the Prospective Transferor
shall be allocated based on the number of shares of Capital Stock sold to the Prospective Transferee by each Participating Investor and the Prospective Transferor as provided in Subsection 2.2(b), provided that if a Participating Investor
wishes to sell a different class or series of Capital Stock, the price set forth in the Proposed Transfer Notice shall be appropriately adjusted based on the conversion ratio of the Preferred Stock into Common Stock. 

(ii) In the event that the Proposed Transfer constitutes a Change of Control, the terms of the Purchase and Sale Agreement shall provide that
the aggregate consideration from such transfer shall be allocated to the Participating Investors and the Prospective Transferor in accordance with Subsections 2.1 and 2.2 of Article Fourth, Part B of the Restated Certificate as if
(A) such transfer were a Deemed Liquidation Event (as defined in the Restated Certificate), and (B) the Capital Stock sold in accordance with the Purchase and Sale Agreement were the only Capital Stock outstanding. In the event that a
portion of the aggregate consideration payable to the Participating Investor(s) and Prospective Transferor is placed into escrow, the Purchase and Sale Agreement shall provide that (x) the portion of such consideration that is not placed in
escrow (the “Initial Consideration”) shall be allocated in accordance with Subsections 2.1 and 2.2 of Article Fourth, Part B of the Restated Certificate as if the Initial Consideration were the only
consideration payable in connection with such transfer, and (y) any additional consideration which becomes payable to the Participating Investor(s) and Prospective Transferor upon release from escrow shall be allocated in accordance with
Subsections 2.1 and 2.2 of Article Fourth, Part B of the Restated Certificate after taking into account the previous payment of the Initial Consideration as part of the same transfer. 

(e) Purchase by Prospective Transferor; Deliveries. Notwithstanding anything to the contrary in Subsection 2.2(c) above, if any
Prospective Transferee or Transferees refuse(s) to purchase securities subject to the Right of Co-Sale from any Participating Investor or Investors or upon the failure to negotiate in good faith a Purchase and
Sale Agreement reasonably satisfactory to the Participating Investors, no Prospective Transferor may sell any Transfer Stock to such Prospective 

  
 - 6 - 

 
Transferee or Transferees unless and until, simultaneously with such sale, such Prospective Transferor purchases all securities subject to the Right of
Co-Sale from such Participating Investor or Investors on the same terms and conditions (including the proposed purchase price) as set forth in the Proposed Transfer Notice and as provided in Subsection
2.2(d)(i). In connection with such purchase by the Prospective Transferor, such Participating Investor or Investors shall deliver to the Prospective Transferor a stock certificate or certificates, properly endorsed for transfer, representing the
Capital Stock being purchased by the Prospective Transferor. Each such stock certificate delivered to the Prospective Transferor will be transferred to the Prospective Transferee against payment therefor in consummation of the sale of the Transfer
Stock pursuant to the terms and conditions specified in the Proposed Transfer Notice, and the Prospective Transferor shall concurrently therewith remit or direct payment to each such Participating Investor the portion of the aggregate consideration
to which each such Participating Investor is entitled by reason of its participation in such sale as provided in this Subsection 2.2(e). 

(f) Additional Compliance. If any Proposed Transfer is not consummated within ninety (90) days after receipt of the Proposed
Transfer Notice by the Company, the Key Holders, Investors or Founders, as the case may be, proposing the Proposed Transfer may not sell any Transfer Stock unless they first comply in full with each provision of this
Section 2. The exercise or election not to exercise any right by any Investor hereunder shall not adversely affect its right to participate in any other sales of Transfer Stock subject to this
Subsection 2.2. 
 (g) Liability of Investors. Each Participating Investor shall be liable to the
Prospective Transferee or Transferees only to same extent as the Prospective Transferor with respect to representations and warranties regarding the Company or its business, on a several basis for each such Participating Investor’s pro rata
portion. 
 2.3. Effect of Failure to Comply. 

(a) Transfer Void; Equitable Relief. Any Proposed Transfer not made in compliance with the requirements of this Agreement shall be null
and void ab initio, shall not be recorded on the books of the Company or its transfer agent and shall not be recognized by the Company. Each party hereto acknowledges and agrees that any breach of this Agreement would result in substantial harm to
the other parties hereto for which monetary damages alone could not adequately compensate. Therefore, the parties hereto unconditionally and irrevocably agree that any non-breaching party hereto shall be
entitled to seek protective orders, injunctive relief and other remedies available at law or in equity (including, without limitation, seeking specific performance or the rescission of purchases, sales and other transfers of Transfer Stock not made
in strict compliance with this Agreement). 
 (b) Violation of First Refusal Right. If any Stockholder becomes obligated to sell any
Transfer Stock to any Eligible Stockholder under this Agreement and fails to deliver such Transfer Stock in accordance with the terms of this Agreement, such Eligible Stockholder may, at its option, in addition to all other remedies it may have,
send to such Stockholder the purchase price for such Transfer Stock as is herein specified and transfer to the name of such Eligible Stockholder (or request that the Company effect such transfer in the name of an Eligible Stockholder) on the
Company’s books the certificate or certificates representing the Transfer Stock to be sold. 
 (c) Violation of Co-Sale Right. If any Stockholder purports to sell any Transfer Stock in contravention of the Right of Co-Sale (a “Prohibited Transfer”), each
Investor who desires to exercise its Right of Co-Sale under Subsection 2.2 may, in addition to such remedies as may be available by law, in equity or hereunder, require such Stockholder to purchase from
such Investor the type and number of shares of Capital Stock that such Investor would have been entitled to sell to the Prospective Transferee had the Prohibited Transfer been effected in compliance with the terms of

  
 - 7 - 

 
Subsection 2.2. The sale will be made on the same terms, including, without limitation, as provided in Subsection 2.2(d), as applicable, and subject to the same conditions as would
have applied had the Stockholder not made the Prohibited Transfer, except that the sale (including, without limitation, the delivery of the purchase price) must be made within ninety (90) days after the Investor learns of the Prohibited
Transfer, as opposed to the timeframe proscribed in Subsection 2.2. Such Stockholder shall also reimburse each Investor for any and all reasonable and documented out-of-pocket fees and expenses, including reasonable legal fees and expenses, incurred pursuant to the exercise or the attempted exercise of the Investor’s rights under Subsection 2.2. 

2.4. Regulated Holder. In the event that a Regulated Holder or its BHCA Transferees (each, as defined in the Restated Certificate)
exercises any of its rights of first refusal or co-sale pursuant to this Section 2, if any, the Company, the Key Holders, the Founders and the other Investors will use commercially
reasonable efforts to negotiate in good faith the terms of such transaction, as applicable, including without limitation the terms of any securities of the Company issued pursuant to such transaction and the form of any consideration paid, to comply
with any regulatory requirements applicable to the Regulated Holder or its BHCA Transferees. 
 3. Exempt Transfers. 

3.1. Exempted Transfers. Notwithstanding the foregoing or anything to the contrary herein, the provisions of Subsections 2.1 and
2.2 shall not apply: (a) in the case of a Stockholder that is an entity, upon a transfer by such Stockholder to its stockholders, members, partners, other equity holders or Affiliates (including any affiliated investment fund or
management company), (b) to a repurchase of Transfer Stock from a Key Holder by the Company at a price no greater than that originally paid by such Key Holder for such Transfer Stock and pursuant to an agreement containing vesting and/or repurchase
provisions approved by a majority of the Board of Directors, (c) in the case of a Stockholder that is a natural person, upon a transfer of Transfer Stock by such Stockholder made for bona fide estate planning purposes, either during his or her
lifetime or on death by will or intestacy to his or her spouse, child (natural or adopted), or any other direct lineal descendant of such Stockholder (or his or her spouse) (all of the foregoing collectively referred to as “family
members”) or any custodian or trustee of any trust, partnership or limited liability company for the benefit of, or the ownership interests of which are owned wholly by, such Stockholder or any such family members, (d) a transfer by a
Regulated Holder to a Permitted Regulatory Transferee or BHCA Transferee or pursuant to Article Fourteenth of the Restated Certificate, (e) the repurchase by the Company of shares of Series F Preferred Stock as permitted under the Restated
Certificate or (f) to any other sale approved by the Requisite Investors; provided that in the case of clause(s) (a), (c) or (d), the Stockholder shall deliver prior written notice to the Investors of such pledge, gift or transfer and
such shares of Transfer Stock shall at all times remain subject to the terms and restrictions set forth in this Agreement and such transferee shall, as a condition to such issuance, deliver a counterpart signature page to this Agreement as
confirmation that such transferee shall be bound by all the terms and conditions of this Agreement as a Key Holder, Founder or Investor (as applicable) (but only with respect to the securities so transferred to the transferee), including the
obligations of a Key Holder, Founder or Investor (as applicable) with respect to Proposed Transfers of such Transfer Stock pursuant to Section 2; and provided, further, in the case of any transfer pursuant to
clause (a) above by any Investor other than Goldman, that such transfer is made pursuant to a transaction in which there is no consideration actually paid for such transfer. 

3.2. Exempted Offerings. Notwithstanding the foregoing or anything to the contrary herein, the provisions of
Section 2 shall not apply to the sale of any Transfer Stock (a) to the public in an offering pursuant to an effective registration statement under the Securities Act of 1933, as amended (a “Public
Offering”) or (b) pursuant to a Deemed Liquidation Event (as defined in the Restated Certificate). 

  
 - 8 - 

 3.3. Prohibited Transferees. Notwithstanding the foregoing, no Stockholder shall
transfer any Transfer Stock to (a) any entity which, in the determination of the Company’s Board of Directors, directly or indirectly competes with the Company or (b) any customer, distributor or supplier of the Company, if the
Company’s Board of Directors should determine that such transfer would result in such customer, distributor or supplier receiving information that would place the Company at a competitive disadvantage with respect to such customer, distributor
or supplier; provided, however, that nothing contained in this Section 3.3 shall prohibit any transfer to an entity customer, distributor or supplier of the Company, that is, directly or indirectly, controlled by Telstra
Corporation Limited. 
 4. Legend and Lock-Up. 

4.1. Each certificate representing shares of Transfer Stock held by the Stockholders or issued to any permitted transferee in connection with a
transfer permitted by Subsection 3.1 hereof shall be endorsed with the following legend: 
 THE SALE, PLEDGE,
HYPOTHECATION OR TRANSFER OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE IS SUBJECT TO, AND IN CERTAIN CASES PROHIBITED BY, THE TERMS AND CONDITIONS OF A CERTAIN RIGHT OF FIRST REFUSAL AND CO-SALE AGREEMENT
BY AND AMONG THE STOCKHOLDER, THE CORPORATION AND CERTAIN OTHER HOLDERS OF STOCK OF THE CORPORATION. COPIES OF SUCH AGREEMENT MAY BE OBTAINED UPON WRITTEN REQUEST TO THE SECRETARY OF THE CORPORATION. 

Each Stockholder agrees that the Company may instruct its transfer agent to impose transfer restrictions on the shares represented by certificates bearing the
legend referred to in this Section 4 above to enforce the provisions of this Agreement, and the Company agrees to promptly do so. The legend shall be removed upon termination of this Agreement at the request of the holder.

 4.2. Each Key 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 (l80) 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
applicable FINRA rules, (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 Capital Stock held immediately prior to the effectiveness of the registration for the IPO, 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 the Capital Stock, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Capital Stock of the Company or other securities, in cash or otherwise. The foregoing
provisions of this Subsection 4.2 shall apply only to the IPO, shall not apply to the sale of any shares to an underwriter pursuant to an underwriting agreement, and shall only be applicable to the Key Holders if all officers, directors and
greater than one percent (1%) stockholders of the Company enter into similar agreements. Each Key Holder further agrees to execute such agreements as may be reasonably requested by the underwriters in the IPO that are consistent with this
Subsection 4.2 or that are necessary to give further effect thereto. 

  
 - 9 - 

 5. Miscellaneous. 

5.1. Term. This Agreement shall automatically terminate upon the earlier of (a) immediately prior to the consummation of the IPO
(other than Section 4.2 which shall survive) and (b) the consummation of a Deemed Liquidation Event (as defined in the Restated Certificate). 

5.2. Stock Split. All references to numbers of shares in this Agreement shall be appropriately adjusted to reflect any stock dividend,
split, combination or other recapitalization affecting the Capital Stock occurring after the date of this Agreement. 
 5.3.
Ownership. Each Stockholder represents and warrants that such Stockholder is the sole legal and beneficial owner of the shares of Transfer Stock subject to this Agreement and that no other person or entity has any interest in such shares
(other than a community property interest as to which the holder thereof has acknowledged and agreed in writing to the restrictions and obligations hereunder). 

5.4. Dispute Resolution. Each party will bear its own costs in respect of any disputes arising under this Agreement. 

5.5. Notices. All notices required or permitted hereunder shall be in writing and shall be deemed effectively given:
(a) upon personal delivery to the party to be notified, (b) when sent by confirmed electronic mail or facsimile if sent during normal business hours of the recipient; if not, then on the next business day, (c) five (5) days after
having been sent by registered or certified mail, return receipt requested, postage prepaid, or (d) one (1) day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt.
All communications shall be sent to the party to be notified at the address as set forth on Schedule A, Schedule B or Schedule C hereto, as applicable, or at such other address, facsimile or electronic mail address as such party
may designate by ten (10) days advance written notice to the other parties hereto given in accordance with this Subsection 5.5. If notice is given to the Company, it shall be sent to Four Points Centre, Building II, 11305 Four Points
Drive, Suite 300, Austin, Texas 78726, Attention: General Counsel; and a copy (which shall not constitute notice) shall also be sent to DLA Piper LLP (US), 401 Congress Avenue, Suite 2500, Austin, Texas 78701, Attn: Samer M. Zabaneh. 

5.6. Entire Agreement. This Agreement (including the Exhibits and Schedules hereto) constitutes the full and entire understanding and
agreement between 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 are expressly canceled. 

5.7. 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 non-breaching or non-defaulting party nor shall it be
construed to be a waiver of any such breach or default, or an acquiescence therein, or of or in 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. Any waiver, permit, consent or approval of any kind or character on the part of any party of any breach or default under this Agreement, or any waiver on the part of any party of any provisions or
conditions of this Agreement, must be in writing and shall be effective only to the extent specifically set forth in such writing. All remedies, either under this Agreement or by law or otherwise afforded to any party, shall be cumulative and not
alternative. 

  
 - 10 - 

 5.8. Amendment; Waiver and Termination. This Agreement may be amended, modified or
terminated (other than pursuant to Subsection 5.1 above) and the observance of any term hereof may be waived (either generally or in a particular instance and either retroactively or prospectively) only by a written instrument executed by
(a) the Company and (b) the Requisite Investors (with the Series D-1 Preferred Stock and Series E-1 Preferred Stock not subject to the Regulatory Voting
Restriction (as defined in the Restated Certificate) for this purpose). Any amendment, modification, termination or waiver so effected shall be binding upon the Company, the Investors, the Founders, the Key Holders and all of their respective
successors and permitted assigns whether or not such party, assignee or other shareholder entered into or approved such amendment, modification, termination or waiver. Notwithstanding the foregoing, this Agreement may not be amended, modified or
terminated and the observance of any term hereunder may not be waived with respect to any Investor without the written consent of such Investor unless such amendment, modification, termination or waiver applies to all Investors in the same fashion.
The Company shall give prompt written notice of any amendment, modification or termination hereof or waiver hereunder to any party hereto that did not consent in writing to such amendment, modification, termination or waiver. 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. Notwithstanding the foregoing,
(i) the provisions of Subsections 2.4, 3.3 (with respect to any specific reference to the Series D-1 Preferred Stock, Series E-1 Preferred Stock or
Regulated Holders), 5.8 (with respect to this sentence or any reference to shares of Series D-1 Preferred Stock or Series E-1 Preferred Stock), 5.20 and
any other specific reference in this Agreement to Series D-1 Preferred Stock or Series E-1 Preferred Stock (to the extent applicable to the special rights and terms of
the Series D-1 Preferred Stock or Series E-1 Preferred Stock, as applicable), the treatment thereof, a Regulated Holder or any provision intended to address the
regulatory status of a Regulated Holder, may be amended and the observance of any term thereof may be waived (either generally or in a particular instance and either retroactively or prospectively) only with the written consent of (x) American
Express Travel Related Services Company, Inc. (“AXP”) in order to be enforceable against AXP and its affiliates (as defined in Regulation Y (12 C.F.R. Part 225)) and (y) for so long as any Regulated Holder or its BHCA
Transferee holds any shares of Series D-1 Preferred Stock or Series E-1 Preferred Stock, the holders of a majority of the then-outstanding shares of Series D-1 Preferred Stock and Series E-1 Preferred Stock, voting together, in order to be enforceable against any Regulated Holder or BHCA Transferee, with the Series D-1 Preferred Stock and Series E-1 Preferred Stock treated as not subject to the Regulatory Voting Restriction for this purpose, and (ii) any amendment to Sections
2.2(d), 3.1 or this subpart (ii) of Section 5.8 shall also require the prior written consent of the holders of a majority of the outstanding shares of Series F Preferred Stock in order to be enforceable
against the holders of Series F Preferred Stock and any amendment to, or waiver of, any specific reference to Goldman shall also require the prior written consent of Goldman to be enforceable against Goldman. 

5.9. Assignment of Rights. 

(a) The terms and conditions of this Agreement shall inure to the benefit of and be binding upon the respective successors and permitted
assigns 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 assigns any rights, remedies, obligations, or liabilities
under or by reason of this Agreement, except as expressly provided in this Agreement. 
 (b) Any successor or permitted assignee of any
Stockholder, including any Prospective Transferee who purchases shares of Transfer Stock in accordance with the terms hereof, shall deliver to the Company and the Investors, as a condition to any transfer or assignment, a counterpart signature page
hereto pursuant to which such successor or permitted assignee shall confirm their agreement to be subject to and bound by all of the provisions set forth in this Agreement that were applicable to the predecessor or assignor of such successor or
permitted assignee. 

  
 - 11 - 

 (c) Except in connection with an assignment by the Company by operation of law to the
acquirer of the Company, the rights and obligations of the Company hereunder may not be assigned under any circumstances. 
 5.10.
Severability. The invalidity or unenforceability of any provision hereof shall in no way affect the validity or enforceability of any other provision. 

5.11. 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. 
 5.12. Governing Law. This Agreement shall be governed by the internal
law of the State of Delaware. 
 5.13. Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience
only and are not to be considered in construing or interpreting this Agreement. 
 5.14. 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 one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including pdf) 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. 

5.15. Aggregation of Stock. All shares of Capital Stock held or acquired by Affiliated entities or persons 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. 

5.16. Specific Performance. In addition to any and all other remedies that may be available at law in the event of any breach of this
Agreement, each Eligible Stockholder shall be entitled to specific performance of the agreements and obligations of the Company and the Stockholders hereunder and to such other injunction or other equitable relief as may be granted by a court of
competent jurisdiction. 
 5.17. Additional Key Holders. In the event that after the date of this Agreement, the Company issues shares
of Common Stock, or options to purchase Common Stock, to any employee or consultant, which shares or options would collectively constitute with respect to such employee or consultant (taking into account all shares of Common Stock, options and other
purchase rights held by such employee or consultant) one percent (1%) or more of the Company’s then outstanding Common Stock (treating for this purpose all shares of Common Stock issuable upon exercise of or conversion of outstanding options,
warrants or convertible securities, as if exercised or converted), the Company shall, as a condition to such issuance, cause such employee or consultant to execute a counterpart signature page hereto as a Key Holder, and such person shall thereby be
bound by, and subject to, all the terms and provisions of this Agreement applicable to a Key Holder. 

  
 - 12 - 

 5.18. Consent of Spouse. If any Stockholder is married on the date of this
Agreement, such Stockholder’s spouse shall execute and deliver to the Company a consent of spouse in the form of Exhibit A hereto (“Consent of Spouse”), effective on the date hereof. Notwithstanding the execution
and delivery thereof, such consent shall not be deemed to confer or convey to the spouse any rights in such Stockholder’s shares of Transfer Stock that do not otherwise exist by operation of law or the agreement of the parties. If any
Stockholder should marry or remarry subsequent to the date of this Agreement, such Stockholder shall within thirty (30) days thereafter obtain his/her new spouse’s acknowledgement of and consent to the existence and binding effect of all
restrictions contained in this Agreement by causing such spouse to execute and deliver a Consent of Spouse acknowledging the restrictions and obligations contained in this Agreement and agreeing and consenting to the same. 

5.19. Effect on Prior Agreement. Upon the execution and delivery of this Agreement by (a) the Company, (b) the Key Holders and
Founders holding a majority of the shares of Transfer Stock held by all of the Key Holders and Founders who are providing services to the Company as officers, employees or consultants as of the date of this Agreement and (c) the Requisite
Investors (as defined in the Prior Agreement and measured before giving effect to any purchase of shares of Series E Preferred Stock or Series E-1 Preferred Stock by such Investors), the Prior Agreement
automatically shall terminate and be of no further force and effect and shall be amended and restated in its entirety as set forth in this Agreement. 

5.20. Treatment of Series D-1 Preferred Stock and Series E-1
Preferred Stock. Unless otherwise set forth in this Agreement, for all purposes of this Agreement, the Series D-1 Preferred Stock and Series E-1 Preferred Stock
shall be treated as being convertible (without actual conversion) into shares of Common Stock at the then-applicable conversion price of the Series D-1 Preferred Stock or Series
E-1 Preferred Stock, as applicable, as set forth in the Restated Certificate. 
 [Remainder of
page intentionally left blank] 

  
 - 13 - 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	COMPANY:
	
	BIGCOMMERCE HOLDINGS, INC.
		
	By:	 	 /s/ Robert Alvarez

	Name:	 	Robert Alvarez
	Title:	 	Chief Financial Officer

 Signature Page to 

Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	KEY HOLDERS:
		
	Signature:	 	 /s/ Brent Bellm

	Name:	 	Brent Bellm
		
	Signature:	 	 /s/ Robert Alvarez

	Name:	 	Robert Alvarez
		
	Signature:	 	 /s/ Russell Klein

	Name:	 	Russell Klein

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	FOUNDERS:
		
	Signature:	 	 /s/ Wadih Phillipe Machaalani

	Name:	 	Wadih Phillipe Machaalani
		
	Signature:	 	 /s/ Mitchell Harper

	Name:	 	Mitchell Harper

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

																	
	 INVESTORS:
  

GENERAL CATALYST GROUP V, L.P. 
	  	GC ENTREPRENEURS FUND V, L.P. 
				
	By:	 	 General Catalyst Partners V, L.P.

Its General Partner
	  	By:	  	 General Catalyst Partners V, L.P.

Its General Partner

							
		 	By:	 	 General Catalyst GP V, LLC
 Its
General Partner
	  		  		  	By:	  	 General Catalyst GP V, LLC
 Its
General Partner

									
		 		 	By:	 	 /s/ Chris McCain
	  		  		  		  	By:	  	 /s/ Chris McCain

		 		 		 	Name: Chris McCain	  		  		  		  		  	Name: Chris McCain
		 		 		 	Title: Chief Legal Officer	  		  		  		  		  	Title: Chief Legal Officer
			
	GENERAL CATALYST GROUP IV, L.P. 	  	            	  	GC ENTREPRENEURS FUND IV, L.P. 
				
	By:	 	 General Catalyst Partners IV, L.P.

Its General Partner
	  	By:	  	 General Catalyst Partners IV, L.P.

Its General Partner

							
		 	By:	 	 General Catalyst GP IV, LLC
 Its
General Partner
	  		  		  	By:	  	 General Catalyst GP IV, LLC
 Its
General Partner

									
		 		 	By:	 	 /s/ Chris McCain
	  		  		  		  	By:	  	 /s/ Chris McCain

		 		 		 	Name: Chris McCain	  		  		  		  		  	Name: Chris McCain
		 		 		 	Title: Chief Legal Officer	  		  		  		  		  	Title: Chief Legal Officer
					
	GENERAL CATALYST GROUP V SUPPLEMENTAL, L.P.	  		  		  		  	
						
	By:	 	 General Catalyst Partners V, L.P.

its General Partner
	  		  		  		  	
								
		 	By:	 	 General Catalyst GP V, LLC
 its
General Partner
	  		  		  		  		  	
									
		 		 	By:	 	 /s/ Chris McCain
	  		  		  		  		  	
		 		 		 	Name: Chris McCain	  		  		  		  		  	
		 		 		 	Title: Chief Legal Officer	  		  		  		  		  	

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	REVOLUTION GROWTH II, LP
		
	By:	 	Revolution Growth GP II, LP
		 	its General Partner
		
	By:	 	Revolution Growth UGP II, LLC
		 	its General Partner
		
	By:	 	 /s/ Steven J. Murray

	Name:	 	Steven J. Murray
	Title:	 	Operating Manager

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	GGV CAPITAL V L.P.
		
	By:	 	GGV Capital V L.L.C., its General Partner
		
	By:	 	 /s/ Jeff Richards

	Name:	 	Jeff Richards
	Title:	 	Managing Director
	
	GGV CAPITAL V ENTREPRENEURS FUND L.P.
		
	By:	 	GGV Capital V L.L.C., its General Partner
		
	By:	 	 /s/ Jeff Richards

	Name:	 	Jeff Richards
	Title:	 	Managing Director

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	SOFTBANK PRINCEVILLE INVESTMENTS LP
		
	By:	 	SB PV GP LP, its General Partner
		
	By:	 	SB PV GP LLC, its General Partner
		
	By:	 	 /s/ Steven J. Murray

	Name:	 	Steven J. Murray
	Title:	 	Managing Member

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	AMERICAN EXPRESS TRAVEL RELATED SERVICES COMPANY, INC.
		
	By:	 	 /s/ Lisa Marchese

	Name:	 	Lisa Marchese
	Title:	 	EVP– Head of Strategy and M&A

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	TENAYA CAPITAL VI, LP
		
	By:	 	Tenaya Capital VI GP, LLC,
		 	its General Partner
		
	By:	 	 /s/ Thomas Muscarella

	Name:	 	Thomas Muscarella
	Title:	 	Attorney-In-Fact

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	FLOODGATE FUND III, L.P. 
	on behalf of itself and as nominee for certain other individuals and entities
		
	By:	 	Floodgate Partners III, L.L.C.
		 	Its general partner
		
	By:	 	 /s/ Michael J. Maples Jr.

	Name:	 	Michael J. Maples Jr.
	Title:	 	Managing Member

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	THE WASHINGTON UNIVERSITY 
		
	By:	 	 /s/ Scott L. Wilson

	Name:	 	Scott L. Wilson
	Title:	 	Chief Investment Officer

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	eT Capital, L.P.
		
	By:	 	 /s/ Li-Chen Lin

	Name:	 	Li-Chen Lin
	Title:	 	Authorized Signatory

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 IN WITNESS WHEREOF, the parties have executed this Fourth Amended and Restated Right of
First Refusal and Co-Sale Agreement as of the date first written above. 
  

			
	GOLDMAN SACHS & CO. LLC
		
	By:	 	 /s/ Hillel Moerman

	Name:	 	Hillel Moerman
	Title:	 	Managing Director

  
 Signature Page to

 Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement 

 SCHEDULE A 

INVESTORS 
  

	
	 GENERAL CATALYST GROUP V, L.P. (1) 
20 University Road, Suite 450

Cambridge, MA 02138
 Attn: Chris McCain

	
	 GC ENTREPRENEURS FUND V, L.P. (1) 
20 University Road, Suite 450

Cambridge, MA 02138
 Attn: Chris McCain

	
	 GENERAL CATALYST GROUP IV, L.P. (1) 
20 University Road, Suite 450

Cambridge, MA 02138
 Attn: Chris McCain

	
	 GC ENTREPRENEURS FUND IV, L.P. (1) 
20 University Road, Suite 450

Cambridge, MA 02138
 Attn: Chris McCain

	
	 GENERAL CATALYST GROUP V SUPPLEMENTAL, L.P. (1)

20 University Road, Suite 450
 Cambridge, MA 02138

Attn: Chris McCain

	
	 Stephan Schambach
 Ricarda-Huch-Weg 16 
07743 Jena, Germany

	
	 FLOODGATE FUND III, L.P.

820 Ramona Street, Suite 200 
Palo Alto, CA 94301

	
	 REVOLUTION GROWTH II, LP (2)

1717 Rhode Island Avenue, N.W.
 Washington, DC 20036

	
	 SOFTBANK PRINCEVILLE INVESTMENTS, L.P. (3)

38 Glen Avenue 
Newton, MA 02459

	
	 TELSTRA VENTURES PTY LIMITED(4)

575 Market Street, Suite 1650
 San Francisco, CA 94105

 
 COPY TO: TELSTRA
CORPORATION LIMITED LEVEL 41 
242 Exhibition Street 
Melbourne, Victoria, 3000 Australia

	
	 AMERICAN EXPRESS TRAVEL RELATED SERVICES
COMPANY, INC.
 200 Vesey Street

Mail Drop 51-03
 New York,
NY 10285
 Attn: General Counsel / Chief Development Officer

	
	 MILLENNIUM TECHNOLOGY VALUE PARTNERS II, LP

32 Avenue of the Americas
 17th Floor

New York, NY 10013

	
	 MILLENNIUM TECHNOLOGY VALUE PARTNERS
II-A, LP
 32 Avenue of the Americas

17th Floor
 New York, NY 10013

	
	 TENAYA CAPITAL VI, LP

3280 Alpine Road
 Portola Valley, CA 94028

	
	 SPLIT ROCK PARTNERS II, LP 
10400 Viking Drive, Suite 250

Eden Prairie, MN 55344

	
	 GGV CAPITAL V L.P.
 3000
Sand Hill Road
 Building 4, Suite 230
 Menlo Park, CA 94025

Attention: Jeff Richards

	
	 GGV CAPITAL V ENTREPRENEURS FUND L.P.

3000 Sand Hill Road
 Building 4, Suite 230

Menlo Park, CA 94025
 Attention: Jeff Richards

	
	 THE WASHINGTON UNIVERSITY

11 North Jackson, Campus Box 1047
 St. Louis, MO 63105

Attention: Daniel Feder

	
	ET CAPITAL, L.P.
	
	KAL RAMAN
	
	SVIC NO. 32 NEW TECHNOLOGY BUSINESS INVESTMENT L.L.P.
	
	 GOLDMAN SACHS & CO. LLC

200 West Street
 New York, New York 10282

Attention: Hristo D. Dimitrov, VP & Associate General Counsel

 (1) With a copy (which shall not constitute notice) to: 

Cooley LLP 
 500 Boylston Street 

Boston, MA 02116 
 Attn: Patrick Mitchell 

(2) With a copy (which shall not constitute notice) to: 

Cooley LLP 
 One Freedom Square 

Reston Town Center 
 11951 Freedom Drive 

Reston, VA 20190 
 Attn: Geoff Willard/Brian Burke 

(3) With a copy (which shall not constitute notice) to: 

Wilmer Cutler Pickering Hale and Dorr LLP 
 60 State
Street 
 Boston, MA 02109 
 Attn: Edwin C. Pease 

(4) With a copy (which shall not constitute notice) to: 

Weil, Gotshal & Manges LLP 
 201 Redwood Shores
Parkway 
 Redwood Shores, CA 94065 
 Attn: Eric Schwartzman

 5) With a copy (which shall not constitute notice) to: 

Lowenstein Sandler LLP 
 1251 Avenue of the Americas 

New York, New York 10020 
 Attn: Edward M. Zimmerman 

 SCHEDULE B 

FOUNDERS 
  

	
	WADIH PHILLIPE MACHAALANI 
	
	MITCHELL HARPER 

 SCHEDULE C 

KEY HOLDERS 
  

	
	 BRENT BELLM

11305 Four Points Drive

Building II, Third Floor

Austin, TX 78726

	
	 ROBERT ALVAREZ

11305 Four Points Drive

Building II, Third Floor

Austin, TX 78726

	
	 RUSSELL KLEIN

11305 Four Points Drive

Building II, Third Floor

Austin, TX 78726

 EXHIBIT A 

CONSENT OF SPOUSE 
 I,
                                , spouse of
                    , acknowledge that I have read the Fourth Amended and Restated Right of First Refusal and
Co-Sale Agreement, dated as of April 19, 2018, to which this Consent is attached as Exhibit A (the “Agreement”), and that I know the contents of the Agreement. I am aware
that the Agreement contains provisions regarding certain rights to certain other holders of Capital Stock of the Company upon a Proposed Transfer of shares of Transfer Stock of the Company which my spouse may own including any interest I might have
therein. 
 I hereby agree that my interest, if any, in any shares of Transfer Stock of the Company subject to the Agreement shall be
irrevocably bound by the Agreement and further understand and agree that any community property interest I may have in such shares of Transfer Stock of the Company shall be similarly bound by the Agreement. 

I am aware that the legal, financial and related matters contained in the Agreement are complex and that I am free to seek independent
professional guidance or counsel with respect to this Consent. I have either sought such guidance or counsel or determined after reviewing the Agreement carefully that I will waive such right. 

 

							
	Dated as of the          day of                     ,
        .	 		 		 	
				
		 		 		 	  
 Signature

				
		 		 		 	  
 Print Name

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