EX-10.4

1. PURPOSE. The purpose of this Plan is to provide incentives to attract, retain and motivate eligible persons whose present and potential contributions are important to the success of the Company, its Parent and Subsidiaries, by offering them an opportunity to participate in the Company’s future performance through awards of Options, Restricted Stock and Restricted Stock Units. Capitalized terms not defined in the text are defined in Section 23 hereof. Although this Plan is intended to be a written compensatory benefit plan within the meaning of Rule 701 promulgated under the Securities Act, grants may be made pursuant to this Plan which do not qualify for exemption under Rule 701 or Section 25102(o) of the California Corporations Code. Any requirement of this Plan which is required in law only because of Section 25102(o) need not apply if the Committee so provides.

2.1 Number of Shares Available. Subject to Sections 2.2 and 18 hereof, the total number of Shares reserved and available for grant and issuance pursuant to this Plan will be 179,398,574 (as adjusted to reflect the two-for-one stock split effective as of May 3, 2011). Shares subject to Awards that at any time are cancelled, forfeited, settled in cash or that expire by their terms will again be available for grant and issuance in connection with other Awards. At all times the Company will reserve and keep available a sufficient number of Shares as will be required to satisfy the requirements of all Awards granted and outstanding under this Plan. In no event shall the total number of Shares issued (counting each reissuance of a Share that was previously issued and then forfeited or repurchased by the Company as a separate issuance) under the Plan upon exercise of ISOs exceed 450,000,000 Shares (adjusted in proportion to any adjustments under Section 2.2 hereof) over the term of the Plan.

2.2 Adjustment of Shares. In the event that the number of outstanding shares of the Company’s Common Stock is changed by a stock dividend, recapitalization, stock split, reverse stock split, subdivision, combination, reclassification or similar change in the capital structure of the Company without consideration, then (i) the number of Shares reserved for issuance under this Plan, (ii) the Exercise Prices of and number of Shares subject to outstanding Options and (iii) the Purchase Prices of and number of Shares subject to other outstanding Awards will be proportionately adjusted, subject to any required action by the Board or the stockholders of the Company and compliance with applicable securities laws; provided, however, that fractions of a Share will not be issued but will either be paid in cash at the Fair Market Value of such fraction of a Share or will be rounded down to the nearest whole Share, as determined by the Committee; and provided, further, that the Exercise Price of any Option may not be decreased to below the par value of the Shares.

3. ELIGIBILITY. ISOs (as defined in Section 5 hereof) may be granted only to employees (including officers and directors who are also employees) of the Company or of a Parent or Subsidiary of the Company. NQSOs (as defined in Section 5 hereof) and Restricted Stock Awards may be granted to employees, officers, directors and consultants of the Company or any Parent or Subsidiary of the Company; provided such consultants render bona fide services not in connection with the offer and sale of securities in a capital-raising transaction. A person may be granted more than one Award under this Plan.

4.1 Committee Authority. This Plan will be administered by the Committee or the Board if no Committee is created by the Board. Subject to the general purposes, terms and conditions of this Plan, and to the direction of the Board, the Committee will have full power to implement and carry out this Plan. Without limitation, the Committee will have the authority to:

(a) construe and interpret this Plan, any Award Agreement and any other agreement or document executed pursuant to this Plan;

(f) determine whether Awards will be granted singly, in combination with, in tandem with, in replacement of, or as alternatives to, other Awards under this Plan or awards under any other incentive or compensation plan of the Company or any Parent or Subsidiary of the Company;

(i) correct any defect, supply any omission, or reconcile any inconsistency in this Plan, any Award, any Award Agreement, any Exercise Agreement or any Restricted Stock Purchase Agreement;

(k) make all other determinations necessary or advisable for the administration of this Plan; and

4.2 Committee Discretion. Unless in contravention of any express terms of this Plan or Award, any determination made by the Committee with respect to any Award will be made in its sole discretion either (i) at the time of grant of the Award, or (ii) subject to Section 5.9 hereof, at any later time. Any such determination will be final and binding on the Company and on all persons having an interest in any Award under this Plan.

5. OPTIONS. The Committee may grant Options to eligible persons described in Section 3 hereof and will determine whether such Options will be Incentive Stock Options within the meaning of the Code (“ISOs”) or Nonqualified Stock Options (“NQSOs”), the number of Shares subject to the Option, the Exercise Price of the Option, the period during which the Option may be exercised, and all other terms and conditions of the Option, subject to the following:

5.1 Form of Option Grant. Each Option granted under this Plan will be evidenced by an Award Agreement which will expressly identify the Option as an ISO or an NQSO (“Stock Option Agreement”), and will be in such form and contain such provisions (which need not be the same for each Participant) as the Committee may from time to time approve, and which will comply with and be subject to the terms and conditions of this Plan.

5.2 Date of Grant. The date of grant of an Option will be the date on which the Committee makes the determination to grant such Option, unless a later date is otherwise specified by the Committee. The Stock Option Agreement and a copy of this Plan will be delivered to the Participant within a reasonable time after the granting of the Option.

5.3 Exercise Period. Options may be exercisable immediately but subject to repurchase pursuant to Section 12 hereof or may be exercisable within the times or upon the events determined by the Committee as set forth in the Stock Option Agreement governing such Option; provided, however, that no Option will be exercisable after the expiration of ten (10) years from the date the Option is granted; and provided further that no ISO granted to a person who directly or by attribution owns more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or of any Parent or Subsidiary of the Company (“Ten Percent Shareholder”) will be exercisable after the expiration of five (5) years from the date the ISO is granted. The Committee also may provide for Options to become exercisable at one time or from time to time, periodically or otherwise, in such number of Shares or percentage of Shares as the Committee determines.

5.4 Exercise Price. The Exercise Price of an Option will be determined by the Committee when the Option is granted and may not be less than eighty-five percent (85%) of the Fair Market Value of the Shares on the date of grant; provided that (i) the Exercise Price of an ISO will not be less than one hundred percent (100%) of the Fair Market Value of the Shares on the date of grant and (ii) the Exercise Price of an ISO granted to a Ten Percent Shareholder will not be less than one hundred ten percent (110%) of the Fair Market Value of the Shares on the date of grant. Payment for the Shares purchased must be made in accordance with Section 8 hereof.

5.5 Method of Exercise. Options may be exercised only by delivery to the Company of a written stock option exercise agreement (the “Exercise Agreement”) in a form approved by the Committee (which need not be the same for each Participant). The Exercise Agreement will state (i) the number of Shares being purchased, (ii) the restrictions imposed on the Shares purchased under such Exercise Agreement, if any, and (iii) such representations and agreements regarding Participant’s investment intent and access to information and other matters, if any, as may be required or desirable by the Company to comply with applicable securities laws. Participant shall execute and deliver to the Company the Exercise Agreement together with payment in full of the Exercise Price, and any applicable taxes, for the number of Shares being purchased. An option may not be exercised for a fraction of a share.

5.6 Termination. Subject to earlier termination pursuant to Sections 18 and 19 hereof and notwithstanding the exercise periods set forth in the Stock Option Agreement, exercise of an Option will always be subject to the following:

(a) If the Participant is Terminated for any reason other than death, Disability or for Cause, then the Participant may exercise such Participant’s Options only to the extent that such Options are exercisable as to Vested Shares upon the Termination Date or as otherwise determined by the Committee. Such Options must be exercised by the Participant, if at all, as to all or some of the Vested Shares calculated as of the Termination Date or such other date determined by the Committee, within three (3) months after the Termination Date (or within such shorter time period, not less than thirty (30) days, or within such longer time period after the Termination Date as may be determined by the Committee, with any exercise beyond three (3) months after the Termination Date deemed to be an NQSO) but in any event, no later than the expiration date of the Options.

(b) If the Participant is Terminated because of Participant’s death or Disability (or the Participant dies within three (3) months after a Termination other than for Cause), then Participant’s Options may be exercised only to the extent that such Options are exercisable as to Vested Shares by Participant on the Termination Date or as otherwise determined by the Committee. Such options must be exercised by Participant (or Participant’s legal representative or authorized assignee), if at all, as to all or some of the Vested Shares calculated as of the Termination Date or such other date determined by the Committee, within twelve (12) months after the Termination Date (or within such shorter time period, not less than six (6) months, or within such longer time period after the Termination Date as may be determined by the Committee, with any exercise beyond (i) three (3) months after the Termination Date when the Termination is for any reason other than the Participant’s death or disability, within the meaning of Section 22(e)(3) of the Code, or (ii) twelve (12) months after the Termination Date when the Termination is for Participant’s disability, within the meaning of Section 22(e)(3) of the Code, deemed to be an NQSO) but in any event no later than the expiration date of the Options.

(c) If the Participant is terminated for Cause, the Participant may exercise such Participant’s Options, but not to an extent greater than such Options are exercisable as to

Vested Shares upon the Termination Date and Participant’s Options shall expire on such Participant’s Termination Date, or at such later time and on such conditions as are determined by the Committee.

5.7 Limitations on Exercise. The Committee may specify a reasonable minimum number of Shares that may be purchased on any exercise of an Option, provided that such minimum number will not prevent Participant from exercising the Option for the full number of Shares for which it is then exercisable.

5.8 Limitations on ISOs. The aggregate Fair Market Value (determined as of the date of grant) of Shares with respect to which ISOs are exercisable for the first time by a Participant during any calendar year (under this Plan or under any other incentive stock option plan of the Company or any Parent or Subsidiary of the Company) will not exceed One Hundred Thousand Dollars ($100,000). If the Fair Market Value of Shares on the date of grant with respect to which ISOs are exercisable for the first time by a Participant during any calendar year exceeds One Hundred Thousand Dollars ($100,000), then the Options for the first One Hundred Thousand Dollars ($100,000) worth of Shares to become exercisable in such calendar year will be ISOs and the Options for the amount in excess of One Hundred Thousand Dollars ($100,000) that become exercisable in that calendar year will be NQSOs. In the event that the Code or the regulations promulgated thereunder are amended after the Effective Date (as defined in Section 19 hereof) to provide for a different limit on the Fair Market Value of Shares permitted to be subject to ISOs, then such different limit will be automatically incorporated herein and will apply to any Options granted after the effective date of such amendment.

5.9 Modification, Extension or Renewal. The Committee may modify, extend or renew outstanding Options and authorize the grant of new Options in substitution therefor, provided that any such action may not, without the written consent of a Participant, impair any of such Participant’s rights under any Option previously granted. Any outstanding ISO that is modified, extended, renewed or otherwise altered will be treated in accordance with Section 424(h) of the Code. Subject to Section 5.10 hereof, the Committee may reduce the Exercise Price of outstanding Options without the consent of Participants by a written notice to them; provided, however, that the Exercise Price may not be reduced below the minimum Exercise Price that would be permitted under Section 5.4 hereof for Options granted on the date the action is taken to reduce the Exercise Price.

5.10 No Disqualification. Notwithstanding any other provision in this Plan, no term of this Plan relating to ISOs will be interpreted, amended or altered, nor will any discretion or authority granted under this Plan be exercised, so as to disqualify this Plan under Section 422 of the Code or, without the consent of the Participant, to disqualify any Participant’s ISO under Section 422 of the Code. In no event shall the total number of Shares issued (counting each reissuance of a Share that was previously issued and then forfeited or repurchased by the Company as a separate issuance) under the Plan upon exercise of ISOs exceed 25,000,000. Shares (adjusted in proportion to any adjustments under Section 2.2 hereof) over the term of the Plan.

5.11 Information to Optionees. If the Company is relying on the exemption from registration under Section 12(g) of the Exchange Act pursuant to the Rule 12h-1(f)(1) promulgated under the Exchange Act, then the Company shall provide the Required Information (as defined

below) in the manner required by Rule 12h-1(f)(1) to all optionees every six months until the Company becomes subject to the reporting requirements of Section 13 or 15(d) of the Exchange Act or is no longer relying on the exemption pursuant to Rule 12h-1(f)(1); provided, that, prior to receiving access to the Required Information the optionee must agree to keep the Required Information confidential pursuant to a written agreement in the form provided by the Company. For purposes of this Section 4.11, “Required Information” means the information described in Rules 701(e)(3), (4) and (5) under the Securities Act, with the financial statements being as of a date not more than 180 days before the sale of securities to which it relates.

6. RESTRICTED STOCK. A Restricted Stock Award is an offer by the Company to sell to an eligible person Shares that are subject to certain specified restrictions. The Committee will determine to whom an offer will be made, the number of Shares the person may purchase, the Purchase Price, the restrictions to which the Shares will be subject, and all other terms and conditions of the Restricted Stock Award, subject to the following:

6.1 Form of Restricted Stock Award. All purchases under a Restricted Stock Award made pursuant to this Plan will be evidenced by an Award Agreement (“Restricted Stock Purchase Agreement”) that will be in such form (which need not be the same for each Participant) as the Committee will from time to time approve, and will comply with and be subject to the terms and conditions of this Plan. The Restricted Stock Award will be accepted by the Participant’s execution and delivery of the Restricted Stock Purchase Agreement and full payment for the Shares to the Company within thirty (30) days from the date the Restricted Stock Purchase Agreement is delivered to the person. If such person does not execute and deliver the Restricted Stock Purchase Agreement along with full payment for the Shares to the Company within such thirty (30) days, then the offer will terminate, unless otherwise determined by the Committee.

6.2 Purchase Price. The Purchase Price of Shares sold pursuant to a Restricted Stock Award will be determined by the Committee. Payment of the Purchase Price must be made in accordance with Section 8 hereof.

6.3 Restrictions. Restricted Stock Awards may be subject to the restrictions set forth in Section 12 hereof or such other restrictions not inconsistent with Section 25102(o) of the California Corporations Code.

7.1 Awards of Restricted Stock Units. A Restricted Stock Unit (“RSU”) is an Award covering a number of Shares that may be settled in cash, or by issuance of those Shares at a date in the future. No Purchase Price shall apply to an RSU settled in Shares. All grants of Restricted Stock Units will be evidenced by an Award Agreement that will be in such form (which need not be the same for each Participant) as the Committee will from time to time approve, and will comply with and be subject to the terms and conditions of this Plan.

7.2 Form and Timing of Settlement. To the extent permissible under applicable law, the Committee may permit a Participant to defer payment under a RSU to a date or dates after the RSU is earned, provided that the terms of the RSU and any deferral satisfy the requirements of

Section 409A of the Code (or any successor) and any regulations or rulings promulgated thereunder. Payment may be made in the form of cash or whole Shares or a combination thereof, all as the Committee determines.

7.3 Restrictions. RSU Awards may be subject to the restrictions set forth in Section 12 hereof or such other restrictions not inconsistent with Section 25102(o) of the California Corporations Code.

8.1 Payment. Payment for Shares purchased pursuant to this Plan may be made in cash (by check) or, where expressly approved for the Participant by the Committee and where permitted by law:

(b) by surrender of shares that: (i) either (A) have been owned by Participant for more than six (6) months and have been paid for within the meaning of SEC Rule 144 (and, if such shares were purchased from the Company by use of a promissory note, such note has been fully paid with respect to such shares) or (B) were obtained by Participant in the public market and (ii) are clear of all liens, claims, encumbrances or security interests;

(c) by tender of a promissory note having such terms as may be approved by the Committee and bearing interest at a rate sufficient to avoid (i) imputation of income under Sections 483 and 1274 of the Code and (ii) variable accounting treatment under Financial Accounting Standards Board Interpretation No. 44 to APB No. 25; provided, however, that Participants who are not employees or directors of the Company will not be entitled to purchase Shares with a promissory note unless the note is adequately secured by collateral other than the Shares; provided, further, that the portion of the Exercise Price or Purchase Price, as the case may be, equal to the par value of the Shares must be paid in cash or other legal consideration permitted by Delaware General Corporation Law;

(d) by waiver of compensation due or accrued to the Participant from the Company for services rendered;

(e) with respect only to purchases upon exercise of an Option, and provided that a public market for the Company’s stock exists:

(i) through a “same day sale” commitment from the Participant and a broker-dealer that is a member of the National Association of Securities Dealers (an “NASD Dealer”) whereby the Participant irrevocably elects to exercise the Option and to sell a portion of the Shares so purchased sufficient to pay the total Exercise Price, and whereby the NASD Dealer irrevocably commits upon receipt of such Shares to forward the total Exercise Price directly to the Company; or

(ii) through a “margin” commitment from the Participant and an NASD Dealer whereby the Participant irrevocably elects to exercise the Option and to pledge the Shares so purchased to the NASD Dealer in a margin account as security for a loan from the NASD Dealer in the amount of the total Exercise Price, and whereby the NASD Dealer irrevocably commits upon receipt of such Shares to forward the total Exercise Price directly to the Company; or

8.2 Loan Guarantees. The Committee may, in its sole discretion, elect to assist the Participant in paying for Shares purchased under this Plan by authorizing a guarantee by the Company of a third-party loan to the Participant.

9.1 Withholding Generally. Whenever Shares are to be issued in satisfaction of Awards granted under this Plan, the Company may require the Participant to remit to the Company an amount sufficient to satisfy federal, state and local withholding tax requirements prior to the delivery of any certificate or certificates for such Shares. Whenever, under this Plan, payments in satisfaction of Awards are to be made in cash by the Company, such payment will be net of an amount sufficient to satisfy federal, state, and local withholding tax requirements.

9.2 Stock Withholding. When, under applicable tax laws, a Participant incurs tax liability in connection with the exercise or vesting of any Award that is subject to tax withholding and the Participant is obligated to pay the Company the amount required to be withheld, the Committee may in its sole discretion allow the Participant to satisfy the minimum withholding tax obligation by electing to have the Company withhold from the Shares to be issued that minimum number of Shares having a Fair Market Value equal to the minimum amount required to be withheld, determined on the date that the amount of tax to be withheld is to be determined. All elections by a Participant to have Shares withheld for this purpose will be made in accordance with the requirements established by the Committee for such elections and be in writing in a form acceptable to the Committee.

10.1 Voting and Dividends. No Participant will have any of the rights of a stockholder with respect to any Shares until the Shares are issued to the Participant. After Shares are issued to the Participant, the Participant will be a stockholder and have all the rights of a stockholder with respect to such Shares, including the right to vote and receive all dividends or other distributions made or paid with respect to such Shares; provided, that if such Shares are Restricted Stock, then any new, additional or different securities the Participant may become entitled to receive with respect to such Shares by virtue of a stock dividend, stock split or any other change in the corporate or capital structure of the Company will be subject to the same restrictions as the Restricted Stock. The Participant will have no right to retain such stock dividends or stock distributions with respect to Unvested Shares that are repurchased pursuant to Section 12 hereof. To the extent required, the Company will comply with Section 260.140.1 of Title 10 of the California Code of Regulations with respect to the voting rights of Common Stock.

10.2 Financial Statements. The Company will provide financial statements to each Participant annually during the period such Participant has Awards outstanding, or as otherwise required under Section 260.140.46 of Title 10 of the California Code of Regulations. Notwithstanding the foregoing, the Company will not be required to provide such financial statements to Participants when issuance of Awards is limited to key employees whose services in connection with the Company assure them access to equivalent information.

11. TRANSFERABILITY. Except as permitted by the Committee, Awards granted under this Plan, and any interest therein, will not be transferable or assignable by Participant, other than by will or by the laws of descent and distribution, and, with respect to NQSOs, by instrument to an inter vivos or testamentary trust in which the options are to be passed to beneficiaries upon the death of the trustor (settlor), or by gift to “immediate family” as that term is defined in 17 C.F.R. 240.16a-1(e), and may not be made subject to execution, attachment or similar process. During the lifetime of the Participant an Award will be exercisable only by the Participant or Participant’s legal representative and any elections with respect to an Award may be made only by the Participant or Participant’s legal representative. For the avoidance of doubt, the prohibition against assignment and transfer applies to an Option and, prior to exercise, the shares to be issued on exercise of an Option, and pursuant to the foregoing sentence shall be understood to include, without limitation, a prohibition against any pledge, hypothecation, or other transfer, including any short position, any “put equivalent position” or any “call equivalent position” (in each case, as defined in Rule 16a-1 promulgated under the Exchange Act.

12.1 Right of First Refusal. The Company and/or its assignee(s) shall have a right of first refusal to purchase all Shares that a Participant (or a subsequent transferee) may propose to transfer to a third party, unless otherwise not permitted by Section 25102(o) of the California Corporations Code, provided that such right of first refusal terminates upon the Company’s initial public offering of Common Stock pursuant to an effective registration statement filed under the Securities Act.

12.2 Right of Repurchase. The Company and/or its assignee(s) shall have a right to repurchase Unvested Shares held by a Participant for cash and/or cancellation of purchase money indebtedness owed to the Company by the Participant following such Participant’s Termination at any time within the later of ninety (90) days after the Participant’s Termination Date and the date the Participant purchases Shares under the Plan at the Participant’s Exercise Price or Purchase Price, as the case may be.

(a) Restrictions on Transfer; Twenty Percent Limitation. Without limitation of any other restriction on transfer set forth in this Plan, Participant shall be bound by each of the following restrictions:

(i) No Participant shall Transfer any Stock (aggregated on a cumulative basis together with all prior Transfers by such Participant and its Permitted Transferees),

in an amount that exceeds the Twenty Percent Limitation. The “Twenty Percent Limitation” as used in this Section 12.3(a) shall mean, for each Participant, a Transfer (aggregated on a cumulative basis together with all prior Transfers by such Participant and its Permitted Transferees) of up to an aggregate of twenty-percent (20%) of the Aggregate Stock that has ever been held by such Participant (counting all shares held prior to the date hereof, now or hereafter, including shares previously or hereafter Transferred by such Participant or its Permitted Transferees). “Aggregate Stock” means the maximum number of shares of Stock, including securities convertible into, exercisable for and otherwise exchangeable for such shares of Stock and for further clarity, (i) includes all Stock issuable pursuant to outstanding stock options held by such Participant, (ii) excludes shares of Stock formerly issuable pursuant to options held by such Participant that have been terminated or cancelled for more than ninety (90) days, and (iii) includes any shares of Stock previously or hereafter Transferred by such Participant or its Permitted Transferees.

(ii) No Participant shall Transfer any Stock at any time to any Special Purpose Entity unless sales of Stock to such Special Purpose Entity have been approved by the Company’s Compensation Committee or Board of Directors.

(iii) Each Proposed Transferee shall agree, as a condition to any Transfer of Stock to such Proposed Transferee by any Participant, to be bound by the restrictions set forth in the form stock transfer agreement provided by the Company as may be amended from time to time in the Company’s discretion, which shall include, among other provisions, a prohibition on subsequent sales of the Company’s securities by the Proposed Transferee until the closing of an IPO or the consummation of a Deemed Liquidation Event (including with respect to the shares of Stock proposed to be purchased by the Proposed Transferee and other securities of the Company held by the Proposed Transferee).

(iv) Each Participant shall comply with the Company’s Insider Trading Policy as may be adopted or amended from time to time by the Company’s Board of Directors (the “Insider Trading Policy”). To the extent Participant is not an employee of the Company, such Participant shall comply with the Company’s Insider Trading Policy in the same manner as-if such Participant were deemed an employee of the Company as defined in the Insider Trading Policy. No Participant shall Transfer any Stock at any time other than during trading windows as proscribed by the Company from time to time in accordance with the Insider Trading Policy.

(v) No Participant may list, sell or offer to sell or otherwise trade in Company securities on any private market place or securities exchange, including without limitation on SecondMarket or SharesPost (each, a “Private Market Exchange”), until such time that a court of competent jurisdiction or appropriate regulatory authority has issued a ruling or endorsed the activities of such Private Market Exchange as compliant with applicable securities law to the Company’s reasonable satisfaction.

(vi) Before any Participant may Transfer any Stock to any person or entity engaged or planning to engage in activities competitive, either directly or indirectly, with the then current and proposed products and services of the Company, or any affiliate of such person or entity, as determined in good faith by the Company’s Board of Directors, such Participant must obtain the prior written consent of the Company’s Board of Directors, which consent may be withheld in its sole discretion even if to do so would be deemed unreasonable.

(vii) The foregoing restriction on transfer with respect to the Stock shall lapse upon the earlier of (i) immediately prior to the closing of the IPO or (ii) the consummation of a Deemed Liquidation Event.

(viii) To the extent any capitalized terms in this Section 12.3(a) are defined in Section 24 of the Plan, such definitions set forth in Section 24 shall control and govern over any conflicting definitions set forth in other sections of the Plan.

(b) Continuing Restrictions on Transfer for Certain Participants. Without limiting any right or remedy of the Company to enforce Section 12.3(a) of the Plan, to the extent any person who was a Participant in the Plan prior to the adoption of Section 12.3(a) does not agree to be bound by or otherwise comply with the restrictions in Section 12.3(a) hereof, the following restrictions on transfer (which were formerly set forth in Section 12.3 of the Plan) will continue to apply to such Participant:

(i) Participant shall not transfer, assign, encumber or otherwise dispose of any of the Shares issuable pursuant to an Option, other than by means of a Permitted Transfer. A “Permitted Transfer” solely as used in this Section 12.3(b) shall mean (i) except with respect to a Participant covered by subparagraph (ii) of this Section 12.3(b)(i) below, a transfer of up to an aggregate of ten percent (10%) of the Shares issuable pursuant to an Option, through one or more transfers, (ii) with respect to a Participant who was once an employee of the Company, or a Parent or Subsidiary of the Company, but is not currently an employee of the Company, or a Parent or Subsidiary of the Company, a transfer of up to an aggregate of twenty percent (20%) of the Shares issuable pursuant to an Option (including any Shares that may have already been transferred pursuant to subparagraph (i) of this Section 12.3(b)(i)), through one or more transfers, (iii) a transfer by gift of the Shares made to the Participant’s spouse, or children, including adopted children, or to a trust for the exclusive benefit of the Participant or the Participant’s spouse or children, or (iv) a transfer of title to the Shares effected pursuant to the Participant’s will or the laws of intestate succession. The foregoing restriction on transfer with respect to the Shares shall lapse upon (x) the Shares becoming publicly traded on a national securities exchange or (y) a corporate transaction as described in Section 18.

(c) Transferee Obligations. Each person (other than the Company) to whom Stock or Shares are transferred in accordance with Section 12.3(a) or Section 12.3(b), respectively, hereof must, as a condition precedent to the validity of such transfer, be required to acknowledge in writing to the Company that such person is bound by the provisions of this Section 12 to the same extent that such Stock or Shares would be so subject if retained by the Participant.

13. CERTIFICATES. All certificates for Shares or other securities delivered under this Plan will be subject to such stock transfer orders, legends and other restrictions as the Committee may deem necessary or advisable, including restrictions under any applicable federal, state or foreign securities law, or any rules, regulations and other requirements of the SEC or any stock exchange or automated quotation system upon which the Shares may be listed or quoted.

14. ESCROW; PLEDGE OF SHARES. To enforce any restrictions on a Participant’s Shares set forth in Section 12 hereof, the Committee may require the Participant to deposit all certificates representing Shares, together with stock powers or other instruments of transfer approved by the Committee, appropriately endorsed in blank, with the Company or an agent designated by the Company to hold in escrow until such restrictions have lapsed or terminated. The Committee may cause a legend or legends referencing such restrictions to be placed on the certificates. Any Participant who is permitted to execute a promissory note as partial or full consideration for the purchase of Shares under this Plan will be required to pledge and deposit with the Company all or part of the Shares so purchased as collateral to secure the payment of Participant’s obligation to the Company under the promissory note; provided, however, that the Committee may require or accept other or additional forms of collateral to secure the payment of such obligation and, in any event, the Company will have full recourse against the Participant under the promissory note notwithstanding any pledge of the Participant’s Shares or other collateral. In connection with any pledge of the Shares, Participant will be required to execute and deliver a written pledge agreement in such form as the Committee will from time to time approve. The Shares purchased with the promissory note may be released from the pledge on a pro rata basis as the promissory note is paid.

15. EXCHANGE AND BUYOUT OF AWARDS. The Committee may, at any time or from time to time, authorize the Company, with the consent of the respective Participants, to issue new Awards in exchange for the surrender and cancellation of any or all outstanding Awards. The Committee may at any time buy from a Participant an Award previously granted with payment in cash, shares of Common Stock of the Company (including Restricted Stock) or other consideration, based on such terms and conditions as the Committee and the Participant may agree.

16. SECURITIES LAW AND OTHER REGULATORY COMPLIANCE. Although this Plan is intended to be a written compensatory benefit plan within the meaning of Rule 701 promulgated under the Securities Act, grants may be made pursuant to this plan that do not qualify for exemption under Rule 701 or Section 25102(o) of the California Corporations Code. Any requirement of this Plan which is required in law only because of Section 25102(o) need not apply if the Committee so provides. An Award will not be effective unless such Award is in compliance with all applicable federal and state securities laws, rules and regulations of any governmental body, and the requirements of any stock exchange or automated quotation system upon which the Shares may then be listed or quoted, as they are in effect on the date of grant of the Award and also on the date of exercise or other issuance. Notwithstanding any other provision in this Plan, the Company will have no obligation to issue or deliver certificates for Shares under this Plan prior to (i) obtaining any approvals from governmental agencies that the Company determines are necessary or advisable, and/or (ii) compliance with any exemption, completion of any registration or other qualification of such Shares under any state or federal law or ruling of any governmental body that the Company determines to be necessary or advisable. The Company will be under no obligation to register the Shares with the SEC or to effect compliance with the exemption, registration, qualification or listing requirements of any state securities laws, stock exchange or automated quotation system, and the Company will have no liability for any inability or failure to do so.

17. NO OBLIGATION TO EMPLOY. Nothing in this Plan or any Award granted under this Plan will confer or be deemed to confer on any Participant any right to continue in the employ of, or to continue any other relationship with, the Company or any Parent or Subsidiary of

the Company or limit in any way the right of the Company or any Parent or Subsidiary of the Company to terminate Participant’s employment or other relationship at any time, with or without Cause.

18.1 Assumption or Replacement of Awards by Successor or Acquiring Company. In the event of (i) a dissolution or liquidation of the Company, (ii) any reorganization, consolidation, merger or similar transaction or series of related transactions (each, a “combination transaction”)) in which the Company is a constituent corporation or is a party if, as a result of such combination transaction, the voting securities of the Company that are outstanding immediately prior to the consummation of such combination transaction (other than any such securities that are held by an “Acquiring Stockholder”, as defined below) do not represent, or are not converted into, securities of the surviving corporation of such combination transaction (or such surviving corporation’s parent corporation if the surviving corporation is owned by the parent corporation) that, immediately after the consummation of such combination transaction, together possess at least fifty percent (50%) of the total voting power of all securities of such surviving corporation (or its parent corporation, if applicable) that are outstanding immediately after the consummation of such combination transaction, including securities of such surviving corporation (or its parent corporation, if applicable) that are held by the Acquiring Stockholder; or (iii) a sale of all or substantially all of the assets of the Company, that is followed by the distribution of the proceeds to the Company’s stockholders, any or all outstanding Awards may be assumed, converted or replaced by the successor or acquiring corporation (if any), which assumption, conversion or replacement will be binding on all Participants. In the alternative, the successor or acquiring corporation may substitute equivalent Awards or provide substantially similar consideration to Participants as was provided to stockholders of the Company (after taking into account the existing provisions of the Awards). The successor or acquiring corporation may also substitute by issuing, in place of outstanding Shares of the Company held by the Participant, substantially similar shares or other property subject to repurchase restrictions and other provisions no less favorable to the Participant than those which applied to such outstanding Shares immediately prior to such transaction described in this Section 18.1. For purposes of this Section 18.1, an “Acquiring Stockholder” means a stockholder or stockholders of the Company that (i) merges or combines with the Company in such combination transaction or (ii) owns or controls a majority of another corporation that merges or combines with the Company in such combination transaction. In the event such successor or acquiring corporation (if any) does not assume, convert, replace or substitute Awards, as provided above, pursuant to a transaction described in this Section 18.1, then notwithstanding any other provision in this Plan to the contrary, the vesting of such Awards will accelerate in full and the Awards will become exercisable as to all of the Shares subject to such Awards prior to the consummation of such event at such times and on such conditions as the Committee determines, and to the extent that any of such Options are not exercised prior to the consummation of the corporate transaction, they shall terminate in accordance with the provisions of this Plan.

18.2 Other Treatment of Awards. Subject to any greater rights granted to Participants under the foregoing provisions of this Section 18, in the event of the occurrence of any transaction described in Section 18.1 hereof, any outstanding Awards will be treated as provided in the applicable agreement or plan of reorganization, merger, consolidation, dissolution, liquidation or sale of assets.

18.3 Assumption of Awards by the Company. The Company, from time to time, also may substitute or assume outstanding awards granted by another company, whether in connection with an acquisition of such other company or otherwise, by either (i) granting an Award under this Plan in substitution of such other company’s award or (ii) assuming such award as if it had been granted under this Plan if the terms of such assumed award could be applied to an Award granted under this Plan. Such substitution or assumption will be permissible if the holder of the substituted or assumed award would have been eligible to be granted an Award under this Plan if the other company had applied the rules of this Plan to such grant. In the event the Company assumes an award granted by another company, the terms and conditions of such award will remain unchanged (except that the exercise price and the number and nature of shares issuable upon exercise of any such option will be adjusted appropriately pursuant to Section 424(a) of the Code). In the event the Company elects to grant a new Option rather than assuming an existing option, such new Option may be granted with a similarly adjusted Exercise Price.

19. ADOPTION AND STOCKHOLDER APPROVAL. This Plan will become effective on the date that it is adopted by the Board (the “Effective Date”). This Plan will be approved by the stockholders of the Company (excluding Shares issued pursuant to this Plan), consistent with applicable laws, within twelve (12) months before or after the Effective Date. Upon the Effective Date, the Board may grant Awards pursuant to this Plan; provided, however, that: (i) no Option granted pursuant to an increase in the number of Shares approved by the Board shall be exercised prior to the time such increase has been approved by the stockholders of the Company; and (ii) Awards granted pursuant to an increase in the number of Shares approved by the Board which increase is not timely approved by stockholders shall be canceled, any Shares issued pursuant to any such Awards shall be canceled, and any purchase of Shares subject to any such Award shall be rescinded.

20. TERM OF PLAN/GOVERNING LAW. Unless earlier terminated as provided herein, this Plan will automatically terminate ten (10) years after the later of (i) the Effective Date, or (ii) the most recent increase in the number of Shares reserved under Section 2 that was approved by stockholders. This Plan and all agreements hereunder shall be governed by and construed in accordance with the laws of the State of California.

21. AMENDMENT OR TERMINATION OF PLAN. Subject to Section 5.9 hereof, the Board may at any time terminate or amend this Plan in any respect, including without limitation amendment of any form of Award Agreement or instrument to be executed pursuant to this Plan; provided, however, that the Board will not, without the approval of the stockholders of the Company, amend this Plan in any manner that requires such stockholder approval pursuant to Section 25102(o) of the California Corporations Code or the Code or the regulations promulgated thereunder as such provisions apply to ISO plans. The termination of the Plan, or any amendment thereof, shall not affect any Share previously issued or any Award previously granted under the Plan.

22. NONEXCLUSIVITY OF THE PLAN. Neither the adoption of this Plan by the Board, the submission of this Plan to the stockholders of the Company for approval, nor any

provision of this Plan will be construed as creating any limitations on the power of the Board to adopt such additional compensation arrangements as it may deem desirable, including, without limitation, the granting of stock options and other equity awards otherwise than under this Plan, and such arrangements may be either generally applicable or applicable only in specific cases.

23. DEFINITIONS. As used in this Plan, the following terms will have the following meanings:

“Award” means any award under this Plan, including any Option, Restricted Stock or RSU Award.

“Award Agreement” means, with respect to each Award, the signed written agreement between the Company and the Participant setting forth the terms and conditions of the Award, including the Stock Option Agreement and Restricted Stock Agreement.

“Cause” means Termination because of (i) any willful, material violation by the Participant of any law or regulation applicable to the business of the Company or a Parent or Subsidiary of the Company, the Participant’s conviction for, or guilty plea to, a felony or a crime involving moral turpitude, or any willful perpetration by the Participant of a common law fraud, (ii) the Participant’s commission of an act of personal dishonesty which involves personal profit in connection with the Company or any other entity having a business relationship with the Company, (iii) any material breach by the Participant of any provision of any agreement or understanding between the Company or any Parent or Subsidiary of the Company and the Participant regarding the terms of the Participant’s service as an employee, officer, director or consultant to the Company or a Parent or Subsidiary of the Company, including without limitation, the willful and continued failure or refusal of the Participant to perform the material duties required of such Participant as an employee, officer, director or consultant of the Company or a Parent or Subsidiary of the Company, other than as a result of having a Disability, or a breach of any applicable invention assignment and confidentiality agreement or similar agreement between the Company or a Parent or Subsidiary of the Company and the Participant, (iv) Participant’s disregard of the policies of the Company or any Parent or Subsidiary of the Company so as to cause loss, damage or injury to the property, reputation or employees of the Company or a Parent or Subsidiary of the Company, or (v) any other misconduct by the Participant which is materially injurious to the financial condition or business reputation of, or is otherwise materially injurious to, the Company or a Parent or Subsidiary of the Company.

“Committee” means the committee created and appointed by the Board to administer this Plan, or if no committee is created and appointed, the Board.

“Disability” means a disability, whether temporary or permanent, partial or total, as determined by the Committee.

“Exercise Price” means the price at which a holder of an Option may purchase the Shares issuable upon exercise of the Option.

“Fair Market Value” means, as of any date, the value of a share of the Company’s Common Stock determined as follows:

(a) if such Common Stock is then quoted on the Nasdaq National Market, its closing price on the Nasdaq National Market on the date of determination as reported in Yahoo.com (or any newspaper or other source as the Board may determine);

(b) if such Common Stock is publicly traded and is then listed on a national securities exchange, its closing price on the date of determination on the principal national securities exchange on which the Common Stock is listed or admitted to trading as reported in Yahoo.com(or any newspaper or other source as the Board may determine);

(c) if such Common Stock is publicly traded but is not quoted on the Nasdaq National Market nor listed or admitted to trading on a national securities exchange, the average of the closing bid and asked prices on the date of determination as reported in Yahoo.com (or, if not so reported, as otherwise reported by any newspaper or other source as the Board may determine); or

“Option” means an award of an option to purchase Shares pursuant to Section 5 hereof.

“Parent” means any corporation (other than the Company) in an unbroken chain of corporations ending with the Company if each of such corporations other than the Company owns stock representing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

“Plan” means this Twitter, Inc. 2007 Equity Incentive Plan, as amended from time to time.

“Purchase Price” means the price at which a Participant may purchase Restricted Stock.

“Restricted Stock” means Shares purchased pursuant to a Restricted Stock Award.

“Restricted Stock Award” means an award of Shares pursuant to Section 6 hereof.

“Restricted Stock Unit” or “RSU” means an award made pursuant to Section 7 hereof.

“Shares” means shares of the Company’s Common Stock $0.000005, par value, reserved for issuance under this Plan, as adjusted pursuant to Sections 2 and 18 hereof, and any successor security.

“Subsidiary” means any corporation (other than the Company) in an unbroken chain of corporations beginning with the Company if each of the corporations other than the last corporation in the unbroken chain owns stock representing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

“Termination” or “Terminated” means, for purposes of this Plan with respect to a Participant, that the Participant has for any reason ceased to provide services as an employee, officer, director or consultant to the Company or a Parent or Subsidiary of the Company. A Participant will not be deemed to have ceased to provide services in the case of (i) sick leave, (ii) military leave, or (iii) any other leave of absence approved by the Committee, provided that such leave is for a period of not more than ninety (90) days (a) unless reinstatement (or, in the case of an employee with an ISO, reemployment) upon the expiration of such leave is guaranteed by contract or statute, or (b) unless provided otherwise pursuant to formal policy adopted from time to time by the Company’s Board and issued and promulgated in writing. In the case of any Participant on (i) sick leave, (ii) military leave or (iii) an approved leave of absence, the Committee may make such provisions respecting suspension of vesting of the Award while on leave from the Company or a Parent or Subsidiary of the Company as it may deem appropriate, except that in no event may an Option be exercised after the expiration of the term set forth in the Stock Option Agreement. The Committee will have sole discretion to determine whether a Participant has ceased to provide services and the effective date on which the Participant ceased to provide services (the “Termination Date”).

“Unvested Shares” means “Unvested Shares” as defined in the Award Agreement.

“Vested Shares” means “Vested Shares” as defined in the Award Agreement.

24. DEFINITIONS FOR PURPOSES OF SECTION 12.3(a) OF THE PLAN, INCLUDING THE TWENTY PERCENT LIMITATION. As used in this Plan, with respect to Section 12.3(a), the following terms will have the following meanings:

“Deemed Liquidation Event” shall have the meaning as defined in Section 3.7, Article V of the Restated Certificate of Incorporation of the Company, as such may be amended and/or restated from time to time.

“Family Member” shall mean with respect to any natural person who is a Qualified Stockholder, the spouse, parents, grandparents, lineal descendents, siblings and lineal descendants of siblings of such Qualified Stockholder.

“IPO” means the first sale of the Company’s Common Stock to the general public pursuant to a registration statement under the Securities Act of 1933, as amended.

“Permitted Entity” shall mean with respect to a Qualified Stockholder (a) a Permitted Trust (as defined below) solely for the benefit of (i) such Qualified Stockholder, (ii) one or more Family

Members of such Qualified Stockholder and/or (iii) any other Permitted Entity of such Qualified Stockholder, or (b) any general partnership, limited partnership, limited liability company, corporation or other entity exclusively owned by (i) such Qualified Stockholder, (ii) one or more Family Members of such Qualified Stockholder and/or (iii) any other Permitted Entity of such Qualified Stockholder.

“Permitted Transfer” shall mean, and be restricted to, any Transfer of a share of Stock: (a) by a Qualified Stockholder to (i) one or more Family Members of such Qualified Stockholder, or (ii) any Permitted Entity of such Qualified Stockholder; or (b) by a Permitted Entity of a Qualified Stockholder to (i) such Qualified Stockholder or one or more Family Members of such Qualified Stockholder, or (ii) any other Permitted Entity of such Qualified Stockholder; provided, however, that in the case of such Transfer the party to which such shares of Stock are transferred agrees in writing to be bound by the terms of this Plan (including Section 12.3) and any other applicable restrictions on such shares of Stock.

“Permitted Transferee” shall mean a transferee of shares of Stock received in a Transfer that constitutes a Permitted Transfer.

“Permitted Trust” shall mean a bona fide trust where each trustee is (a) a Qualified Stockholder, (b) Family Member or (c) a professional in the business of providing trustee services, including private professional fiduciaries, trust companies and bank trust departments.

“Qualified Stockholder” shall mean (a) any Participant under this Plan; or (b) any Permitted Transferee.

“Stock” means and includes all shares of Common Stock issued and outstanding at the relevant time plus (a) all shares of Common Stock that may be issued upon exercise of any options, warrants and other rights of any kind that are then exercisable, and (b) all shares of Common Stock that may be issued upon conversion of (i) any convertible securities, including, without limitation, Preferred Stock and debt securities then outstanding that are by their terms then convertible into or exchangeable for Common Stock or (ii) any such convertible securities issuable upon exercise of outstanding options, warrants or other rights that are then exercisable.

“Special Purpose Entity” shall mean an entity that holds or would hold only securities of the Company or has or would have a class or series of security holders with beneficial interests primarily in securities of the Company (including for such purpose an entity that holds cash and/or cash equivalents intended to purchase such securities).

“Transfer” and “Transferred” mean and include any sale, assignment, transfer, conveyance, hypothecation or other transfer or disposition of a share of Stock or any legal or beneficial interest in such share, whether or not for value and whether voluntary or involuntary or by operation of law, including without limitation, a transfer of a share of Stock to a broker or other nominee (regardless of whether there in a corresponding change in beneficial ownership), or the transfer of, or entering into a binding agreement with respect to, Voting Control (as defined below) over such share by proxy or otherwise; provided, however that the following shall not be considered a “Transfer”:

(a) the granting of a revocable proxy to officers or directors of the Company at the request of the Company’s Board of Directors in connection with actions to be taken at an annual or special meeting of the stockholders;

(b) entering into a voting trust, agreement or arrangement (with or without granting a proxy) solely with stockholders who are holders of shares of Stock that (i) is disclosed in writing to the Secretary of the Company, (ii) either has a term not exceeding one (1) year or is terminable by the holder of the shares subject thereto at any time and (iii) does not involve any payment of cash, securities, property or other consideration to the holder of the shares subject thereto other than the mutual promise to vote shares in a designated manner;

(d) a Permitted Transfer provided, however that the party to which such shares of Stock are transferred agrees in writing to be bound by the terms of this Plan (including Section 12.3) and any other applicable restrictions on such shares of Stock.

A “Transfer” shall also be deemed to have occurred with respect to shares of Stock beneficially held by (i) an entity that is a Permitted Entity, if there occurs any act or circumstance that causes such entity to no longer be a Permitted Entity or (ii) an entity that is a Qualified Stockholder, if there occurs a Transfer on a cumulative basis, from and after the date hereof, of a majority of the voting power of the voting securities of such entity or any direct or indirect Parent (as defined below) of such entity, other than a Transfer to parties that are, as of the date hereof, holders of voting securities of any such entity or Parent of such entity. “Parent” of an entity shall mean any entity that directly or indirectly owns or controls a majority of the voting power of the voting securities of such entity.

“Voting Control” shall mean, with respect to a share of Stock, the power (whether exclusive or shared) to vote or direct the voting of such share by proxy, voting agreement or otherwise.

This Stock Option Agreement (the “Agreement”) is made and entered into as of the date of grant set forth below (the “Date of Grant”) by and between Twitter, Inc., a Delaware corporation (the “Company”), and the participant named below (the “Participant”). Capitalized terms not defined herein shall have the meaning ascribed to them in the Company’s 2007 Equity Incentive Plan (the “Plan”).

1. GRANT OF OPTION. The Company hereby grants to Participant an option (this “Option”) to purchase the total number of shares of Common Stock, $0.000005 par value, of the Company set forth above as Total Option Shares (the “Shares”) at the Exercise Price Per Share set forth above (the “Exercise Price”), subject to all of the terms and conditions of this Agreement and the Plan. If designated as an Incentive Stock Option above, the Option is intended to qualify as an “incentive stock option” (the “ISO”) within the meaning of Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”).

Exercise Period of Option. Provided Participant continues to provide services to the Company or to any Parent or Subsidiary of the Company, the Option will become vested and exercisable with respect to [insert vesting schedule]. If application of the vesting percentage causes a fractional share, such share shall be rounded down to the nearest whole share for each month, except for the months in which the sum of such fractional shares equals a whole share, on the vest date of such month, the total fractional shares equaling a whole share shall vest.

2.1 Vesting of Options. Shares that are vested pursuant to the schedule set forth in Section 2.1 are “Vested Shares.” Shares that are not vested pursuant to the schedule set forth in Section 2.1 are “Unvested Shares.”

2.2 Expiration. The Option shall expire on the Expiration Date set forth above or earlier as provided in Section 3 below or pursuant to Section 5.6 of the Plan.

3.1 Termination for Any Reason except Death, Disability or Cause. If Participant is Terminated for any reason, except death, Disability or for Cause, the Option, to the extent (and only to the extent) that it would have been exercisable by Participant on the Termination Date, may be exercised by Participant no later than three (3) months after the Termination Date, but in any event no later than the Expiration Date.

3.2 Termination Because of Death or Disability. If Participant is Terminated because of death or Disability of Participant (or Participant dies within three (3) months of Termination when Termination is for any reason other than Participant’s Disability or for Cause), the Option, to the extent that it is exercisable by Participant on the Termination Date, may be exercised by Participant (or Participant’s legal representative) no later than twelve (12) months after the Termination Date, but in any event no later than the Expiration Date. Any exercise beyond (i) three (3) months after the Termination Date when the Termination is for any reason other than the Participant’s death or disability, within the meaning of Section 22(e)(3) of the Code; or (ii) twelve (12) months after the Termination Date when the termination is for Participant’s disability, within the meaning of Section 22(e)(3) of the Code, is deemed to be an NQSO.

3.3 Termination for Cause. If the Participant is terminated for Cause, the Participant may exercise such Participant’s Options, but not to an extent greater than such Options are exercisable as to Vested Shares upon the Termination Date and Participant’s Options shall expire on such Participant’s Termination Date, or at such later time and on such conditions as are determined by the Committee.

3.4 No Obligation to Employ. Nothing in the Plan or this Agreement shall confer on Participant any right to continue in the employ of, or other relationship with, the Company or any Parent or Subsidiary of the Company, or limit in any way the right of the Company or any Parent or Subsidiary of the Company to terminate Participant’s employment or other relationship at any time, with or without Cause.

4.1 Stock Option Exercise Agreement. To exercise this Option, Participant (or in the case of exercise after Participant’s death or incapacity, Participant’s executor, administrator, heir or legatee, as the case may be) must deliver to the Company an executed stock option exercise agreement in the form attached hereto as Exhibit A, or in such other form as may be approved by the Committee from time to time (the “Exercise Agreement”), which shall set forth, inter alia, (i) Participant’s election to exercise the Option, (ii) the number of Shares being purchased, (iii) any restrictions imposed on the Shares and (iv) any representations, warranties and agreements regarding Participant’s investment intent and access to information as may be required by the Company to comply with applicable securities laws. If someone other than Participant exercises the Option, then such person must submit documentation reasonably acceptable to the Company verifying that such person has the legal right to exercise the Option and such person shall be subject to all of the restrictions contained herein as if such person were the Participant.

4.2 Limitations on Exercise. The Option may not be exercised unless such exercise is in compliance with all applicable federal and state securities laws, as they are in effect on the date of exercise. The Option may not be exercised as to fewer than one hundred (100) Shares unless it is exercised as to all Shares as to which the Option is then exercisable.

4.3 Payment. The Exercise Agreement shall be accompanied by full payment of the Exercise Price for the shares being purchased in cash (by check), or where permitted by law:

(b) by surrender of shares of the Company’s Common Stock that (i) either (A) have been owned by Participant for more than six (6) months and have been paid for within the meaning of SEC Rule 144 (and, if such shares were purchased from the Company by use of a promissory note, such note has been fully paid with respect to such shares); or (B) were obtained by Participant in the open public market; and (ii) are clear of all liens, claims, encumbrances or security interests;

(d) provided that a public market for the Company’s stock exists: (i) through a “same day sale” commitment from Participant and a broker-dealer that is a member of the National Association of Securities Dealers (an “NASD Dealer”) whereby Participant irrevocably elects to exercise the Option and to sell a portion of the Shares so purchased sufficient to pay for the total Exercise Price and whereby the NASD Dealer irrevocably commits upon receipt of such Shares to forward the total Exercise Price directly to the Company, or (ii) through a “margin” commitment from Participant and an NASD Dealer whereby Participant irrevocably elects to exercise the Option and to pledge the Shares so purchased to the NASD

Dealer in a margin account as security for a loan from the NASD Dealer in the amount of the total Exercise Price, and whereby the NASD Dealer irrevocably commits upon receipt of such Shares to forward the total Exercise Price directly to the Company;

4.4 Tax Withholding. Prior to the issuance of the Shares upon exercise of the Option, Participant must pay or provide for any applicable federal, state and local withholding obligations of the Company. If the Committee permits, Participant may provide for payment of withholding taxes upon exercise of the Option by requesting that the Company retain the minimum number of Shares with a Fair Market Value equal to the minimum amount of taxes required to be withheld; but in no event will the Company withhold Shares if such withholding would result in adverse accounting consequences to the Company. In such case, the Company shall issue the net number of Shares to the Participant by deducting the Shares retained from the Shares issuable upon exercise.

4.5 Issuance of Shares. Provided that the Exercise Agreement and payment are in form and substance satisfactory to counsel for the Company, the Company shall issue the Shares registered in the name of Participant, Participant’s authorized assignee, or Participant’s legal representative, and shall deliver certificates representing the Shares with the appropriate legends affixed thereto.

5. NOTICE OF DISQUALIFYING DISPOSITION OF ISO SHARES. If the Option is an ISO, and if Participant sells or otherwise disposes of any of the Shares acquired pursuant to the ISO on or before the later of (i) the date two (2) years after the Date of Grant, and (ii) the date one (1) year after transfer of such Shares to Participant upon exercise of the Option, Participant shall immediately notify the Company in writing of such disposition. Participant agrees that Participant may be subject to income tax withholding by the Company on the compensation income recognized by Participant from the early disposition by payment in cash or out of the current wages or other compensation payable to Participant.

6. COMPLIANCE WITH LAWS AND REGULATIONS. The Plan and this Agreement are intended to comply with Section 25102(o) of the California Corporations Code and any regulations relating thereto. Any provision of this Agreement that is inconsistent with Section 25102(o) or any regulations relating thereto shall, without further act or amendment by the Company or the Board, be reformed to comply with the requirements of Section 25102(o) and any regulations relating thereto. The exercise of the Option and the issuance and transfer of Shares shall be subject to compliance by the Company and Participant with all applicable requirements of federal and state securities laws and with all applicable requirements of any stock exchange on which the Company’s Common Stock may be listed at the time of such issuance or transfer. Participant understands that the Company is under no obligation to register or qualify the Shares with the SEC, any state securities commission or any stock exchange to effect such compliance.

7. NONTRANSFERABILITY OF OPTION. The Option may not be transferred in any manner other than by will or by the laws of descent and distribution, and, with respect to NQSOs, by instrument to an inter vivos or testamentary trust in which the options are to be passed to beneficiaries upon the death of the trustor (settlor), or by gift to “immediate family” as that term is defined in 17 C.F.R. 240.16a-1(e), and may be exercised during the lifetime of Participant only by Participant or in the event of Participant’s incapacity, by Participant’s legal representative. The terms of the Option shall be binding upon the executors, administrators, successors and assigns of Participant.

8. TAX CONSEQUENCES. Set forth below is a brief summary as of the Effective Date of the Plan of some of the federal and California tax consequences of exercise of the Option and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. PARTICIPANT SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THE OPTION OR DISPOSING OF THE SHARES.

8.1 Exercise of ISO. If the Option qualifies as an ISO, there will be no regular federal or California income tax liability upon the exercise of the Option, although the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price will be treated as a tax preference item for federal alternative minimum tax purposes and may subject the Participant to the alternative minimum tax in the year of exercise.

8.2 Exercise of Nonqualified Stock Option. If the Option does not qualify as an ISO, there may be a regular federal and California income tax liability upon the exercise of the Option. Participant will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price. If Participant is a current or former employee of the Company, the Company may be required to withhold from Participant’s compensation or collect from Participant and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income at the time of exercise.

8.3 Disposition of Shares. The following tax consequences may apply upon disposition of the Shares:

(a) Incentive Stock Options. If the Shares are held for more than twelve (12) months after the date of purchase of the Shares pursuant to the exercise of an ISO and are disposed of more than two (2) years after the Date of Grant, any gain realized on disposition of the Shares will be treated as long term capital gain for federal and California income tax purposes. If Vested Shares purchased under an ISO are disposed of within the applicable one (1) year or two (2) year period, any gain realized on such disposition will be treated as compensation income (taxable at ordinary income rates in the year of the disposition) to the extent of the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price.

(b) Nonqualified Stock Options. If the Shares are held for more than twelve (12) months after the date of purchase of the Shares pursuant to the exercise of an NQSO, any gain realized on disposition of the Shares will be treated as long-term capital gain.

(c) Withholding. The Company may be required to withhold from the Participant’s compensation or collect from the Participant and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income.

9. PRIVILEGES OF STOCK OWNERSHIP. Participant shall not have any of the rights of a stockholder with respect to any Shares until the Shares are issued to Participant.

10.1 Right of First Refusal. The Company and/or its assignee(s) shall have a right of first refusal (the “Right of First Refusal”) to purchase all Shares that a Participant (or a subsequent transferee) may propose to transfer to a third party (including, without limitation, a transfer by gift or operation of law), unless otherwise not permitted by Section 25102(o) of the California Corporations Code, provided that such Right of First Refusal terminates upon the Company’s initial public offering of Common Stock pursuant to an effective registration statement filed under the Securities Act.

(a) Restrictions on Transfer; Twenty Percent Limitation. Without limitation of any other restriction on transfer set forth in this Agreement or the Plan, Participant shall be bound by each of the following restrictions:

(i) Participant shall not Transfer any Stock (aggregated on a cumulative basis together with all prior Transfers by Participant and its Permitted Transferees), in an amount that exceeds the Twenty Percent Limitation. The “Twenty Percent Limitation” as used in this Section 10.2(a) shall mean, for Participant, a Transfer (aggregated on a cumulative basis together with all prior Transfers by Participant and its Permitted Transferees) of up to an aggregate of twenty-percent (20%) of the Aggregate Stock that has ever been held by Participant (counting all shares held prior to the date hereof, now or hereafter, including shares previously or hereafter Transferred by Participant or its Permitted Transferees). “Aggregate Stock” means the maximum number of shares of Stock, including securities convertible into, exercisable for and otherwise exchangeable for such shares of Stock and for further clarity, (i) includes all Stock issuable pursuant to outstanding stock options held by Participant, (ii) excludes shares of Stock formerly issuable pursuant to options held by Participant that have been terminated or cancelled for more than ninety (90) days, and (iii) includes any shares of Stock previously or hereafter Transferred by Participant or its Permitted Transferees.

(ii) Participant shall not Transfer any Stock at any time to any Special Purpose Entity unless sales of Stock to such Special Purpose Entity have been approved by the Company’s Compensation Committee or Board of Directors.

(iii) Each Proposed Transferee shall agree, as a condition to any Transfer of Stock to such Proposed Transferee by Participant, to be bound by the restrictions set forth in the form stock transfer agreement provided by the Company as may be amended from time to time in the Company’s discretion, which shall include, among other provisions, a prohibition on subsequent sales of the Company’s securities by the Proposed Transferee until the closing of an IPO or the consummation of a Deemed Liquidation Event (including with respect to the shares of Stock proposed to be purchased by the Proposed Transferee and other securities of the Company held by the Proposed Transferee).

(iv) Participant shall comply with the Company’s Insider Trading Policy as may be adopted or amended from time to time by the Company’s Board of Directors (the “Insider Trading Policy”). To the extent Participant is not an employee of the Company, Participant shall comply with the Company’s Insider Trading Policy in the same manner as-if Participant were deemed an employee of the Company as defined in the Insider Trading Policy. Participant shall not Transfer any Stock at any time other than during trading windows as proscribed by the Company from time to time in accordance with the Insider Trading Policy.

(v) Participant may not list, sell or offer to sell or otherwise trade in Company securities on any private market place or securities exchange, including without limitation on SecondMarket or SharesPost (each, a “Private Market Exchange”), until such time that a court of competent jurisdiction or appropriate regulatory authority has issued a ruling or endorsed the activities of such Private Market Exchange as compliant with applicable securities law to the Company’s reasonable satisfaction.

(vi) Before Participant may Transfer any Stock to any person or entity engaged or planning to engage in activities competitive, either directly or indirectly, with the then current and proposed products and services of the Company, or any affiliate of such person or entity, as determined in good faith by the Company’s Board of Directors, Participant must obtain the prior written consent of the Company’s Board of Directors, which consent may be withheld in its sole discretion even if to do so would be deemed unreasonable.

(viii) To the extent any capitalized terms in this Section 10.2(a) are defined in Section 24 of the Plan, such definitions set forth in Section 24 shall control and govern over any conflicting definitions set forth in the Plan.

(b) Transferee Obligations. Each person (other than the Company) to whom Stock is transferred in accordance with Section 10.2(a) hereof must, as a condition precedent to the validity of such transfer, be required to acknowledge in writing to the Company that such person is bound by the provisions of this Section 10 to the same extent that such Stock would be so subject if retained by Participant.

11. INTERPRETATION. Any dispute regarding the interpretation of this Agreement shall be submitted by Participant or the Company to the Committee for review. The resolution of such a dispute by the Committee shall be final and binding on the Company and Participant.

12. ENTIRE AGREEMENT. The Plan is incorporated herein by reference. This Agreement and the Plan constitute the entire agreement of the parties and supersede all prior undertakings and agreements with respect to the subject matter hereof.

13. NOTICES. Any and all notices required or permitted to be given to a party pursuant to the provisions of this Agreement will be in writing and will be effective and deemed to provide such party sufficient notice under this Agreement on the earliest of the following: (i) at the time of personal delivery, if delivery is in person; (ii) at the time of transmission by facsimile, addressed to the other party at its facsimile number specified herein (or hereafter modified by subsequent notice to the parties hereto), with confirmation of receipt made by both telephone and printed confirmation sheet verifying successful transmission of the facsimile; (iii) one (1) business day after deposit with an express overnight courier for United States deliveries, or two (2) business days after such deposit for deliveries outside of the United States, with proof of delivery from the courier requested; or (iv) three (3) business days after deposit in the United States mail by certified mail (return receipt requested) for United States deliveries.

Any notice for delivery outside the United States will be sent by facsimile or by express courier. Any notice not delivered personally or by facsimile will be sent with postage and/or other charges prepaid and properly addressed to the party to be notified at the address or facsimile number set forth below the signature lines of this Agreement, or at such other address or facsimile number as such other party may designate by one of the indicated means of notice herein to the other parties hereto. Notices to the Company will be marked “Attention: General Counsel”. Notices by facsimile shall be machine verified as received.

14. SUCCESSORS AND ASSIGNS. The Company may assign any of its rights under this Agreement including its right to purchase Shares under the Right of First Refusal. This Agreement shall be binding upon and inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer set forth herein, this Agreement shall be binding upon Participant and Participant’s heirs, executors, administrators, legal representatives, successors and assigns.

15. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the laws of the State of California as such laws are applied to agreements between California residents entered into and to be performed entirely within California. If any provision of this Agreement is determined by a court of law to be illegal or unenforceable, then such provision will be enforced to the maximum extent possible and the other provisions will remain fully effective and enforceable.

16. ACCEPTANCE. Participant hereby acknowledges receipt of a copy of the Plan and this Agreement. Participant has read and understands the terms and provisions thereof, and accepts the Option subject to all the terms and conditions of the Plan and this Agreement. Participant acknowledges that there may be adverse tax consequences upon exercise of the Option or disposition of the Shares and that Participant should consult a tax adviser prior to such exercise or disposition.

17. FURTHER ASSURANCES. The parties agree to execute such further documents and instruments and to take such further actions as may be reasonably necessary to carry out the purposes and intent of this Agreement.

18. TITLES AND HEADINGS. The titles, captions and headings of this Agreement are included for ease of reference only and will be disregarded in interpreting or construing this Agreement. Unless otherwise specifically stated, all references herein to “sections” and “exhibits” will mean “sections” and “exhibits” to this Agreement.

19. COUNTERPARTS. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered will be deemed an original, and all of which together shall constitute one and the same agreement.

20. SEVERABILITY. If any provision of this Agreement is determined by any court or arbitrator of competent jurisdiction to be invalid, illegal or unenforceable in any respect, such provision will be enforced to the maximum extent possible given the intent of the parties hereto. If such clause or provision cannot be so enforced, such provision shall be stricken from this Agreement and the remainder of this Agreement shall be enforced as if such invalid, illegal or unenforceable clause or provision had (to the extent not enforceable) never been contained in this Agreement. Notwithstanding the forgoing, if the value of this Agreement based upon the substantial benefit of the bargain for any party is materially impaired, which determination as made by the presiding court or arbitrator of competent jurisdiction shall be binding, then both parties agree to substitute such provision(s) through good faith negotiations.

21. FACSIMILE SIGNATURES. This Agreement may be executed and delivered by facsimile and upon such delivery the facsimile signature will be deemed to have the same effect as if the original signature had been delivered to the other party.

IN WITNESS WHEREOF, the Company has caused this Stock Option Agreement to be executed in triplicate by its duly authorized representative and Participant has executed this Agreement in triplicate, effective as of the Date of Grant.


TWITTER, INC.

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PARTICIPANT


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This Stock Option Exercise Agreement (the “Exercise Agreement”) is made and entered into as of (the “Effective Date”) by and between Twitter, Inc., a Delaware corporation (the “Company”), and the purchaser named below (the “Purchaser”). Capitalized terms not defined herein shall have the meanings ascribed to them in the Company’s 2007 Equity Incentive Plan (the “Plan”).

1.1 Exercise. Pursuant to exercise of that certain option (the “Option”) granted to Purchaser under the Plan and subject to the terms and conditions of this Exercise

Agreement, Purchaser hereby purchases from the Company, and the Company hereby sells to Purchaser, the Total Number of Shares set forth above (the “Shares”) of the Company’s Common Stock, $0.000005 par value per share, at the Exercise Price Per Share set forth above (the “Exercise Price”). As used in this Exercise Agreement, the term “Shares” refers to the Shares purchased under this Exercise Agreement and includes all securities received (i) in replacement of the Shares, (ii) as a result of stock dividends or stock splits with respect to the Shares, and (iii) all securities received in replacement of the Shares in a merger, recapitalization, reorganization or similar corporate transaction.

1.2 Title to Shares. The exact spelling of the name(s) under which Purchaser will take title to the Shares is:

To assign the Shares to a trust, a stock transfer agreement in the form provided by the Company (the “Stock Transfer Agreement”) must be completed and executed.

1.3 Payment. Purchaser hereby delivers payment of the Exercise Price in the manner permitted in the Stock Option Agreement as follows (check and complete as appropriate):

2.1 Deliveries by Purchaser. Purchaser hereby delivers to the Company (i) this Exercise Agreement, (ii) two (2) copies of a blank Stock Power and Assignment Separate from Stock Certificate in the form of Exhibit 1 attached hereto (the “Stock Powers”), both executed by Purchaser (and Purchaser’s spouse, if any), (iii) if Purchaser is married, a Consent of Spouse in the form of Exhibit 2 attached hereto (the “Spouse Consent”) executed by Purchaser’s spouse, and (iv) the Exercise Price and payment or other provision for any applicable tax obligations in the form of “a check” a copy of which is attached hereto as Exhibit 3.

2.2 Deliveries by the Company. Upon its receipt of payment of the Exercise Price, payment for any applicable tax obligations and all the documents to be executed and delivered by Purchaser to the Company under Section 2.1, the Company will issue a duly executed stock certificate evidencing the Shares in the name of Purchaser to be placed in escrow as provided in Section 8.

3. REPRESENTATIONS AND WARRANTIES OF PURCHASER. Purchaser represents and warrants to the Company that:

3.1 Agreement to be Bound by the Bylaws. Purchaser agrees and acknowledges that the Shares shall be subject to the restrictions in Sections 9.7 and 9.8 of the Company’s Bylaws, as amended on December 16, 2008.

3.2 Agrees to Terms of the Plan. Purchaser has received a copy of the Plan and the Stock Option Agreement, has read and understands the terms of the Plan, the Stock Option Agreement and this Exercise Agreement, and agrees to be bound by their terms and conditions. Purchaser acknowledges that there may be adverse tax consequences upon exercise of the Option or disposition of the Shares, and that Purchaser should consult a tax adviser prior to such exercise or disposition.

3.3 Purchase for Own Account for Investment. Purchaser is purchasing the Shares for Purchaser’s own account for investment purposes only and not with a view to, or for sale in connection with, a distribution of the Shares within the meaning of the Securities Act. Purchaser has no present intention of selling or otherwise disposing of all or any portion of the Shares and no one other than Purchaser has any beneficial ownership of any of the Shares.

3.4 Access to Information. Purchaser has had access to all information regarding the Company and its present and prospective business, assets, liabilities and financial condition that Purchaser reasonably considers important in making the decision to purchase the Shares, and Purchaser has had ample opportunity to ask questions of the Company’s representatives concerning such matters and this investment.

3.5 Understanding of Risks. Purchaser is fully aware of: (i) the highly speculative nature of the investment in the Shares; (ii) the financial hazards involved; (iii) the lack of liquidity of the Shares and the restrictions on transferability of the Shares (e.g., that Purchaser may not be able to sell or dispose of the Shares or use them as collateral for loans); (iv) the qualifications and backgrounds of the management of the Company; and (v) the tax consequences of investment in the Shares. Purchaser is capable of evaluating the merits and risks of this investment, has the ability to protect Purchaser’s own interests in this transaction and is financially capable of bearing a total loss of this investment.

3.6 No General Solicitation. At no time was Purchaser presented with or solicited by any publicly issued or circulated newspaper, mail, radio, television or other form of general advertising or solicitation in connection with the offer, sale and purchase of the Shares.

4.1 Compliance with U.S. Federal Securities Laws. Purchaser understands and acknowledges that the Shares have not been registered with the SEC under the Securities Act and that, notwithstanding any other provision of the Stock Option Agreement to the contrary, the exercise of any rights to purchase any Shares is expressly conditioned upon compliance with the Securities Act and all applicable state securities laws. Purchaser agrees to cooperate with the Company to ensure compliance with such laws. The Shares are being issued under the Securities Act pursuant to the exemption provided by SEC Rule 701.

4.2 Compliance with California Securities Laws. THE PLAN, THE STOCK OPTION AGREEMENT, AND THIS EXERCISE AGREEMENT ARE INTENDED TO COMPLY WITH SECTION 25102(o) OF THE CALIFORNIA CORPORATIONS CODE AND ANY RULES (INCLUDING COMMISSIONER RULES, IF APPLICABLE) OR REGULATIONS PROMULGATED THEREUNDER BY THE CALIFORNIA DEPARTMENT OF CORPORATIONS (THE “REGULATIONS”). ANY PROVISION OF THIS EXERCISE AGREEMENT THAT IS INCONSISTENT WITH SECTION 25102(o) SHALL, WITHOUT FURTHER ACT OR AMENDMENT BY THE COMPANY OR THE BOARD, BE REFORMED TO COMPLY WITH THE REQUIREMENTS OF SECTION 25102(o). THE SALE OF THE SECURITIES THAT ARE THE SUBJECT OF THIS EXERCISE AGREEMENT, IF NOT YET QUALIFIED WITH THE CALIFORNIA COMMISSIONER OF CORPORATIONS AND NOT EXEMPT FROM SUCH QUALIFICATION, IS SUBJECT TO SUCH QUALIFICATION, AND THE ISSUANCE OF SUCH SECURITIES, AND THE RECEIPT OF ANY PART OF THE CONSIDERATION THEREFOR PRIOR TO SUCH QUALIFICATION IS UNLAWFUL UNLESS THE SALE IS EXEMPT. THE RIGHTS OF THE PARTIES TO THIS EXERCISE AGREEMENT ARE EXPRESSLY CONDITIONED UPON SUCH QUALIFICATION BEING OBTAINED OR AN EXEMPTION BEING AVAILABLE.

5.1 No Transfer Unless Registered or Exempt. Purchaser understands that Purchaser may not transfer any Shares unless such Shares are registered under the Securities Act or qualified under applicable state securities laws or unless, in the opinion of counsel to the Company, exemptions from such registration and qualification requirements are available. Purchaser understands that only the Company may file a registration statement with the SEC and that the Company is under no obligation to do so with respect to the Shares. Purchaser has also been advised that exemptions from registration and qualification may not be available or may not permit Purchaser to transfer all or any of the Shares in the amounts or at the times proposed by Purchaser.

5.2 SEC Rule 144. In addition, Purchaser has been advised that SEC Rule 144 promulgated under the Securities Act, which permits certain limited sales of unregistered securities, is not presently available with respect to the Shares and, in any event, requires that the Shares be held for a minimum of six (6) months, and in certain cases one (1)

year, after they have been purchased and paid for (within the meaning of Rule 144). Purchaser understands that Rule 144 may indefinitely restrict transfer of the Shares so long as Purchaser remains an “affiliate” of the Company or if “current public information” about the Company (as defined in Rule 144) is not publicly available.

6.1 Disposition of Shares. Purchaser hereby agrees that Purchaser shall make no disposition of the Shares (other than as permitted by this Exercise Agreement) unless and until:

(a) Purchaser shall have notified the Company of the proposed disposition and provided a written summary of the terms and conditions of the proposed disposition;

(b) Purchaser shall have complied with all requirements of this Exercise Agreement applicable to the disposition of the Shares;

(c) Purchaser shall have provided the Company with written assurances, in form and substance satisfactory to counsel for the Company, that (i) the proposed disposition does not require registration of the Shares under the Securities Act or (ii) all appropriate actions necessary for compliance with the registration requirements of the Securities Act or of any exemption from registration available under the Securities Act (including Rule 144) have been taken; and

(d) Purchaser shall have provided the Company with written assurances, in form and substance satisfactory to the Company, that the proposed disposition will not result in the contravention of any transfer restrictions applicable to the Shares pursuant to the provisions of the Regulations referred to in Section 4.2 hereof.

(a) Restrictions on Transfer; Twenty Percent Limitation. Without limitation of any other restriction on transfer set forth in this Exercise Agreement or the Plan, Purchaser shall be bound by each of the following restrictions:

(i) Purchaser shall not Transfer any Stock (aggregated on a cumulative basis together with all prior Transfers by Purchaser and its Permitted Transferees), in an amount that exceeds the Twenty Percent Limitation. The “Twenty Percent Limitation” as used in this Section 6.2(a) shall mean, for Purchaser, a Transfer (aggregated on a cumulative basis together with all prior Transfers by Purchaser and its Permitted Transferees) of up to an aggregate of twenty-percent (20%) of the Aggregate Stock that has ever been held by Purchaser (counting all shares held prior to the date hereof, now or hereafter, including shares previously or hereafter Transferred by Purchaser or its Permitted Transferees). “Aggregate Stock” means the maximum number of shares of Stock, including securities convertible into, exercisable for and otherwise exchangeable for such shares of Stock and for further clarity, (i) includes all Stock issuable pursuant to outstanding stock options held by Purchaser, (ii) excludes shares of Stock formerly issuable pursuant to options held by Purchaser that have been terminated or cancelled for more than ninety (90) days, and (iii) includes any shares of Stock previously or hereafter Transferred by Purchaser or its Permitted Transferees.

(ii) Purchaser shall not Transfer any Stock at any time to any Special Purpose Entity unless sales of Stock to such Special Purpose Entity have been approved by the Company’s Compensation Committee or Board of Directors.

(iii) Each Proposed Transferee shall agree, as a condition to any Transfer of Stock to such Proposed Transferee by Purchaser, to be bound by the restrictions set forth in the form stock transfer agreement provided by the Company as may be amended from time to time in the Company’s discretion, which shall include, among other provisions, a prohibition on subsequent sales of the Company’s securities by the Proposed Transferee until the closing of an IPO or the consummation of a Deemed Liquidation Event (including with respect to the shares of Stock proposed to be purchased by the Proposed Transferee and other securities of the Company held by the Proposed Transferee).

(iv) Purchaser shall comply with the Company’s Insider Trading Policy as may be adopted or amended from time to time by the Company’s Board of Directors (the “Insider Trading Policy”). To the extent Purchaser is not an employee of the Company, Purchaser shall comply with the Company’s Insider Trading Policy in the same manner as-if Purchaser were deemed an employee of the Company as defined in the Insider Trading Policy. Purchaser shall not Transfer any Stock at any time other than during trading windows as proscribed by the Company from time to time in accordance with the Insider Trading Policy.

(v) Purchaser may not list, sell or offer to sell or otherwise trade in Company securities on any private market place or securities exchange, including without limitation on SecondMarket or SharesPost (each, a “Private Market Exchange”), until such time that a court of competent jurisdiction or appropriate regulatory authority has issued a ruling or endorsed the activities of such Private Market Exchange as compliant with applicable securities law to the Company’s reasonable satisfaction.

(vi) Before Purchaser may Transfer any Stock to any person or entity engaged or planning to engage in activities competitive, either directly or indirectly, with the then current and proposed products and services of the Company, or any affiliate of such person or entity, as determined in good faith by the Company’s Board of Directors, Purchaser must obtain the prior written consent of the Company’s Board of Directors, which consent may be withheld in its sole discretion even if to do so would be deemed unreasonable.

(viii) To the extent any capitalized terms in this Section 6.2(a) are defined in Section 24 of the Plan, such definitions set forth in Section 24 shall control and govern over any conflicting definitions set forth in the Plan.

(b) Transferee Obligations. Each person (other than the Company) to whom Stock is transferred in accordance with Section 6.2(a) hereof must, as a condition precedent to the validity of such transfer, be required to acknowledge in writing to the Company that such person is bound by the provisions of this Section 6 to the same extent that such Stock or Shares would be so subject if retained by Purchaser.

6.3 Right of First Refusal. The Company and/or its assignee(s) shall have a right of first refusal (the “Right of First Refusal”) to purchase all Shares (the “Offer Shares”) that the Purchaser (or a subsequent transferee, either sometimes referred to herein as the “Holder”) may propose to transfer to a third party (including, without limitation, a transfer by gift or operation of law), unless otherwise not permitted by Section 25102(o) of the California Corporations Code, provided that such Right of First Refusal terminates upon the Company’s initial public offering of Common Stock pursuant to an effective registration statement filed under the Securities Act.

(a) Notice of Proposed Transfer. The Holder of the Offered Shares will deliver to the Company a written notice (the “Notice”) stating: (i) the Holder’s bona fide intention to sell or otherwise transfer the Offered Shares; (ii) the name and address of each proposed purchaser or other transferee (the “Proposed Transferee”); (iii) the number of Offered Shares to be transferred to each Proposed Transferee; (iv) the bona fide cash price or other consideration for which the Holder proposes to transfer the Offered Shares (the “Offered Price”); and (v) that the Holder acknowledges this Notice is an offer to sell the Offered Shares to the Company and/or its assignee(s) pursuant to the Company’s Right of First Refusal at the Offered Price as provided for in this Exercise Agreement.

(b) Exercise of Right of First Refusal. At any time within thirty (30) days after the date of the Notice, the Company and/or its assignee(s) may, by giving written notice to the Holder, elect to purchase all (or, with the consent of the Holder, less than all) the Offered Shares proposed to be transferred to any one or more of the Proposed Transferees named in the Notice, at the purchase price, determined as specified below.

(c) Purchase Price. The purchase price for the Offered Shares purchased under this Section 6 will be the Offered Price, provided that if the Offered Price consists of no legal consideration (as, for example, in the case of a transfer by gift) the purchase price will be the fair market value of the Offered Shares as determined in good faith by the Committee or the Board. If the Offered Price includes consideration other than cash, then the value of the non-cash consideration, as determined in good faith by the Committee or the Board, will conclusively be deemed to be the cash equivalent value of such non-cash consideration.

(d) Payment. Payment of the purchase price for the Offered Shares will be payable, at the option of the Company and/or its assignee(s) (as applicable), by check or by cancellation of all or a portion of any outstanding purchase money indebtedness owed by the Holder to the Company (or to such assignee, in the case of a purchase of Offered Shares by such assignee) or by any combination thereof. The purchase price will be paid without interest within sixty (60) days after the Company’s receipt of the Notice, or, at the option of the Company and/or its assignee(s), in the manner and at the time(s) set forth in the Notice.

(e) Holder’s Right to Transfer. If all of the Offered Shares proposed in the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this Section 6, then the Holder may sell or otherwise transfer such Offered Shares to each Proposed Transferee at the Offered Price or at a higher price, provided that (i) such sale or other transfer is consummated within one hundred twenty (120) days after the date of the Notice, (ii) any such sale or other transfer is effected in compliance with all applicable securities laws, and (iii) each Proposed Transferee agrees in writing that the provisions of this Section 6 will continue to apply to the Offered Shares in the hands of such Proposed Transferee. If the Offered Shares described in the Notice are not transferred to each Proposed Transferee within such one hundred twenty (120) day period, then a new Notice must be given to the Company pursuant to which the Company will again be offered the Right of First Refusal before any Shares held by the Holder may be sold or otherwise transferred.

(f) Exempt Transfers. Notwithstanding anything to the contrary in this Section 6, the following transfers of Shares will be exempt from the Right of First Refusal: (i) the transfer of any or all of the Shares during Purchaser’s lifetime by gift or on Purchaser’s death by will or intestacy to Purchaser’s “Immediate Family” (as defined below) or to a trust for the benefit of Purchaser or Purchaser’s Immediate Family, provided that each transferee or other recipient agrees in a writing satisfactory to the Company that the provisions of this Section 6 will continue to apply to the transferred Shares in the hands of such transferee or other recipient; (ii) any transfer or conversion of Shares made pursuant to a statutory merger or statutory consolidation of the Company with or into another corporation or corporations (except that the Right of First Refusal will continue to apply thereafter to such Shares, in which case the surviving corporation of such merger or consolidation shall succeed to the rights of the Company under this Section 6 unless (i) the common stock of the surviving corporation or any direct or indirect parent corporation thereof is registered under the Securities Exchange Act of 1934, as amended; or (ii) the agreement of merger or consolidation expressly otherwise provides; or (iii) any transfer of Shares pursuant to the winding up and dissolution of the Company. As used herein, the term “Immediate Family” will mean Purchaser’s spouse, the lineal descendant or antecedent, father, mother, brother or sister, child, adopted child, grandchild or adopted grandchild of the Purchaser or the Purchaser’s spouse, or the spouse of any of the above, or Spousal Equivalent, as defined herein. As used herein, a person is deemed to be a “Spousal Equivalent” provided the following circumstances are true: (i) irrespective of whether or not the Purchaser and the Spousal Equivalent are the same sex, they are the sole spousal equivalent of the other for the last twelve (12) months, (ii) they intend to remain so indefinitely, (iii) neither are married to anyone else, (iv) both are at least 18 years of age and mentally competent to consent to contract, (v) they are not related by blood to a degree of closeness that which would prohibit legal marriage in the state in which they legally reside, (vi) they are jointly responsible for each other’s common welfare and financial obligations, and (vii) they reside together in the same residence for the last twelve (12) months and intend to do so indefinitely.

(g) Termination of Right of First Refusal. The Right of First Refusal will terminate as to all Shares (i) on the effective date of the first sale of Common Stock of the Company to the general public pursuant to a registration statement filed with and declared effective by the SEC under the 1933 Act (other than a registration statement relating solely to the issuance of Common Stock pursuant to a business combination or an employee incentive or benefit plan) or (ii) on any transfer or conversion of Shares made pursuant to a statutory merger

or statutory consolidation of the Company with or into another corporation or corporations if the common stock of the surviving corporation or any direct or indirect parent corporation thereof is registered under the Securities Exchange Act of 1934, as amended.

6.4 Encumbrances on Shares. Purchaser may grant a lien or security interest in, or pledge, hypothecate or encumber Shares only if each party to whom such lien or security interest is granted, or to whom such pledge, hypothecation or other encumbrance is made, agrees in a writing satisfactory to the Company that: (i) such lien, security interest, pledge, hypothecation or encumbrance will not apply to such Shares after they are acquired by the Company and/or its assignees under this Section 6; and (ii) the provisions of this Section 6 will continue to apply to such Shares in the hands of such party and any transferee of such party.

7. MARKET STANDOFF AGREEMENT. Purchaser agrees in connection with any registration of the Company’s securities that, upon the request of the Company or the underwriters managing any public offering of the Company’s securities, Purchaser will not sell or otherwise dispose of any Shares without the prior written consent of the Company or such underwriters, as the case may be, for such period of time (not to exceed one hundred eighty (180) days) after the effective date of such registration requested by such managing underwriters and subject to all restrictions as the Company or the underwriters may specify. Purchaser further agrees to enter into any agreement reasonably required by the underwriters to implement the foregoing.

8. RIGHTS AS A STOCKHOLDER. Subject to the terms and conditions of this Exercise Agreement, Purchaser will have all of the rights of a stockholder of the Company with respect to the Shares from and after the date that Shares are issued to Purchaser until such time as Purchaser disposes of the Shares or the Company and/or its assignee(s) exercise(s) the Right of First Refusal. Upon an exercise of the Right of First Refusal, Purchaser will have no further rights as a holder of the Shares so purchased upon such exercise, other than the right to receive payment for the Shares so purchased in accordance with the provisions of this Exercise Agreement, and Purchaser will promptly surrender the stock certificate(s) evidencing the Shares so purchased to the Company for transfer or cancellation.

9. ESCROW. As security for Purchaser’s faithful performance of this Exercise Agreement, Purchaser agrees, immediately upon receipt of the stock certificate(s) evidencing the Shares, to deliver such certificate(s), together with the Stock Powers executed by Purchaser and by Purchaser’s spouse, if any (with the date and number of Shares left blank), to the Secretary of the Company or other designee of the Company (the “Escrow Holder”), who is hereby appointed to hold such certificate(s) and Stock Powers in escrow and to take all such actions and to effectuate all such transfers and/or releases of such Shares as are in accordance with the terms of this Exercise Agreement. Purchaser and the Company agree that Escrow Holder will not be liable to any party to this Exercise Agreement (or to any other party) for any actions or omissions unless Escrow Holder is grossly negligent or intentionally fraudulent in carrying out the duties of Escrow Holder under this Exercise Agreement. Escrow Holder may rely upon any letter, notice or other document executed with any signature purported to be genuine and may rely on the advice of counsel and obey any order of any court with respect to the transactions contemplated by this Exercise Agreement. The Shares will be released from escrow upon termination of the Right of First Refusal.

10.1 Legends. Purchaser understands and agrees that the Company will place the legends set forth below or similar legends on any stock certificate(s) evidencing the Shares, together with any other legends that may be required by state or U.S. Federal securities laws, the Company’s Certificate of Incorporation or Bylaws, any other agreement between Purchaser and the Company or any agreement between Purchaser and any third party:

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR UNDER THE SECURITIES LAWS OF CERTAIN STATES. THESE SECURITIES ARE SUBJECT TO RESTRICTIONS ON TRANSFERABILITY AND RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT AS PERMITTED UNDER THE ACT AND APPLICABLE STATE SECURITIES LAWS, PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM. INVESTORS SHOULD BE AWARE THAT THEY MAY BE REQUIRED TO BEAR THE FINANCIAL RISKS OF THIS INVESTMENT FOR AN INDEFINITE PERIOD OF TIME. THE ISSUER OF THESE SECURITIES MAY REQUIRE AN OPINION OF COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER TO THE EFFECT THAT ANY PROPOSED TRANSFER OR RESALE IS IN COMPLIANCE WITH THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON PUBLIC RESALE AND TRANSFER, INCLUDING THE RIGHT OF FIRST REFUSAL OPTIONS HELD BY THE ISSUER AND/OR ITS ASSIGNEE(S), AS SET FORTH IN A STOCK OPTION EXERCISE AGREEMENT BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER. SUCH PUBLIC SALE AND TRANSFER RESTRICTIONS, INCLUDING THE RIGHT OF FIRST REFUSAL, ARE BINDING ON TRANSFEREES OF THESE SHARES.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO A 180 DAY MARKET STANDOFF RESTRICTION AS SET FORTH IN A CERTAIN AGREEMENT BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER. AS A RESULT OF SUCH AGREEMENT, THESE SHARES MAY NOT BE TRADED PRIOR TO 180 DAYS AFTER THE EFFECTIVE DATE OF ANY PUBLIC OFFERING OF THE COMMON STOCK OF THE ISSUER HEREOF. SUCH RESTRICTION IS BINDING ON TRANSFEREES OF THESE SHARES.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO RESTRICTIONS ON TRANSFER CONTAINED IN THE BYLAWS OF THE COMPANY.

10.2 Stop-Transfer Instructions. Purchaser agrees that, to ensure compliance with the restrictions imposed by this Exercise Agreement, the Company may issue appropriate “stop-transfer” instructions to its transfer agent, if any, and if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records.

10.3 Refusal to Transfer. The Company will not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Exercise Agreement or (ii) to treat as owner of such Shares, or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares have been so transferred.

11. TAX CONSEQUENCES. PURCHASER UNDERSTANDS THAT PURCHASER MAY SUFFER ADVERSE TAX CONSEQUENCES AS A RESULT OF PURCHASER’S PURCHASE OR DISPOSITION OF THE SHARES. PURCHASER REPRESENTS: (i) THAT PURCHASER HAS CONSULTED WITH ANY TAX ADVISER THAT PURCHASER DEEMS ADVISABLE IN CONNECTION WITH THE PURCHASE OR DISPOSITION OF THE SHARES AND (ii) THAT PURCHASER IS NOT RELYING ON THE COMPANY FOR ANY TAX ADVICE. Set forth below is a brief summary as of the date the Plan was adopted by the Board of some of the U.S. Federal and California tax consequences of exercise of the Option and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. PURCHASER SHOULD CONSULT HIS OR HER OWN TAX ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES.

11.1 Exercise of Incentive Stock Option. If the Option qualifies as an ISO, there will be no regular U.S. Federal income tax liability or California income tax liability upon the exercise of the Option, although the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price will be treated as a tax preference item for U.S. Federal alternative minimum tax purposes and may subject Purchaser to the alternative minimum tax in the year of exercise.

11.2 Exercise of Nonqualified Stock Option. If the Option does not qualify as an ISO, there may be a regular U.S. Federal income tax liability and a California income tax liability upon the exercise of the Option. Purchaser will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price. If Purchaser is or was an employee of the Company, the Company may be required to withhold from Purchaser’s compensation or collect from Purchaser and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income at the time of exercise.

11.3 Disposition of Shares. The following tax consequences may apply upon disposition of the Shares.

(c) Withholding. The Company may be required to withhold from the Purchaser’s compensation or collect from the Purchaser and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income.

12. COMPLIANCE WITH LAWS AND REGULATIONS. The issuance and transfer of the Shares will be subject to and conditioned upon compliance by the Company and Purchaser with all applicable state and U.S. Federal laws and regulations and with all applicable requirements of any stock exchange or automated quotation system on which the Company’s Common Stock may be listed or quoted at the time of such issuance or transfer.

13. SUCCESSORS AND ASSIGNS. The Company may assign any of its rights under this Exercise Agreement, including its right to purchase Shares under the Right of First Refusal. No other party to this Exercise Agreement may assign, whether voluntarily or by operation of law, any of its rights and obligations under this Exercise Agreement, except with the prior written consent of the Company. This Exercise Agreement shall be binding upon and inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer herein set forth, this Exercise Agreement will be binding upon Purchaser and Purchaser’s heirs, executors, administrators, legal representatives, successors and assigns.

14. GOVERNING LAW; SEVERABILITY. This Exercise Agreement shall be governed by and construed in accordance with the internal laws of the State of California as such laws are applied to agreements between California residents entered into and to be performed entirely within California. If any provision of this Exercise Agreement is determined by a court of law to be illegal or unenforceable, then such provision will be enforced to the maximum extent possible and the other provisions will remain fully effective and enforceable.

15. NOTICES. Any and all notices required or permitted to be given to a party pursuant to the provisions of this Exercise Agreement will be in writing and will be effective and deemed to provide such party sufficient notice under this Exercise Agreement on the earliest of the following: (i) at the time of personal delivery, if delivery is in person; (ii) at the time of transmission by facsimile, addressed to the other party at its facsimile number specified herein (or hereafter modified by subsequent notice to the parties hereto), with confirmation of receipt made by both telephone and printed confirmation sheet verifying successful transmission of the facsimile; (iii) one (1) business day after deposit with an express overnight courier for United States deliveries, or two (2) business days after such deposit for deliveries outside of the United States, with proof of delivery from the courier requested; or (iv) three (3) business days after deposit in the United States mail by certified mail (return receipt requested) for United States deliveries.

Any notice for delivery outside the United States will be sent by facsimile or by express courier. Any notice not delivered personally or by facsimile will be sent with postage and/or other charges prepaid and properly addressed to the party to be notified at the address or facsimile number set forth below the signature lines of this Exercise Agreement, or at such other address or facsimile number as such other party may designate by one of the indicated means of notice herein to the other parties hereto. Notices to the Company will be marked “Attention: President”. Notices by facsimile shall be machine verified as received.

16. FURTHER INSTRUMENTS. The parties agree to execute such further instruments and to take such further action as may be reasonably necessary to carry out the purposes and intent of this Exercise Agreement.

17. HEADINGS. The captions and headings of this Exercise Agreement are included for ease of reference only and will be disregarded in interpreting or construing this Exercise Agreement. All references herein to Sections will refer to Sections of this Exercise Agreement.

18. ENTIRE AGREEMENT. The Plan, the Stock Option Agreement and this Exercise Agreement, together with all Exhibits thereto, constitute the entire agreement and understanding of the parties with respect to the subject matter of this Exercise Agreement, and supersede all prior understandings and agreements, whether oral or written, between the parties hereto with respect to the specific subject matter hereof.

20. COUNTERPARTS. This Exercise Agreement may be executed in any number of counterparts, each of which when so executed and delivered will be deemed an original, and all of which together shall constitute one and the same agreement.

21. SEVERABILITY. If any provision of this Exercise Agreement is determined by any court or arbitrator of competent jurisdiction to be invalid, illegal or unenforceable in any respect, such provision will be enforced to the maximum extent possible given the intent of the parties hereto. If such clause or provision cannot be so enforced, such provision shall be stricken from this Exercise Agreement and the remainder of this Exercise Agreement shall be enforced as if such invalid, illegal or unenforceable clause or provision had (to the extent not enforceable) never been contained in this Exercise Agreement. Notwithstanding the forgoing, if the value of this Exercise Agreement based upon the substantial benefit of the bargain for any party is materially impaired, which determination as made by the presiding court or arbitrator of competent jurisdiction shall be binding, then both parties agree to substitute such provision(s) through good faith negotiations.

22. FACSIMILE SIGNATURES. This Exercise Agreement may be executed and delivered by facsimile and upon such delivery the facsimile signature will be deemed to have the same effect as if the original signature had been delivered to the other party.

IN WITNESS WHEREOF, the Company has caused this Stock Option Exercise Agreement to be executed in triplicate by its duly authorized representative and Purchaser has executed this Stock Option Exercise Agreement in triplicate as of the Effective Date, indicated above.


TWITTER, INC.

By:





(Please print name)


(Please print title)



Address:



Fax No.:



Phone No.:


PURCHASER

Signature


(Please print name)



Address:



Fax No.:



Phone No.:



Email Address:

FOR VALUE RECEIVED and pursuant to that certain Stock Option Exercise Agreement No. [TO BE COMPLETED AT THE TIME OF TRANSFER] dated as of , , [TO BE COMPLETED AT THE TIME OF TRANSFER] (the “Agreement”), the undersigned hereby sells, assigns and transfers unto , shares of the Common Stock $0.000005, par value per share, of Twitter, Inc., a Delaware corporation (the “Company”), standing in the undersigned’s name on the books of the Company represented by Certificate No(s). [TO BE COMPLETED AT THE TIME OF TRANSFER] delivered herewith, and does hereby irrevocably constitute and appoint the Secretary of the Company as the undersigned’s attorney-in-fact, with full power of substitution, to transfer said stock on the books of the Company. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT AND ANY EXHIBITS THERETO.

PURCHASER

(Signature)

(Please Print Name)

(Spouse’s Signature, if any)

(Please Print Spouse’s Name)

¨ If Purchaser is not married, check this box.

Instructions to Purchaser: Please do not fill in any blanks other than the signature line. The purpose of this Stock Power and Assignment is to enable the Company to acquire the shares and to exercise its “Right of First Refusal” set forth in the Exercise Agreement and the Company’s Bylaws without requiring additional signatures on the part of the Purchaser or Purchaser’s Spouse.

PURCHASER

(Signature)

(Please Print Name)

(Spouse’s Signature, if any)

(Please Print Spouse’s Name)

¨ If Purchaser is not married, check this box.

The undersigned spouse of (the “Purchaser”) has read, understands, and hereby approves the Stock Option Exercise Agreement between Purchaser and the Company (the “Agreement”). In consideration of the Company’s granting my spouse the right to purchase the Shares as set forth in the Agreement, the undersigned hereby agrees to be irrevocably bound by the Agreement and further agrees that any community property interest I may have in the Shares shall similarly be bound by the Agreement. The undersigned hereby appoints Purchaser as my attorney-in-fact with respect to any amendment or exercise of any rights under the Agreement.

Print Name of Purchaser’s Spouse

Signature of Purchaser’s Spouse

If Purchaser is not married:

¨ Check this box and sign below.

Signature of Purchaser

Terms defined in the Company’s 2007 Equity Incentive Plan (the “Plan”) shall have the same meanings in this Notice of Restricted Stock Unit Award (“Notice of Grant”).

You (“Participant”) have been granted an award of Restricted Stock Units (“RSUs”), subject to the terms and conditions of the Plan and the attached Restricted Stock Unit Agreement (hereinafter “RSU Agreement”) under the Plan, as follows:

Vesting: [Insert vesting schedule]. If application of a vesting percentage would cause vesting of a fractional share, then such vesting shall be rounded down to the nearest whole share and shall cumulate with any other fractional shares and such fractions shall vest as they aggregate into a whole share of Stock.

Settlement: RSUs that vest as of the Initial Vesting Event or any Subsequent Vesting Event as set forth above shall be settled as soon as administratively practicable following the occurrence of such Initial Vesting Event or Subsequent Vesting Event, as applicable, but in no event later than the fifteenth (15th) day of the third (3rd) month following the end of the calendar year, or if later, the end of the Company’s tax year, in either case that includes such Initial Vesting Event or Subsequent Vesting Event, as applicable. Settlement means the delivery of the Stock vested under an RSU. Settlement of RSUs on the Initial Vesting Event or any Subsequent Vesting Event shall be in Stock unless at the time of settlement the Administrator, in its sole discretion, determines that settlement shall, in whole or in part, be in the form of cash. Settlement of vested RSUs shall occur whether or not Participant is in Continuous Service Status at the time of settlement.

Participant understands that his or her employment or consulting relationship with the Company is for an unspecified duration, can be terminated at any time (i.e., is “at-will”), and that nothing in this Notice of Grant, the RSU Agreement or the Plan changes the at-will nature of that relationship. Participant acknowledges that the vesting of the RSUs pursuant to this Notice of Grant is conditioned on the occurrence of an Initial Vesting Event or a Subsequent Vesting Event.

By your signature and the signature of the Company’s representative on the Notice of Grant, you and the Company agree that this RSU is granted under and governed by the terms and conditions of the Plan, the Notice of Grant and the RSU Agreement. By your signature, you consent to electronic delivery as set forth in Section 18 of the RSU Agreement.

Unless otherwise defined herein, the terms defined in the Company’s 2007 Equity Incentive Plan (the “Plan”) shall have the same defined meanings in this Restricted Stock Unit Agreement (the “Agreement”).

You have been granted Restricted Stock Units (“RSUs”) subject to the terms, restrictions and conditions of the Plan, the Notice of Restricted Stock Unit Grant (“Notice of Grant”) and this Agreement.

1. No Stockholder Rights. Unless and until such time as shares of Stock are issued in settlement of vested RSUs, Participant shall have no ownership of the Stock allocated to the RSUs and shall have no right to dividends or to vote such Stock.

2. Dividend Equivalents. Cash dividends, if any, shall not be credited to Participant.

3. No Transfer. The RSUs and any interest therein shall not be sold, assigned, transferred, pledged, hypothecated, or otherwise disposed of, other than by will or by the laws of descent and distribution. Notwithstanding the foregoing, Participant may, in the manner established by the Committee, designate a beneficiary or beneficiaries to exercise the rights of Participant and receive any property distributable with respect to the RSUs upon the death of Participant. Any transferee who receives an interest in the RSU or the underlying Stock upon the death of Participant shall acknowledge in writing that the RSU shall continue to be subject to the restrictions set forth in this Section 3.

4. Termination. If Participant’s Continuous Service Status terminates for any reason, all RSUs for which vesting is no longer possible under the terms of the Notice of Grant and this Agreement shall be forfeited to the Company forthwith, and all rights of Participant to such RSUs shall immediately terminate. If Participant’s Continuous Service Status terminates prior to the Initial Vesting Event, then all RSUs awarded in this Notice of Grant and this Agreement shall be forfeited to the Company forthwith, and all rights of Participant to such RSUs shall immediately terminate. In case of any dispute as to whether such termination has occurred, the Administrator shall have sole discretion to determine whether such termination has occurred and the effective date of such termination.

5. Acknowledgement. The Company and Participant agree that the RSUs are granted under and governed by the Notice of Grant, this Agreement and by the provisions of the Plan (incorporated herein by reference). Participant: (i) acknowledges receipt of a copy of each of the foregoing documents, (ii) represents that Participant has carefully read and is familiar with their provisions, and (iii) hereby accepts the RSUs subject to all of the terms and conditions set forth herein and those set forth in the Plan and the Notice of Grant.

6. Limitations on Transfer of Stock. In addition to any other limitation on transfer created by applicable securities laws, Participant shall not assign, encumber or dispose of any interest in the Stock issued pursuant to this Restricted Stock Unit Agreement except with the Company’s prior written consent and in compliance with the provisions of Article 12 of the Plan, the Company’s then current Insider Trading Policy, and applicable securities laws. In addition to any other limitation on transfer created by applicable securities laws, consistent with the Company’s Bylaws, Participant shall not assign, encumber or dispose of any interest in the shares of Stock issued pursuant to this Restricted Stock Unit Agreement except with the Company’s prior written consent and in compliance with the provisions below, the Company’s then current Insider Trading Policy, and applicable securities laws. The restrictions on transfer also include a prohibition on any short position, any “put equivalent position” or any “call equivalent position” by the RSU holder with respect to the RSU itself as well as any shares issuable upon settlement of the RSU prior to the settlement thereof until the Company becomes subject to the reporting

requirements of Section 13 or 15(d) of the Exchange Act. For purposes of Section 12.3(a) of the Plan and the Company’s Insider Trading Policy and the definition of “Twenty Percent Limitation” contained therein, the Participant agrees that shares of Stock subject to this RSU are not considered stock held by the Participant and shall not be included in calculating the Participant’s Aggregate Stock prior to settlement.

7. Restrictions Binding on Transferees. All transferees of shares of Stock or any interest therein will receive and hold such shares or interest subject to the provisions of this Agreement, including the transfer restrictions of Sections 3 and 6, and the transferee shall acknowledge such restrictions in writing. Any sale or transfer of the shares of Stock shall be void unless the provisions of this Agreement are satisfied.

8. Withholding of Tax. When the RSUs are vested and/or settled the fair market value of the Stock is treated as income subject to withholding by the Company for income and employment taxes if Participant is or was an employee of the Company. The Company shall withhold an amount equal to the tax due at vesting and/or settlement from the Participant’s other compensation or require Participant to remit to the Company an amount equal to the tax then due. In its sole discretion, the Company may instead withhold a number of shares of Stock with a fair market value (determined on the date the shares of Stock are settled) equal to the minimum amount the Company is then required to withhold for taxes.

9. Code Section 409A. For purposes of this Agreement, a termination of employment will be determined consistent with the rules relating to a “separation from service” as defined in Section 409A of the Code and the regulations thereunder (“Section 409A”). Notwithstanding anything else provided herein, to the extent any payments provided under this Agreement in connection with Participant’s termination of employment constitute deferred compensation subject to Section 409A, and Participant is deemed at the time of such termination of employment to be a “specified employee” under Section 409A, then such payment shall not be made or commence until the earlier of (i) the expiration of the 6-month period measured from Participant’s separation from service from the Company or (ii) the date of Participant’s death following such a separation from service; provided, however, that such deferral shall only be effected to the extent required to avoid adverse tax treatment to Participant including, without limitation, the additional tax for which Participant would otherwise be liable under Section 409A(a)(1)(B) in the absence of such a deferral. The first payment thereof will include a catch-up payment covering the amount that would have otherwise been paid during the period between Participant’s termination of employment and the first payment date but for the application of this provision, and the balance of the installments (if any) will be payable in accordance with their original schedule. To the extent that any provision of this Agreement is ambiguous as to its compliance with Section 409A, the provision will be read in such a manner so that all payments hereunder comply with Section 409A. To the extent any payment under this Agreement may be classified as a “short-term deferral” within the meaning of Section 409A, such payment shall be deemed a short-term deferral, even if it may also qualify for an exemption from Section 409A under another provision of Section 409A. Payments pursuant to this section are intended to constitute separate payments for purposes of Section 1.409A-2(b)(2) of the Treasury Regulations.

10. U.S. Tax Consequences. Participant acknowledges that there will be tax consequences upon vesting and/or settlement of the RSUs and/or disposition of the Stock, if any, received in connection therewith, and Participant should consult a tax adviser regarding Participant’s tax obligations prior to such settlement or disposition.

11. Compliance with Laws and Regulations. The issuance of Stock will be subject to and conditioned upon compliance by the Company and Participant (including any written representations, warranties and agreements as the Administrator may request of Participant for compliance with Applicable Laws) with all applicable state and federal laws and regulations and with all applicable requirements of any stock exchange or automated quotation system on which the Company’s Common Stock may be listed or quoted at the time of such issuance or transfer.

12. Legend on Certificates. The certificates representing the Stock issued hereunder shall be subject to such stop transfer orders and other restrictions as the Administrator may deem advisable under the Plan, this Agreement or the rules, regulations, and other requirements of the Securities and Exchange Commission, any stock exchange upon which such shares of Stock are listed, and any applicable Federal or state laws, and the Administrator may cause a legend or legends to be put on any such certificates to make appropriate reference to such restrictions.

13. Successors and Assigns. The Company may assign any of its rights under this Agreement. This Agreement shall be binding upon and inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer set forth herein, this Agreement will be binding upon Participant and Participant’s heirs, executors, administrators, legal representatives, successors and assigns.

14. Entire Agreement; Severability. The Plan and Notice of Grant are incorporated herein by reference. The Plan, the Notice of Grant and this Agreement constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Company and Participant with respect to the subject matter hereof (including, without limitation, any commitment to make any other form of equity award (such as stock options) that may have been set forth in any employment offer letter or other agreement between the parties). If any provision of this Agreement is determined by a court of law to be illegal or unenforceable, then such provision will be enforced to the maximum extent possible and the other provisions will remain fully effective and enforceable.

15. Market Standoff Agreement. Participant agrees that in connection with any registration of the Company’s securities that, upon the request of the Company or the underwriters managing any public offering of the Company’s securities, Participant will not sell or otherwise dispose of any Stock without the prior written consent of the Company or such underwriters, as the case may be, for such reasonable period of time after the effective date of such registration as may be requested by such managing underwriters and subject to all restrictions as the Company or the underwriters may specify. Participant will enter into any agreement reasonably required by the underwriters to implement the foregoing.

16. No Rights as Employee, Director or Consultant. Nothing in this Agreement shall affect in any manner whatsoever the right or power of the Company, or a Parent or Subsidiary of the Company, to terminate Participant^’s Continuous Service Status, for any reason, with or without cause.

17. Information to Participants. If the Company is relying on an exemption from registration under Section 12(h)-1 of the Exchange Act and such information is required to be provided by such Section 12(h)-1, the Company shall provide the information described in Rules 701(e)(3), (4), and (5) of the Securities Act by a method allowed under Section 12(h)-1 of the Exchange Act in accordance with Section 12(h)-1 of the Exchange Act, provided that Participant agrees to keep the information confidential.

18. Consent to Electronic Delivery of All Plan Documents and Disclosures. The Notice of Grant, RSU Agreement, Plan, 701 Disclosures, account statements, Plan prospectus and U.S. financial reports of the Company, or other communications or information related to the RSU and Stock issued under this RSU, may be delivered to the Participant electronically. Electronic delivery may include the delivery of a link to a Company intranet or the internet site of a third party involved in administering the Plan, the delivery of the document via e-mail or such other delivery determined at the Company’s discretion. By Participant’s acceptance of this RSU award, Participant consents to the electronic delivery of all Plan documents, award agreements, account statements and SEC-mandated disclosures in connection with any equity award under the Plan. Participant acknowledges that Participant may receive from the Company a paper copy of any documents delivered electronically at no cost if Participant contacts the Company by telephone, through a postal service or electronic mail at equity@twitter.com. Participant further acknowledges that Participant will be provided with a paper copy of any documents delivered

electronically if electronic delivery fails; similarly, Participant understands that Participant must provide the Company or any designated third party with a paper copy of any documents delivered electronically on request if electronic delivery fails. Also, Participant understands that Participant’s consent may be revoked or changed, including any change in the electronic mail address to which documents are delivered (if Participant has provided an electronic mail address), at any time by notifying the Company of such revised or revoked consent by telephone, postal service or electronic mail at equity@twitter.com. Finally, Participant understands that Participant is not required to consent to electronic delivery.

19. Assumption or Replacement of Awards by Successor or Acquiring Company. The last sentence of Section 18.1 of the Plan shall read as follows: In the event such successor or acquiring corporation (if any) does not assume, convert, replace or substitute this RSU, as provided above, pursuant to a transaction described in this Section 18.1, then notwithstanding any other provision in this Plan to the contrary, the vesting of such Awards will accelerate in full.

This Restricted Stock Purchase Agreement (this “Agreement”) is made and entered into as of , (the “Effective Date”) by and between Twitter, Inc. (the “Company”), a Delaware corporation, and (the “Purchaser”).

1. PURCHASE OF SHARES. On the Effective Date and subject to the terms and conditions of this Agreement, Purchaser hereby purchases from the Company, and Company hereby sells to Purchaser, an aggregate of shares of the Company’s Common Stock, $0.000005 par value per share (the “Shares”) at an aggregate purchase price of $ (the “Purchase Price”) or $ per Share (the “Purchase Price Per Share”). As used in this Agreement, the term “Shares” refers to the Shares purchased under this Agreement and includes all securities received (a) in substitution of the Shares, (b) as a result of stock dividends or stock splits with respect to the Shares, and (c) in replacement of the Shares in a merger, recapitalization, reorganization or similar corporate transaction.

2.1 Deliveries by Purchaser. Purchaser hereby delivers to the Company: (a) a duly executed copy of this Agreement, (b) two (2) copies of a blank Stock Power and Assignment Separate from Stock Certificate in the form of Exhibit 1 attached hereto (the “Stock Powers”), both executed by Purchaser (and Purchaser’s spouse, if any), (c) if Purchaser is married, a Spouse Consent in the form of Exhibit 2 attached hereto (the “Spouse Consent”) duly executed by Purchaser’s spouse, and (d) payment of the Purchase Price in cash, by check, a copy of which is attached hereto as Exhibit 4.

2.2 Deliveries by the Company. Upon its receipt of the entire Purchase Price and all the documents to be executed and delivered by Purchaser to the Company under Section 2.1, the Company will issue a duly executed stock certificate evidencing the Shares in the name of Purchaser, registered in Purchaser’s name, with such certificate to be placed in escrow as provided in Section 8 until expiration or termination of both the Company’s Right of First Refusal and Repurchase Option and described in Sections 5 and 6.

3. REPRESENTATIONS AND WARRANTIES OF PURCHASER. Purchaser hereby represents and warrants to the Company as follows.

3.1 Purchase for Own Account for Investment. Purchaser is purchasing the Shares for Purchaser’s own account for investment purposes only and not with a view to, or for sale in connection with, a distribution of the Shares within the meaning of the Securities Act of 1933, as amended (the “1933 Act”). Purchaser has no present intention of selling or otherwise disposing of all or any portion of the Shares and no one other than Purchaser has any beneficial ownership of any of the Shares.

3.2 Access to Information. Purchaser has had access to all information regarding the Company and its present and prospective business, assets, liabilities and financial condition that Purchaser reasonably considers important in making the decision to purchase the Shares, and Purchaser has had ample opportunity to ask questions of the Company’s representatives concerning such matters and this investment.

3.3 Understanding of Risks. Purchaser is fully aware of: (a) the highly speculative nature of the investment in the Shares; (b) the financial hazards involved; (c) the lack of liquidity of the Shares and the restrictions on transferability of the Shares (e.g., that Purchaser may not be able to sell or dispose of the Shares or use them as collateral for loans); (d) the qualifications and backgrounds of the management of the Company; and (e) the tax consequences of investment in the Shares.

3.4 Purchaser’s Qualifications. Purchaser has a preexisting personal or business relationship with the Company and/or certain of its officers and/or directors of a nature and duration sufficient to make Purchaser aware of the character, business acumen and general business and financial circumstances of the Company and/or such officers and directors. By reason of Purchaser’s business or financial experience, Purchaser is capable of evaluating the merits and risks of this investment, has the ability to protect Purchaser’s own interests in this transaction and is financially capable of bearing a total loss of this investment.

3.5 No General Solicitation. At no time was Purchaser presented with or solicited by any publicly issued or circulated newspaper, mail, radio, television or other form of general advertising or solicitation in connection with the offer, sale and purchase of the Shares.

3.6 Compliance with Securities Laws. Purchaser understands and acknowledges that, in reliance upon the representations and warranties made by Purchaser herein, the Shares are not being registered with the Securities and Exchange Commission (“SEC”) under the 1933 Act or being qualified under the California Corporate Securities Law of 1968, as amended (the “Law”), but instead are being issued under an exemption or exemptions from the registration and qualification requirements of the 1933 Act and the Law or other applicable state securities laws which impose certain restrictions on Purchaser’s ability to transfer the Shares.

3.7 Restrictions on Transfer. Purchaser understands that Purchaser may not transfer any Shares unless such Shares are registered under the 1933 Act and qualified under the Law or other applicable state securities laws or unless, in the opinion of counsel to the Company, exemptions from such registration and qualification requirements are available. Purchaser understands that only the Company may file a registration statement with the SEC or the California Commissioner of Corporations or other applicable state securities commissioners and that the Company is under no obligation to do so with respect to the Shares. Purchaser has also been advised that exemptions from registration and qualification may not be available or may not permit Purchaser to transfer all or any of the Shares in the amounts or at the times proposed by Purchaser.

3.8 Rule 144. In addition, Purchaser has been advised that SEC Rule 144 promulgated under the 1933 Act, which permits certain limited sales of unregistered securities, is not presently available with respect to the Shares and, in any event, requires that the Shares be held for a

minimum of six (6) months, and in certain cases one (1) year, after they have been purchased and paid for (within the meaning of Rule 144), before they may be resold under Rule 144. Purchaser understands that Rule 144 may indefinitely restrict transfer of the Shares so long as Purchaser remains an “affiliate” of the Company and “current public information” about the Company (as defined in Rule 144) is not publicly available.

4. MARKET STANDOFF AGREEMENT. Purchaser agrees in connection with any registration of the Company’s securities under the 1933 Act that, upon the request of the Company or the underwriters managing any registered public offering of the Company’s securities, Purchaser will not sell or otherwise dispose of any Shares without the prior written consent of the Company or such underwriters, as the case may be, for such period of time (not to exceed one hundred eighty (180) days) after the effective date of such registration requested by such managing underwriters and subject to all restrictions as the Company or the managing underwriters may specify for employee-shareholders generally. Purchaser further agrees to enter into any agreement reasonably required by the underwriters to implement the foregoing.

5. RIGHT OF FIRST REFUSAL. Unvested Shares (defined in Section 6.2 below) may not be sold or otherwise transferred by Purchaser without the Company’s prior written consent. Before any Vested Shares held by Purchaser or any transferee of such Vested Shares (either sometimes referred to herein as the “Holder”) may be sold or otherwise transferred (including without limitation a transfer by gift or operation of law), the Company and/or its assignee(s) will have a right of first refusal to purchase the Shares to be sold or transferred (the “Offered Shares”) on the terms and conditions set forth in this Section (the “Right of First Refusal”).

5.1 Notice of Proposed Transfer. The Holder of the Offered Shares will deliver to the Company a written notice (the “Notice”) stating: (a) the Holder’s bona fide intention to sell or otherwise transfer the Offered Shares; (b) the name and address of each proposed purchaser or other transferee (the “Proposed Transferee”); (c) the number of Offered Shares to be transferred to each Proposed Transferee; (d) the bona fide cash price or other consideration for which the Holder proposes to transfer the Offered Shares (the “Offered Price”); and (e) that the Holder acknowledges this Notice is an offer to sell the Offered Shares to the Company and/or its assignee(s) pursuant to the Company’s Right of First Refusal at the Offered Price as provided for in this Agreement.

5.2 Exercise of Right of First Refusal. At any time within thirty (30) days after the date of the Notice, the Company and/or its assignee(s) may, by giving written notice to the Holder, elect to purchase all (or, with the consent of the Holder, less than all) the Offered Shares proposed to be transferred to any one or more of the Proposed Transferees named in the Notice, at the purchase price determined in accordance with Section 5.3 below.

5.3 Purchase Price. The purchase price for the Offered Shares purchased under this Section will be the Offered Price, provided that if the Offered Price consists of no legal consideration (as, for example, in the case of a transfer by gift), the purchase price will be the fair market value of the Offered Shares as determined in good faith by the Company’s Board of Directors. If the Offered Price includes consideration other than cash, then the value of the non-cash consideration, as determined in good faith by the Company’s Board of Directors, will conclusively be deemed to be the cash equivalent value of such non-cash consideration.

5.4 Payment. Payment of the purchase price for the Offered Shares will be payable, at the option of the Company and/or its assignee(s) (as applicable), by check or by cancellation of all or a portion of any outstanding indebtedness owed by the Holder to the Company (or to such assignee, in the case of a purchase of Offered Shares by such assignee) or by any combination thereof The purchase price will be paid without interest within sixty (60) days after the Company’s receipt of the Notice, or, at the option of the Company and/or its assignee(s), in the manner and at the time(s) set forth in the Notice.

5.5 Holder’s Right to Transfer. If all of the Offered Shares proposed in the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this Section, then the Holder may sell or otherwise transfer such Offered Shares to each Proposed Transferee at the Offered Price or at a higher price, provided that (a) such sale or other transfer is consummated within one hundred twenty (120) days after the date of the Notice, (b) any such sale or other transfer is effected in compliance with all applicable securities laws, and (c) each Proposed Transferee agrees in writing that the provisions of this Section will continue to apply to the Offered Shares in the hands of such Proposed Transferee. If the Offered Shares described in the Notice are not transferred to each Proposed Transferee within such one hundred twenty (120) day period, then a new Notice must be given to the Company, pursuant to which the Company will again be offered the Right of First Refusal before any Shares held by the Holder may be sold or otherwise transferred.

5.6 Exempt Transfers. Notwithstanding anything to the contrary in this Section, the following transfers of Vested Shares will be exempt from the Right of First Refusal: (a) the transfer of any or all of the Vested Shares during Purchaser’s lifetime by gift or on Purchaser’s death by will or intestacy to Purchaser’s “Immediate Family” (as defined below) or to a trust for the benefit of Purchaser or Purchaser’s Immediate Family, provided that each transferee or other recipient agrees in a writing satisfactory to the Company that the provisions of this Section will continue to apply to the transferred Vested Shares in the hands of such transferee or other recipient; (b) except as provided in Section 5.7 clause (b) below, any transfer or conversion of Vested Shares made pursuant to a statutory merger or statutory consolidation of the Company with or into another corporation or corporations; or (c) any transfer of Vested Shares pursuant to the winding up and dissolution of the Company. As used herein, the term “Immediate Family” will mean Purchaser’s spouse, the lineal descendant or antecedent, brother or sister, of Purchaser or Purchaser’s spouse, or the spouse of any lineal descendant or antecedent, brother or sister of Purchaser, or Purchaser’s spouse, whether or not any of the above are adopted.

5.7 Termination of Right of First Refusal. The Right of First Refusal will terminate as to all Shares (a) on the effective date of the first sale of Common Stock of the Company to the general public pursuant to a registration statement filed with and declared effective by the SEC under the 1933 Act (other than a registration statement relating solely to the issuance of Common Stock pursuant to a business combination or an employee incentive or benefit plan) or (b) on any transfer or conversion of Shares made pursuant to a statutory merger or statutory consolidation of the Company with or into another corporation or corporations if the common stock of the surviving corporation or any direct or indirect parent corporation thereof is registered under the Securities Exchange Act of 1934, as amended.

6. COMPANY’S REPURCHASE OPTION. The Company or its assignees shall have the option to repurchase all or a portion of the Unvested Shares (defined in Section 6.2 below) on the terms and conditions set forth in this Section (the “Repurchase Option”) if Purchaser ceases to be employed by the Company (as defined herein) for any reason, or no reason, including without limitation Purchaser’s death, disability, voluntary resignation or termination by the Company with or without Cause.

6.1 Definition of “Employed by the Company;” “Termination Date”. For purposes of this Agreement, Purchaser will be considered to be “employed by the Company” if Purchaser is rendering substantial services as an officer, employee, consultant or independent contractor to the Company or to any parent, subsidiary or affiliate of the Company. The effective date on which Purchaser’s employment terminated shall be the “Termination Date”.

6.2 Unvested and Vested Shares. Shares that are vested pursuant to the schedule set forth herein are “Vested Shares”. Shares that are not vested pursuant to the schedule set forth herein are “Unvested Shares”. Unvested Shares may not be sold or otherwise transferred by Purchaser without the Company’s prior written consent. On the Effective Date all of the Shares will be Unvested Shares. If Purchaser has continuously been employed by the Company or any subsidiary or parent entity of the Company, [insert vesting schedule]. No Shares will become Vested Shares after the Termination Date. If the application of the vesting percentage results in a fractional share, such share shall be rounded down to the nearest whole share for each month except for the last month in such vesting period, at the end of which last month the balance of Unvested Shares shall become fully Vested Shares.

6.3 Acceleration of Vesting. Notwithstanding any other provisions of this Agreement, (i) upon a Change of Control (as hereinafter defined) following the Effective Date, [insert acceleration of vesting terms].

“Change of Control” shall mean: (i) the consummation of a merger or consolidation of the Company with or into another entity or any other corporate reorganization, if persons who were not majority stockholders of the Company immediately prior to such merger, consolidation or other reorganization own immediately after such merger, consolidation or other reorganization 50% or more of the voting power of the outstanding securities of each of (A) the continuing or surviving corporation and (B) any direct or indirect parent corporation of such continuing or surviving entity; or (ii) the sale, transfer, or other disposition of all or substantially all of the Company’s assets; or (iii) if and only if prior to (and not in connection with or after) the consummation of an initial public offering by the Company, any sale, transfer or issuance or series of sales, transfers and/or issuance of shares of the Company’s capital stock by the Company or any holder thereof (in any form of transaction) which results in the stockholders of the Company on the Effective Date ceasing to be the record owners of capital stock of the Company possessing a majority of the voting power of the Company’s capital stock or otherwise (including by contract) ceasing to have the power to designate a majority of the directors on the Company’s Board of Directors; or (iv) if and only if after (and not prior to or in connection with) the consummation of an initial public offering by the Company, the directors on the Company’s Board of Directors as of immediately following consummation of such initial public offering (together with any new directors whose election by such Board of Directors or whose nomination for election by the shareholders of the Company was approved by a majority vote

of the directors of the Company then still in office who were either directors on the date of such initial public offering or whose election or nomination for election was previously so approved) cease for any reason to constitute a majority of the Board of Directors then in office. A transaction shall not constitute a Change of Control (even if it otherwise would pursuant to any of the foregoing) if (i) it is one or more bona fide equity financings of the Company in which (A) no single Person or group of related Persons purchasing such equity securities acquires capital stock of the Company possessing a majority of the voting power of the Company’s capital stock and (B) the proceeds are not used to provide substantial liquidity to the stockholders through a repurchase of outstanding stock or similar recapitalization or (ii) its sole purpose is to change the state of the Company’s incorporation or to create a holding company that will be owned in substantially the same proportions by the persons who held the Company’s securities immediately before such transaction. “Person” shall mean any individual, corporation, partnership, trust, limited liability company, association or other entity.

“Cause” shall mean (i) unauthorized use or disclosure by Purchaser of the Company’s confidential information or trade secrets, which use or disclosure causes material harm to the Company; (ii) a material breach by Purchaser of any agreement between the Purchaser and the Company after notice and opportunity to cure (if curable); (iii) Purchaser’s conviction of, or plea of “guilty” or “no contest” to, a felony under the laws of the United States or any state thereof; (iv) Purchaser’s failure to perform lawful instructions of the Company (or its successor) after notice and opportunity to cure (if curable); or (v) Purchaser’s repeated breach of any agreement between Purchaser and Company or failure to perform lawful instructions of the Company (or its successor) following notice of at least one of such breaches of a similar nature or at least one of such failures.

“Good Reason” shall mean a termination of employment by Purchaser following the occurrence of one or more of the following events: (i) the Company’s requirement that Purchaser relocate to a place of employment more than fifty (50) miles from San Francisco, California, without Purchaser’s express written consent; (ii) a reduction of more than 10% (other than an equivalent percentage reduction in annual base salaries that applies to all employees in Purchaser’s business unit) by the Company of Purchaser’s base salary without Purchaser’s express written consent; or (iii) a substantial diminution in Purchaser’s responsibilities as in effect on Purchaser’s commencement of employment with the Company, or a change in the Purchaser’s title other than in circumstances where the Company’s business is acquired by and becomes a division or other business unit of a larger business and Purchaser’s title is changed to another title reflecting Purchaser’s status as the most senior executive responsible for financial risk management, planning and reporting of the division or other business unit that is (or is the successor to) the Company where there is a chief financial officer with such responsibilities for the overall acquiring business, each without Purchaser’s express written consent; provided in each case that Purchaser shall have given the Company written notice describing any such “Good Reason” in reasonable detail and that Purchaser intends to resign for such “Good Reason” within forty-five (45) days of such reason(s) occurring, the Company shall have at least thirty (30) days from the date of such notice in which to cure such “Good Reason.”

6.4 Adjustments. The number of Shares that are Vested Shares or Unvested Shares will be proportionally adjusted to reflect any stock dividend, stock split, reverse stock split or recapitalization of the common stock of the Company occurring after the Effective Date.

6.5 Exercise of Repurchase Option at Original Price. If (a) Purchaser elects to terminate his employment with the Company for Good Reason after the Effective Date or (b) beginning sixty (60) days after the Effective Date, at any time within thirty (30) days after the Termination Date, the Company may elect to repurchase any or all of the Unvested Shares by giving Purchaser written notice of exercise of the Repurchase Option. The Company and/or its assignee(s) will then have the option to repurchase from Purchaser (or from Purchaser’s personal representative as the case may be) any or all of the Unvested Shares at the Purchase Price Per Share specified in Section 1 above, as adjusted to reflect any stock dividend, stock split, reverse stock split or recapitalization of the common stock of the Company occurring after the Effective Date (the “Repurchase Option Price”).

6.6 Payment of Repurchase Price. The Repurchase Option Price will be payable, at the option of the Company or its assignee(s), by check or by cancellation of all or a portion of any outstanding indebtedness owed by Purchaser to the Company (or to such assignee) or by any combination thereof. The Repurchase Option Price will be paid without interest within fourteen (14) days after the Company gives the Purchaser written notice of the exercise of its Repurchase Option.

6.7 Right of Termination Unaffected. Nothing in this Agreement will be construed to limit or otherwise affect in any manner whatsoever the right or power of the Company (or any parent, subsidiary or affiliate of the Company) to terminate Purchaser’s employment with the Company (or any parent, subsidiary or affiliate of the Company) at any time for any reason or no reason, with or without cause.

7.1 Encumbrances on Vested Shares. Purchaser may grant a lien or security interest in, or pledge, hypothecate or encumber Vested Shares only if each party to whom such lien or security interest is granted, or to whom such pledge, hypothecation or other encumbrance is made, agrees in a writing satisfactory to the Company that: (a) such lien, security interest, pledge, hypothecation or encumbrance will not apply to such Vested Shares after they are acquired by the Company and/or its assignees under this Section; and (b) the provisions of this Section will continue to apply to such Vested Shares in the hands of such party and any transferee of such party. Purchaser may not grant a lien or security interest in, or pledge, hypothecate or encumber, any Unvested Shares.

7.2 Encumbrance on Shares. Subject to the terms and conditions of this Agreement, Purchaser will have all of the rights of Shares from and after the date that Purchaser delivers payment of the Purchase Price until such time as Purchaser disposes of the Shares or the Company and/or its assignee(s) exercise(s) the Right of First Refusal or the Repurchase Option. Upon an exercise of the Right of First Refusal or the Repurchase Option, Purchaser will have no further rights as a holder of the Shares so purchased upon such exercise, except the right to receive payment for the Shares so purchased in accordance with the provisions of this Agreement, and Purchaser will promptly surrender the stock certificate(s) evidencing the Shares so purchased to the Company for transfer or cancellation.

8. ESCROW. As security for Purchaser’s faithful performance of this Agreement, Purchaser agrees, immediately upon receipt of the stock certificate(s) evidencing the Shares, to deliver such certificate(s), together with the Stock Powers executed by Purchaser and by Purchaser’s spouse, if any (with the date, transferee, stock certificate number and number of Shares left blank), to the Secretary of the Company or other designee of the Company (the “Escrow Holder”), who is hereby appointed to hold such certificate(s) and Stock Powers in escrow and to take all such actions and to effectuate all such transfers and/or releases of such Shares as are in accordance with the terms of this Agreement. Escrow Holder will act solely for the Company as its agent and not as a fiduciary. Purchaser and the Company agree that Escrow Holder will not be liable to any party to this Agreement (or to any other party) for any actions or omissions unless Escrow Holder is grossly negligent or intentionally fraudulent in carrying out the duties of Escrow Holder under this Agreement. Escrow Holder may rely upon any letter, notice or other document executed with any signature purported to be genuine and may rely on the advice of counsel and obey any order of any court with respect to the transactions contemplated by this Agreement. The Shares will be released from escrow upon termination of the Right of First Refusal and the Repurchase Option.

9. TAX CONSEQUENCES. PURCHASER UNDERSTANDS THAT PURCHASER MAY SUFFER ADVERSE TAX CONSEQUENCES AS A RESULT OF PURCHASER’S PURCHASE OR DISPOSITION OF THE SHARES. PURCHASER REPRESENTS (a) THAT PURCHASER HAS CONSULTED WITH A TAX ADVISER THAT PURCHASER DEEMS ADVISABLE IN CONNECTION WITH THE PURCHASE OR DISPOSITION OF THE SHARES AND (b) THAT PURCHASER IS NOT RELYING ON THE COMPANY FOR ANY TAX ADVICE. Purchaser hereby acknowledges that Purchaser has been informed that, in addition to receiving taxable income upon the receipt of any Shares paid for by the cancellation of compensation for services rendered, unless an election is filed by the Purchaser with the Internal Revenue Service (and, if necessary, the proper state taxing authorities) within 30 days after the purchase of the Shares to be effective, electing pursuant to Section 83(b) of the Internal Revenue Code (and similar state tax provisions, if applicable) to be taxed currently on any difference between the Purchase Price of the Shares and their fair market value on the date of purchase, there will be a recognition of taxable income to the Purchaser, measured by the excess, if any, of the fair market value of the Shares, at the time they cease to be Unvested Shares, over the Purchase Price for such Shares. Purchaser represents that Purchaser has consulted any tax advisors Purchaser deems advisable in connection with Purchaser’s purchase of the Shares and the filing of the election under Section 83(b) and similar tax provisions. A form of Election under Section 83(b) is attached hereto as Exhibit 3 for reference. PURCHASER HEREBY ASSUMES ALL RESPONSIBILITY FOR FILING SUCH ELECTION AND PAYING ANY TAXES RESULTING FROM SUCH ELECTION OR FROM FAILURE TO FILE THE ELECTION AND PAYING TAXES RESULTING FROM THE LAPSE OF THE REPURCHASE RESTRICTIONS ON THE UNVESTED SHARES.

10.1 Legends. Purchaser understands and agrees that the Company will place the legends set forth below or similar legends on any stock certificate(s) evidencing the Shares, together with any other legends that may be required by state or federal securities laws, the Company’s Certificate of Incorporation or Bylaws, any other agreement between Purchaser and the Company or any agreement between Purchaser and any third party:

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON PUBLIC RESALE AND TRANSFER, INCLUDING THE RIGHTS OF REPURCHASE AND FIRST REFUSAL HELD BY THE ISSUER AND/OR ITS ASSIGNEE(S), AND A MARKET STANDOFF RESTRICTION, AS SET FORTH IN A RESTRICTED STOCK PURCHASE AGREEMENT BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER. SUCH PUBLIC SALE AND TRANSFER RESTRICTIONS, INCLUDING THE RIGHTS OF REPURCHASE AND FIRST REFUSAL, AND THE MARKET STANDOFF RESTRICTION, ARE BINDING ON TRANSFEREES OF THESE SHARES.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO RESTRICTIONS ON TRANSFER CONTAINED IN THE BYLAWS OF THE COMPANY.

10.2 Stop-Transfer Instructions. Purchaser agrees that, to ensure compliance with the restrictions imposed by this Agreement, the Company may issue appropriate “stop-transfer” instructions to its transfer agent, if any, and if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records. The Company will not be required (a) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (b) to treat as owner of such Shares, or to accord the right to vote or pay dividends, to any purchaser or other transferee to whom such Shares have been so transferred.

11. COMPLIANCE WITH LAWS AND REGULATIONS. The issuance and transfer of the Shares will be subject to and conditioned upon compliance by the Company and Purchaser with all applicable state and federal laws and regulations and with all applicable requirements of any stock exchange or automated quotation system on which the Company’s Common Stock may be listed or quoted at the time of such issuance or transfer.

12.1 Notices. Any and all notices required or permitted to be given to a party pursuant to the provisions of this Agreement will be in writing and will be effective and deemed to provide such party sufficient notice under this Agreement on the earliest of the following: (a) at the time of personal delivery, if delivery is in person; (b) one business day after deposit with an express overnight courier for United States deliveries, or two business days after such deposit for deliveries outside of the United States; or (c) three business days after deposit in the United States mail by certified mail (return receipt requested) for United States deliveries. All notices for delivery outside the United States will be sent by express courier. All notices not delivered personally will be sent with postage and/or other charges prepaid and properly addressed to the party to be notified at the address set forth below the signature lines of this Agreement or at such other address as such other party may designate by one of the indicated means of notice herein to the other party hereto. A “business day” shall be a day, other than Saturday or Sunday, when the banks in the city of San Francisco are open for business.

12.2 Further Assurances. The parties agree to execute such further documents and instruments and to take such further actions as may be reasonably necessary to carry out the purposes and intent of this Agreement.

12.3 Titles and Headings. The titles, captions and headings of this Agreement are included for ease of reference only and will be disregarded in interpreting or construing this Agreement. Unless otherwise specifically stated, all references herein to “sections” and “exhibits” will mean “sections” and “exhibits” to this Agreement.

12.4 Governing Law. This Agreement will be governed by and construed in accordance with the laws of the State of California, without giving effect to that body of laws pertaining to conflict of laws.

12.5 Assignments; Successors and Assigns. The Company may assign any of its rights and obligations under this Agreement, including but not limited to its rights to repurchase Shares under the Right of First Refusal and the Repurchase Option. Any assignment of rights and obligations by any other party to this Agreement requires the Company’s prior written consent. This Agreement, and the rights and obligations of the parties hereunder, will be binding upon and inure to the benefit of their respective successors, assigns, heirs, executors, administrators and legal representatives.

12.6 Entire Agreement. This Agreement and the documents referred to herein constitute the entire agreement and understanding of the parties with respect to the subject matter of this Agreement, and supersede all prior understandings and agreements, whether oral or written, between or among the parties hereto with respect to the specific subject matter hereof.

12.7 Amendment and Waivers. This Agreement may be amended only by a written agreement executed by each of the parties hereto. No amendment of or waiver of, or modification of any obligation under this Agreement will be enforceable unless set forth in a writing signed by the party against which enforcement is sought. Any amendment effected in accordance

with this section will be binding upon all parties hereto and each of their respective successors and assigns. No delay or failure to require performance of any provision of this Agreement shall constitute a waiver of that provision as to that or any other instance. No waiver granted under this Agreement as to any one provision herein shall constitute a subsequent waiver of such provision or of any other provision herein, nor shall it constitute the waiver of any performance other than the actual performance specifically waived.

12.8 Severability. If any provision of this Agreement is determined by any court or arbitrator of competent jurisdiction to be invalid, illegal or unenforceable in any respect, such provision will be enforced to the maximum extent possible given the intent of the parties hereto. If such clause or provision cannot be so enforced, such provision shall be stricken from this Agreement and the remainder of this Agreement shall be enforced as if such invalid, illegal or unenforceable clause or provision had (to the extent not enforceable) never been contained in this Agreement. Notwithstanding the forgoing, if the value of this Agreement based upon the substantial benefit of the bargain for any party is materially impaired, which determination as made by the presiding court or arbitrator of competent jurisdiction shall be binding, then both parties agree to substitute such provision(s) through good faith negotiations.

12.9 Counterparts; Facsimile Signatures. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered will be deemed an original, and all of which together shall constitute one and the same agreement. This Agreement may be executed and delivered by facsimile and upon such delivery the facsimile signature will be deemed to have the same effect as if the original signature had been delivered to the other party.

IN WITNESS WHEREOF, the Company has caused this Restricted Stock Purchase Agreement to be executed by its duly authorized representative and Purchaser has executed this Agreement, each as of the Effective Date.

FOR VALUE RECEIVED and pursuant to that certain Restricted Stock Purchase Agreement dated as of , (the “Agreement”), the undersigned hereby sells, assigns and transfers unto , shares of the Common Stock $0.000005 par value per share, of Twitter, Inc., a Delaware corporation (the “Company”), standing in the undersigned’s name on the books of the Company represented by Certificate No(s). delivered herewith, and does hereby irrevocably constitute and appoint the Secretary of the Company as the undersigned’s attorney-in-fact, with full power of substitution, to transfer said stock on the books of the Company. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT AND ANY EXHIBITS THERETO.

PURCHASER

(Signature)

(Please Print Name)

(Spouse’s Signature, if any)

(Please Print Spouse’s Name)

Instructions to Purchaser: Please do not fill in any blanks other than the signature line. The purpose of this Stock Power and Assignment is to enable the Company and/or its assignee(s) to acquire the shares upon exercise of its “Right of First Refusal” and/or “Repurchase Option” set forth in the Agreement without requiring additional signatures on the part of the Purchaser or Purchaser’s Spouse, if any.

The undersigned spouse of (the “Purchaser”) has read, understands and hereby approves all the terms and conditions of the Restricted Stock Purchase Agreement dated , (the “Agreement”), by and between Purchaser and Twitter, Inc., a Delaware corporation (the “Company”), pursuant to which Purchaser has purchased shares of the Company’s common stock (the “Shares”).

In consideration of the Company granting my spouse the right to purchase the Shares under the Agreement, I hereby agree to be irrevocably bound by all the terms and conditions of the Agreement (including but not limited to the Company’s Repurchase Option, the Right of First Refusal and the market standoff agreements contained therein) and further agree that any community property interest I may have in the Shares will be similarly bound by the Agreement.

I hereby appoint Purchaser as my attorney-in-fact, to act in my name, place and stead with respect to any amendment of the Agreement and with respect to the making and filing of an election under Internal Revenue Code Section 83(b) in connection with the purchase of the Shares.

Signature of Spouse [Sign Here]

Name of Spouse [Please Print]

¨ Check this box if you do not have a spouse.

The undersigned Taxpayer hereby elects, pursuant to Section 83(b) of the Internal Revenue Code, as amended, to include in gross income for the Taxpayer’s current taxable year the excess, if any, of the fair market value of the property described below at the time of transfer over the amount paid for such property, as compensation for services.

THIS ELECTION MUST BE FILED WITH THE INTERNAL REVENUE SERVICE (“IRS”), AT THE OFFICE WHERE THE TAXPAYER FILES ANNUAL INCOME TAX RETURNS, WITHIN 30 DAYS AFTER THE DATE OF TRANSFER OF THE PROPERTY, AND MUST ALSO BE FILED WITH THE TAXPAYER’S INCOME TAX RETURNS FOR THE CALENDAR YEAR. THE ELECTION CANNOT BE REVOKED WITHOUT THE CONSENT OF THE IRS.


Participant:		«Name»

Social Security Number:

Address:



Total Option Shares:		«Shares»

Exercise Price per Share:		«Price»

Date of Grant:		«Grant»

First Vesting Date:		«VestingDate»

Expiration Date:		«Expiration»

		(Unless earlier terminated under Section 5.6 of the Plan or Section 3 of this Agreement)

Type of Stock Option
(Check one):		[ ] Incentive Stock Option

		[ ] Nonqualified Stock Option


Purchaser:		«Name»



Social Security Number:

Address:



Phone Number:

Email Address:

Total Number of Shares:

Exercise Price per Share:		«Price»

Date of Grant:		«Grant»

First Vesting Date:		«VestingDate»

Expiration Date:		«Expiration»
		(Unless earlier terminated under Section 5.6 of the Plan or Section 3 of the Stock Option Agreement)

Type of Stock Option

(Check one):		[ ] Incentive Stock Option

		[ ] Nonqualified Stock Option





Purchaser desires to take title to the Shares as follows:

[ ] Individual, as separate property

[ ] Husband and wife, as community property

[ ] Joint Tenants

[ ] Other; please specify:


Exhibit 1:		Stock Power and Assignment Separate from Stock Certificate
Exhibit 2:		Spouse Consent
Exhibit 3:		Copy of Purchaser’s Check


Exhibit 1:		Stock Power and Assignment Separate from Stock Certificate
Exhibit 2:		Spouse Consent
Exhibit 3:		83(b) election
Exhibit 4:		Copy of Purchaser’s Check


COMPANY						PURCHASER
TWITTER, INC.

By:						By:

Name:						Address:

Title:

Address:


1.		TAXPAYER’S NAME:

		TAXPAYER’S ADDRESS:


		SOCIAL SECURITY NUMBER: