| (b) | Transfers. Subject to any restrictions on transfer, shares of stock may be transferred on the books of the Corporation by the surrender to the Corporation or its transfer agent of the certificate therefor properly endorsed or accompanied by a written assignment or power of attorney properly executed, with transfer stamps (if necessary) affixed, and with such proof of the authenticity of signature as the Corporation or its transfer agent may reasonably require. No stockholder may sell, transfer, assign, encumber, pledge or otherwise dispose of (i) any shares of the Corporation’s Common Stock (the “Common Stock”), $0.000001 par value per share (other than Common Stock acquired upon conversion of any shares of the Corporation’s Preferred Stock (the “Preferred Stock”), $0.000001 par value per share) or (ii) any of the economic consequences of ownership of the Corporation’s Common Stock (other than Common Stock acquired upon conversion of any shares of Preferred Stock), in each case, without the prior consent of the Board of Directors, provided, however, that the foregoing restrictions shall not apply to: (a) in the case of a stockholder that is an entity, transfers by a stockholder to its Affiliates (as defined below) or current or former stockholders, members, partners or other equity holders, (b) a repurchase of stock from a stockholder by the Corporation at a price no greater than that originally paid by such stockholder for such stock and pursuant to an agreement containing vesting and/or repurchase provisions approved by a majority of the Board of Directors, or (c) in the case of a stockholder that is a natural person, upon a transfer of stock by such stockholder made for bona fide estate planning purposes, either during his or her lifetime or on death by will or intestacy to his or her spouse, child (natural or adopted), or any other direct lineal descendant of such stockholder (or his or her spouse) (all of the foregoing collectively referred to as “family members”), or any other relative approved by the Board of Directors of the Corporation, or any custodian or trustee of any trust, partnership or limited liability company for the benefit of, or the ownership interests of which are owned wholly by such stockholder or any such family members. For purposes of this Section 4(b), “Affiliate” means, with respect to any specified stockholder that is an entity, any other individual or entity who directly or indirectly, controls, is controlled by or is under common control with such stockholder, including, without limitation, any general partner, managing member, officer or director of such stockholder, or any venture capital, private equity or similar investment fund now or hereafter existing which is controlled by one or more general partners or managing members of, or shares the same management company with, such stockholder. |