Subsequent Options. Each Subsequent Option shall vest and become exercisable on the earlier of the first anniversary of the date of grant or the day immediately prior to the date of the next annual meeting of the Company’s stockholders occurring after the date of grant, in either case, subject to the Non-Employee Director continuing in service as a Non-Employee Director through such vesting date.

Initial Options. Each Initial Option shall vest and become exercisable in thirty-six (36) substantially equal monthly installments following the date of grant, such that the Initial Option shall be fully vested on the third anniversary of the date of grant, subject to the Non-Employee Director continuing in service as a Non-Employee Director through each such vesting date.

Vesting. Subject to Section 2(d)(iii) below, each Initial Award shall vest and become exercisable in thirty-six (36) substantially equal installments on each monthly anniversary of the date of grant, subject to the Non-Employee Director continuing to provide services to the Company through each such vesting date. Subject to Section 2(d)(iii) below, each Subsequent Award shall vest and become exercisable in full on the earlier of the one=year anniversary of the date of grant and the next annual meeting of the Company’s stockholders after the grant date, subject to the Non-Employee Director continuing to provide services to the Company through such vesting date.