This Plan was adopted by the Board of Directors of the Company on March 18, 2011, effective as of July 1, 2011 (the “ Effective Date ”), and shall apply to any purchase right granted, or stock transferred pursuant to any purchase right granted, on or after the Effective Date. This Plan shall continue until the earlier to occur of (a) termination of this Plan by the Board (which termination may be effected by the Board at any time), (b) issuance of all of the shares of Common Stock reserved for issuance under this Plan, or (c) April 27, 2021.