Read the merger agreement. Section 2.7
2.7 Closing of Stock Transfer Books. At the Effective Time, holders of certificates representing shares of Company Capital Stock that were outstanding immediately prior to the Effective Time shall cease to have any rights as shareholders of Company, and the stock transfer books of Company shall be closed with respect to all shares of such capital stock outstanding immediately prior to the Effective Time. No further transfer of any such shares of Company Capital Stock shall be made on such stock transfer books after the Effective Time. If, after such time, any such certificates are presented to the Surviving Corporation for any reason, they shall be cancelled and exchanged as provided in Sections 2.3, 3.3 and 3.7, as applicable.