Shamir Optical Industry will buy the remaining 49 percent of Altra Trading from the company's minority shareholders. The Israeli company already holds 51 percent of the share capital of Altra, and expects the purchase to help it increase its presence in Europe. Shamir has agreed to pay an amount calculated from Altra's net profit for the 2008-2010 fiscal years, to a maximum of €500,000. Altra, a German distributor and holding company, has subsidiaries in Portugal, Spain, France, Turkey and the U.K.