strong global entertainment inc a unit of diversified holding company ballantyne strong inc has filed with the us securities and exchange commission for a proposed initial public offering the filing by the charlotte nc doesnt indicate how many shares it plans to sell or an expected price range strong global which makes and sells largeformat projection screens said it has applied to list its shares listed on the new york stock exchange american under the symbol sge ballantyne strong which last year said it had confidentially filed a draft registration statement with the sec for the proposed ipo will retain control of a majority of strong globals voting power after the offering