The auction for big-screen purveyor Imax ( IMAX) appears to be nearing a decision. Toronto's Globe & Mail reported Thursday that second-round potential buyers of the movie technology shop include Sony ( SNE), private equity fund Elevation Partners and South Korean film exhibitor CJCGV. Sony has released films in Imax. CJCGV has five licensing deals with Imax. Elevation counts U2 singer Bono as a backer. Imax put itself on the block this spring. Analysts estimate that the company will likely fetch between $12 and $14 a share, or between $600 and $700 million. Imax shares jumped 6% Thursday to $10.68 on word of the activity. Analysts speculate that another interested party could be Time Warner ( TWX), whose Warner Brothers studio has released several of its blockbusters in Imax recently. A Time Warner rep declined comment. An announcement is expected by Aug. 9, according to sources who also expect the company to announce second-quarter earnings on or around that date. The company hasn't made any formal earnings-date announcement. Films released in Imax have done well at the box office. Recent examples include The Polar Express and the Batman and Harry Potter sequels. Imax declined to comment on the sale process, which is being run by Allen & Co. and UBS.