Hitachi-LG Data Storage Inc., Toshiba-Samsung Storage Technology Corp. (TSST) and Sony-Optiarc are among the companies that face fines, according to Bloomberg's sources. Royal Philips NV has said it was granted immunity from any fines in the case, which is conditional on continued cooperation with regulators.
Samsung Electronics and Toshiba sold the venture (TSST) to Optis Co. last year.
European Union regulators may issue the penalties before they break off for the summer break at the end of July, bloomberg's report added.
In a similar U.S. investigation, Hitachi-LG agreed to plead guilty and pay a $21.1 million fine for conspiring with other companies from June 2004 through September 2009 to rig bids and fix prices for optical drives sold to Dell, Hewlett-Packard and Microsoft.