GOP presidential candidate Mitt Romney saw little change in his personal worth over the past year, according to a report filed Friday. The Bain Capital founder and former Massachusetts governor sits atop a fortune of as much as $250 million, much of it locked up in two blind trusts that were set up in 2003, before he took office in the Bay State. Many of the holdings in the trust date back to Romney’s Bain days and are the source of much of his overall worth. Over the past year, Romney’s investment fund managers did take steps to divest substantial stock holdings, bringing his cash assets to more than $6.4 million. His fund managers sold off shares in Coca-Cola and Apple, among other major companies, while retaining stock in Ford Motor Co. and Marriott.