TOKYO, Nov 4 (Reuters) - Shares in Fujifilm Holdings Corp (4901.T) surged in early Tokyo trading on Thursday after the camera and drug maker released half-year earnings ahead of schedule, revealing a jump in sales and profit. Fujifilm shares surged as much as 4.8% versus a 1% advance on the benchmark Nikkei index. The company, which was scheduled to release the results after market close at 3 p.m. (0600 GMT) in Tokyo, said it had inadvertently sent them to some overseas institutional investors early. That prompted Fujifilm to publish the results in Japan at 9:05 am. The company is investigating the matter, a spokesperson said. For the half-year, Fujifilm"s sales rose 21% to 1.21 trillion yen ($10.60 billion), while operating profit jumped 91% to 107.9 billion yen. The company raised full-year forecasts for both. Traditionally known for photography and office equipment, Fujifilm is undergoing a three-year, $11 billion investment plan to cement healthcare as its biggest centre of revenue and profit. read more ($1 = 114.1600 yen) Reporting by Rocky Swift; Editing by Ramakrishnan M. Our Standards: The Thomson Reuters Trust Principles.