By Jyoti Narayan and Makiko Yamazaki -Hedge fund Elliott Management Corp has built a "significant" stake in Japanese automotive battery component supplier Dai Nippon Printing Co Ltd (DNP), sources familiar with the matter told Reuters on Tuesday. Elliott, one of the world's most powerful activist investors, has become one of the top three shareholders in DNP with a significant position, said the sources, who declined to be identified as the matter is private. DNP, with a market value of 829 billion yen ($6.36 billion) is among hundreds of listed Japanese companies undervalued relative to their assets. A DNP spokesperson said the company had confirmed Elliott's investment late last year, but declined to comment on details. The Financial Times, which first reported the news, said Elliott now holds a stake just under 5% worth $300 million. Elliott declined to comment.