Sound Ventures, a fund co-founded by Ashton Kutcher and Guy Oseary, has filed paperwork indicating plans to raise a third fund at $150 million. Notably, the firm filed paperwork for the same total in 2018 for its second fund. The firm did not immediately respond to a request for comment on its plans to raise a new fund. Sound Ventures was born to write bigger and later-stage checks, or at a minimum, be stage-agnostic. Despite Kutcher’s fame and high-profile stakes, the firm has operated somewhat quietly in the recent past….