Bloomberg: Viacom’s loudest critic is one of its smallest investors. SpringOwl Asset Management, the New York-based investment firm calling for major changes at the owner of MTV and Nickelodeon, owns 8,882 Viacom Class B shares as of Dec. 31, worth just over $300,000. It isn’t one of the media company’s 500 largest shareholders. Activist investors usually hold a larger stake in a target company.