B common stock. Each owner of Series A common stock is allowed 1 vote per share of voting power and Series B common stock owners are allowed 10 votes per share. 2008: On September 4, 2008, Ascent Media completed the sale of 100% of the ownership interests in AccentHealth to an unaffiliated third party for net cash proceeds of $118,643,000. 2008: The AMC Spin Off was completed on September 17, 2008. Following the AMC Spin Off, AMC and DHC operate independently, and neither has any stock ownership, beneficial or otherwise, in the other. 2008: Ascent Media Group's Creative Sound Services group spun off from Discovery Holding Company to create CSS Studios, LLC, a wholly owned subsidiary of Discovery Communications. This included the assets of Todd-AO, Soundelux, Sound One, POP Sound, Modern Music, Soundelux Design Music Group and The Hollywood Edge. 2010: In December 2010, Ascent Media acquired Monitronics, a home security system company. 2011: On February 28, 2011, Encompass Digital Media, Inc. purchased Ascent Media's global content distribution business, including facilities in: New York metro area, Minnesota, Burbank, London and Singapore. On July 7, 2011, Ascent Media Corporation merged with its subsidiary, Ascent Capital Group, Inc., for the purpose of changing its name to Ascent Capital Group, Inc. 2012: On October 26, 2012, Monitronics acquired approximately 93,000 security alarm monitoring subscriber accounts representing $4.4 million of gross recurring monthly revenue from Pinnacle Security for a purchase price of $131 million. References External links Film production companies of the United States Companies formerly listed on the Nasdaq Corporate spin-offs