From 2004 to 2008, McClendon ran a $200 million hedge fund, Heritage Management Company LLC, with Tom Ward. He invested $35 million in ProCure Treatment Centers Inc., a company with three proton-therapy based cancer treatment centers, in 2008. From 2004 to 2006, McClendon bought almost of mostly undeveloped dunes on the east coast of Lake Michigan and the Kalamazoo River for $39.5 million. He had previously secured a half-interest on the land in 2004. In 2006, the five-member Township Board representing Saugatuck, Michigan voted unanimously to rezone the land, making development more difficult. The Township Board supported the views of local citizens and the Saugatuck Dunes Coastal Alliance, who argued that McClendon's plans for development would irrevocably damage the property. He continued with the land purchase, and in 2007, his legal team began discussions of scaling back the legal restrictions on the land with township officials. In 2009, McClendon sold of the land to the Western Michigan Land Conservancy. In December 2010, McClendon filed a federal lawsuit attempting to overturn the zoning laws and a settlement was reached in 2012 which voided Saugatuck's 2006 rezoning. From 2008 to 2013, McClendon was one of the U.S.'s largest landowners, owning more than . Oklahoma City Thunder McClendon was an original member of the Professional Basketball Club LLC, which owns the National Basketball Association (NBA)'s Oklahoma City Thunder franchise. He was a part of the team that moved the Seattle SuperSonics to Oklahoma City in 2008, where they were renamed the Oklahoma City Thunder. At the time the team moved, McClendon owned 20 percent of the franchise. Prior to the move, in 2007, McClendon was quoted in The Journal Record (an Oklahoma City newspaper) as saying "we (the ownership group) didn't buy the Seattle SuperSonics to keep them in Seattle". The NBA fined McClendon $250,000 in response, as his statement contradicted the organization's publicized intentions at the time. In April 2014, he purchased more shares in the Oklahoma City Thunder franchise from G. Jeffrey Records Jr. Philanthropy and community involvement McClendon made sizable donations to and served on the board of directors for many municipal and private organizations in Oklahoma City, including the Boathouse District and Boathouse Foundation, The McClendon Family Boys and Girls Club of OKC, the Oklahoma City Chamber of Commerce, Oklahoma State Fair and Oklahoma City Public Schools. He donated to Oklahoma City arts organizations, including the Lyric Theatre, Oklahoma