Cupertino, Calif. — Andy Miller, Apple’s vice president of mobile advertising, has plans to leave the company according to a report in AllThingsD today.

Sources told AllThingsD that Miller plans to become a general partner at Highland Capital, a venture firm that funded Quattro — a mobile advertising company he co-founded in 2006. Miller later sold the company to Apple in early 2010 for $275 million, but Apple shut down Quattro in favor of its iAd platform.

Sources said Miller will be replaced after Apple’s staff was told about his departure. His job at Highland will include working on a number of digital investments, not all of which involve the mobile space.

As is the company’s usual practice, Apple declined to comment on the situation.

Related Links: (AllThingsD)

Photo of Andy Miller, courtesy of Quattro