General Motors [GM 22.44 0.40 (+1.81%) ] has released an SEC filing disclosing a contract between the automaker and an ad agency that employs the wife of GM CFO Dan Ammann. The disclosure comes a month after GM filed its annual proxy statement listing potential conflicts of interest involving GM executives. In this case, Ammann says he was unaware of the contract with his wife’s ad agency until GM’s corporate governance team asked him about it just a few days ago. GM says the transaction has since been ratified under the automakers Related Party Transaction Policy. The contract in question...