Attention to single-firm conduct has remained high in the US over the past 12 months. This is strikingly evident in the recent launch of the Federal Trade Commission’s (the FTC) investigation into Google. The Antitrust Division of the Department of Justice (the DoJ) also remained diligent in this area, bringing its first case since 1999 alleging monopolistic anti-competitive single-firm conduct. And private actions alleging anti-competitive single firm conduct show no signs of abating. The continued scrutiny of single-firm conduct is consistent with the Obama administration’s stated and continuing interest in this area of antitrust enforcement. In the current environment, businesses with significant market share are well-advised to conduct themselves with care.