Antitrust litigation is a remarkably broad category, encompassing everything from class action defense to internal investigations to closed-door negotiations with regulators. Simpson Thacher & Bartlett excels across the whole spectrum, despite having a relatively modest roster of 42 antitrust lawyers.

Because of its size, the group doesn’t handle as many cases as larger firms like White & Case and Skadden, Arps, Slate, Meagher & Flom. But the cases Simpson Thacher does handle usually involve high stakes and the potential to set precedent. That’s been particularly true in the wake of the financial crisis, which has prompted plaintiffs-side antitrust lawyers to closely scrutinize Simpson Thacher’s portfolio clients in the financial services and private equity industries.