Union Pacific Railroad and BNSF Railway chipped away at their significant antitrust exposure on Tuesday, fending off a lawsuit brought by the mining company Oxbow Carbon & Minerals.

By the time Warren Buffett announced David Sokol's resignation, amid questions about Sokol's investment in Lubrizol before he suggested it as a Berkshire Hathaway takeover target, three plaintiffs firms had already filed shareholder suits criticizing the deal.

We love a good drama at the Litigation Daily, so we're intently following the hotly contested dispute between Grupo Televisa, Mexico's largest media company, and Univision, the leading Spanish-language broadcaster in the United States, over rights to Grupo's enormously popular telenovelas. Trial in the high-stakes case began on Tuesday, with legal-world celebrities making appearances for both sides.

Grupo Mexico announced Tuesday that it wants the Delaware Supreme Court to reconsider its decision to uphold a landmark victory for Southern Peru shareholders. But according to the motion, Grupo is contesting only the unprecedented fee award granted to the plaintiffs lawyers in the case, and not a $2 billion judgment against the company.