Just about every practice area at Vinson & Elkins was up in 2013 compared with 2012. That led to strong results at the Houston-based firm, with a 6.5 percent increase in gross revenue and a 13.3 percent jump in net income.

“We were very, very pleased with 2013,” said T. Mark Kelly, chairman of the firm and a partner in Houston. He attributed the busy year to “great clients.”