Federal judges in Washington gathered Wednesday to honor 30 law firms where at least 40 percent of all lawyers performed at least 50 hours of pro bono service last year.

Twelve firms reported having 50 percent of more of all attorneys perform at least 50 hours of pro bono work. U.S. District Judge Emmet Sullivan highlighted Arnold & Porter and Jenner & Block, where at least 65 percent of the firms’ lawyers met or exceeded the 50-hour mark.