Jenner & Block is an American law firm with offices in Century City, Chicago, London, Los Angeles, New York City, San Francisco, and Washington, D.C.[1] The firm is active in corporate litigation, business transactions, the public sector, and other legal fields.

[7] Jenner & Block was one of the first national law firms to establish a Washington practice specifically focused on appeals before the U.S. Supreme Court.

[10] Donald Verrilli Jr., who succeeded Elena Kagan as U.S. solicitor general during the Obama administration, is a former member of the practice.

The firm's 1985 antitrust lawsuit of AT&T, on behalf of MCI, sowed the seeds for the eventual break-up of telecommunications monopoly in the 1980s.

In the 1960s, the firm represented prominent Chicago cardiologist Jeremiah Stamler when he was subpoenaed to testify before the House Committee on Un-American Activities.

In 2009, then firm chairman Anton R. Valukas was appointed as the examiner in the Lehman Brothers bankruptcy, and he hired Jenner & Block to produce the report that captured the findings of a year-long investigation of the bank's finances.

[16][17] The firm has achieved several victories before the US Supreme Court regarding free speech, gay rights, copyright, civil procedure, political asylum and other matters.

[citation needed] The firm's first principal litigator, Edward R. Johnston, earned the firm's first Supreme Court victory, a landmark antitrust case against the US government (Maple Flooring Manufacturers Association v. U.S.) that allowed for trade association members to exchange information.

[20] According to annual surveys by The American Lawyer, in 2014 and 2015, Jenner & Block was the leading law firm for per-attorney hours devoted to pro bono work in the US.

[34] In 2012 and 2013, it was listed as one of the 20 most elite law firms by The American Lawyer, with inclusion on the magazine's A-List for revenue generation, pro-bono commitment, associate satisfaction and diversity representation.