A quartet of US firms have won top roles on AT&T’s $85.4bn (£70bn) acquisition of Time Warner.
Telecoms target Time Warner turned to a team from Cravath Swaine & Moore led by M&A partners Faiza Saeed and Eric Schiele.
Antitrust advice was provided by partner Christine Varney.
The acquirer AT&T, which owns CNN and HBO, sought advice from Sullivan & Cromwell which fielded a team led by corporate partners Joseph Frumkin, Eric Krautheimer and Melissa Sawyer.
Tax advice was provided by partner Andrew Mason, with executive compensation, intellectual property and environmental matters handled by partners Matthew Friestedt, Nader Mousavi and special counsel Matthew Brennan respectively.
Financing partners Neal McKnight and Ari Blaut were also involved, along with litigation partners William Monahan, Adam Paris and Steven Peikin.
All Sullivan partners were based in New York, bar Krautheimer, Mousavi and Paris.
Arnold & Porter is also understood to have won work on the takeover for AT&T on the competition side.
AT&T’s financial advisers JP Morgan and Perella Weinberg looked for legal counsel from Weil Gotshal & Manges partners Michael Aiello and Matthew Gilroy. They were supported by banking partner Morgan Bale, also in New York.
Time Warner is known for having one of the largest film and TV studios in the world, while AT&T is the US’ third largest cable provider.
The deal is expected to go through rigorous competition checks, with the tie-up the biggest merger to be announced this year.