Skadden, Arps, Slate, Meagher & Flom sat atop three separate rankings of legal advisers for M&A deals based on total transaction value in the first half of the year.

The firm took the lead in the so-called league tables released this week by Bloomberg, Thomson Reuters and Mergermarket, thanks to its work on three of the biggest announced transactions since the start of the year: Comcast’s $68 billion buy of Time Warner in February, Valeant Pharmaceuticals’ $54 billion bid for Allergan in April, and Medtronic’s $46 billion acquisition of Covidien in June.