The past several days have been a big week for announced deals, as Kirkland & Ellis; Latham & Watkins; Davis, Polk & Wardwell; Sidley Austin; and Sullivan & Cromwell, among others, all took leading roles in three mega deals worth a collective $37 billion.

The largest of those three includes ONEOK Inc. agreeing to buy U.S. pipeline operator Magellan Midstream Partners in a deal valued at $18.8 billion. In the Sunday-announced deal, Kirkland is representing ONEOK, while Latham & Watkins is advising Magellan.