Kirkland & Ellis, Gibson, Dunn & Crutcher, and Watchell, Lipton, Rosen & Katz have taken lead roles on the announced $4.4 billion acquisition of U.K.- based travel technology firm Travelport Worldwide Limited by affiliates of Siris Capital Group and Evergreen Coast Capital, the private equity arm of activist investor Elliott Management Corp.

Kirkland corporate partners Daniel Wolf and Shaun Mathew advised Travelport on the deal. Gibson Dunn M&A and private equity partner Richard Birns and tax partner Eric Sloan acted as counsel to Evergreen. Wachtell attorneys advising Siris included corporate partners Andrew Nussbaum and Igor Kirman, antitrust partner Ilene Knable Gotts, finance partner Joshua Feltman, executive compensation and benefits partner Andrea Wahlquist, and tax partner Jodi Schwartz.