John Kosir is a corporate partner in the Chicago office of Kirkland & Ellis LLP, where he concentrates his practice on complex business transactions, including mergers and acquisitions, leveraged buyouts, joint ventures, divestitures, recapitalizations and restructurings, private financings, executive compensation and incentive equity arrangements, and other general corporate matters. John has handled such matters on behalf of, among others, Arsenal Capital, Bain Capital, Dunes Point Capital, GTCR, Madison Dearborn Partners, Thoma Bravo and Thomas H. Lee Partners, as well as many of their portfolio companies.



Registered Certified Public Accountant, State of Illinois, December 2010


Admissions & Qualifications

  • 2014Illinois


  • English
  • Croatian


  • Loyola University Chicago School of LawJ.D.magna cum laude2014

    CALI Award recipient for highest grade in Estate and Gift Tax

    Loyola Law Journal

    Chicago Bar Association Federal Tax Section’s Award for Academic Achievement in Taxation

  • University of Illinois at Urbana-ChampaignM.Acc.; Finance Minor2010
  • University of Illinois at Urbana-ChampaignB.S., Accountancywith Honors2009