Katja Butler focuses on transactional private equity matters and advises sponsor-held portfolio companies between buyout and exit.


Ms. Butler frequently assists with issues that impact a group’s capital structure, and she has substantial experience in implementing equity recaps and management equity incentive programmes, simplifying and restructuring international group structures and advising in relation to contentious management departures (including regarding settlement terms and repatriation of equity). Ms. Butler also advises on the execution of exit planning and co-investment terms. In 2017, Ms. Butler was recognized by The Lawyer has one of London’s top female private equity stars and in 2018 she was featured on the publication’s Hot 100 list, which recognizes the U.K.’s top lawyers.

Her recent representations include advising:

  • funds advised by Castik Capital on its acquisition of two IP management services and software companies, ipan Group and Delegate; 
  • a consortium comprised of a Singapore sovereign wealth fund, HgCapital, ICG and Montagu on their buyout of Visma in a transaction valued at US$5.4 billion, the largest-ever European software buyout;
  • HgCapital on its:
    • sale of Ullink SAS to Itiviti AB, a portfolio company of Nordic Capital;
    • sale of Parts Alliance, a U.K. automotive aftermarket parts distributor, to Uni-Select Inc. for £205 million;
    • investment in Mitratech, a global provider of legal, risk and compliance software, alongside TA Associates and the management team at Mitratech;
    • investment in Kinapse, a global provider of advisory, capability building and operational services to the life sciences industries, from Synova Capital;
    • investment in Sovos Compliance, a provider of regulatory tax compliance software, alongside Vista Equity Partners;
    • acquisition of Raet, an HR solutions provider specialized in HR cloud software and services, from CVC Capital Partners;
    • sale of a minority stake in portfolio company JLA, a provider of asset management services to SMEs, together with a refinancing;
    • equity recapitalization of portfolio company IRIS; and
    • acquisition of The Foundry, a provider of creative software, from The Carlyle Group for an enterprise value of US$312 million;
  • HgCapital portfolio companies Ullink, Iris and Sovos on strategic bolt-on transactions;
  • Montagu portfolio companies, including Equatex, Open GI, Funeral Services Partners, Covidence and DEAS, on their capital structures;
  • Castik Capital portfolio company Waterlogic on bolt-on acquisitions and its capital structure; the portfolio companies of various sponsors on matters impacting their capital structures, including management sell-down, Eurobond listings, capital resets and simplifications;
  • TPG Capital on its acquisition of TSL Education from Charterhouse Capital Partners; and
  • TPG Capital on its acquisition of a majority stake in Victoria Plumb from the Walker Family.



  • Legal Practice Course, The College of Law Moorgate, London, 2007
  • M.A. (Law), Trinity Hall, University of Cambridge, 2006


  • England & Wales
  • Solicitor, England & Wales