Katja Butler | White & Case LLP International Law Firm, Global Law Practice
Katja Butler
Katja Butler

Katja Butler

Associate, London

T +44 20 7532 2231

E katja.armstrong@whitecase.com


Katja is an associate in our London office's corporate practice and specialises in private equity, with a focus on portfolio assistance.

Katja advises financial sponsor clients and their portfolio companies on all aspects of leveraged M&A, capital structuring and general advisory workstreams.

Katja leverages her broad experience to advise portfolio companies on all aspects of their capital structures and other strategic matters, ranging from executive hiring and dismissals to new incentive schemes, reorganisations and loan note listings, redemptions and buy-backs.

Bars and Courts

  • Solicitor of England and Wales


  • MA, Law, Trinity Hall, Cambridge


  • English


HgCapital on the acquisitions of Kinapse, Sovos Compliance, Raet, and The Foundry.

HgCapital on its sell down of a minority stake in JLA and a refinancing of the business.

HgCapital on its reinfinancing and equity recapitalisation of portfolio company IRIS.

HgCapital portfolio company Ullink on its acquisition of Nyfix / Metabit businesses from ICE.

Castik Capital portfolio company Waterlogic on its acquisition of PHS.

Advising in relation to contentious high profile management leaver, including settlement terms and repatriation of equity.

Implementing management equity incentive programmes for cross-border portfolio clients.

Simplification of portfolio group structure, including Eurobond listing, liquidations in various jurisdictions, insertion of new holdco and management sell-down.

Advising in relation to the terms of licence and franchise arrangements for a corporate with joint ventures in Asia.

Advising in relation to potentially contentious termination of contracts by portfolio companies, including strategy and next steps advice.