Ceinwen Rees

Ceinwen is very intellectually acute and really has a thorough understanding of very technical legislation and changes. - Chambers UK, 2026

Ceinwen Rees is a tax partner in the London office of Kirkland & Ellis International LLP. She is widely recognized as a leading UK tax lawyer, combining her extensive market knowledge with legal and tax technical experience. Ceinwen’s proficiency in tax and structuring is notably broad, enabling her to provide sophisticated advice to investment fund managers across their life cycles, from fundraising, carried interest and co-invest to deployment and eventual realisation.

Ceinwen has a particular focus on strategic transactions undertaken at the level of the fund manager and works with clients to prepare themselves for these liquidity events as well as on the structuring and implementation of such transactions. She also works with clients to navigate HMRC enquiries arising in this space, especially around UK partnership issues and carried interest.

Ceinwen is recognized in both The Legal 500 UK and Chambers UK as a leading individual, where she is described as an “outstanding” practitioner and as someone who “breaks down concepts, explains them in an easily understandable manner and comes up with commercial practical solutions.” Ceinwen is an active member of the BVCA’s carried interest reform technical working group and also teaches at Oxford University on the M.Sc. in Taxation. 

Representative Clients

BC Partners, Bridgepoint, Brightstar Capital, Coller Capital, Oaktree, GI Partners, Hellman & Friedman, Lone Star, Permira, Strategic Value Partners

External Recognition

• Chambers & Partners UK and The Legal 500 UK: Recognised as a Leading Lawyer (2026)