Sir Paul Roderick Clucas Marshall (born 2 August 1959) is a British hedge fund manager, philanthropist, right-wing activist, and media baron.

His ownership of UnHerd and GB News led the New Statesman to name him as the seventeenth most powerful right-wing political figure in the UK in 2023.

[11] When his parents moved to the Philippines and then South Africa for his father's job with Unilever, Marshall boarded at Merchant Taylors' School, in England.

[12] From there he went to St John's College, Oxford, to read history and modern languages, and subsequently took an MBA from INSEAD business school in Fontainebleau, France.

Laws, describing the pair's ambition in publishing The Orange Book, wrote "We were proud of the liberal philosophical heritage of our party.

But we both felt that this philosophical grounding was in danger of being neglected in favour of no more than 'a philosophy of good intentions, bobbing about unanchored in the muddled middle of British politics'"[24] The book attracted initial controversy when launched,[25][26] but both it and the term Orange Bookers to describe those sympathetic to its outlook continue to be frequently referenced to describe a strand of thought within the Liberal Democrats.

[33][34] Following the resignation of Andrew Neil in September 2021, Marshall temporarily replaced him as chairman,[35][36] before being succeeded by Alan McCormick in April 2022.

[38][39] Working with Jordan Peterson and Baroness Stroud, Marshall helped create Alliance for Responsible Citizenship, giving a keynote address at its first conference in October–November 2023.

[40] In February 2024 the advocacy group Hope not Hate called attention to Marshall's activity on an anonymous Twitter account.

[41][42][43] He had liked tweets which contained climate denialism, which called for "mass expulsions" of immigrants, and which predicted civil war "once the Muslims get to 15–20%".

[50] In April 2024, he stood down as chair and trustee of Ark Schools to focus on "other philanthropic and business commitments" after being accused of liking and sharing far-right extremist social media posts and conspiracy theories.

[55] Marshall and Hughes-Hallett had previously collaborated on the Philanthropy Review, where they identified a lack of comprehensive research into the efficacy of private contributions to public welfare.

Contributors included Labour MP Frank Field, Professor Chris Husbands of the Institute of Education and Stephen Machin of the London School of Economics.

He is also co-author of Aiming Higher: a better future for England's schools with Jennifer Moses (2006), and author of Tackling Educational Inequality (with Sumi Rabindrakumar and Lucy Wilkins, 2007).

[60] Marshall's other publications include: The Market Failures Review (Editor – 1999), Britain After Blair (co-editor with Julian Astle, David Laws, Alasdair Murray) and Football and the Big Society (with Sam Tomlin, 2011).

The Times described the book as "a bit of a gem"[62] and a Bloomberg review welcomed its examination of cognitive bias, the use of data and systematic strategies by successful fund managers.

Marshall is married to Sabina de Balkany, a French national, who owns an antique shop on the King's Road in Chelsea.