Thomas Orton

Computer scientist and quantitative researcher; IOI 2015 bronze medalist (South Africa); Harvard CS+Math and Statistics; Oxford DPhil in Computer Science (2023); past quantitative researcher at Xantium Group - Tudor Investment Corporation and intern at The D. E. Shaw Group.

Notes9

• Quant employment verification: CONFIRMED. Identity is supported by multiple independent primary sources (thomasorton.info personal site, the Oxford CS department page, IOI official statistics, and a GitHub repo matching his thesis), and the role history shows an actual internship and employment, not merely student programs: Quantitative Researcher Intern at The D. E. Shaw Group (New York, 2022, forecasting model with a full-time return offer) and Quantitative Researcher / Quantitative Researcher VP at Xantium Group - Tudor Investment Corporation (London 2023-2025, Abu Dhabi 2026-present). Both employers are verifiably quantitative firms: Xantium's own site describes systematic, quantitative strategies and an efinancialcareers headline calls it a quant hedge fund (spun out of Tudor); D. E. Shaw is a quantitative hedge fund. Caveat: the specific role/dates rest on the LinkedIn-derived index only - no independent primary source names him at either firm - but there is no conflicting evidence. The Olympiad identity and the quantitative-investment career path cohere.
• Primary-source identity confirmation: thomasorton.info (self-described as 'Tom', a website from his PhD years) states he started a DPhil in Computer Science at Oxford in 2019 as a Future of Humanity Institute DPhil Scholar; the Oxford CS department lists him as a student; IOI official statistics record Thomas Orton competing for South Africa at IOI 2015; and the GitHub repo 'Thomas-Orton/chess-precomputation' matches his thesis topic of precomputation in games.
• PhD thesis: 'Computationally Bounded Rationality From Three Perspectives: Precomputation, Regret Tradeoffs, And Lifelong Learning', Thomas Orton, St Hugh's College, University of Oxford, submitted for the DPhil, Trinity 2023 - three models of bounded rationality (precomputation in games, regret tradeoffs, lifelong learning).2023
• Public contact: personal site publishes the email [contact omitted] (written as thomas (dot) orton (at) cs (dot) ox (dot) ac (dot) uk).
• Olympiad record (primary source): IOI official statistics show Thomas Orton competing for South Africa at IOI 2015 (score 45.45, absolute rank 54), and cphof.org records an IOI 2015 bronze medal plus IOI 2014 participation (rank 217, no medal).2015
• Authored/co-authored research: 'Trading Off Resource Budgets For Improved Regret Bounds' (NeurIPS 2022, arXiv:2210.05789) and 'Modeling Precomputation In Games Played Under Computational Constraints' (IJCAI 2021, arXiv:2105.09145) - the regret-bounds and precomputation work is directly adjacent to quantitative decision-making under computational limits.
• Employer classification: Xantium Group - Tudor Investment Corporation is a genuine quantitative investment firm - xantium.com describes teams running 'systematic, quantitative and discretionary / fundamental strategies across global markets', and it is a spin-out of Tudor Investment Corporation (an efinancialcareers piece heads it 'the best quant hedge fund you've never heard of').
• Employer classification: The D. E. Shaw Group is a well-known quantitative hedge fund (domain deshaw.com), so the 2022 'Quantitative Researcher Intern' role there is a bona-fide quantitative-finance internship if the index role record holds.
• Cross-source read: the Xantium role (from Sept 2023) begins immediately after his Oxford DPhil was submitted (Trinity 2023), and his personal site is explicitly left unmaintained as 'from my time as a PhD student' - the public-research footprint stops exactly where the industry role begins, consistent with a move from academia into a quant desk rather than concurrent academic activity.
• School and team context: a Computer Olympiad news post names 'Thomas Orton from Bishops, Cape Town' as one of four South African team members at the 27th IOI (Kazakhstan, 2015) who each won a bronze medal (the other three: Ulrik de Muelenaere, Yaseen Mowzer, Robin Visser).Aug 3, 2015
• GitHub account Thomas-Orton, whose repo chess-precomputation aligns with his DPhil thesis on precomputation in games, and Anime-SRGAN matches the 'GAN model for upscaling Anime Videos' project listed on his personal site - a corroborating signal for the account's ownership.
• Personal site lists a self-written 'survey on regret minimization for financial portfolios' - an academic bridge between his online-learning/regret-minimization research and financial applications.