Marius Stensrud

Marius Stensrud is a Norwegian mathematician and quantitative researcher. He represented Norway at the International Mathematical Olympiad in 2016 (Honourable Mention, 11 points, rank 379) and 2017 (Bronze medal, 16 points, rank 265), and won Norway's national Abelkonkurransen mathematics competition in 2017 as an 18-year-old from Ski. He studied Mathematics at the University of Cambridge (BA, then Master's). His professional record, per index-derived LinkedIn enrichment, comprises research internships (cryptanalysis of AES at the Norwegian National Security Authority, 2018; mathematical modelling at Spacemaker AI, Oslo, 2019), a Quantitative Research internship at Jump Trading (London, 2020), and four years as a Quant Researcher at Citadel Securities in London (2021-2025) followed by a New York-based Quant Researcher role from 2025. Employment details are index-derived and not independently primary-source confirmed.

Notes4

• Quant employment verification: CONFIRMED. Index-derived LinkedIn enrichment (ClickHouse index) shows two actual quantitative-finance roles: 'Quant Researcher' at Citadel Securities (London, 2021-2025, then New York, 2025-present) and a 'Quantitative Research Intern' at Jump Trading LLC (London, 2020). Both employers are established quantitative trading / market-making firms: Citadel Securities is a major market maker and Jump Trading is a proprietary high-frequency trading firm. Identity is supported by the IMO primary source (Norwegian Olympiad participant, Cambridge mathematics), matching the brief. Caveat: the employment claims themselves are index-derived only (not primary-source confirmed), so the roles are treated as confirmed on index evidence with that limitation stated.Jul 2026
• Confirmed as identical to the Olympiad identity: imo-official.org participant 26832 is 'Marius Stensrud' on Norway's IMO teams in both 2016 and 2017, and Universitetsavisa (2017-03-07) names the Abelkonkurransen 2017 winner as an 18-year-old from Ski who planned to study at Cambridge - matching the Cambridge mathematics degree and the Norwegian/English language profile.Mar 7, 2017
• Index-only: the employment timeline (Cryptanalysis research intern at Nasjonal sikkerhetsmyndighet 2018, Data Science intern at Spacemaker AI 2019, Jump Trading quant research intern 2020, then Citadel Securities quant researcher 2021-2025 and 2025-present) is a continuous quantitative trajectory, but all role rows are sourced from the index-derived LinkedIn enrichment and are not independently primary-source confirmed.Jul 2026
• Primary-source competition record independent of LinkedIn: won Abelkonkurransen 2017 (Norway's national math competition) after placing second in 2016, receiving NOK 15,000; the win was announced at the Abel Prize ceremony where the Minister of Education presented the prize.Mar 7, 2017
• Index-only: the Jump Trading 'Quantitative Research Intern' (2020) sits immediately before the 2021 Citadel Securities start, and both are London-based, consistent with an intern-to-full-time transition; this is a pattern read from the two dated index roles, not a documented recruiting mechanism.2020
• The Galois/cryptanalysis internship at Nasjonal sikkerhetsmyndighet (Norwegian National Security Authority) involved research on cryptanalysis of AES and discrete mathematics - a defence/signals-intelligence research role, distinct from the later finance roles.2018
• Listed as a 2017 International Olympiad in Informatics (IOI) contestant for Norway with score 0.00, indicating additional Olympiad participation beyond mathematics in the same period.2017