Ognjen Tošić

Ognjen Tošić is a mathematician and quantitative researcher. He competed for Serbia at the International Mathematical Olympiad in 2015, 2016 and 2017, winning bronze, bronze and silver. He received a BA and MMath in Mathematics from the University of Cambridge (2017-2021) and a DPhil in pure mathematics from the University of Oxford (2021-2024) under Vladimir Markovic, working on harmonic maps and Teichmuller spaces. A LinkedIn-derived index lists quantitative research internships at Jump Trading (2020), G-Research (2021) and Citadel (2023) and a current Quantitative Researcher role at G-Research from 2024.

Notes5

• Quant employment verification: CONFIRMED. Identity corroborated across three independent source families: the IMO official record for 'Ognjen Tošić' (Serbia, 2015/2016/2017), a personal Google Sites academic page (Oxford DPhil in mathematics 2021-2024; BA+MMath Cambridge), and a LinkedIn-derived index profile (DPhil Oxford 2021-2024; BA/MMath Cambridge) carry the same name and the same Cambridge-to-Oxford mathematics path. Actual roles/internships are present in the LinkedIn-derived index (G-Research Quantitative Researcher 2024-, plus quantitative research internships at Citadel, G-Research, Jump Trading), and the identity is supported by the matching name/education on the personal site and the IMO record. Employers classification: G-Research is a quantitative research/technology firm, Citadel is a hedge fund, Jump Trading is a proprietary trading/market-making firm (all quantitative finance); Microsoft Development Center Serbia is a software development center, NOT quantitative finance. Caveat: the employment entries are index-only (LinkedIn-derived) and were not independently confirmed by company primary pages.2024
• INDEX-ONLY (LinkedIn-derived index, not independent primary confirmation): profile lists Quantitative Researcher at G-Research, London, from 2024 (current at index snapshot) - the role begins immediately after the Oxford DPhil ends in 2024.2024
• INDEX-ONLY: past internships listed as Quantitative Research Intern at Citadel (2023, Global Fixed Income, London), Quantitative Research Intern at G-Research (2021, London), Quantitative Research Intern at Jump Trading LLC (2020, London), and Software Engineer Intern at Microsoft Development Center Serbia (2018, Belgrade).2023
• Personal site states he completed a DPhil in pure mathematics at the University of Oxford 2021-2024 under Vladimir Marković, after a BA and MMath at Cambridge - an independent primary source that anchors the education timeline.2024
• Research area is harmonic maps and Teichmuller spaces, with 8 listed publications/preprints in journals including Advances in Mathematics, Journal of Topology, IMRN, and Experimental Mathematics.2024
• IMO record: 2017 Serbia, rank 82, silver medal (21 pts); 2016 Serbia, rank 224, bronze (17 pts); 2015 Serbia, rank 160, bronze (17 pts).2017
• Authored 'Non-strict plurisubharmonicity of energy on Teichmuller space', published in International Mathematics Research Notices (arXiv 2305.05626, submitted May 2023).May 9, 2023
• Personal site publishes the DPhil thesis via Oxford ORA (uuid 4eb4820a-9b2d-4335-94a1-603805dfef91).2024
• Index snapshot (last active 2026-08-27): 175 LinkedIn connections, 184 followers.Aug 27, 2026