Taejoo Ahn

Taejoo Ahn is a quantitative researcher at IMC Trading in Chicago. He earned a PhD in Statistics from UC Berkeley in 2024 (entered 2018; advisors Aditya Guntuboyina and Song Mei; dissertation "Near-optimal multiple testing procedure in Bayesian linear models") and a bachelor's degree in mathematics and economics from Seoul National University in 2018. As a schoolboy in the Republic of Korea he won a silver medal at the 2009 International Mathematical Olympiad (29 points, rank 62).

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• Quant employment verification: CONFIRMED. Taejoo Ahn holds an actual quantitative-finance role: current Quantitative Researcher at IMC Trading (Chicago, 2024-present), a proprietary trading firm / market maker (IMC Trading, imc.com, is a global market maker, not a company merely containing 'quant' in its name). Corroborating identity: the same name/company appears in FINRA BrokerCheck and Advisorcheck, where he is a Registered Representative at IMC FINANCIAL MARKETS, Chicago, registered 2024, having passed the Series 57TO (Securities Trader) and SIE exams; a 2024 registration date is consistent with the 2024 role start. This is supported by both a LinkedIn/index profile and independent FINRA/Advisorcheck registration records. No prior quant employment (internships or full-time) was found; the only documented role is the current IMC one.
• PhD in Statistics from UC Berkeley, graduated 2024, entered 2018; dissertation 'Near-optimal multiple testing procedure in Bayesian linear models'; advisors Aditya Guntuboyina and Song Mei; he is listed both as a current PhD student and later as a PhD alumnus.
• Identity linkage is indirect: no single public page ties the IMO-2009 Korean contestant to the Berkeley statistician and IMC researcher. The match rests on the exact full name, the shared mathematics background (IMO silver medalist -> SNU mathematics/economics -> Berkeley statistics), and the consistency of the timeline; it is a strong but not primary-source-documented identification.
• Silver medal at IMO 2009 representing the Republic of Korea, 29 points (P1 7, P2 7, P3 1, P4 7, P5 7, P6 0), rank 62 of 565; recorded by the official IMO results and mirrored by moresults.org and bariz.org.
• Registered with FINRA as a Registered Representative at IMC Financial Markets (Chicago), CRD# 7976028, started in finance in 2024, holding the Series 57TO and SIE exams; BrokerCheck and Advisorcheck record him as 'Taejoo Ahn', alias 'Tae Joo Ahn'.
• Bachelor of Science in mathematics and economics, Seoul National University, 2018 (per the Simons Institute bio), which places his undergraduate study in 2011-2018 per the index.
• First-authored research paper 'Near-optimal multiple testing in Bayesian linear models with finite-sample FDR control' (arXiv:2211.02778), with Licong Lin and Song Mei (his Berkeley advisor), submitted 2022 and revised 2023.
• Visiting Graduate Student at the Simons Institute for the Theory of Computing (UC Berkeley) across three programs: Probability, Geometry, and Computation in High Dimensions (Fall 2020); Computational Complexity of Statistical Inference (Fall 2021); and Geometric Methods in Optimization and Sampling (Fall 2021).
• A distinct namesake, Tae Joo Ahn, is a Seoul-based plastic surgeon with published aesthetic-surgery papers (SUI plastic surgery); search results for the name must be filtered against this person, who is not the quant/statistician.
• The task's supplied identity key 'taiga-640892542' and the 'start 2024-08' role both point to the same person; the LinkedIn profile confirms IMC Trading as the current employer, consistent with the unverified lead.
• GitHub account 'taejoo-ahn' hosts FDR_Bayes_figures (figures for his Bayesian-FDR multiple-testing paper), linking the code account to his statistics research; a small account with no other public activity.