Zachary Chroman

Zachary (Zack) Chroman is a mathematician and trader. He represented the United States at the International Mathematical Olympiad in 2017, winning a silver medal, and was a 2017 U.S. Mathematical Olympiad winner while a student at The Nueva School in San Mateo, California. He earned a B.S. in Mathematics from MIT (2018-2021) and an MASt in Mathematics from the University of Cambridge (2021-2022). He was a PRIMES high-school researcher (2016) and co-authored the combinatorics paper "Lower bounds for superpatterns and universal sequences" (arXiv 2020). His employment record centers on Jane Street, the market-making/quantitative trading firm, where FINRA shows registered roles with Jane Street Capital, LLC and Jane Street Options, LLC, and on a 2019 quantitative research internship at Matrix Operations LLC, an algorithmic-trading/mathematical-modeling firm.

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• Quant employment verification: CONFIRMED. Zachary D. Chroman (FINRA CRD# 7273978) has a FINRA-confirmed registered employment history with Jane Street Capital, LLC (08/2022-04/2024) and Jane Street Options, LLC (07/2021-09/2021), plus Jane Street Capital (06/2021-09/2021). Jane Street is a proprietary market-making and quantitative trading firm, so the roles sit squarely in quantitative finance. A 2019 Quantitative Research Intern role at Matrix Operations LLC is index-only (LinkedIn index, not independently confirmed), but Matrix Operations is classified as quantitative finance: its own site describes it as an AI/mathematical-modeling/software firm and its LinkedIn company page lists industry 'Capital Markets' with a founder describing algorithmic trading strategies. Identity is supported by independent records (IMO 2017 US team, Nueva School, MIT math, Cambridge MASt) that align with the LinkedIn index record carrying these roles. Student/competition programs (IMO, USAMO, PRIMES, ESP teaching) are excluded from this count.Apr 1, 2024
• FINRA BrokerCheck shows he is 'not currently registered' as a broker, with his Jane Street Capital registration ending 04/2024; this does not by itself prove employment ended, but the current-employment claim rests only on an index record and should not be treated as confirmed.Apr 1, 2024
• Represented the United States at the International Mathematical Olympiad 2017 in Rio de Janeiro, winning a silver medal (rank 49, 24 points).Jul 1, 2017
• Named one of 12 winners of the 2017 U.S. Mathematical Olympiad and one of six students selected for the U.S. IMO team, as a rising senior at The Nueva School in San Mateo, CA.Jun 7, 2017
• Nueva School alumni magazine (Fall/Winter 2023) reports 'Zack Chroman moved to New York City... He is working for a trading firm, Jane Street,' a school-published corroboration of his Jane Street employment around 2023.Nov 1, 2023
• Two FINRA registration windows overlap in mid-2021 (Jane Street Capital 06/2021-09/2021 and Jane Street Options 07/2021-09/2021); the LinkedIn index separately dates a 'Quantitative Trading Intern' role to summer 2020, so the internship-to-registration dates do not line up and the index internship date is unverified.Sep 1, 2021
• Co-authored 'Lower bounds for superpatterns and universal sequences' with Matthew Kwan and Mihir Singhal (arXiv:2004.02375, submitted Apr 2020; published in J. Combinatorial Theory), disproving Arratia's conjecture on k-superpatterns.Apr 6, 2020
• Matrix Operations LLC (matrixops.com) is a privately held AI/mathematical-modeling/software company; its LinkedIn company page lists industry 'Capital Markets', which supports classifying the 2019 'Quantitative Research Intern' role as quantitative-finance-adjacent rather than merely a name containing 'quant'.
• Presented 'Rational Embeddings of Convex Polyhedra' with mentor Sheela Devadas at the 6th Annual MIT PRIMES Conference (May 2016), a high-school research program.May 21, 2016
• Education: B.S. Mathematics, MIT (2018-2021); MASt Mathematics, University of Cambridge (2021-2022); The Nueva School (2014-2018) — from the LinkedIn index record; IMO/USAMO and PRIMES records independently corroborate the Nueva School and MIT math path.
• Taught a MIT ESP HSSP Spring 2019 class titled 'A Lot of Meta-Mathematics' (class M12825) as an MIT undergraduate.Feb 23, 2019
• Graded for The Art of Problem Solving (2018-2019) per the LinkedIn index, consistent with his competition-math background (index-only claim).Jan 1, 2019