Jane Street Capital is an American-based, private quantitative trading firm. Jane Street employs approximately 3,000 people across its global offices, located in New York, Singapore, London, and Hong Kong.[4]
Jane Street was co-founded by Tim Reynolds, Robert Granieri, Marc Gerstein, and Michael Jenkins in 1999. Reynolds, Granieri, and Jenkins were former traders at Susquehanna International Group, while Gerstein was a developer at IBM.[8] Jane Street was sued by Susquehanna for poaching top talent with proprietary information, but no action has been taken since the filing.[8] Robert Granieri is the only founder still at the company, but Jane Street does not have a CEO. The company is informally led by a group of 30 or 40 senior executives[5], and all employees are paid based on the firm's collective profits, not personal trading gains.[9]
In 2025, Jane Street employs approximately 3,000 employees[10], with its headquarters located in New York City’s Financial District's 250 Vesey Street.[11]
Outreach
Former and current executives partially attribute Jane Street’s success to their love of puzzles.[12] Every one or two months, Jane Street releases a puzzle to the public to solve, displaying contestants who submitted correct solutions on its website.[13] Jane Street holds in-person events including SEE, AMP, INSIGHT, and FTTP, which range from day-long to weeks-long, teaching students STEM-related topics for quantitative trading.[14]
In November 2020, Jane Street hosted a market prediction competition with a $100K prize pool that ran until August 2021.[15] The stock trading data in the Jane Street dataset provided for this competition has been used in research studies aimed at improving trading decision-making.[16]
Technology
Jane Street uses OCaml for its operations, contributing to open-source libraries, including an open-source OCaml compiler.[17] Jane Street’s use of OCaml has been paired with increased operational reliance on Python for machine learning.[18]
Controversies
Jane Street has been in several legal controversies with regulators and competitors in foreign markets.
Securities and Exchange Board of India
In July 2025, SEBI alleged that Jane Street used multiple entities to manipulate the market and barred Jane Street from accessing the market.[19][20] On July 14th, 2025, the company has put $560 million into an escrow account as part of a request to the Securities Appellate Tribunal to resume trading activities.[21]
SEBI accuses Jane Street of using one entity to acquire substantial quantities of bank stocks at market open, increasing the value of the Bank Nifty index, while a separate entity simultaneously held derivatives that would benefit from a later decline in that index. Near the expiry of the derivatives, the bank stocks were allegedly sold by Jane Street, causing a decline in the Bank Nifty and generating profits from the derivatives.[22][23] Jane Street has denied all wrongdoing, stating it was basic index arbitrage. [21]
Millennium Management
Jane Street filed suit against two former Jane Street employees at Millennium Management, accusing them of stealing trade secrets, primarily of its Indian market operations.[5][24] The suit was settled in December 2024 for an undisclosed amount. [24]
South Sudan
Jane Street faced scrutiny in June 2025 over its co-founder, Robert Granieri, facing allegations of funding an attempted coup against South Sudan by Ajak and Abraham Keech[25][26]. The matter was resolved with no charges being brought against Granieri.
Jane Street is not known for creating detailed year-long plans.[6] Instead, Jane Street expands into neighboring markets incrementally. In the second quarter of 2025, Jane Street reported $10.1 billion in net trading revenue and $6.9 billion in net profit, setting a record for the highest trading revenue in a quarter. [27] In 2024, Jane Street averaged $2 trillion in equity trading volumes per month. [28]
Exchange-Traded Fund
In 2024, Jane Street accounted for 41% of the bond ETF trading volume. It held 24% of the primary US-listed ETFs, 16% in the non-primary market US-listed ETFs, and 17% of secondary market activity in Europe. [29]
Commodity
In 2022, Jane Street held an $8.1 million position on commodities, increasing to $16.6 million in 2023. In Jane Street’s 2024 bond docs, they did not publicly state their intent to expand into commodities.[6]
Fixed Income
In 2024, Jane Street averaged $230 billion in monthly fixedincome trading volume. [30]
In August 2025, Jane Street handled the second most non S&P 500 orders and third most S&P 500 for Robinhood Markets. Jane Street paid $61.3 million for stock flow and $15.2 million for derivatives to Robinhood Markets as a fee to control order flow. [31]
↑Patterson, Scott; Rogow, Geoffrey (August 1, 2009). "What's Behind High-Frequency Trading". The Wall Street Journal. Archived from the original on April 11, 2021. Retrieved April 2, 2019.
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