Jane Street Capital is an American multinational quantitative trading firm headquartered in New York. It employs approximately 3,000 people across its global offices, located in New York, Singapore, London, and Hong Kong.
Jane Street originally traded American depositary receipts (ADRs), but has since traded exchange-traded funds (ETFs), commodities, index, fixed income, and derivative products. The firm does not maintain a standard management structure, with its workforce and leadership co-operating like an âÂÂanarchist communeâÂÂ.
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. Jane Street was sued by Susquehanna for poaching top talent with proprietary information, but no action has been taken since the filing. Granieri is the only founder still at the company, as of 2026.
The company is informally led by a group of 30 or 40 senior executives and has historically not maintained a CEO. All employees are paid based on the firm's collective profits, not personal trading gains.
In 2025, Jane Street employs approximately 3,000 employees, with its headquarters located in New York CityâÂÂs Financial District's 250 Vesey Street.
In November 2020, Jane Street hosted a market prediction competition with a $100K prize pool that ran until August 2021. 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.
Jane Street uses OCaml for its operations, contributing to open-source libraries, including an open-source OCaml compiler. Jane StreetâÂÂs use of OCaml has been paired with increased operational reliance on Python for machine learning.
Jane Street traded ADRs before moving into equity options and ETFs, with ETFs becoming the main focus. Throughout the late 2000s, Jane Street started trading fixed income, futures, commodities, and equity options.
Jane Street is not known for creating detailed year-long plans. 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. In 2024, Jane Street averaged $2 trillion in equity trading volumes per month.
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.
In 2022, Jane Street held an $8.1 million position on commodities, increasing to $16.6 million in 2023. In Jane StreetâÂÂs 2024 bond docs, they did not publicly state their intent to expand into commodities.
In 2024, Jane Street averaged $230 billion in monthly fixed income trading volume.
In 2024, Jane Street was responsible for around 8% of Options Clearing Corporation's transactions.
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 $61.3â¯million for stock flow and $15.2â¯million for derivatives to Robinhood Markets as a fee to control order flow.
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. The suit was settled in December 2024 for an undisclosed amount.
In July 2025, SEBI alleged that Jane Street used multiple entities to manipulate the market and barred Jane Street from accessing the market. 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.
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. Jane Street denied all wrongdoing, stating it was basic index arbitrage. Later that year, Jane Street was temporarily banned by the Securities and Exchange Board of India (SEBI) for alleged market manipulation.
Jane Street faced scrutiny in June 2025 over its co-founder, Robert Granieri, facing allegations of funding an attempted coup against South Sudan by Peter Ajak and Abraham Keech. The matter was resolved with no charges being brought against Granieri.