Jane Street Capital
| Company type | Private |
|---|---|
| Industry | Proprietary trading |
| Founded | 1999 |
| Founder | Tim Reynolds, Rob Granieri, Marc Gerstein, Michael Jenkins |
| Headquarters | New York City , United States |
Area served | Global (New York City, London, Hong Kong, Amsterdam, Chicago, Singapore) |
| Products | Trading in equities, fixed income securities, ETFs, options |
Number of employees | 2600+ (2021) |
Jane Street Capital is a proprietary trading company based in New York City, United States. It has a workforce exceeding 2,600 employees spread across six global offices located in New York City, London, Hong Kong, Amsterdam, Chicago, and Singapore. The firm actively trades a diverse array of asset classes on more than 200 trading platforms across 45 countries.
Recognized as a prominent market-maker, Jane Street executed trades exceeding $17 trillion in securities during 2020. The company was instrumental in providing liquidity for bond ETFs amid the market disruptions experienced that year.
History
Established in 1999, Jane Street was founded by Tim Reynolds, Rob Granieri, Marc Gerstein, and Michael Jenkins. Prior to founding the firm, Reynolds, Granieri, and Jenkins were traders at Susquehanna International Group. In 2012, Tim Reynolds stepped away from his leadership role within the company.
Activities
By the close of 2020, Jane Street had facilitated trading volumes of $4 trillion in global equities, $1.4 trillion in fixed income securities, and $3.9 trillion in ETFs. The firm's revenue increased by 54% during the fiscal year ending March 2021, reaching an unprecedented $10.6 billion amid the COVID-19 pandemic.
As of 2021, Jane Street’s trading capital stood at approximately $15 billion. Although it is primarily recognized for high-frequency trading, the firm occasionally maintained positions for extended periods—ranging from several hours to weeks—particularly to support ETFs that track markets with lower liquidity. On average, daily holdings amounted to $50 billion. Jane Street serves as an authorized participant for 2,600 ETFs and acts as the lead market-maker on 506 ETFs, playing a vital role in ensuring ETF liquidity.
In 2023, the company reported net trading revenues of $10.6 billion and adjusted earnings totaling $7.4 billion. These figures were revealed during a debt issuance aimed at boosting its cash reserves from $4.3 billion to $5.6 billion.
In June 2025, co-founder Robert Granieri became involved in allegations concerning funding an attempted coup in South Sudan; however, he asserted that he was misled into financing arms procurement.
In July 2025, the Indian regulatory authority SEBI accused Jane Street Capital of orchestrating a "sinister scheme," resulting in the seizure of over $550 million attributed to purported illicit profits and suspension of its operations within India—a market where the firm reportedly generated around $2 billion over two years. Jane Street refutes these claims. SEBI contends that the firm engaged in market manipulation via an "intra-day index manipulation strategy," which entailed taking long positions in BANKNIFTY and its constituent stocks while simultaneously holding larger short option positions on days when options expired. The strategy allegedly yielded substantial profits on options trades despite losses on stock positions after closure. Additionally, SEBI accused Jane Street of engaging in circular trading involving its India-registered entities as part of this scheme.
Technology
Nearly all software developed by Jane Street is written using the OCaml programming language. Their codebase encompasses approximately 70 million lines of code, underscoring considerable investment in proprietary technological infrastructure.
Leadership and culture
Jane Street functions without a traditional CEO role, instead employing a "functionally-organized structure" supported by multiple management and risk committees. Employee compensation is linked to the firm’s overall profitability rather than individual trader performance. Leadership responsibilities are informally shared among a group of 30 to 40 senior executives.
The company places strong emphasis on risk management related to rare but potentially devastating market events, allocating between $50 million and $75 million annually toward put options as part of its extensive hedging framework.
Legal Actions
In April 2024, Jane Street initiated legal proceedings against Millennium Management, accusing the firm of misappropriating its trading methodology via former employees Douglas Schadewald and Daniel Spottiswood. The contested approach, which concentrated on options trading within the NSE/BSE Indian markets, was reported to have produced approximately $1 billion in revenue during 2023.
Investigation into India Derivatives Market (2025)
In July 2025, the Securities and Exchange Board of India (SEBI) enacted a temporary prohibition preventing Jane Street and its related entities from engaging in trading activities within Indian securities markets. This action followed allegations of expiry-day manipulation concerning the Bank Nifty index through synchronized transactions across cash, futures, and options segments. SEBI subsequently froze assets totaling around ₹4,843 crore (equivalent to US $567 million) suspected to be illicit profits. Jane Street complied by placing these funds in escrow but disputed SEBI’s claims, asserting that its conduct constituted legitimate index arbitrage.
Once the escrow arrangement was secured, SEBI removed the trading ban; nonetheless, Jane Street refrained from resuming market operations, citing existing commitments to abstain from options trading—a fundamental element of its strategy. The scope of the inquiry broadened to include six affiliated firms and examined transaction records spanning January 2023 through May 2025.
Additionally, India’s Income Tax Department scrutinized documentation related to Jane Street’s domestic activities and its partner company Nuvama Wealth for possible breaches of tax treaties and anti-avoidance regulations. Reports emphasize Jane Street’s offshore financial structuring combined with a minimal presence of personnel within India.
The investigation exerted considerable influence on the Indian derivatives sector, triggering a notable contraction in Bank Nifty options trading volumes. SEBI Chair Tuhin Kanta Pandey has advocated for comprehensive structural reforms aimed at enhancing market integrity and safeguarding retail investors. Jane Street continues to reject any misconduct allegations and intends to submit a formal response within the designated regulatory timeframe.
Distinguished Former Personnel
- Sam Bankman-Fried and Caroline Ellison, both associated with the misappropriation of FTX customer assets, previously served at the firm.
- Brett Harrison, currently leading as CEO of Architect Financial Technologies, a trading technology company
- Zvi Mowshowitz, an author focused on developments in artificial intelligence
- Ophelia Bauckholt, a late quantitative trader connected to the Zizian rationalist community who interned at Jane Street during her undergraduate education