Industry Recognition
Innovation in a competitive and efficient marketplace
OneChronos operates a dark U.S. equities ATS that facilitates trading by hosting auctions on average 10-20 times per second throughout the trading day. Within each auction, instead of using price/time priority OneChronos matches inbound orders in a manner that maximizes the notional price improvement achievable across participants creating a new regime of competition that leads to unique liquidity opportunities and high quality performance.
The platform's seamless integration with existing market structure has driven rapid adoption, enabling firms to easily access enhanced execution capabilities through their current workflows. In addition to growth of adoption, our model has received accolades from our customers and industry participants:
- 2025 TabbFORUM NOVA Award for Top Innovators Across Financial Markets
- 2024 Award of Crossing Network of the Year from The Trade
- 2024 Award for Innovation in Trading and Finance from the Security Traders Association of New York
Standard Workflow
A plug-and-play solution for broker algorithms, routers and DMA suites.
Limited Adverse Selection
Time randomized periodic auctions reduce gamability and help to align like-minded traders on short time horizons.
Optimize for Execution Quality
OneChronos matches orders independent of when they arrive in the order book. It operates a "Smart Market" which leverages optimization techniques to find matching solutions that solve for outcome traders care about.
Information Leakage Protection on a Pre and Post Trade Basis
No data feeds or pre-trade transparency facilitate a truly dark trading experience. Multi-lateral prints are aggregated when disseminated to the market helping to mitigate information leakage even after trades hit the tape.
Standard workflow, game changing paradigm
- Point-in-time auctions every ~100ms throughout the trading day
- Match priority based on aggregate notional price improvement contributed
- All matches are within or at the NBBO at a single clearing price per symbol
- Customizable constraints to isolate specific execution objectives
- Fully non-displayed. No data feeds. Firm orders only. Multilateral fills
- Seamless fit in today’s algorithm & routing workflows. Standard order types supported, in addition to those unique to OneChronos. All orders via FIX 4.2
- Single auction process spanning all orders & eligible NMS securities
- Differentiated liquidity, customized fills, unique trading opportunities
Blog
Research Insights
July 2026
Pairs Without Legging Risk: Leg 2
In this second "leg" of a two-part series, we examine the economics of mitigating legging risk. A pairs trader may go off the lit markets in search of unique liquidity, or unique spreads. Here we show legging risk can erode her ability to execute at those spreads: reaching a unique spread means holding both legs off the market at once, which is no longer in play upon getting legged. OneChronos executes the pair as a single trade, so execution serves the strategy rather than eroding it, and pairs traders may harvest more unique liquidity with reduced execution uncertainty.
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May 2026
Pairs Without Legging Risk: Leg 1
In this first "leg" of a two-part series, we show how pairs trading can break down due to timing gaps between legs, introducing unintended transaction costs and risk. OneChronos, built on a design philosophy of coordinated and intentional execution, enables atomic multi-security trades that eliminate legging risk at its source.
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February 2026
Periodic Auctions - Unique Liquidity, Unique Execution
Across all equity securities—and highlighted here in S&P 500 constituents—OneChronos takes speed out of the trading equation, delivering unique institutional liquidity and more stable execution at scale.
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Products
Nexus
Nexus is our custom counterparty offering (sometimes known in the market as "private rooms"), accessed through your routing broker. It addresses growing user demand for bilateral liquidity, one-to-many trading, and outsourced matching engine technology. Our approach is lightweight and flexible, with numerous customizable configurations leveraging our best-in-class matching algorithm. Nexus executions have real-time transparency to participants.
Learn more →Conditionals
Conditional orders have helped traders source block liquidity and reduce the opportunity cost often associated with fragmentation. We've delivered a product that works well for these use cases while creating additional optionality and unique liquidity on the OneChronos platform.
Learn more →Pairs
Expressive Bidding (EB) is one of the defining features of a Smart Market, providing the ability to express highly customizable execution preferences over one or more securities. Pairs EB, our first live EB product, provides a very intuitive use case for trading two assets atomically and is designed to complement broker pairs algorithms. Pairs EB eliminates the legging risk associated with trading merger arb deals, dual-class shares, beta / delta hedging, and relative value trading.
Single Stock EB
Single Stock EB gives participants the ability to express customizable execution preferences over one or more securities.
The Outcome
Submit larger and more flexible orders with embedded safeguards in the venue matching engine
Protect against market dislocations without burdening the parent order or algo
Achieve better prices by expressing preferences that respond to real-time market conditions