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Bids Trading L.P.

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BIDS Trading L.P. is a U.S. broker-dealer and operator of the BIDS Alternative Trading System (ATS), a leading block trading venue for large equities orders, now part of Cboe Global Markets.

Last updated September 28, 2026

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Overview

BIDS Trading L.P. is a registered U.S. broker-dealer and the operator of the BIDS Alternative Trading System (ATS), an off-exchange venue that allows buy-side and sell-side market participants to anonymously trade large blocks of equities. The platform is designed to foster competition and resolve inefficiencies in block trading, offering a highly liquid, low-cost, broker-sponsored service. Its open access model encourages participation from a broad and diverse pool of market participants, helping users source real liquidity while maintaining anonymity and minimizing the dissemination of trade information. The BIDS ATS is accessed through BIDS Trader, a web-based front-end interface that integrates with a trader's Order Management System or Execution Management System, providing one-click direct access to the venue. According to the company, BIDS Trader is used by over 520 asset managers and 100 brokers globally. BIDS Trading describes itself as the largest independent block trading platform in the U.S. and Europe by trading volume. BIDS Trading is part of Cboe Global Markets, a major exchange operator that provides trading, clearing, and investment solutions across options, futures, cash equities, and foreign exchange in North America, Europe, and Asia Pacific. Under Cboe ownership, the BIDS brand has been extended internationally, with Cboe BIDS Europe and Cboe BIDS Canada bringing the block trading model to additional regions. The service remains focused on institutional block trading, combining global reach, anonymity and security, and open access to serve asset managers and brokers. As a broker-dealer and ATS operator, BIDS Trading operates in a highly regulated segment of financial markets. Its value proposition centers on enabling institutional investors to execute large orders efficiently without significantly affecting market price, a persistent challenge in equity markets. The platform's global distribution network and integration with order management systems make it a key piece of market infrastructure for block liquidity.

History

BIDS Trading L.P. was established as a broker-dealer and operator of the BIDS Alternative Trading System (ATS), an off-exchange venue for anonymous block trading in equities. The platform was built to address the difficulty institutional investors face in executing large orders without moving market prices, and it introduced an open access model that allows a broad set of buy-side and sell-side participants to interact. Its front-end, BIDS Trader, became a widely used interface for block traders, integrating with order and execution management systems. Over time, BIDS expanded beyond the United States. Cboe BIDS Europe and Cboe BIDS Canada were launched to bring the block trading model to additional regions, and the service now operates across the U.S., Europe, and Canada. The company states that BIDS Trading is the largest independent block trading platform in the U.S. and Europe by trading volume, and that BIDS Trader is used by over 520 asset managers and 100 brokers globally. BIDS Trading is now part of Cboe Global Markets, a major exchange operator whose offerings span options, futures, cash equities, and foreign exchange across North America, Europe, and Asia Pacific. Under Cboe, the BIDS brand continues to serve institutional block trading needs, leveraging Cboe's global market infrastructure and distribution.

  • BIDS Trading operates the BIDS Alternative Trading System (ATS) for anonymous block equities trading.

  • BIDS Trader front-end interface is used by over 520 asset managers and 100 brokers globally.

  • Cboe BIDS Europe and Cboe BIDS Canada extend the block trading model internationally.

  • BIDS Trading becomes part of Cboe Global Markets.

Products and positioning

A highly liquid, low-cost, broker-sponsored block trading platform designed to foster competition and resolve inefficiencies in block trading, with an open access model and global reach.

  • BIDS ATS

    An alternative trading system providing an off-exchange venue for anonymous block equities trading.

  • BIDS Trader

    A web-based front-end interface for buy-side traders, integrating with OMS/EMS for one-click access to the BIDS ATS.

  • Cboe BIDS Europe

    European block trading venue based on the BIDS model.

  • Cboe BIDS Canada

    Canadian block trading venue based on the BIDS model.

Recent events

  • Reported

    Cboe appoints Bryan Harkins as BIDS Trading president[6]

    Cboe Global Markets announced that Bryan Harkins had been appointed president of BIDS Trading, effective immediately, succeeding Tim Mahoney.

  • Reported

    Cboe announces Tim Mahoney's planned retirement from BIDS Trading[6]

    Cboe Global Markets announced Tim Mahoney's planned retirement from the company; the source does not specify a retirement date.

  • Reported

    Cboe completed its acquisition of BIDS Trading[7]

    Cboe Global Markets announced that it had completed its acquisition of BIDS Trading, which operates the BIDS Alternative Trading System. Cboe said BIDS ATS would remain an independently managed and operated venue separate from its U.S. securities exchanges.

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