BIDS Trading L.P. is a registered broker-dealer and operator of the BIDS Alternative Trading System (ATS) which was designed to bring counterparties together to anonymously trade large blocks. Developed by a consortium of leading financial services firms, the BIDS ATS resolves the classic paradox of the block trader: the need to find legitimate trading counterparties without prematurely revealing trading intentions. The BIDS sponsorship model offers a low-cost alternative and an excellent commission management tool for the buy-side, providing them the opportunity to find unique liquidity, while paying their sponsoring brokers for research and other services. BIDS has grown to be a dominant player for block volume in the U.S.

In 2016, BIDS partnered with Cboe Europe to launch Cboe LIS. Designed to deliver BIDS innovative trading model into the European markets under the Bats Europe RIE (Registered Investment Exchange) umbrella, Cboe LIS is a rapidly growing presence in the EU block market.