Turquoise
Product brand
UnclaimedTurquoise is a London-based multilateral trading facility and equities trading platform operated within the London Stock Exchange Group.
Last updated October 14, 2026
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Overview
Turquoise is an electronic trading venue for equities and related products, established in 2008 by a consortium of nine major investment banks. It was created to challenge the pricing and market structure of traditional exchanges by offering a pan-European venue with lower dealing costs, initially promoted as operating at roughly half the cost of established exchange services. The platform was designed as a hybrid venue, supporting both transparent lit-market trading and mechanisms for handling transactions away from traditional exchanges. The founding consortium consisted of BNP Paribas, Citi, Credit Suisse, Deutsche Bank, Goldman Sachs, Merrill Lynch, Morgan Stanley, Société Générale and UBS. The group selected EuroCCP for clearing and settlement and Sweden's Cinnober for the core trading technology. Turquoise also developed real-time market-surveillance capabilities intended to identify possible breaches of trading rules and unusual market activity. Its surveillance environment used Software AG's Apama complex-event-processing technology, while QuantHouse supplied a low-latency market-data feed. Turquoise successfully began operations in August 2008. Its early development reflected the growth of alternative trading venues in Europe, where banks and institutional investors were seeking competition to incumbent exchanges, lower transaction costs and more flexible execution options. By late 2009 the platform reportedly held approximately 7% of the relevant market. In December of that year, the London Stock Exchange Group agreed to acquire a 60% stake. Turquoise was subsequently combined with the LSE Group's Baikal Global trading facility, bringing the platform into the LSE's broader market-infrastructure structure. A major technology transition occurred in October 2010, when Turquoise migrated to the MillenniumIT platform, a system associated with the London Stock Exchange Group. The migration was followed by a delayed opening caused by technical problems discovered overnight. A further outage occurred in November 2010, and the LSE said that preliminary investigations indicated that human error might have occurred in suspicious circumstances. These incidents highlighted the operational and control risks associated with high-speed electronic markets, although they did not end Turquoise's expansion. The platform broadened its scope beyond cash equities through the launch of an Electronic Sola derivatives platform in June 2011. It initially supported FTSE 100 futures and later added FTSE 100 options. Turquoise received the Financial News Awards for Excellence in Trading and Technology Europe award for Best New Derivatives Trading Platform or Service in 2011. The Turquoise derivatives business was acquired by London Stock Exchange plc in September 2013. Turquoise continued to develop services for large institutional orders and alternative execution strategies. In October 2014 it introduced a block-discovery service designed to help participants identify counterparties and match indications of interest in large transactions. The service was later recognized as Most Innovative Trading Service at the 2015 Trading & Technology Awards. In 2016, Turquoise announced plans to extend its dark-pool offering to the Czech Republic, Poland and Hungary. Following the United Kingdom's withdrawal from the European Union, Turquoise reported strong trading volumes in early 2021. Later that year it said that equities trading conducted since its partnership with Plato had exceeded €1 trillion. Turquoise also expanded access to U.S. shares during United Kingdom market hours and connected to OpenFin to deliver its data feed to FlexTrade. In 2022 it partnered with M-DAQ to support cross-currency securities trading and settlement in a participant's preferred currency. That year it also announced the return of trading tariffs for parts of its lit-markets business; the fees had been removed in 2018 after market participants argued that they could undermine best execution. Turquoise remains an electronic venue focused on competition, execution choice, market connectivity and institutional trading across European and international securities markets.
History
Turquoise was established in 2008 by nine large investment banks seeking to create a competing electronic venue for European equities. Its commercial proposition centered on lower dealing costs, pan-European access and the ability to combine transparent exchange-style execution with trading mechanisms outside traditional exchanges. The founding banks selected EuroCCP for clearing and settlement and Cinnober for the trading system. Turquoise also implemented automated market-surveillance capabilities and used QuantHouse for low-latency market data. The venue launched successfully in August 2008. It became part of the consolidation of European alternative trading venues as banks and institutional investors looked for additional sources of liquidity and lower execution costs. In December 2009, the London Stock Exchange Group agreed to acquire a 60% stake in Turquoise. The platform was subsequently merged with Baikal Global, an LSE Group trading facility, integrating Turquoise into the group's wider exchange and market-infrastructure operations. In October 2010, Turquoise migrated to the MillenniumIT trading platform. Its opening was delayed after overnight technical problems, and the system experienced a further two-hour outage in November. The London Stock Exchange described preliminary findings as indicating that human error may have occurred in suspicious circumstances. Despite these operational difficulties, Turquoise continued to develop its technology and product range. The platform entered derivatives in June 2011 through its Electronic Sola system. FTSE 100 futures were introduced first, followed by FTSE 100 options in September. The derivatives operation received a Financial News award in 2011 and was acquired by London Stock Exchange plc in September 2013. Turquoise later focused on institutional execution services, launching block discovery in 2014 and planning dark-pool access in additional Central European markets in 2016. After Brexit, Turquoise reported increased activity during early 2021. It also announced that equities trading conducted since its Plato partnership had surpassed €1 trillion. The same period saw efforts to expand access to U.S. shares during U.K. hours and to improve interoperability with financial-technology applications through OpenFin and FlexTrade. In 2022, a partnership with M-DAQ addressed cross-currency trading and settlement. Turquoise also reinstated trading tariffs for its lit markets, reversing a zero-tariff policy introduced in 2018. The platform remains an LSEG-associated electronic trading venue serving institutional participants in equities and related markets.
- 2022
Cross-currency services and tariff changes
[1]A partnership with M-DAQ supports cross-currency trading and settlement, while Turquoise announces the return of lit-market tariffs.
- 2021
Post-Brexit expansion and €1 trillion trading milestone
[1]Turquoise reports stronger volumes after Brexit and says equities traded since its Plato partnership have exceeded €1 trillion.
- 2014
Block-discovery service launches
[1]Turquoise introduces a service intended to help participants locate and match large-order liquidity.
- 2013
Turquoise derivatives business is acquired by LSE plc
[1]The derivatives operation becomes part of London Stock Exchange plc.
- 2011
Derivatives platform launches
[1]Electronic Sola launches with FTSE 100 futures and later adds FTSE 100 options.
- 2010
Migration to MillenniumIT
[1]Turquoise moves to the MillenniumIT trading platform, followed by reported opening delays and an outage.
- 2009
LSEG acquires a majority stake
[1]The London Stock Exchange Group agrees to acquire 60% of Turquoise and later combines it with Baikal Global.
- 2008
Turquoise is established and launches
[1]A consortium of nine investment banks creates Turquoise, which begins operating in August as a pan-European electronic equities venue.
Products and positioning
A technology-led alternative trading venue emphasizing pan-European access, competitive pricing, execution choice, institutional liquidity and electronic market infrastructure.
Electronic equities trading venue · 2008
Turquoise Equities
Turquoise's core service is an electronic multilateral trading facility for equities. It was designed to provide institutional market participants with an alternative source of liquidity to traditional exchanges, combining transparent lit trading with mechanisms for handling orders away from conventional exchange order books. The venue's proposition emphasizes pan-European connectivity, automated execution and competitive transaction economics.
Off-exchange institutional execution
Turquoise Dark Pool
The dark-pool offering is intended for participants seeking to execute larger orders with reduced pre-trade transparency. Turquoise announced plans in 2016 to extend access to markets including the Czech Republic, Poland and Hungary. The service forms part of the platform's broader effort to provide execution choice alongside its lit market.
Block-trading service · 2014
Turquoise Plato Block Discovery
Launched in 2014, the block-discovery service helps participants communicate indications of interest and identify potential matches for large orders. It is aimed at institutional trading situations in which counterparties need to locate meaningful liquidity without exposing the full order to the public market. Turquoise later linked the service to a reported cumulative equities-trading milestone.
Equity derivatives platform · 2011
Electronic Sola
Electronic Sola was introduced in 2011 to extend Turquoise into listed equity derivatives. The platform began with FTSE 100 futures and expanded to FTSE 100 options later that year. The derivatives business was subsequently acquired by London Stock Exchange plc in 2013.
Trading technology and data services
Market data and connectivity
Turquoise supports electronic participants through low-latency market-data and connectivity arrangements. QuantHouse was selected as a low-latency market-data provider, while later integration with OpenFin enabled delivery of the venue's data feed to FlexTrade.
Brand decisions
2022
Reintroduce trading tariffsPrice changeBackground
Turquoise had removed trading tariffs in 2018 after participants argued that the pricing model could adversely affect best execution. The venue later sought to support its lit-markets business through a revised charging approach.
Action taken
Turquoise announced the reintroduction of trading tariffs.
Aftermath
The change marked a reversal of the zero-tariff policy, although the available reference material does not specify the resulting financial or market-share impact.
2014
Launch block discoveryProduct launchBackground
Institutional investors needed ways to locate liquidity for large orders while limiting the market impact associated with fully displaying those orders.
Action taken
Turquoise introduced a block-discovery service that matched indications of interest for large transactions.
Aftermath
The service later won the Most Innovative Trading Service award at the 2015 Trading & Technology Awards.
2011
Enter equity derivativesProduct launchBackground
Turquoise sought to broaden its venue beyond cash equities and offer participants additional listed trading instruments.
Action taken
It launched Electronic Sola with FTSE 100 futures and later added FTSE 100 options.
Aftermath
The derivatives offering received industry recognition, and the derivatives business was acquired by London Stock Exchange plc in 2013.
2010
Migrate the trading platform to MillenniumITStrategyBackground
Turquoise needed a scalable trading system within its new LSEG-associated structure and moved away from its earlier technology arrangement.
Action taken
The venue migrated to the MillenniumIT platform in October 2010.
Aftermath
The migration was followed by an opening delay caused by technical problems and a further outage in November, underscoring the operational risks of platform changes.
2009
Accept LSEG majority investment and combine with Baikal GlobalM&ABackground
Turquoise was created as a bank-backed challenger venue and had developed meaningful market share, but integration with a major exchange group offered additional infrastructure, distribution and market reach.
Action taken
The London Stock Exchange Group agreed to take a 60% stake, after which Turquoise was merged with the LSE Group's Baikal Global facility.
Aftermath
Turquoise became part of the LSEG market-infrastructure portfolio while retaining its distinct trading-platform identity.
LSEG ownership stake. 60% (December 2009)
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