CrestCo Ltd, now operating as Euroclear UK & International (EUI), is the central securities depository (CSD) for the United Kingdom and Ireland, responsible for the electronic settlement of securities transactions.
Founded in the mid-1990s, CrestCo revolutionized London’s financial markets by moving them from paper-based share certificates to a “dematerialised” (electronic) system, thereby significantly reducing settlement times, risks, and costs.

Detailed Overview: CREST and CrestCo
- Purpose: The CREST system (Certificateless Registry for Electronic Share Transfer) enables electronic, real-time settlement of securities.
- Services: It handles settlement of UK and Irish equities, gilts (government bonds), and various other corporate securities.
- Key Functions:
- Dematerialisation: Eliminating the need for physical share certificates.
- Real-time Settlement: Reducing operational and credit risk.
- Corporate Actions: Managing dividend payments and other corporate events.
- CDIs: Utilizing CREST Depositary Interests (CDIs) to facilitate trading of international securities.
- Transformation: In 2002, CrestCo was acquired by Euroclear and later renamed Euroclear UK & Ireland Ltd (EUI).
Comprehensive Timeline by Year
- 1993: The Bank of England initiates the CREST project to replace the aborted TAURUS system (Transfer and Automated Registration of Uncertified Stock), aiming to digitize London’s settlement.
- 1996: CrestCo Ltd is officially founded and the CREST system goes live, beginning the shift from paper-based settlements to electronic transfers.
- 1997-1998: Rapid adoption of the system by market participants, facilitating faster settlement cycles.
- 1999: Introduction of automated “settlement discipline” regimes, including league tables and fines to incentivize performance.
- 2002: Euroclear merges with CrestCo. CrestCo is integrated into the Euroclear group, marking its transformation into a larger, internationally integrated entity.
- 2007 (July 1): CRESTCo Ltd officially changes its name to Euroclear UK & Ireland Ltd (EUI).
- 2010 (September 1): EUI merges with EMX Company Limited, enhancing its ability to handle investment funds and expanding its network.
- 2016: CISI reports that CREST has successfully provided 20 years of secure, efficient settlement, solidifying its role in UK financial infrastructure.
- 2020s: Continued enhancement of the system, including improved digital security and adaptation to evolving European Union and UK regulatory standards.
- 2024: Continued operation as a premier infrastructure provider under Euroclear.
- 2026 (April): Euroclear UK & International Ltd continues to operate as the leading CSD in London, with ongoing focus on digital asset security and efficient settlement.
Key Impacts on London Financial Markets
- Risk Reduction: Shifted settlement risk from days to near real-time.
- Efficiency: Drastically reduced manual processing (“mundane practices”) and associated costs.
- Integration: Facilitated the integration of UK markets into the broader European infrastructure.
CrestCo Ltd, now operating as Euroclear UK & International (EUI)