- Blackbird
 - Makers of trading software. - Consort Securities Systems
- Supplies software for private client stockbrokers, investment managers, and other participants in the securities industry.
- Exchange Data International
- Provides financial software and securities data to brokerages, custodians and fund managers in the investment banking industry.
- Information & Trading Systems, Ltd.
- Provide software and web solutions for the financial investment industry.
- LatentZero
- Specialising in front and middle office solutions for investment management companies.
- LSS Support Services Ltd
- Suppliers of software to the financial services sector, specialising in data mining of legacy databases.
- Market Data Services Limited
- Provides trading room cost management software tools.
- MBA Systems Ltd
- Specialising in developing dealing room systems, data feed handlers, Internet and intranet solutions for financial institutions.
- MetaStock UK and Ireland
- Source for individual British and Irish investors looking to learn more about investing, technical analysis, and charting software.
- Percival Software Ltd
- Software systems for share registration, clearing & settlement and central depository. Worldwide customer base.
- QUANTEC Online
- Providing quantitative construction and analysis tools to investment professionals throughout the world.
- Rolfe and Nolan
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