THETA Trading Systems ("THETA") is revolutionising trading in capital markets. Based in London, THETA provides the next-generation trading platform or EMS ( Execution Management System) for institutional investment managers through its innovative, cloud-native SaaS platform, Apollo. Built by industry experts, Apollo is a marketplace and data aggregator that transforms trading for the digital age, empowering traders with a modern, seamless web-native digital user experience and a flexible, responsive, and intuitive way to trade smarter, from anywhere.

With a specialist focus on fixed income markets, in response to demand, THETA draws upon the successes and lessons learned from the electrification and efficiency of capital markets trading in foreign exchange, cash equities, and listed derivatives. THETA accelerates trading digital transformation, leveraging unparalleled capital markets expertise to turbocharge liquidity, streamline standardisation, and deploy cutting-edge technology infrastructure – delivering a game-changing and optimised trading experience for clients institutional invesment managers seeking a competitive advantage with a digital user experience, trading efficiency, agility, and future growth.


Abdullah Hiyatt


Business technology executive leader with a track record of driving strategic change in complex and challenging initiatives. Abdullah has 25 years’ experience in capital markets trading technology and digital transformation, and a background in strategy and management consulting. He has worked with leading investment banks, asset and wealth managers, exchanges and B2B FinTechs on a global scale.
THETA Trading Systems

Paul Wallace

Head of Product

25 years experience in Fixed Income and Foreign Exchange Trading. Prior to joining THETA, Paul was Head of Fixed Income Trading at Aviva Investors.

Before that, Paul held senior trading roles for Hermes, BGC Partners and Barclays Global Investors amongst others covering Fixed Income and FX cash and derivatives traded products.

THETA Trading Systems

Peter Meddemann

Strategic Advisor

30 years’ experience in capital markets technology delivering and managing trading solutions operating as CTO and technology leadership roles at Bloomberg, Thomson Financial. GL Trade, City Index and most recent Kore Labs.
THETA Trading Systems

George O'krepkie

Strategic Advisor

20 years funded, helped build and sold successful FinTech platforms in the market today. Most recently, George was Chairman and CEO of AX Trading Group. He sold to the London Stock Exchange, and Trading Edge to MarketAxess. Prior to that he held senior trading roles at Lehman Brothers, and Merrill Lynch.
THETA Trading Systems