About us

Cumulus9 is reshaping the landscape of risk management for exchange-traded derivatives. We leverage the power of cloud technology to unlock new dimensions in margin forecasting and risk analytics. Our intuitive platform presents a best-in-class approach, enabling financial market participants to better anticipate the potential changes in margin requirements during periods of stress.


Our services are directed at derivatives professionals who want to take away the burden of managing data and complex margin methodologies to operate more effectively.


Our mission is to increase transparency of derivatives margin models and improve the ability to assess market risk to make market participants better prepared for stress events and reduce systemic risk across the financial industry.


Our vision is to be the best in class globally for risk analytics on exchange-traded derivatives and to create innovative software that simplifies and improves processes for assessing market risk.

Meet the Team

  • Giuseppe Fiocco

    Founder & Managing Director

    Giuseppe is the founder of Cumulus9 and acting as Managing Director and lead architect at Cumulus9.

    Giuseppe has partnered with Kaizen Reporting to establish Cumulus9 as the gold standard of risk management on exchange-traded-derivatives. Before founding Cumulus9, Giuseppe worked as Head of Market Risk and Chaired the Management Risk Committee at G.H. Financials. Giuseppe began his career as a market risk analyst at ICE Clear Europe. Giuseppe holds a BSc in Mathematics and an MSc in Risk and Stochastics. Giuseppe is passionate about coding and developing innovative cloud-native applications.

  • Rafik Mrabet

    Managing Director

    Rafik is a senior risk professional in financial services, acting as Managing Director, leading business development at Cumulus9.

    Rafik specialises in derivatives trading and risk management, risk methodology and has practical experience in designing and developing risk models. He has led the design and development of the innovative margin risk system, ICE Risk Model 2 (IRM 2), at Intercontinental Exchange Inc (ICE), and has been listed at an Inventor in the IRM 2 patent. His prior roles include Head of Risk at ICE Clear Europe, one of the world’s most diverse and leading clearing houses, Structured Credit Trader and Risk Manager at Mizuho.

  • Geno Luchmun

    General Counsel

    Geno attended law school at the College of Law in York and has a degree in Business Studies.

    Geno worked at LIFFE for 14 years becoming Head of Legal and Company Secretary.  At NYSE Euronext, Geno headed up the legal team in the successful tender to become the administrator for LIBOR following a recommendation to HM Treasury. Geno was heavily involved in the acquisition of NYSE Euronext by ICE. Geno also worked at ICAP as General Counsel and MD Regulation of its recognised investment exchange before joining Kaizen Reporting.

  • Justin Multani

    Head of Analytics

    Justin is an experienced quantitative risk professional, currently heading Data and Analytics at Cumulus9.

    A passionate risk professional with a mathematical background, Justin steers the development of the backend analytics engine at Cumulus9, enriching the data through innovative models. Prior to joining Cumulus9, he honed his skills in model risk management in the second line at London Metal Exchange (LME) and market risk in the first line. Justin holds a BSc in Mathematics and an MSc in Applied Mathematics, which serve as the bedrock of his knowledge.