About a-team Marketing Services
The knowledge platform for the financial technology industry
The knowledge platform for the financial technology industry

A-Team Insight Blogs

Marion Leslie Leaves Refinitiv to Head Up SIX Financial Information

Subscribe to our newsletter

Marion Leslie has stepped down from the role of managing director of Refinitiv’s Enterprise business and will join SIX as leader of SIX Financial Information and a member of the SIX executive board on January 1, 2020. She will succeed Robert Jeanbart, who has decided to retire at the end of this year.

Jeanbart joined the executive board of SIX in May 2014, taking responsibility for the financial information business unit and successfully restructuring by streamlining its Swiss and international operations and developing new business areas. Expansion was focused on regulatory data and services, along with strengthening the company’s reference data and corporate actions business.

Leslie began her career at Refinitiv (formerly Thomson Reuters) in 1994. After holding various management roles within the company, she became managing director in 2013 with responsibility for the data business in the areas of regulation, pricing and reference data.

In her last role at Refinitiv, she was managing director, Enterprise, with responsibility for delivering market data, platforms and services to the global financial markets. Leslie will move from the UK to Switzerland to take up her role at SIX.

Jos Dijsselhof, CEO at SIX, comments: “Marion knows the financial information business very well and with her at the helm we will drive our financial data business to the next level.”

Subscribe to our newsletter

Related content

WEBINAR

Upcoming Webinar: The ROI of Data Trust: Quantifying the Business Value of Data Observability

Date: 8 July 2026 Time: 10:00am ET / 3:00pm London / 4:00pm CET Duration: 50 minutes Data is the fuel that keeps modern financial institutions’ motors running but if that data can’t be trusted then the decisions made based upon it, or the uses to which its put, will be compromised. That’s especially important for...

BLOG

Risks and Opportunities of GenAI, Data Products Under the Microscope: DMS London Preview

Artificial intelligence has made it possible to extract critical data from unstructured sources at speed and at scale. But the headlong rush to adopt the sorts of tools that can mine this rich vein of information is exposing organisations to new risks. Generative AI, whose models are commonly applied to trawling PDFs, emails, financial reports...

EVENT

Eagle Alpha Alternative Data Conference, London, hosted by A-Team Group

Now in its 8th year, the Eagle Alpha Alternative Data Conference managed by A-Team Group, is the premier content forum and networking event for investment firms and hedge funds.

GUIDE

AI in Capital Markets Handbook 2026

AI adoption in capital markets has moved into a more disciplined phase. The priority is now controlled deployment: where AI can be used safely, where it can deliver measurable value, and how outputs can be governed, monitored and evidenced. The 2026 edition of the AI in Capital Markets Handbook examines how AI is being applied...