About a-team Marketing Services
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

Recorded Webinar: Executing the Migration to Cloud to Enable Scalability and Innovation

Cloud-based services and processing have become essential to financial institutions as their data management demands have become more complex and expansive. Thousands of organisations have made the jump from their limited on-premises tech stacks to the near-infinite scalability opportunities of public and private clouds. They have also been motivated by the need to modernise their...

BLOG

3forge Seeks to Simplify the Complexity of Modern Data Management Demands

The high level of data and data product use-case customisation among financial institutions offers an insight into the challenges that technology teams face in managing their organisations’ data. Observability has become more difficult as each data user tailors their tech provisions to their own business needs and data provisioning must be similarly responsive at a...

EVENT

TradingTech Summit London

Now in its 16th year, the TradingTech Summit London brings together senior leadership across capital markets trading technology and market data. Join us to deep dive into key opportunities and challenges driving technological transformation across sell-side and buy-side firms.

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...