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

A-Team Insight Briefs

Jonathan Kellner Named CEO of MEMX

Subscribe to our newsletter

Jonathan Kellner has joined Members Exchange (MEMX), a recently established member-owned equities exchange. Founding members include Bank of America Merrill Lynch, Charles Schwab, Citadel Securities, E*Trade, Fidelity Investments, Morgan Stanley, TD Ameritrade, UBS, and Virtu Financial. Before signing on to MEMX, Kellner led Instinet through the acquisition of BlockCross ATS from State Street, and the transition through regulatory change, including Dodd-Frank and MiFID II.

Subscribe to our newsletter

Related content

WEBINAR

Recorded Webinar: The Buy-side Trading Desk of the Future

The buy-side trading desk is facing a structural reckoning. Decades of siloed systems for equities, FX and fixed income have created what COOs increasingly describe as a “silo tax” – duplicated headcount, fragmented data, and operational overhead that is harder to justify now that the underlying workflows have, in functional terms, converged. Thirty years of...

BLOG

Rothera Leverages Adaptive Exchange Accelerator to Build Regulated Event Contract Venue

Rothera, the CFTC-regulated event contracts exchange and clearinghouse founded as a joint venture between Robinhood and Susquehanna International Group, has launched its trading and clearing platform on Adaptive’s Aeron Exchange Accelerator technology, going live in under five months, in time for the 2026 World Cup. The platform reports $3 billion contracts traded during its first...

EVENT

Buy AND Build: The Future of Capital Markets Technology

Buy AND Build: The Future of Capital Markets Technology London examines the latest changes and innovations in trading technology and explores how technology is being deployed to create an edge in sell side and buy side capital markets financial institutions.

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...