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

Upcoming Webinar: From 24/7 to Event-Driven: Engineering the Next-Generation Exchange Platform

Date: 28 April 2026 Time: 10:00am ET / 3:00pm London / 4:00pm CET Duration: 50 minutes What digital asset and prediction markets are teaching traditional exchanges about availability, agility and time-to-market. New market structures and regulatory changes are forcing exchange operators to rethink the foundations of their technology stacks. Digital asset exchanges, prediction markets and...

BLOG

When Margin Moves Upstream: How TT is Reworking Trading Decisions After the OpenGamma Deal

More than a month after completing its acquisition of OpenGamma, Trading Technologies is beginning to articulate how the deal is intended to change the way firms think about margin, capital efficiency, and trading decision-making. Rather than positioning margin as a downstream risk or treasury concern, TT is now framing capital efficiency as a front-office variable...

EVENT

TEST Event page 2

Now in its 15th year the TradingTech Summit London brings together the European trading technology capital markets industry and 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

MiFID II Handbook – Second Edition

With the compliance deadline for Markets in Financial Instruments Directive II (MiFID II) just over two months away, A-Team Group has updated its MiFID II handbook to bring you the latest details on the regulation’s compliance requirements. Version 2 of the handbook, commissioned by Thomson Reuters, also includes new sections covering data sourcing and data...