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

From Silos to Sequencers: Why Core Trading Architectures Are Being Rewritten for 24/7 Markets

The most consequential changes facing financial markets technology in 2026 will not be driven by new asset classes or incremental latency gains, but by a fundamental rethinking of how trading systems are architected at their core. For decades, market participants have organised technology around functional silos: execution, risk, middle office, post-trade. These boundaries were reinforced...

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

Valuations – Toward On-Demand Evaluated Pricing

Risk and regulatory imperatives are demanding access to the latest portfolio information, placing new pressures on the pricing and valuation function. And the front office increasingly wants up-to-date valuations of hard-to-price securities. These developments are driving a push toward on-demand evaluated pricing capabilities, with pricing teams seeking to provide access to valuations at higher frequency...