Meristem Stockbrokers Limited has announced the appointment of Mr. Oscar Nduka Onyema as Chairman, subject to regulatory approval by NGX Regulation Limited, according to a market bulletin dated April 17, 2026, and seen by Nairametrics.
The disclosure was made by NGX Regulation Limited in a notification signed by Chinedu Akamaka, Head, Market Regulation, confirming that the dealing member has formally notified the Exchange of the board change.
The development signals a strategic leadership move for the firm as it brings on board a seasoned capital markets executive with deep experience across Nigeria’s financial ecosystem.
What they are saying:
NGX Regulation Limited confirmed that the appointment remains subject to regulatory clearance, following due process for leadership changes within capital market institutions.
- “The above-named Trading License Holder (Meristem Stockbrokers Limited) has notified NGX Regulation Limited of the appointment of a new director and is seeking approval for the appointment of Mr. Oscar Nduka Onyema as Chairman,” the NGX stated.
Mr. Onyema’s appointment as Chairman of Meristem Stockbrokers will only take effect upon approval by the regulator, in line with established governance procedures.
Brief Profile
Mr. Onyema holds a Bachelor of Science degree in Computer Engineering from Obafemi Awolowo University, Ile-Ife.
- He also holds a Master of Business Administration in Finance and Investments from the Ziklin School of Business at Baruch College, City University of New York, United States.
- He is widely recognized for his leadership within Nigeria’s capital markets and currently serves as Chairman of JEX Markets Limited.
- His prior roles include serving as Group Managing Director and Chief Executive Officer of Nigerian Exchange Group Plc, as well as Chief Executive Officer of Nigerian Stock Exchange.
- Mr. Onyema played a pivotal role in modernizing Nigeria’s stock market, a milestone that reshaped the governance and operational structure of the institution.
His appointment is expected to strengthen governance and strategic direction at Meristem Stockbrokers, given his deep expertise in market regulation, trading systems, and institutional leadership.
Get up to speed
Oscar Onyema presided over one of the most transformative periods in Nigeria’s capital market, spanning 13 years from 2011 to 2024 across the Nigerian Stock Exchange and later Nigerian Exchange Group.
- He assumed office in 2011 during a period marked by post-2008 market downturn, weak investor confidence, and limited product depth.
- He led sweeping reforms that repositioned the Exchange into a modern, technology-driven and globally aligned marketplace.
- He oversaw the demutualisation of the Nigerian Stock Exchange in 2021, transforming it into Nigerian Exchange Group Plc with a new governance and operational structure.
- He also strengthened market infrastructure, upgraded trading systems, and ensured business continuity during COVID-19 disruptions.
These efforts collectively restored credibility, improved transparency, and enhanced investor confidence in Nigeria’s capital market.
What you should know
The approval process for Onyema’s appointment is part of standard regulatory procedures designed to ensure that individuals appointed to key roles meet fit-and-proper requirements.
- NGX Regulation Limited has invited objections or comments regarding the appointment within seven days of the publication date.
- The review process ensures compliance with governance and regulatory standards within the capital market.
- Meristem Stockbrokers Limited operates as a licensed dealing member of the Nigerian Exchange, offering brokerage and investment services to institutional and retail clients.
The appointment comes at a time when firms in Nigeria’s capital market are strengthening leadership structures to navigate evolving regulations and increased market participation, positioning Meristem Stockbrokers for its next phase of growth.
