November 13, 2025
Osmosis appoints new Chief Investment Officer, expands investment team, and names Global Head of Strategy and Client Solutions
While many asset managers are scaling back their climate commitments and sustainable investment capabilities, systematic specialist Osmosis Investment Management is stepping forward. The firm today announced the future and current appointments of five senior hires from Legal & General including Dr. Fadi Zaher, L&G’s former Head of Index Solutions, who will take up the role of Chief Investment Officer on 2 April 2026 and Colm O’Brien who joined Osmosis in September as Global Head of Strategy and Client Solutions.
Dr. Zaher will bring extensive experience in developing proprietary investment signals and systematic portfolio design and will spearhead the firm’s next phase of quantitative research and product innovation. At L&G, Dr. Zaher was responsible for the design, creation, and maintenance of proprietary strategies totalling approximately £100 billion.
Dr. Zaher will be joined by former L&G colleagues Silvio Corgiat Mecio, recently appointed Osmosis’s Head of Systematic Solutions, Jason Lee who joins on 19 November as a Quantitative Developer & Researcher and Fanggang (Royce) Yan as a Senior Quantitative Analyst. The team bring deep expertise in sustainability, factor investing, and quantitative research, further enhancing Osmosis’s factor-based research and modelling capabilities.
Former L&G executive, Colm O’Brien (former Head of LGIM Index for EMEA), will partner closely with Dr. Zaher and the investment team to connect Osmosis’s systematic research with the evolving needs of institutional clients globally.
Ben Dear, Chief Executive Officer of Osmosis Investment Management, said:
“While the current climate for sustainable investing remains politically and commercially challenging, we believe this moment presents a unique opportunity to build out our capabilities and ensure investors can navigate the complex challenges that lie ahead. These appointments are key to that commitment. The new team’s deep expertise in systematic and factor-based sustainable investment perfectly complements our strategy and supports our mission to deliver innovative, climate-aligned solutions for our clients.”
Colm O’Brien, Global Head of Strategy and Client Solutions at Osmosis, said:
“I’m delighted to join Osmosis — a firm I’ve long admired for its innovation, focus, and genuine commitment to sustainable investing. As we expand globally, I look forward to building on this legacy and helping shape the next generation of investment solutions for our clients. With our new hires and Osmosis’s existing expertise, we have an exceptional opportunity to redefine what responsible investing can achieve.”
Earlier this year, the USD17 billion sustainable investment firm launched its climate-transition credit platform in the Netherlands, led by Victor Verberk, broadening its cross-asset capabilities. With more than fifty professionals across its equities and credit businesses, Osmosis continues to grow as one of the world’s leading environmental investment specialists.
About Osmosis Investment Management
Osmosis’ mission since 2009 has been to become the world’s leading dedicated environmental asset manager, delivering sustainability-focused investment solutions across multiple asset classes. Building on our strong foundation in systematic equity, we have expanded our expertise to include fixed income and credit through our team in the Netherlands, strengthening our ability to support clients in every market environment.
Through proprietary research, advanced analytics, and deep environmental insight, we help investors align portfolios with the global transition to a sustainable economy. We work with institutional and wealth clients worldwide to deliver financial performance alongside measurable positive environmental outcomes. As a cross-asset sustainability specialist, Osmosis leads with innovation, responsible stewardship, and an unwavering commitment to supporting the environmental transition, empowering investors to build a resilient and sustainable future.
Important Information
This press release is issued by Osmosis (Holdings) Limited, a London-based investment management group. Osmosis Investment Management UK Ltd (“Osmosis UK”), Osmosis Investment Management US LLC (“Osmosis US”) and Osmosis Investment management (Australia) Pty Ltd (“Osmosis AUS”) are wholly owned subsidiaries of Osmosis (Holdings) Limited (“OHL”). Osmosis UK is regulated in the UK by the FCA. Osmosis US is a registered investor advisor with the SEC in the US and Osmosis AUS is a corporate authorised representative of Eminence Global Asset Management Pty Ltd (AFSL 305573). Registration with the SEC does not imply any level of skill or training.
Osmosis Investment Management NL B.V. (“Osmosis IM NL”) is a Netherlands-based entity that has obtained a license from the Dutch Authority for the Financial Markets as an independent regulated alternative investment fund manager and provider of discretionary portfolio management services. Osmosis IM NL is an affiliate of Osmosis UK.
Osmosis UK, Osmosis US, Osmosis AUS, and Osmosis IM NL are collectively referred to throughout as “Osmosis”.
*AUM as of 31 October 2025 includes discretionary assets under management of Osmosis, and assets invested in model program provided by Osmosis US, Osmosis AUS, and Osmosis UK.
For more information, please contact Lisa Harrison on +44 7716 912832
[email protected]