Millburn Promotes Dr. Michael Soss to Co-Chief Investment Officer


Soss headerMillburn Ridgefield Corporation (“Millburn”), the multi-billion AuM quantitative investment firm based in New York, is pleased to announce the promotion of Michael Soss, PhD, to the position of co-Chief Investment Officer, effective March 1, 2024.

Soss is a member of Millburn’s Investment Committee and shares responsibility for Millburn’s investment functions, comprising research and development, modeling, portfolio construction, trading, and technology, with Grant Smith, Millburn’s current Chief Investment Officer and co-CEO.  With Soss’ promotion, Smith’s title changes to co-Chief Investment Officer; Smith’s title as co-Chief Executive Officer remains unchanged, as does his role as a member of the firm’s Investment and Executive Committees. 

Soss joined Millburn in January 2022 in the newly created role of Deputy Chief Investment Officer. Prior to joining Millburn, Soss was employed at Point72 Asset Management in New York and Stamford, Connecticut, where he worked for more than five years in leadership roles spanning risk and trading research, and most recently headed the firm’s Fusion group, a quant trading division focused on internal alpha capture. Prior to his time at Point72, Soss was an Executive Director at J.P.Morgan in New York. Soss’ other experience includes SECOR Asset Management, where he was Head of Equities, and Goldman Sachs, where he was a Trader and co-Head of Equity Systematic Trading.

Soss holds an AB in Mathematics from Harvard University, and MSc and PhD degrees in Computer Science from McGill University in Montreal, Canada.  
Smith comments: “Since joining Millburn more than two years ago, Michael has demonstrated his ability to add value, taking on increasing responsibility in the development of Millburn’s research pipeline and scaling of the firm’s infrastructure platform—updates that I expect will form the backbone of Millburn's investment process for the foreseeable future. I’m excited to have Michael assume this role and look forward to continuing to work together with him.”


Millburn has a legacy of systematic, quantitative investing that dates back to 1971. Today, the firm applies advanced statistical research, including innovative machine learning approaches, to make price forecasts in liquid global markets across a range of asset classes. Millburn’s teams utilize technology, data, and practical market experience to search for opportunity across a variety of economic cycles and environments—including stress periods for traditional investments.

As of March 1, 2024, the firm had 57 employees and offices in New York and London, and an affiliate in Shanghai, China with an additional 18 staff.


Graig Norden   
Senior Manager, Marketing Communications
Millburn Ridgefield Corporation