Polymarket brings on Warren Jenson as new CFO

Polymarket has appointed Warren Jenson as the operator’s new CFO, as confirmed by CEO Shayne Coplan who described the financial executive as a “true legend,” and stated “we’re grateful to have him and excited to learn from him.”

Prior to joining the prediction market operator, Jenson served as Senior Advisor to EQT Group from September 2025 to August 2026, as well as in the same role with McKinsey & Company for the past year. 

In his last executive position, Jenson held the President & CFO titles with Nielsen from October 2023 to January 2025, and has previously maintained similar roles with LiveRamp, Electronic Arts, Amazon, Delta Air Lines and NBC. 

The new Polymarket CFO also serves as a Board Member for Dropbox, Ripple and DigitalOcean alongside his latest appointment, as well as President of the Jenson Company. 

While more on the land-based spectrum, Bally’s Corporation CFO & EVP Mira Mircheva notified the operator of her intentions to step down from the roles – effective September 4 – with Bally’s President George Papanier taking over the position on an interim basis.

Mircheva will still remain with Bally’s through September 30 to ensure a seamless leadership transition, having originally been appointed as CFO & EVP during May 2025. 

Along with CFO responsibilities, Papanier will retain his position as Bally’s President and continue to serve as a member of the operator’s Board of Directors. Bally’s also confirmed the search to identify a permanent CFO has already commenced.

On September 8, NBA star LeBron James formed a new partnership with Polymarket in the latest professional athlete-prediction market collaboration, helping to promote the operator’s new headquarters in New York.

The New York headquarters may be particularly notable given James recently signed a new contract with the neighboring Philadelphia 76ers, although Polymarket has yet to confirm additional details of the collaboration.