Polymarket Names Former Amazon Finance Chief Warren Jenson as First CFO

Polymarket appointed Warren Jenson as its first Chief Financial Officer on September 10, 2026, according to Crypto Briefing. Jenson, who previously held CFO positions at Amazon, Electronic Arts, Delta Air Lines, and NBC, will report directly to Polymarket founder Shayne Coplan.

The hire arrives as Polymarket pursues a funding round of approximately $1 billion at a $21 billion valuation, led by 1789 Capital. The appointment signals preparation for institutional-scale operations as the prediction-market platform competes with Kalshi, which has captured trading volumes nearly five times those of Polymarket as of August 2026.

Polymarket was originally a crypto-native platform running on Polygon that historically excluded U.S. users due to regulatory ambiguity, per Crypto Briefing. The platform relaunched as a CFTC-regulated exchange following its relaunch in late 2025. Since that relaunch, Polymarket's annualized revenue run rate has surpassed $1 billion, according to Crypto Briefing.

Kalshi succeeded through a legal challenge to the CFTC, which cleared the way for it to offer regulated event contracts to U.S. users. Polymarket faces the challenge of competing against a rival that has already secured regulatory approval and captured market share. Crypto Briefing reports that Polymarket recently introduced a feature called Squads in its U.S. app, a social layer designed to keep users engaged between major political or sporting events.

Jenson's background spans companies at different stages of scale and monetization complexity. At Amazon, he served as CFO during the company's transition from an online bookstore into a logistics and cloud juggernaut, per Crypto Briefing. His experience at Electronic Arts provided expertise in platform monetization, user retention metrics, and live-service economics. Jenson also sits on the boards of Dropbox and Ripple, according to Crypto Briefing.