Polymarket names former Amazon CFO Warren Jenson

Polymarket has appointed Warren Jenson, a former chief financial officer of Amazon, as its first-ever CFO, a move announced on Thursday, September 10, 2026, as the prediction market platform works to close a widening trading-volume gap with its chief rival, Kalshi. Jenson will report directly to founder and CEO Shayne Coplan and will oversee capital strategy, long-range planning and financial infrastructure. His career spans senior finance roles at some of the largest American companies: he held the CFO seat at Amazon, Electronic Arts, Delta Air Lines and NBC, and later served as president and CFO at Nielsen and president at LiveRamp. He holds accounting degrees from Brigham Young University and sits on the boards of DigitalOcean, Dropbox and Ripple. In the announcement, Coplan said the company is assembling a team to match the opportunity in front of it. Jenson said Polymarket created a massive new global market category and that he is joining the leadership team to put the capital strategy and operating discipline in place to move quickly at scale. The hire comes as Kalshi holds a substantial lead in trading volume.