Polymarket's investors made its CEO repay private-jet and rent spending, and now push for a COO as Kalshi pulls ahead
What's going on? When Founders Fund was weighing an investment in Polymarket in 2025, its due diligence found that founder and CEO Shayne Coplan had been using company money for private jet flights, his apartment rent and other personal expenses, at a time when the prediction market had no revenue, Bloomberg reported on 20 Oct 2026. Peter Thiel's firm made its check conditional on Coplan repaying the money and finishing changes to the company's financial controls. He repaid it, and the deal went ahead at a valuation of about $1.2bn.
Polymarket's side: A spokesperson told Bloomberg the jet was used for business and that Coplan had disclosed the expense to investors himself. Coplan acknowledged "real growing pains" and said he had to personally grow into what the company needed, making the hiring of a strong executive team his top priority for 2026.
Investors push for a deeper bench: According to people familiar with the matter cited by Bloomberg, executives at Intercontinental Exchange (owner of the New York Stock Exchange and a major Polymarket backer) have privately described the challenge of guiding the 28-year-old founder, and both ICE and Founders Fund have recommended he hire a chief operating officer, which he has not yet done. Hiring a CFO was a condition of their 2025 investments: Polymarket named Warren Jenson, a former CFO of Amazon, Electronic Arts and Delta Air Lines, as its first finance chief on 10 Sep 2026. It has also brought in executives from Goldman Sachs, DoorDash, Robinhood and the FBI.
Why it matters: the Kalshi gap. The governance pressure comes as Polymarket loses the prediction-market race to Kalshi. Bloomberg says Polymarket, once the volume leader, is dealing with outages, customer complaints, lawsuits and a new CFTC probe, and that the National Futures Association separately warned it about its record-keeping. Over the record weekend of 17–18 Oct, Kalshi took about 58% of more than $11bn in notional volume across reporting US venues, while Polymarket's US exchange took about 10% (around $1bn), according to industry trackers. Polymarket is raising at a $21bn valuation in a round led by 1789 Capital, where Donald Trump Jr. is a partner, with Founders Fund taking part; Kalshi is seeking an even higher valuation.
Confirmed vs reported: The CFO hire is on the record. The expense repayment, ICE's private comments and the COO recommendation come from people familiar with the matter and have not been confirmed by the investors. Weekend volume figures are preliminary and count the face value of contracts, which flatters low-priced sports parlays.
Sources: Bloomberg, "Private Jets, Investor Pressure Push Polymarket CEO to Grow Up" (Ben Weiss & Annie Massa, 20 Oct 2026); Polymarket press release on Warren Jenson (10 Sep 2026); Predictable (20 Oct 2026); Called It, record prediction-market weekend (20 Oct 2026).
