Polymarket hit by $10m fraud attempt as CEO pushed growth: WSJ

Fraudsters allegedly tried to steal funds via stolen debit cards, & CEO Shayne Coplan reportedly told staff to worry about fines later, per the WSJ.

The hit

Polymarket’s CEO allegedly told staff to focus on growth after fraudsters attempted to steal $10m using stolen debit cards, according to a Wall Street Journal investigation. The report says compliance staff were surprised when CEO Shayne Coplan said to worry about regulatory fines later.

Why it matters

For bettors, the episode shows how thin fraud controls can get when a platform chases growth. Polymarket reportedly dropped a rule tying withdrawals to the same payment source, a common anti-money-laundering safeguard, even after staff warned it could invite more attacks. The fallout has already cost several senior compliance & leadership roles & lands as Polymarket eyes a public listing, raising questions about oversight ahead of any IPO.

The record

Feb 2026	Fraud attempt begins, at least $10m sought via stolen debit cards (WSJ)
Checkout.com fraud rate	>80% of Polymarket US deposits flagged fraudulent, vs ~1% industry norm (WSJ)
Attack scale	~7 users behind bulk of attack; one made ~4,000 deposit attempts (WSJ)
April 2026	US compliance chief Andrew Clifford resigns; US CEO Justin Hertzberg later fired (WSJ)
July 2026	Hackers compromise ~500 user accounts via registration flaw (WSJ)

What happens next

Watch for regulatory response to the WSJ findings & further disclosures as Polymarket pursues a possible IPO; the firm has not detailed how much of the attempted theft succeeded.

Sources: Polymarket faced $10 million fraud attempt as its CEO pushed growth over compliance concerns: WSJ

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