Coinbase (Nasdaq: COIN), the largest crypto exchange in the U.S., has revealed that personal data from 69,461 individuals got exposed in the data leak in its filing with the Maine Attorney General’s Office.

The exchange had earlier claimed that the data leak affected less than 1% of its users.

As previously reported, Coinbase CEO Brian Armstrong informed his followers about the leak on X on May 15. The leaked information included customer names, addresses, and emails — with no impact on passwords, private keys, and funds.

The hackers demanded $20 million in Bitcoin from the exchange. Armstrong said he instead announced a $20 million bounty for leads on those responsible.

Only "less than 1% of our monthly transacting users had their records accessed," the CEO said.

As per the latest filing, the incident took place on Dec. 26, 2024, and Coinbase discovered it on May 11, 2025. Of the 69,461 affected customers, approximately 217 reside in Maine.

"We are offering all impacted individuals one year of free credit monitoring and identity protection services," Coinbase said. "The services include credit monitoring, a $1,000,000 insurance reimbursement policy and identity restoration, and dark web monitoring to identify if any information is made available through illegal online forums."

The Department of Justice has opened a probe into the data breach.

The exchange is already under investigation by the Securities and Exchange Commission (SEC) regarding whether it overstated its user numbers in past filings. Coinbase’s chief legal officer, Paul Grewal, called it a “hold-over investigation.”

The COIN stock was trading at $260.41 in pre-market hours at the time of writing, down 0.35% since the last day's close.

Coinbase reveals shocking data leak first appeared on TheStreet on May 21, 2025

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