U.S. cryptocurrency exchange Coinbase is under fire—this time in the form of a class action lawsuit. Investor Brady Nessler claims the company withheld crucial information about a serious data breach and failed to disclose regulatory issues in the UK, ultimately harming shareholders.
According to the lawsuit, Coinbase deliberately delayed disclosing a security incident that compromised customer data and failed to properly inform investors about a $4.5 million fine imposed by the UK’s Financial Conduct Authority (FCA). Both events allegedly had a negative impact on stock value and investor trust.
Data breach and extortion: details emerged too late
Coinbase reportedly fell victim to a sophisticated cyberattack during which hackers obtained sensitive client data, including names, addresses, and identification information. The attackers allegedly bribed foreign support staff to gain access.
More troubling, the lawsuit states Coinbase kept this incident hidden from the public. It wasn’t until May 15, 2025—months after the breach—that the company confirmed a $20 million extortion attempt. On that same day, Coinbase stock dropped sharply by 7.2%, closing at $244 per share.
“By keeping this hidden, investors lost millions. Coinbase breached its duty to inform shareholders and caused serious harm,” the lawsuit claims.
Second blow: fine from UK regulators
The lawsuit also references a July 2024 fine from the FCA, imposed on Coinbase’s British subsidiary, CB Payments Ltd. The regulator found that CBPL allowed access to over 13,000 high-risk users in violation of a 2020 agreement banning such onboarding.
As a result, nearly $226 million in crypto transactions were processed illegally. When this fine was announced, Coinbase’s stock fell 5.52% to $231.52 per share.
Lawsuit demands: compensation and a trial
Nessler is requesting class action status for the suit and is seeking financial compensation for all shareholders who purchased COIN stock between April 2021 and May 2025. He is also asking for legal fees to be covered and for the case to go to jury trial.
Coinbase has not yet issued a public response. Since the disclosure, COIN shares have partially recovered but still dropped 3.23% on May 23, closing at $263.10, according to Yahoo Finance.
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