Amplitude shares move following security update; Coinbase clarifies no data breach

What happened: Amplitude (AMPL) released an update about a security incident in which its security team detected, contained, and remediated unauthorized access to a localized portion of its internal systems. Coinbase clarified there was no data breach. Key numbers: Incident detected September 28, 2026. Shares dipped over 3% in extended trading. Why it matters: The share move followed the security update, while Coinbase's clarification indicated no data breach on its side.

Amplitude (AMPL) released an update about a security incident in which its security team detected, contained, and remediated unauthorized access to a localized portion of its internal systems. Coinbase clarified there was no data breach.

The share move followed the security update, while Coinbase's clarification indicated no data breach on its side.