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IonQ to buy cybersecurity firm Elisity in $1.3 billion stock deal

10/12/2026

Quantum computing company IonQ announced on Monday that it will acquire cybersecurity firm Elisity in an all-stock transaction valued at up to $1.3 billion.

The agreement includes up to $150 million in performance-based earnouts and is expected to close in the fourth quarter, subject to regulatory approval.

The acquisition is intended to defend against and identify attackers targeting generative AI large-language models and AI agents, while also protecting against emerging quantum threats, according to a joint press release.

Niccolo de Masi, IonQ's chairman and CEO, stated that integrating Elisity's team positions the company to help customers safeguard critical infrastructure and enterprise networks during the transition to the quantum era.

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