Logitech Cybersecurity Disclosure

SIX Swiss Exchange Ad hoc announcement pursuant to Art. 53 LR — Logitech International (SIX: LOGN) (Nasdaq: LOGI) today shared the Company recently experienced a cybersecurity incident relating to the exfiltration of data. This incident has not impacted Logitech’s products, business operations or manufacturing.

Upon detecting the incident, Logitech promptly took steps to investigate and respond, with the assistance of leading external cybersecurity firms.

While the investigation is ongoing, at this time Logitech believes that the unauthorized third party used a zero-day vulnerability in a third-party software platform and copied certain data from the internal IT system. The zero-day vulnerability was patched by Logitech following its release by the software platform vendor. The data likely included limited information employees and consumers, and data relating to customers and suppliers. Logitech does not believe any sensitive personal information, such as national ID numbers or credit card information, was housed in the impacted IT system. Logitech has begun the process to notify government entities as required.

At this time, Logitech believes that the incident will not have a material adverse effect on its financial condition or results of operations.

Logitech maintains a comprehensive cybersecurity insurance policy, which the Company expects will cover costs associated with incident response and forensic investigations, as well as business interruptions, legal actions and regulatory fines, if any, subject to policy limits and deductibles.

Logitech designs software-enabled hardware solutions that help businesses thrive and bring people together when working, creating and gaming. As the point of connection between people and the digital world, our mission is to extend human potential in work and play, in a way that is good for people and the planet. Founded in 1981, Logitech International is a Swiss public company listed on the SIX Swiss Exchange (LOGN) and on the Nasdaq Global Select Market (LOGI). Find Logitech and its other brands, including Logitech G, at or company blog .

Logitech and other Logitech marks are trademarks or registered trademarks of Logitech Europe S.A. and/or its affiliates in the U.S. and other countries. All other trademarks are the property of their respective owners. For more information Logitech and its products, visit the company’s website at .

Editorial Contacts: Nate Melihercik, Head of Investor Relations - ir@logitech.com Bruno Rodriguez, Head of Corporate Communications - [email protected] Ben Starkie, Corporate Communications - +41 (0) 79-292-3499, [email protected]

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