An anonymous director reports

WESTPORT'S STATEMENT ON CYBERSECURITY INCIDENT

On March 17, 2026, Westport Fuel Systems Inc. identified unauthorized access to its network. This incident involved unauthorized access to certain of Westport's internal IT business applications along with other business and employee information.

Immediately upon learning of the incident, the company engaged experts, activated its incident response protocol and took action to contain the incident. The company's investigation is continuing. The company is in the process of identifying additional security protocols that it can implement to respond to the evolving landscape of cybersecurity threats.

The company's manufacturing operations are managed on dedicated servers that are separate from those accessed in connection with this incident. As a result, the incident has not affected the continuity of the company's manufacturing activities. Westport's ability to fulfill customer orders and maintain operational delivery remains fully intact, with no disruptions anticipated. The company currently does not expect a material impact on its daily business operations.

Given the timing of this incident within the company's year-end financial reporting cycle, Westport is undertaking an essential internal assessment of the integrity and accuracy of its financial results prior to releasing them. As a result, the company expects the company will be filing its annual financial results after the March 31, 2026, continuous disclosure deadline required under applicable securities laws.

About Westport Fuel Systems Inc.

Westport is a technology and innovation company connecting synergistic technologies to power a cleaner tomorrow. As a leading supplier of affordable, alternative fuel, low-emissions transportation technologies, the company designs, manufactures, and supplies advanced components and systems that enable the transition from traditional fuels to cleaner energy solutions.

The company's proven technologies support a wide range of clean fuels -- including natural gas, renewable natural gas and hydrogen -- empowering OEMs (original equipment manufacturers) and commercial transportation industries to meet performance demands, regulatory requirements and climate targets in a cost-effective way. With decades of expertise and a commitment to engineering excellence, Westport is helping its partners achieve sustainability goals -- without compromising performance or cost-efficiency -- making clean, scalable transport solutions a reality.

Westport Fuel Systems is headquartered in Vancouver, Canada.

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