REC Silicon

REC Silicon Cyber Security Incident

19 December 2022: REC Silicon ASA ("REC" or the "Company") has learned of a

cyber security incident. The Company's virtual server environment suffered a

ransomware attack that caused business systems to stop functioning for a brief

period of time. The Company engaged an incident response company that

specializes in the recovery of data, restoration of systems, remediation, and

investigation.

All systems of the Company have been successfully restored with only minor

data loss. The Company's production, safety, quality, sales, and revenue were

not affected by the incident. Although all REC systems have been recovered,

regretfully, the threat actor did exfiltrate a limited amount of data that

does not appear to include any significant intellectual property of the

Company. REC has implemented increased security and is taking additional

steps to ensure the protection of its information and server environment from

any future incidents.

Contacts

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Nils O. Kjerstad

IR Contact

Phone: +47 9135 6659

About Us

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REC Silicon is a leading producer of advanced silicon materials, delivering

high-purity polysilicon and silicon gas to the solar and electronics

industries worldwide. We combine over 30 years of experience and proprietary

technology with the needs of our customers, with annual production capacity of

more than 20,000 MT of polysilicon from our two US-based manufacturing plants.

Listed on the Oslo Stock Exchange (ticker: RECSI), the Company is

headquartered in Lysaker, Norway.

For more information, go to: www.recsilicon.com

This information is subject to disclosure under the Norwegian Securities

Trading Act, §5-12. The information was submitted for publication at

2022-12-19 08:00 CET.

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