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ClearSign Technologies Corp

For the period ended Dec 31, 2025. Filed Mar 31, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 31, 2026

CLIR$2.39+1.4%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

ITEM 2. : PROPERTIES

Our principal office is located at 8023 East 63rd Place, Suite 101 Tulsa, Oklahoma 74133 with satellite offices located in Seattle and Beijing, China. At our principal office in Tulsa, we lease 3,922 square feet of office space, under a lease which expires in September 2027. Monthly minimum rent is approximately $5 thousand with an annual 2.0% increase. The Company also sub-leases 940 square feet of office space located in Seattle, Washington and 656 square feet in Beijing, China. The minimum monthly rent for our Seattle location is approximately $2 thousand with a termination date of September 30, 2026. The term of the Beijing lease began on June 1, 2024 and expires in June 2027. The monthly minimum rent for our Beijing location is approximately $3 thousand (20,000 RMB).

We believe that the facilities we currently lease are adequate to meet our needs for the immediate future, and that, should it be needed, additional space can be acquired or leased to accommodate future growth.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.