Material Agreement (Form 8-K)

On December 17, 2025, Ouster, Inc. (the "Company") entered into the fourth amendment (the "Fourth Amendment") to the NNN Lease Agreement with SIC-350Treat, LLC, as amended, for its headquarters in San Francisco, California (the "NNN Lease"). The Fourth Amendment provides for, among other things, an extension of the term of the NNN Lease to August 31, 2034, and an initial decrease in the annual base rent to $50.00 per rental square foot, effective as of January 1, 2026, with annual adjustments thereafter.

The foregoing description of the Fourth Amendment to the NNN Lease does not purport to be complete and is subject to, and is qualified in its entirety by, the full text of the Fourth Amendment, a copy of which is attached as Exhibit 10.1 to this Current Report on Form 8-Kand is incorporated herein by reference herein.