Upstream Bio, Inc.
For the period ended Dec 31, 2025. Filed Mar 26, 2026.
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FY2025 · Filed Mar 26, 2026
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Item 2. Properties
Our corporate headquarters is presently located in Waltham, Massachusetts, where we lease and occupy 16,801 square feet of office space. The initial term of the lease expires on November 1, 2027, with an option to extend the lease for an additional three years thereafter.
We believe that our leased premises will be sufficient for our needs for the foreseeable future. To meet the future needs of our business, we may lease additional or alternate space, and we believe suitable additional or alternative space will be available in the future on commercially reasonable terms.
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