Commitments and Contingencies
Leases
In May 2021, the Company entered into a sublease agreement for office space located in Boston, Massachusetts. The sublease expires on February 28, 2026. The base rent increases by approximately 2% annually. The Company issued a letter of credit to the landlord related to the security deposit, secured by restricted cash (Note 2). This lease qualifies as an operating lease. At inception, the Company recorded an operating lease right-of-use asset and operating lease liability of $4.1 million.
The following table summarizes the presentation of the operating lease in the Company’s consolidated balance sheets (in thousands):
As of December 31,
20252024
Assets:
Operating lease right-of-use assets$92 $1,131 
Liabilities:
Current operating lease liabilities$110 $1,259 
Non-current portion of operating lease liabilities— 110 
Total lease liabilities$110 $1,369 
The following table summarizes total lease costs recognized in the Company’s consolidated statements of operations (in thousands):
For the year ended December 31,
202520242023
Operating lease cost$1,102 $1,102 $1,102 
Variable lease costs51 33 14 
Total lease costs$1,153 $1,135 $1,116 
Variable lease costs were primarily related to operating expenses associated with the operating leases, which were assessed based on the Company’s proportionate share of such costs for the leased premises. As these costs are generally variable in nature, they were not included in the measurement of the operating lease right-of-use asset and related lease liability. Total lease costs are included as operating expenses in the Company’s consolidated statements of operations and comprehensive loss.
Future lease payments under non-cancelable lease agreements as of December 31, 2025 were as follows (in thousands):
Year Ended December 31,Future Lease
Payments
2026$110 
2027— 
Total future lease payments110 
Less: interest— 
Present value of operating lease liabilities$110 
The weighted average remaining lease term and weighted average incremental borrowing rate of the Company’s operating lease were as follows: 
As of December 31,
20252024
Weighted average remaining lease term (in years)0.11.1
Weighted average incremental borrowing rate9.0 %9.0 %
In September 2025, the Company entered into a license agreement with the building owner for its existing office space located in Boston, Massachusetts, which will commence on March 1, 2026 and expire on March 31, 2027. As of December 31, 2025, the license agreement had not yet commenced and, accordingly, no right-of-use asset or lease liability or related lease payments had been recorded. Upon commencement, the license agreement will be accounted for as an operating lease under ASC 842.
Legal Proceedings
The Company, from time to time, may be party to litigation arising in the ordinary course of business. The Company was not subject to any material legal proceedings during the years ended December 31, 2025, 2024, and 2023, and no material legal proceedings are currently pending or threatened.
Purchase Orders
The Company has agreements with third parties for various services, including services related to research, preclinical and clinical operations and support, for which the Company is not contractually able to terminate for convenience to avoid future obligations to the vendors. Certain agreements provide for termination rights subject to termination fees or wind down costs. Under such agreements, the Company is contractually obligated to make certain payments to vendors, primarily to reimburse them for their unrecoverable outlays incurred prior to cancellation. The actual amounts the Company could pay in the future to the vendors under such agreements may differ from the purchase order amounts due to cancellation provisions.
Indemnification Agreements
The Company enters into indemnification agreements and agreements containing indemnification provisions in the ordinary course of business. Pursuant to these agreements, the Company agrees to indemnify, hold harmless, and to reimburse the indemnified party for losses suffered or incurred by the indemnified party, generally the Company’s business partners, in connection with any U.S. patent or any copyright or other intellectual property infringement claim by any third party with respect to the Company’s products. The term of these indemnification agreements is generally perpetual upon execution of the agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited. The Company has never incurred costs to defend lawsuits or settle claims related to these indemnification agreements.
Agreements
The Company has entered into multiple agreements with third parties under which it may be obligated to make future development, regulatory and commercial milestone payments and royalty payments on future sales of
specified product candidates. Payments under these agreements generally become due and payable upon achievement of such milestones and sales. When the achievement of these milestones or sales have not occurred, such contingencies are not recorded in the Company's financial statements.

Historical Timeline

Fiscal YearFiled
2025Feb 19, 2026Showing above
2024Feb 28, 2025
2023Mar 5, 2024
2022Feb 7, 2023
2021Feb 28, 2022
2020Mar 17, 2021

About Commitments Disclosures

Commitments and contingencies disclosures catalog a company's off-balance-sheet obligations and legal exposures — purchase commitments, guarantee arrangements, pending litigation, and regulatory proceedings. These items represent potential future cash outflows that may not appear as liabilities on the balance sheet until they become probable and estimable.

Key signals: litigation reserves and disclosed loss ranges quantify management's estimate of legal exposure, but unquantified "reasonably possible" losses often represent the larger risk. Watch for changes in language around pending cases — shifts from "remote" to "reasonably possible" or increases in estimated loss ranges signal deteriorating outcomes. Unconditional purchase obligations and take-or-pay contracts create fixed cost structures that reduce operational flexibility. Guarantee arrangements for subsidiaries or joint ventures can create cascading obligations. Compare the total commitment schedule against projected free cash flow to assess whether the company can meet its obligations without additional financing.