MEDICINOVA INC Commitments Disclosure

5. Commitments and Contingencies

Lease Commitments

The Company has operating leases primarily for real estate in the United States and Japan. The United States lease is for the Company’s headquarters in San Diego and has a term of five years ending January 31, 2027, with annual escalations. In April 2024, the Company provided notice to terminate its previous lease agreement for its Tokyo office, effective October 2024, and in May 2024, the Company entered into a new lease agreement, effective June 2024, for a different office space for its Tokyo location. The new lease had an initial lease term of 12 months ending May 2025, following which the Company exercised its option to extend for an additional two months. Thereafter, there will be automatic two-month renewals until the lease is terminated. In measuring the lease liability, the Company determined that it was reasonably certain that it would exercise one renewal option. Accordingly, the Company used a lease term of 14 months in measuring the lease liability. The Company measured the lease liability based on the present value of the future lease payments, including the one extension option that is reasonably certain to be exercised, discounted using the estimated incremental borrowing rate of 6.51%, which is the interest rate that the Company would have to pay to borrow on a collateralized basis over a similar term for an amount equal to the lease payments at initial commencement. The real estate operating leases are included in “Right-of-use asset” on the Company's consolidated balance sheets and represents the Company’s right to use the underlying assets for the lease term. The Company’s obligation to make lease payments are included in "Operating lease liability" and "Other non-current liabilities" on the Company's consolidated balance sheets.

License and Research Agreements

The Company has entered into in-licensing agreements with various pharmaceutical companies. Under the terms of these agreements, the Company has received licenses to research, know-how and technology claimed in certain patents or patent applications. Under these license agreements, the Company is generally required to make upfront payments and additional payments upon the achievement of milestones and/or royalties on future sales of products until the later of the expiration of the applicable patent or the applicable last date of market exclusivity after the first commercial sale, on a country-by-country basis.

No milestone payments have been made under these agreements during the years ended December 31, 2025 and 2024. For products currently in development, future potential milestone payments based on product development of MN-166 (ibudilast) and MN-001 (tipelukast) are $10 million as of December 31, 2025. For all other products, future potential milestone payments related to development milestones and commercialization milestones totaled $16.5 million as of December 31, 2025. There are no minimum royalties required under any of the license agreements. The Company is unable to estimate with certainty the timing on when these milestone payments will occur as these payments are dependent upon the progress of the Company’s product development programs.

Legal Proceedings

From time to time, the Company may be subject to legal proceedings and claims in the ordinary course of business. The Company is not aware of any such proceedings or claims that it believes will have, individually or in aggregate, a material adverse effect on its business, financial condition or results of operations.