REVELATION BIOSCIENCES, INC. Commitments Disclosure

4. Commitments and Contingencies

Lease Commitments

The Company leases office space located at 4660 La Jolla Village Dr., Suite 100, San Diego, California, through a month-to-month rental agreement, with monthly rent of $151. Beginning in February 2021, the Company leased 2,140 square feet of laboratory space in San Diego, California (the “Lease”). In December 2024, the Company signed an amendment extending the Lease term until February 28, 2025. The base monthly rent was equal to $5,350, and the Company was required to maintain a security deposit of approximately $6,000. The Lease contained customary default provisions, representations, warranties and covenants. In addition to base rent, the Lease required the Company to pay certain taxes, insurance and operating costs relating to the leased premises. In 2024 upon amending the lease agreement, the Company applied the short-term lease exception as the amendment was less than twelve months. The Lease was classified as an operating lease. Subsequent to the expiration of the Lease, the Company began leasing the same space on a month-to-month basis with monthly rent of $5,350 per month, through December 31, 2025.

In November 2025, the Company entered into a new lease for laboratory and office space (the “Oberlin Lease”), which commenced on December 1, 2025. The Oberlin Lease, which is an operating lease, has a non-cancelable term of three years, with one three-year renewal option at fair market value. The exercise of the renewal option is not recognized as part of the right-of-use asset and lease liability, as the Company did not conclude that the exercise of renewal was reasonably certain to occur. The Oberlin Lease requires base monthly rent of approximately $33,000 which escalates annually by 3%, and contains provisions for free rent periods and an allowance for tenant improvements of up to approximately $54,000. In addition to base rent, the Oberlin Lease requires the Company to pay certain taxes, insurance and operating costs relating to the leased premises, which represent variable lease costs. On the lease commencement date, the Company recognized a right-of-use asset and lease liability of approximately $741,000 on its consolidated balance sheet. As the Oberlin Lease does not provide an implicit rate, the Company used its incremental borrowing rate of 9.5%, which was determined using a set of peer companies’ incremental borrowing rates. As of December 31, 2025, the remaining lease term of the Oberlin Lease was 2.9 years.

Commitments

The Company enters into contracts in the normal course of business with third party service providers and vendors. These contracts generally provide for termination on notice and, therefore, are cancellable contracts and not considered contractual obligations and commitments.

Contingencies

From time to time, the Company may become subject to claims and litigation arising in the ordinary course of business. The Company is not a party to any material legal proceedings, nor is it aware of any material pending or threatened litigation.