Company: REVB
Filing Date: 2025-05-20
Form Type: S-1
Source: 0001213900-25-045828
Chunk: 228

Company: REVELATION BIOSCIENCES, INC.
Filing Date: 2025-05-20
Form: S-1
Chunk 228
---
 on the grant date and such options are not exercisable after five yearsfrom the grant date. As of March 31, 2025, there were 97,880shares available for future grants under the 2021 Plan. Restricted Stock Units As of March 31, 2025 and December 31, 2024, the Company has a total of 3Rollover RSU awards for shares of common stock outstanding, respectively. As of March 31, 2025, 3Rollover RSU awards have fully vested but are unissued and no Rollover RSU awards have been forfeited. Each Rollover RSU award converts to one share of common stock. Restricted Stock Awards On February 11, 2025, 58,568RSAs were granted to employees and the Board of Directors which resulted in a fair value of $ 0.2million of stock-based compensation expense based on the Company’s stock price on the date of grant. The awards were granted from shares available under the 2021 Plan with 57,665vesting 100% on the date of grant and 903vesting 50% on the date of grant, with 50% vesting oneyear thereafter. Stock Options The Company has granted stock options, all of which have fully vested in prior periods.Stock options have a maximum term of 3or 10years. There were nostock options granted during the three months ended March 31, 2025 and 2024. As of March 31, 2025, the Company had 64stock options outstanding and exercisable, with a weighted average exercise price of $ 3,555.83, and a weighted average remaining contractual term of 7.2years. There was nounrecognized compensation expense related to the outstanding stock options as of March 31, 2025. F-37

Stock-Based Compensation Expense

For the three months ended March 31, 2025
and 2024, the Company recorded stock-based compensation expense for the periods indicated as follows:

| General and administrative:                                 |     | Three Months Ended 
 March 31,          
 2025               |         |     | 2024 |        |
|:------------------------------------------------------------|:----|:-------------------|--------:|:----|:-----|-------:|
| RSA awards                                                  |     | $                  | 189,348 |     | $    |      — |
| RSU awards                                                  |     |