Company: REVB
Filing Date: 2025-05-23
Form Type: S-1/A
Source: 0001213900-25-047104
Chunk: 215

Company: REVELATION BIOSCIENCES, INC.
Filing Date: 2025-05-23
Form: S-1/A
Chunk 215
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 the Class E Warrant Inducement and treated
as equity. The Class G Common Stock Warrants are exercisable for a period of five years from . As part
of the 2025 Reverse Stock Split on January 28, 2025, the number of shares of common stock the Class G Common Stock Warrants
are exercisable into was reset from to and the exercise price of the Class G Common Stock Warrants was reset from
$ to $.

F-24 REVELATION BIOSCIENCES, INC.
Notes to the Consolidated Financial Statements 10. Warrants(cont.)

The fair value of the Class G
Common Stock Warrants were estimated using the Black-Scholes option pricing model with the following assumptions:

| Volatility              |     |  100 | % |
| Expected term (years)   |     |    5 |   |
| Risk-free interest rate |     | 4.38 | % |
| Expected dividend yield |     |  0.0 | % |

11. Income Taxes

The Company did t record
a provision for income taxes for the years ended December 31, 2024 and December 31, 2023 due to a full valuation allowance
against its deferred tax assets.

The difference between the
provision for income taxes and income taxes computed using the effective U.S. federal statutory rate is as follows:

|                                                       |     | Year Ended   
 December 31, |  2024 |   |     |     |     2023 |   |
|:------------------------------------------------------|:----|:-------------|------:|:--|:----|:----|---------:|:--|
| Federal tax statutory rate                            |     |              |  21.0 | % |     |     |     21.0 | % |
| State tax, net of federal benefit                     |     |              |   7.2 |   |     |     |      7.2 |   |
| Non-taxable change in fair value of warrant liability |     |              |   0.2 |   |     |     |  1,953.2 |   |
| Research and development credits                      |     |              |   0.5 |   |     |     |     37.8 |   |
| Change in valuation allowance                         |     |              | (28.9 | ) |     |     | (2,019.2 | ) |
| Effective tax rate