Company: REVB
Filing Date: 2025-05-20
Form Type: S-1
Source: 0001213900-25-045828
Chunk: 216

Company: REVELATION BIOSCIENCES, INC.
Filing Date: 2025-05-20
Form: S-1
Chunk 216
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 the Class D
Common Stock Existing Warrant modification and the Class E Common Stock Warrants were estimated using the Black-Scholes option pricing
model with the following assumptions:

| Volatility              |     |   95 | % |
| Expected term (years)   |     |    5 |   |
| Risk-free interest rate |     | 3.77 | % |
| Expected dividend yield |     |  0.0 | % |

Class F Common Stock Warrants and Class G Common Stock Warrants

In connection with the Class E
Warrant Inducement to exercise the Class E Common Stock Existing Warrants, the Company issued Class F Common Stock
Warrants to purchase up to shares of common stock at an exercise price of $ per share. The Class F Warrants have an
alternative cashless exercise provision that allows the holder thereof to receive shares of common stock without payment of the exercise
price. The Company valued the Class F Common Stock Warrants based on the alternative cashless exercise provision issued and recognized
approximately $ million and included in the issuance costs of the Class E Warrant Inducement and treated as equity. The Class F
Common Stock Warrants are exercisable for a period of two years from .

In connection with the Class E
Warrant Inducement to exercise the Class E Common Stock Existing Warrants, the Company issued Class G Common Stock
Warrants to purchase up to shares of common stock at an exercise price of $ per share, valued on the Class E Warrant
Inducement date in the aggregate at $ million and included in the issuance costs of 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