Company: REVB
Filing Date: 2025-04-04
Form Type: DRS
Source: 0001213900-25-029022
Chunk: 210

Company: REVELATION BIOSCIENCES, INC.
Filing Date: 2025-04-04
Form: DRS
Chunk 210
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   |     |    5 |   |
| Risk-free interest rate |     | 4.20 | % |
| Expected dividend yield |     |  0.0 | % |

Modification of the Class D Common Stock Warrants and Class E Common Stock Warrants As part of the Class D Warrant Inducement, the 2,548,060 Class D Common Stock Existing Warrants to purchase up to 159,249shares of common stock were modified. Due to the warrant modification the fair value of the Class D Common Stock Existing Warrants were revalued before and after the warrant modification, and as the warrant modification is directly attributable to an equity offering, the Company recognized the effect of the warrant modification of approximately $0.9 million using the Black -Scholesoption pricing model. In connection with the Class D Warrant Inducement, the Company issued 5,096,120 Class E Common Stock Warrants to purchase up to 318,509shares of common stock at an exercise price of $16.00 per share, valued on the Class D Warrant Inducement date in the aggregate at $4.9 million and included in the issuance costs of the Class D Warrant Inducement and treated as equity. The Class E Common Stock Warrants were exercisable immediately upon issuance, provide for a cash or cashless exercise right and expire on August 22, 2029. As of December 31, 2024, there are 1,032,080 Class E Common Stock Warrants outstanding to purchase 64,506shares of common stock that were not included in the Class E Warrant Inducement. The fair value of the Class D Common Stock Existing Warrant modification and the Class E Common Stock Warrants were estimated using the Black -Scholesoption 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 4,064,040 Class F Common Stock Warrants to purchase up to 254,002shares of common stock at an exercise price of $16.00 per share. The Class