Company: REVB
Filing Date: 2025-05-20
Form Type: S-1
Source: 0001213900-25-045828
Chunk: 86

Company: REVELATION BIOSCIENCES, INC.
Filing Date: 2025-05-20
Form: S-1
Chunk 86
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 and development expenses                 |     | $    |      858,830 |     |      | 717,582 |     |        | 141,248 |   |     | $    |    3,548,996 |     |      | 4,145,902 |     |        |   (596,906 | ) |

Research and development expenses increased by $0.1 million, from $0.7 million for the three months ended March 31, 2024 to $0.9 million for the three months ended March 31, 2025. The increase was primarily due to increases of $0.1 million of clinical study expense and $0.07 million of personnel expenses, offset by a decrease of $0.07 million of other research and development expenses. Other program expenses include pre-clinical costs and clinical preparation costs primarily for new programs. Research and development expenses decreased by $0.6 million, from $4.1 million for the year ended December 31, 2023 to $3.5 million for the year ended December 31, 2024. The decrease was primarily due to decreases of $2.1 million in other program expenses and $0.3 million in manufacturing expenses, offset by increases of $1.5 million in clinical study expenses related to product candidates and $0.5 million in personnel expenses. Other program expenses include pre-clinical costs and clinical preparation costs primarily for programs our Phase 1b clinical study. 50 General and Administrative Expenses The following table summarizes our general and administrative expenses for the periods presented:

|                                                                  |     | Year Ended December 31, |      2024 |     |   |      2023 |     |   |   Change |   |
|:-----------------------------------------------------------------|:----|:------------------------|----------:|:----|:--|----------:|:----|:--|---------:|:--|
| Personnel expenses (including employee stock-based compensation) |     | $                       | 2,768,602 |     | $ | 2,272,005 |     | $ |  496,597 |   |
| Legal and professional fees                                      |     |                         | 1,274,567 |     |   | 1,844,077 |     |   | (569,510 | ) |
| Other expenses                                                   |     |                         |   382,944 |     |   |   394,680 |     |