Castellum, Inc.
3 Bethesda Metro Center, Suite 700
Bethesda, MD 20814
December 8, 2023
United States Securities and Exchange Commission
Division of Corporation Finance
Office of Trade & Services
100 F Street, N.E.
Washington, D.C. 20549
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| Re: | Castellum, Inc. |
| Registration Statement on Form S-1 (File No. 333-275840) |
Ladies and Gentlemen:
In accordance with Rule 461 of the Securities Act of 1933, as amended, Castellum, Inc. hereby respectfully requests that the effective date of the above-captioned Registration Statement be accelerated so that it will be declared effective at 5:00 p.m. Eastern Time on Tuesday, December 12, 2023, or as soon thereafter as possible.
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| Very Truly Yours, |
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| CASTELLUM, INC. |
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| /s/ Mark C. Fuller |
| Mark C. Fuller |
| Chief Executive Officer (Principal Executive Officer) |
