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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities and Exchange Act of 1934
Date of Report (Date of earliest event reported): November 9, 2026
CASTELLUM, INC.
(Exact name of Registrant as specified in its charter)
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| Nevada | | 001-41526 | | 27-4079982 |
(State or other jurisdiction of incorporation) | | (Commission File Number) | | (IRS Employer Identification No.) |
1934 Old Gallows Road, Suite 350
Vienna, VA 22182
(Address of principal executive offices, including zip code)
(703) 752-6157
(Registrant’s telephone number, including area code)
Check the appropriate box below if the 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions:
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| ☐ | Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |
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| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |
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| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
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| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13(c)). |
Securities registered pursuant to Section 12(b) of the Act:
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| Title of each class | | Trading Symbol(s) | | Name of each exchange on which registered |
| Common stock, par value $0.0001 per share | | CTM | | NYSE American LLC |
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).
Emerging growth company ☒
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☒
Item 8.01 Other Events.
On November 9, 2026, Castellum, Inc. (the "Company") issued a press release announcing a $6.0 Million share repurchase program (the "Repurchase Plan") pursuant to which the Company may repurchase up to $6.0 million of its outstanding common stock over a 12-month period commencing on November 12, 2026. The Repurchase Plan provides that repurchases may be effected from time to time through open-market purchases, privately negotiated transactions or other means, subject to market conditions, applicable legal requirements and other relevant factors.
Repurchases are expected to be conducted in accordance with the requirements of Rule 10b-18 under the Securities Exchange Act of 1934, as amended, including applicable volume, timing, price and broker-dealer limitations.
The full text of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.
Item 9.01 Financial Statements and Exhibits.
(d) Exhibits.
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| Exhibit No. | Exhibit Title |
| 99.1 | |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.
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| | CASTELLUM, INC. | | |
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| Date: November 10, 2026 | | By: | /s/ Glen R. Ives | |
| | Name: | Glen R. Ives | |
| | Title: | Chief Executive Officer (Principal Executive Officer) |