CTM 8-K: Castellum retires note to Robert Eisiminger after $2M paydown

Rhea-AI Filing Summary

Castellum, Inc. (CTM) reported an administrative update: the company completed a $2 million paydown and retired its note payable to Robert Eisiminger.

The update was disclosed under Other Events and includes a press release as Exhibit 99.1. This action removes that specific note obligation from the balance sheet.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

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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 13, 2025

CASTELLUM, INC.

(Exact name of Registrant as specified in its charter)

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:

☐			Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐			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:

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 13, 2025, Castellum, Inc. announced it completed a $2 Million paydown and has retired its note payable to Robert Eisiminger. 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.

Exhibit No.			Exhibit Title
99.1			Press Release dated November 13, 2025
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.

CASTELLUM, INC.

Date: November 13, 2025

By:

/s/ Glen R. Ives

Name:

Glen R. Ives

Title:

Chief Executive Officer (Principal Executive Officer)

FAQ

What did Castellum (CTM) announce?

It completed a $2 million paydown and retired its note payable to Robert Eisiminger.

When was the action announced by CTM?

On November 13, 2025.

Which form disclosed this update for CTM?

An 8-K under Item 8.01 (Other Events).

Is there a related press release?

Yes. It is filed as Exhibit 99.1 dated November 13, 2025.

What is CTM’s listed exchange and ticker?

Common stock trades on NYSE American under ticker CTM.