Castellum (CTM) CEO adds 2,000 shares in open-market buy

Rhea-AI Filing Summary

Castellum, Inc. President and Chief Executive Officer Glen R. Ives bought 2,000 shares of common stock in an open-market transaction at a price of $0.6157 per share. Following this purchase, he directly owns 199,616 shares of Castellum common stock.

Insider Trade Summary

Net Buyer: 2,000 shares ($1,231)

Net Buy 1 txn

Insider Ives Glen R

Role President

Bought 2,000 shs ($1K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	2,000	$0.6157	$1K

Holdings After Transaction: Common Stock — 199,616 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Ives Glen R

(Last) (First) (Middle)

1934 OLD GALLOWS ROAD

SUITE 350

(Street)

VIENNA VIRGINIA 22182

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Castellum, Inc. [ CTM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)	X	Other (specify below)
	President		Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/27/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/27/2026		P		2,000	A	$0.6157	199,616	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Glen R. Ives	03/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Castellum (CTM) report for Glen R. Ives?

Castellum reported that President and Chief Executive Officer Glen R. Ives completed an open-market purchase of common stock. He bought 2,000 Castellum shares on the reported date, reflecting a direct increase in his personal equity stake in the company.

How many Castellum (CTM) shares did Glen R. Ives buy and at what price?

Glen R. Ives bought 2,000 shares of Castellum common stock. The purchase was executed as an open-market transaction at a price of $0.6157 per share, according to the reported Form 4 insider trading disclosure.

What are Glen R. Ives’ total Castellum (CTM) holdings after this Form 4 trade?

After this transaction, Glen R. Ives directly owns 199,616 shares of Castellum common stock. This total reflects his position immediately following the 2,000-share open-market purchase disclosed in the Form 4 filing.

Was the Castellum (CTM) insider transaction a buy or a sell?

The transaction was a buy. The Form 4 classifies it as an open-market purchase, with transaction code “P” and a transaction direction identified as a buy, increasing Glen R. Ives’ directly held Castellum common stock.

Did the Castellum (CTM) Form 4 include any derivative transactions or option exercises?

No derivative transactions or option exercises were reported. The filing shows a single non-derivative transaction involving common stock, and the derivative transaction summary section is empty for this particular Form 4 disclosure.