Castellum Inc.

Last updated September 27, 2026

Organization details

Legal name
Castellum Inc.
Ownership
Public
Status
Active
Ticker symbol
CTM
Primary stock exchange
NYSE American

Identifiers

SEC CIK
0001877939

Board of directors

Board connections

1 of this board's directors also sit on 1 other board.

Network of Castellum Inc.'s board connections Nexstar Media Group Inc. Nexstar Media Group In... Charles Thomas McMillen Charles Thomas McMil... Castellum Inc.
Shared director Other board Same sector

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months
$45,471
10 purchases by 4 insiders
Sold, last 12 months
$769,300
14 sales by 2 insiders
Date Insider Transaction Shares Price Value
Sep 9, 2026 Merriman Andrew Officer (Chief Operating Officer) Open-market purchase +40,000 $0.62 $24,772
Sep 9, 2026 Merriman Andrew Officer (Chief Operating Officer) Open-market purchase +10,000 $0.62 $6,200
Jul 1, 2026 Bell David T Officer (Chief Financial Officer), Treasurer Open-market purchase +1,202 $0.61 $736
Jul 1, 2026 Ives Glen R Officer (President), Chief Executive Officer Open-market purchase +1,262 $0.61 $772
Jul 1, 2026 MARTIN TAMMY L Officer (General Counsel and Secretary) Open-market purchase +1,202 $0.61 $736
Jul 1, 2026 Merriman Andrew Officer (Chief Operating Officer) Open-market purchase +1,202 $0.61 $736
Mar 31, 2026 MARTIN TAMMY L Officer (General Counsel and Secretary) Grant or award +1,329 $0.45 $598
Mar 31, 2026 Bell David T Officer (Chief Financial Officer), Treasurer Grant or award +1,329 $0.45 $598
Mar 31, 2026 Merriman Andrew Officer (Chief Operating Officer) Grant or award +1,329 $0.45 $598
Mar 27, 2026 Ives Glen R Officer (President), Chief Executive Officer Open-market purchase +2,000 $0.62 $1,240
Mar 27, 2026 Merriman Andrew Officer (Chief Operating Officer) Open-market purchase +2,000 $0.64 $1,280
Mar 26, 2026 Ives Glen R Officer (President), Chief Executive Officer Open-market purchase +10,000 $0.66 $6,600
Mar 25, 2026 Charles Thomas McMillen Director Open-market sale −30,000 $0.70 $21,000
Mar 18, 2026 Charles Thomas McMillen Director Open-market sale −55,000 $0.80 $44,000
Mar 18, 2026 Merriman Andrew Officer (Chief Operating Officer) Open-market purchase +3,000 $0.80 $2,400

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