MARTIN TAMMY L bought CTM
October 1, 2026 · Form 4 insider transaction
MARTIN TAMMY L bought 1,396 shares of Castellum, Inc. at $0.54 per share, a transaction worth $747.14. The trade was recorded as open-market purchase and disclosed on an SEC Form 4, filed 0 days after the transaction.
Direction
Acquired (buy-side)
Shares
1,396
Price
$0.54
Total value
$747.14
InsiderMARTIN TAMMY L
Role—
CompanyCastellum, Inc. (CTM)
SecurityCommon Stock
Transaction codeP: Open-market purchase
Transaction dateOctober 1, 2026
Filing dateOctober 1, 2026
Shares owned after16,427
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Pursuant to the terms of the Castellum, Inc. 2025 Employee Stock Purchase Plan, the reporting person purchased 1,396 shares of common stock of the Registrant. The per share purchase price was calculated at a discount of fifteen percent to the closing price of the Registrant's common stock as quoted on the NYSE American LLC on September 30, 2026.