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Who

David T. Bell

Chief Financial Officer

Company insider

Files Form 4 as: Chief Financial Officer, Castellum.

In numbers

Trades disclosed
10
Buys
3
Sells
1
Bought
$153.0M
Sold
$153.0M
Companies
1
Companies where not an officer
0
First trade
17 Oct 2022
Last trade
1 Oct 2026
Last filed
1 Oct 2026

Companies traded

Where they are an officer
CTM CastellumOfficer, Other · Professional Services · last 1 Oct 20263 buys · 1 sell

Activity over time

1 Nov 2024 – 1 Oct 2026
01Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
1 Oct 2026filed 1 Oct 2026CTM CastellumProfessional ServicesSEC FORM 4 Bought$7471,396 at $0.5352filing
1 Jul 2026filed 2 Jul 2026CTM CastellumProfessional ServicesSEC FORM 4 Bought$7361,202 at $0.612filing
1 Jul 2026filed 2 Jul 2026CTM CastellumProfessional ServicesSEC FORM 4 Bought$7331,202 at $0.61filing
31 Mar 2026filed 31 Mar 2026CTM CastellumProfessional ServicesSEC FORM 4 Code A$6041,329 at $0.4544filing
31 Mar 2026filed 31 Mar 2026CTM CastellumProfessional ServicesSEC FORM 4 Code A$5981,329 at $0.45filing
11 Nov 2025filed 13 Nov 2025CTM Castellumoption or derivative · Professional ServicesSEC FORM 4 Code A—225,000 at $0.00filing
1 Apr 2023filed 3 Apr 2023CTM Castellumoption or derivative · Professional ServicesSEC FORM 4 Code A—360,000filing
28 Nov 2022filed 2 Dec 2022CTM CastellumProfessional ServicesSEC FORM 4 Bought$153.0M14,724 at $10,388.00filing
28 Nov 2022filed 29 Nov 2022CTM CastellumProfessional ServicesSEC FORM 4 Sold$153.0M14,724 at $10,388.00filing
17 Oct 2022filed 20 Oct 2022CTM Castellumoption or derivative · Professional ServicesSEC FORM 4 Code A—500,000filing

News

No headline names them, or the companies they trade most, lately.

Sectors

Industrials4

Buys in green, sells in red, by the company’s sector.

Related people

Andrew MerrimanChief Operating Officer · Chief Operating Officer at Castellum, filing Form 4 there in the last year
Tammy L. MartinGeneral Counsel and Secretary · General Counsel and Secretary at Castellum, filing Form 4 there in the last year
Glen R. IvesPresident · President at Castellum, filing Form 4 there in the last year
Charles Thomas McMillenDirector · Director at Castellum, filing Form 4 there in the last year