Castellum (CTM): Insider sold ~$560K

~$560K

Approx. value · 500K sh @ $1.12

6.11M

Holds after · shares reported

Traded

Sep 3, 2025

Filed

Sep 3, 2025

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Aug 18, 2025InsiderDirector sold ~$243K of CTM shares in the open market
2. Aug 19, 2025InsiderDirector sold ~$132K of CTM shares in the open market
3. Aug 22, 2025InsiderDirector sold ~$47K of CTM shares in the open market
4. Aug 26, 2025InsiderDirector sold ~$42K of CTM shares in the open market
5. Aug 27, 2025InsiderDirector sold ~$42K of CTM shares in the open market
6. Aug 28, 2025InsiderDirector sold ~$25K of CTM shares in the open market
7. Sep 3, 2025 · this disclosureInsiderInsider sold ~$560K of CTM shares in the open market

What came next

1. Sep 5, 2025InsiderDirector sold ~$50K of CTM shares in the open market
2. Sep 8, 2025InsiderDirector sold ~$280K of CTM shares in the open market
3. Sep 9, 2025InsiderDirector sold ~$168K of CTM shares in the open market
4. Sep 10, 2025InsiderDirector sold ~$78K of CTM shares in the open market
5. Sep 11, 2025InsiderDirector sold ~$101K of CTM shares in the open market
6. Sep 12, 2025InsiderDirector sold ~$82K of CTM shares in the open market
7. Sep 15, 2025InsiderDirector sold ~$55K of CTM shares in the open market
8. Sep 16, 2025InsiderDirector sold ~$56K of CTM shares in the open market
9. Nov 7, 2025Company filing · Form 8-K · ResultsReported its results
10. Nov 11, 2025InsiderDirector sold ~$71K of CTM shares in the open market
11. Nov 13, 2025InsiderDirector sold ~$186K of CTM shares in the open market
12. Nov 14, 2025InsiderDirector sold ~$104K of CTM shares in the open market
13. Nov 17, 2025InsiderDirector sold ~$12K of CTM shares in the open market
14. Nov 28, 2025InsiderDirector sold ~$19K of CTM shares in the open market
15. Dec 1, 2025InsiderDirector sold ~$37K of CTM shares in the open market
16. Dec 8, 2025Company filing · Form 8-K · Executive change, Other newsChanged a top executive or board member, and reported other company news“Effective January 1, 2026 the Company has appointed Tammy L. Martin, the Company's Senior Counsel, as General Counsel and Secretary.”
17. Dec 10, 2025InsiderDirector sold ~$153K of CTM shares in the open market
18. Dec 11, 2025InsiderDirector sold ~$58K of CTM shares in the open market
19. Dec 12, 2025InsiderDirector sold ~$13K of CTM shares in the open market
20. Dec 15, 2025InsiderDirector sold ~$6.6K of CTM shares in the open market

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Castellum

For Castellum, OQRO holds 3 insider filings (SEC Form 4 or Form 144) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its CTM page.

Other recent filings by Fuller Mark C, Reporting person

• SEC Form 4 at Castellum (CTM)May 20, 2025
• SEC Form 4 at Castellum (CTM)Mar 6, 2025
• SEC Form 4 at Castellum (CTM)Mar 6, 2025

The full history of Fuller Mark C, Reporting person is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Castellum

• SEC Form 4Nov 10, 2026
• SEC Form 4Sep 9, 2026
• SEC Form 4Sep 9, 2026
• SEC Form 4Mar 27, 2026
• SEC Form 4Mar 27, 2026
• SEC Form 4Mar 27, 2026

Everything OQRO holds on this company is on its CTM page.