Castellum (CTM)Chief Operating Officer bought ~$1.3K

~$1.3K

Approx. value · 2,000 sh @ $0.6426

536K

Holds after · shares reported

Traded

Mar 27, 2026

Filed

Mar 27, 2026

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. Mar 4, 2026Company filing · Form 8-K · ResultsReported its results
2. Mar 18, 2026Insider · 2 peopleInsiders: 1 purchase (~$2K), 1 sale (~$44K)
3. Mar 25, 2026InsiderDirector sold ~$21K of CTM shares in the open market
4. Mar 26, 2026Insider · Their first buy on recordOfficer purchased ~$6.6K of CTM shares in the open market
5. Mar 27, 2026 · this disclosureInsiderOfficer purchased ~$1.3K of CTM shares in the open market

What came next

1. Mar 27, 2026InsiderOfficer purchased ~$1.2K of CTM shares in the open market
2. May 8, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
3. Jul 1, 2026Company filing · Form 8-K · Material agreement, Executive changeChanged a top executive or board member, and signed an important agreement“The disclosure in Item 1.01 of this Current Report on Form 8-K is incorporated hereby by reference into this”

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 2 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 Andrew Merriman, Chief Operating Officer

• SEC Form 4 at Castellum (CTM)Sep 9, 2026
• SEC Form 4 at Castellum (CTM)Sep 9, 2026
• SEC Form 4 at Castellum (CTM)Mar 18, 2026

The full history of Andrew Merriman, Chief Operating Officer 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 4Sep 9, 2026
• SEC Form 4Sep 9, 2026
• SEC Form 4Mar 27, 2026
• SEC Form 4Mar 27, 2026
• SEC Form 4Mar 26, 2026
• SEC Form 4Mar 20, 2026

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