Andrew Merriman

Insider · Chief Operating Officer · CTM

Andrew Merriman files insider transactions with the SEC as a chief operating officer of Castellum. We hold 4 disclosed purchases and sales filed since 24 January 2025, 2 of them in the last 90 days.

Files forCTM
Disclosed buys and sells4 in all, 2 in the last 90 days
Last disclosure9 September 2026

Positions held

1 post we hold — a term names its own dates; a run of filings only says when they filed

Filed 22 January 2025 — 9 September 2026Chief Operating Officer · Castellum 11 Form 4 lines · source: SEC Form 4

Every transaction

11 transactions from SEC Form 4 — one row each, sort any column, open a row for the filing

Sort byOpen-market trades only11 of 11 shown


9 Sep 2026	9 Sep 2026SEC Form 4	0 d	bought on the open market	Castellum	40,000 shares	up +0.0%	up +0.0%
9 Sep 2026	9 Sep 2026SEC Form 4	0 d	bought on the open market	Castellum	10,000 shares	up +0.0%	up +0.0%
1 Jul 2026	2 Jul 2026SEC Form 4	1 d	bought on the open market	Castellum	1,202 shares	down −17.8%	down −13.7%
31 Mar 2026	31 Mar 2026SEC Form 4	0 d	was grantednot a trade	Castellum	1,329 shares	up +1.7%	up +1.7%
31 Mar 2026	31 Mar 2026SEC Form 4	0 d	was grantednot a trade	Castellum	1,329 shares	up +1.7%	up +1.7%
27 Mar 2026	27 Mar 2026SEC Form 4	0 d	bought on the open market	Castellum	2,000 shares	down −3.2%	down −3.2%
27 Mar 2026	27 Mar 2026SEC Form 4	0 d	bought on the open market	Castellum	2,000 shares	down −3.2%	down −3.2%
18 Mar 2026	18 Mar 2026SEC Form 4	0 d	bought on the open market	Castellum	3,000 shares	down −24.1%	down −24.1%
18 Mar 2026	18 Mar 2026SEC Form 4	0 d	bought on the open market	Castellum	3,000 shares	down −24.1%	down −24.1%
11 Nov 2025	13 Nov 2025SEC Form 4	2 d	was grantednot a trade	Castellumderivative	275,000 shares	down −49.6%	down −49.2%
22 Jan 2025	24 Jan 2025SEC Form 4	2 d	was grantednot a trade	Castellumderivative	325,000 shares	down −43.9%	down −33.7%

Both percentages are the stock’s move, not Andrew Merriman’s return: a disclosure gives a band, never an amount, so nobody can say how much was bought or what it made. They run to the last close we hold — 9 Sep 2026, except where a name has since delisted, when the row names its own last session. We publish no close, no volume and no dollar figure behind them. 11 of the 11 rows shown carry a percentage; the rest are dashes with the reason on the row.

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.

Some filings reach us as photographs of paper rather than as a form we can read as text. Those are shown here only once they have been read and checked, so this page can hold fewer lines than the filings behind it contain. The link on every row opens the original document, which is always the full record.