Castellum, Inc. (CTM) · Insider trading
What Castellum's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$48,641
4 insiders, 14 trades
Sold, 12 months
$769,300
2 insiders, 0% under a plan
Net, 12 months
−$720,659
bought less sold
Latest filing
2026-10-01
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Wright Jay ODirector, General Counsel, Secretary, Other | – | $3.10M | 29 | 2025-12-19 | 7,134,973 |
| Fuller Mark COther | – | $1.79M | 4 | 2025-09-03 | 6,113,659 |
| McMillen Charles ThomasDirector | – | $65,000 | 2 | 2026-03-25 | 231,015 |
| Merriman AndrewChief Operating Officer | $36,160 | – | 6 | 2026-10-01 | 589,927 |
| Ives Glen RDirector, President, Other | $9,520 | – | 4 | 2026-10-01 | 202,578 |
| Bell David TChief Financial Officer, Other | $1,480 | – | 2 | 2026-10-01 | 18,651 |
| Martin Tammy LGeneral Counsel and Secretary | $1,480 | – | 2 | 2026-10-01 | 16,427 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-01 | Ives Glen RDirector, President, Other | Buy | 1,700 | 0.54 | $910 | 202,578 | Form 4 |
| 2026-10-01 | Merriman AndrewChief Operating Officer | Buy | 1,396 | 0.54 | $747 | 589,927 | Form 4 |
| 2026-10-01 | Bell David TChief Financial Officer, Other | Buy | 1,396 | 0.54 | $747 | 18,651 | Form 4 |
| 2026-10-01 | Martin Tammy LGeneral Counsel and Secretary | Buy | 1,396 | 0.54 | $747 | 16,427 | Form 4 |
| 2026-09-09 | Merriman AndrewChief Operating Officer | Buy | 40,000 | 0.62 | $24,800 | 578,531 | Form 4 |
| 2026-09-09 | Merriman AndrewChief Operating Officer | Buy | 10,000 | 0.62 | $6,200 | 588,531 | Form 4 |
| 2026-07-01 | Ives Glen RPresident, Other | Buy | 1,262 | 0.61 | $770 | 200,878 | Form 4 |
| 2026-07-01 | Martin Tammy LGeneral Counsel and Secretary | Buy | 1,202 | 0.61 | $733 | 15,031 | Form 4 |
| 2026-07-01 | Bell David TChief Financial Officer, Other | Buy | 1,202 | 0.61 | $733 | 17,255 | Form 4 |
| 2026-07-01 | Merriman AndrewChief Operating Officer | Buy | 1,202 | 0.61 | $733 | 538,531 | Form 4 |
| 2026-03-27 | Ives Glen RPresident, Other | Buy | 2,000 | 0.62 | $1,240 | 199,616 | Form 4 |
| 2026-03-27 | Merriman AndrewChief Operating Officer | Buy | 2,000 | 0.64 | $1,280 | 536,000 | Form 4 |
| 2026-03-26 | Ives Glen RPresident, Other | Buy | 10,000 | 0.66 | $6,600 | 197,616 | Form 4 |
| 2026-03-25 | McMillen Charles ThomasDirector | Sale | 30,000 | 0.70 | $21,000 | 231,015 | Form 4 |
| 2026-03-18 | McMillen Charles ThomasDirector | Sale | 55,000 | 0.80 | $44,000 | 261,015 | Form 4 |
| 2026-03-18 | Merriman AndrewChief Operating Officer | Buy | 3,000 | 0.80 | $2,400 | 534,000 | Form 4 |
| 2025-12-19 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 30,000 | 1.05 | $31,500 | 7,134,973 | Form 4 |
| 2025-12-16 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 12,000 | 1.07 | $12,840 | 7,164,973 | Form 4 |
| 2025-12-15 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 6,000 | 1.10 | $6,600 | 7,176,973 | Form 4 |
| 2025-12-12 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 11,000 | 1.16 | $12,760 | 7,182,973 | Form 4 |
| 2025-12-11 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 50,000 | 1.16 | $58,000 | 7,193,973 | Form 4 |
| 2025-12-10 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 127,000 | 1.21 | $153,670 | 7,243,973 | Form 4 |
| 2025-12-01 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 35,000 | 1.05 | $36,750 | 7,370,973 | Form 4 |
| 2025-11-28 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 18,000 | 1.06 | $19,080 | 7,405,973 | Form 4 |
| 2025-11-17 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 10,000 | 1.16 | $11,600 | 7,423,973 | Form 4 |
| 2025-11-14 | Wright Jay ODirector, General Counsel, Secretary, Other | Sale | 90,000 | 1.15 | $103,500 | 7,433,973 | Form 4 |
| 2025-11-13 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 160,000 | 1.17 | $187,200 | 7,523,973 | Form 4 |
| 2025-11-11 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 60,000 | 1.18 | $70,800 | 7,683,973 | Form 4 |
| 2025-09-16 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 50,000 | 1.11 | $55,500 | 7,743,973 | Form 4 |
| 2025-09-15 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 50,000 | 1.10 | $55,000 | 7,793,973 | Form 4 |
| 2025-09-12 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 73,000 | 1.12 | $81,760 | 7,843,973 | Form 4 |
| 2025-09-11 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 90,000 | 1.12 | $100,800 | 7,916,973 | Form 4 |
| 2025-09-10 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 70,000 | 1.12 | $78,400 | 8,006,973 | Form 4 |
| 2025-09-09 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 150,000 | 1.12 | $168,000 | 8,076,973 | Form 4 |
| 2025-09-08 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 250,227 | 1.12 | $280,254 | 8,226,973 | Form 4 |
| 2025-09-05 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 46,473 | 1.08 | $50,191 | 8,477,200 | Form 4 |
| 2025-09-03 | Fuller Mark COther | Sale | 500,000 | 1.12 | $560,000 | 6,113,659 | Form 4 |
| 2025-08-28 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 24,000 | 1.05 | $25,200 | 8,523,673 | Form 4 |
| 2025-08-27 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 40,000 | 1.04 | $41,600 | 8,547,673 | Form 4 |
| 2025-08-26 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 40,000 | 1.04 | $41,600 | 8,587,673 | Form 4 |
9 more
| 2025-08-22 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 45,000 | 1.04 | $46,800 | 8,627,673 | Form 4 |
| 2025-08-19 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 126,000 | 1.05 | $132,300 | 8,672,673 | Form 4 |
| 2025-08-18 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 225,000 | 1.08 | $243,000 | 8,798,673 | Form 4 |
| 2025-05-19 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 259,400 | 1.07 | $277,558 | 9,023,673 | Form 4 |
| 2025-05-19 | Fuller Mark CDirector, 10% owner | Sale | 500,000 | 1.05 | $525,000 | 6,613,659 | Form 4 |
| 2025-03-06 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 135,000 | 1.34 | $180,900 | 9,523,673 | Form 4 |
| 2025-03-06 | Fuller Mark CDirector, 10% owner | Sale | 225,000 | 1.33 | $299,250 | 7,113,659 | Form 4 |
| 2025-03-05 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Sale | 365,000 | 1.47 | $536,550 | 9,658,673 | Form 4 |
| 2025-03-05 | Fuller Mark CDirector, 10% owner | Sale | 275,000 | 1.49 | $409,750 | 7,338,659 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
4 × other3 × grant or award2 × option exercise1 × gift
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-03-31 | Martin Tammy LGeneral Counsel and Secretary | Grant or award A | +1,329 | 0.45 | 13,829 | Form 4 |
| 2026-03-31 | Bell David TChief Financial Officer, Other | Grant or award A | +1,329 | 0.45 | 16,053 | Form 4 |
| 2026-03-31 | Merriman AndrewChief Operating Officer | Grant or award A | +1,329 | 0.45 | 537,329 | Form 4 |
| 2025-08-21 | McMillen Charles ThomasDirector | Option exercise M | +125,000 | 0.21 | 316,015 | Form 4 |
| 2025-05-19 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Other J | −240,600 | 1.04 | 9,283,073 | Form 4 |
| 2025-03-05 | Fuller Mark CDirector, 10% owner | Other J | −50,000 | – | 7,613,659 | Form 4 |
| 2025-01-31 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Other J | +101 | – | 10,023,673 | Form 5 |
| 2025-01-02 | McMillen Charles ThomasDirector | Option exercise M | +100,028 | 0.21 | 191,015 | Form 4 |
| 2024-12-31 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Gift G | −100,000 | – | 10,026,372 | Form 5 |
| 2024-12-31 | Wright Jay ODirector, General Counsel, Secretary, 10% owner, Other | Other J | −2,800 | – | 10,023,572 | Form 5 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.