Castellum, Inc. (CTM) has 12 known insider and institutional holders on record. The largest holder is WRIGHT JAY O with 7,134,973 shares. Other notable holders include Fuller Mark C and Kaunitz Emil.
Over the last 12 months, insiders have made 49 transactions in CTM stock — 15 buys (valued at $1.71M) and 31 sells (valued at $3.53M). Insider selling has exceeded buying during this period.
CTM Insider Ownership
Top Holder
WRIGHT JAY O
7,134,973 shares
Buys (12 mo)
15
$1.71M value
Sells (12 mo)
31
$3.53M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
7,134,973 |
2025-12-22 |
|
| 2 |
Fuller Mark C |
Other: Former Officer and Affiliate |
6,113,659 |
2025-09-03 |
|
| 3 |
Kaunitz Emil |
Director |
1,999,856 |
2022-12-21 |
|
| 4 |
Merriman Andrew |
Chief Operating Officer |
537,329 |
2026-03-31 |
|
| 5 |
Mcmillen Charles Thomas |
Director |
231,015 |
2026-03-27 |
|
| 6 |
Ives Glen R |
Officer, Other: President |
199,616 |
2026-03-27 |
|
| 7 |
Champoux Bernard S |
Director |
100,000 |
2025-11-13 |
|
| 8 |
Alarie Mark S |
Director |
100,000 |
2025-11-13 |
|
| 9 |
Campbell John Francis |
Director |
100,000 |
2025-11-13 |
|
| 10 |
Bell David T |
Officer, Other: Chief Financial Officer |
16,053 |
2026-03-31 |
|
| 11 |
Martin Tammy L |
General Counsel and Secretary |
13,829 |
2026-03-31 |
|
| 12 |
Frost Patricia |
Director |
12,500 |
2023-03-23 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-31 |
Merriman Andrew |
Chief Operating Officer |
RSU Award |
1,329 |
$0.45 |
$603.90 |
| 2026-03-31 |
Bell David T |
Officer, Other: Chief Financial Officer |
RSU Award |
1,329 |
$0.45 |
$603.90 |
| 2026-03-31 |
Martin Tammy L |
General Counsel and Secretary |
RSU Award |
1,329 |
$0.45 |
$603.90 |
| 2026-03-27 |
Merriman Andrew |
Chief Operating Officer |
Informative Buy |
2,000 |
$0.64 |
$1.29K |
| 2026-03-27 |
Ives Glen R |
Officer, Other: President |
Informative Buy |
2,000 |
$0.62 |
$1.23K |
| 2026-03-25 |
Mcmillen Charles Thomas |
Director |
Informative Sell |
30,000 |
$0.70 |
$21.13K |
| 2026-03-26 |
Ives Glen R |
Officer, Other: President |
Informative Buy |
10,000 |
$0.66 |
$6.65K |
| 2026-03-18 |
Mcmillen Charles Thomas |
Director |
Informative Sell |
55,000 |
$0.80 |
$44.1K |
| 2026-03-18 |
Merriman Andrew |
Chief Operating Officer |
Informative Buy |
3,000 |
$0.80 |
$2.39K |
| 2026-01-01 |
Martin Tammy L |
General Counsel and Secretary |
Unknown |
100,000 |
$1.07 |
$107K |
| 2023-01-01 |
Martin Tammy L |
General Counsel and Secretary |
Unknown |
12,500 |
$2.00 |
$25K |
| 2025-12-19 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
30,000 |
$1.05 |
$31.5K |
| 2025-12-16 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
12,000 |
$1.07 |
$12.88K |
| 2025-12-15 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
6,000 |
$1.10 |
$6.62K |
| 2025-12-12 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
11,000 |
$1.16 |
$12.75K |
| 2025-12-11 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
50,000 |
$1.16 |
$58.05K |
| 2025-12-10 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
127,000 |
$1.21 |
$153.29K |
| 2025-12-01 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
35,000 |
$1.05 |
$36.75K |
| 2025-11-28 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
18,000 |
$1.06 |
$18.99K |
| 2025-11-17 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
10,000 |
$1.16 |
$11.56K |
| 2025-11-14 |
Wright Jay O |
Officer, Other: General Counsel, Secretary |
Informative Sell |
90,000 |
$1.15 |
$103.5K |
| 2025-11-11 |
Merriman Andrew |
Chief Operating Officer |
RSU Award |
275,000 |
$1.19 |
$327.25K |
| 2025-11-11 |
Campbell John Francis |
Director |
RSU Award |
100,000 |
$1.19 |
$119K |
| 2025-11-11 |
Alarie Mark S |
Director |
RSU Award |
100,000 |
$1.19 |
$119K |
| 2025-11-11 |
Ives Glen R |
Officer, Other: President |
RSU Award |
500,000 |
$1.19 |
$595K |
