Castellum, Inc. (CTM) Insider Ownership

Historic Insider Ownership Trends

Castellum's three largest insider shareholders as of June 06, 2026 are Jay O Wright (Director, 9.10Mn shares), Mark C Fuller (Chief Executive Officer, 8.86Mn shares), Jay O Wright (General Counsel, Secretary, 7.13Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Jay O Wright - 0 9,097,993 02 Dec, 2022
Tammy L Martin General Counsel And Secretary 13,829 0 31 Mar, 2026
Charles Thomas Mcmillen - 231,015 0 27 Mar, 2026
David T Bell Chief Financial Officer 16,053 0 31 Mar, 2026
Mark C Fuller Chief Executive Officer 0 8,863,453 20 Oct, 2022
Emil Kaunitz - 1,999,856 0 21 Dec, 2022
Bernard S Champoux - 104,536 0 23 Mar, 2023
Glen R Ives President 199,616 0 27 Mar, 2026
Mark S Alarie - 112,920 0 23 Mar, 2023
Patricia Frost - 62,920 0 23 Mar, 2023
John Francis Campbell - 126,537 0 23 Mar, 2023
Andrew Merriman Chief Operating Officer 537,329 0 31 Mar, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
31 Mar, 2026 Andrew Merriman Common Stock A 1,329 $0.45 537,329 D A
31 Mar, 2026 David T Bell Common Stock A 1,329 $0.45 16,053 D A
31 Mar, 2026 Tammy L Martin Common Stock A 1,329 $0.45 13,829 D A
31 Mar, 2026 Andrew Merriman Common Stock A 1,329 $0.45 537,329 D A
27 Mar, 2026 Andrew Merriman Common Stock A 2,000 $0.64 536,000 D P
27 Mar, 2026 Andrew Merriman Common Stock A 2,000 $0.64 536,000 D P
27 Mar, 2026 Glen R Ives Common Stock A 2,000 $0.62 199,616 D P
25 Mar, 2026 Charles Thomas Mcmillen Common Stock D 30,000 $0.70 231,015 D S
27 Mar, 2026 Glen R Ives Common Stock A 2,000 $0.62 199,616 D P
26 Mar, 2026 Glen R Ives Common Stock A 10,000 $0.66 197,616 D P
26 Mar, 2026 Glen R Ives Common Stock A 10,000 $0.66 197,616 D P
18 Mar, 2026 Charles Thomas Mcmillen Common Stock D 55,000 $0.80 261,015 D S
18 Mar, 2026 Andrew Merriman Common Stock A 3,000 $0.80 534,000 D P
18 Mar, 2026 Andrew Merriman Common Stock A 3,000 $0.80 534,000 D P
19 Dec, 2025 Jay O Wright Common Stock D 30,000 $1.05 7,134,973 D S
19 Dec, 2025 Jay O Wright Common Stock D 30,000 $1.05 7,134,973 D S
15 Dec, 2025 Jay O Wright Common Stock D 6,000 $1.10 7,176,973 D S
15 Dec, 2025 Jay O Wright Common Stock D 6,000 $1.10 7,176,973 D S
16 Dec, 2025 Jay O Wright Common Stock D 12,000 $1.07 7,164,973 D S
16 Dec, 2025 Jay O Wright Common Stock D 12,000 $1.07 7,164,973 D S