Mark C. Fuller

Companies

• Castellum, Inc.Board member Oct 20, 2022 to now¹
• Castellum, Inc.President Mar 24, 2023 to Jun 14, 2023²
• Castellum, Inc.Chief executive officer Oct 12, 2022 to Jun 14, 2023³
• Castellum, Inc.Chair Oct 12, 2022 to Oct 12, 2022³

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• CCastellum, Inc. CTM14,977,112 shares⁴$8.5M at $0.57Sep 3, 2025

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 3, 2025Sold 500,000 shares at $1.12 of Castellum, Inc.⁴
• May 19, 2025Sold 500,000 shares at $1.05 of Castellum, Inc.⁵
• Mar 6, 2025Sold 225,000 shares at $1.33 of Castellum, Inc.⁶
• Mar 5, 2025Sold 275,000 shares at $1.49 of Castellum, Inc.⁶
• Mar 5, 2025Other 50,000 shares of Castellum, Inc.⁶
• Jun 13, 2023Bought 1,000 shares at $0.65 of Castellum, Inc.⁷
• Dec 2, 2022Bought 1,294 shares at $1,246.00 of Castellum, Inc.⁸
• Nov 30, 2022Bought 9,544 shares at $8,017.00 of Castellum, Inc.⁹
• Nov 30, 2022Sold 9,544 shares at $8,017.00 of Castellum, Inc.¹⁰
• Nov 28, 2022Bought 4,302 shares at $2,860.00 of Castellum, Inc.¹¹
• Nov 28, 2022Sold 4,302 shares at $2,860.00 of Castellum, Inc.¹²
• Oct 17, 2022Converted 7,522,500 shares of Castellum, Inc.¹³