Castellum, Inc. (CTM) Ownership
CTM ownership summary
as of October 17, 2026- Institutions
- 8.4% of shares outstanding
- Insiders
- 12.09% of shares outstanding
- Shares outstanding
- 94.8M
- Float
- 83.3M shares available to trade
- Short interest
- 6.29% 5.4M shares short
- Days to cover
- 9.55 short interest down 23.4% vs prior month
- Institutions 8.35%
- Insiders 12.09%
- Other investors 79.56%
CTM insider transactions
latest 13| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-18 | Andrew Merriman | Buy | $0.80 | 3,000 | $2,400 |
| 2025-12-19 | Jay O Wright | Sell | $1.05 | 30,000 | $31,500 |
| 2025-12-12 | Jay O Wright | Sell | $1.16 | 11,000 | $12,760 |
| 2025-12-11 | Jay O Wright | Sell | $1.16 | 50,000 | $58,000 |
| 2025-12-10 | Jay O Wright | Sell | $1.21 | 127,000 | $153,670 |
| 2025-11-13 | Jay O Wright | Sell | $1.17 | 160,000 | $187,200 |
| 2025-11-11 | Jay O Wright | Sell | $1.18 | 60,000 | $70,800 |
| 2025-09-05 | Jay O Wright | Sell | $1.08 | 46,473 | $50,191 |
| 2025-09-03 | Mark C Fuller | Sell | $1.12 | 500,000 | $560,000 |
| 2025-08-19 | Jay O Wright | Sell | $1.05 | 126,000 | $132,300 |
| 2025-08-18 | Jay O Wright | Sell | $1.08 | 225,000 | $243,000 |
| 2025-05-19 | Jay O Wright | Sell | $1.07 | 259,400 | $277,558 |
| 2025-05-19 | Mark C Fuller | Sell | $1.05 | 500,000 | $525,000 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
CTM shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CTM
Institutional investors own 8.4% of Castellum's shares and insiders 12.09%. Short interest is 6.29% of the float, or 9.55 days of average trading volume. The share count rose 2,119.9% since 2015.
Related: CTM analyst forecast, CTM key metrics. See the CTM stock overview for the latest quote and news.
CTM ownership FAQ
What percentage of Castellum is owned by institutions?
Institutions hold 8.4% of Castellum's shares outstanding; insiders hold 12.09%.
What is Castellum's short interest?
5.4M shares of Castellum were sold short, 6.29% of the float; at the average daily volume it would take 9.55 days to cover.
Are insiders buying or selling Castellum?
Of the latest 13 reported insider transactions in Castellum (since May 19, 2025), 1 were purchases and 12 were sales.
How many shares of Castellum are outstanding?
Castellum has 94.8M shares outstanding, of which 83.3M are in the public float.