Castellum, Inc. (CTM) — Short Interest History
The most recent FINRA short interest report for CTM (settlement date April 30, 2026) shows 4,187,834 shares sold short , a change of -4.91% from the prior report .
Days to cover: 6.55.
Short interest history for CTM
| Settlement date | Short interest | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| Apr 30, 2026 | 4,187,834 | -4.91% | 639,634 | 6.55 |
| Apr 15, 2026 | 4,403,986 | -8.26% | 855,285 | 5.15 |
| Mar 31, 2026 | 4,800,688 | 4.44% | 1,658,343 | 2.89 |
| Mar 13, 2026 | 4,596,457 | 19.55% | 715,251 | 6.43 |
| Feb 27, 2026 | 3,844,921 | 1.41% | 909,191 | 4.23 |
| Feb 13, 2026 | 3,791,646 | 4.80% | 1,152,068 | 3.29 |
| Jan 30, 2026 | 3,617,871 | 44.47% | 1,479,973 | 2.44 |
| Jan 15, 2026 | 2,504,221 | 3.33% | 1,903,830 | 1.32 |
| Dec 31, 2025 | 2,423,431 | 4.82% | 2,325,046 | 1.04 |
| Dec 15, 2025 | 2,311,915 | -46.25% | 1,702,666 | 1.36 |
| Nov 28, 2025 | 4,301,349 | 34.20% | 1,528,438 | 2.81 |
| Nov 14, 2025 | 3,205,097 | -8.65% | 5,316,689 | 1.00 |
| Oct 31, 2025 | 3,508,498 | 13.52% | 9,687,957 | 1.00 |
| Oct 15, 2025 | 3,090,684 | -1.13% | 2,605,636 | 1.19 |
| Sep 30, 2025 | 3,125,885 | 83.23% | 2,415,573 | 1.29 |
| Sep 15, 2025 | 1,706,033 | 1.42% | 2,360,045 | 1.00 |
| Aug 29, 2025 | 1,682,098 | 9.20% | 2,120,096 | 1.00 |
| Aug 15, 2025 | 1,540,327 | 2.53% | 2,640,153 | 1.00 |
| Jul 31, 2025 | 1,502,293 | -32.69% | 3,432,711 | 1.00 |
| Jul 15, 2025 | 2,232,035 | 317.83% | 3,016,477 | 1.00 |
| Jun 30, 2025 | 534,201 | -23.63% | 1,676,616 | 1.00 |
| Jun 13, 2025 | 699,494 | 8.03% | 2,881,345 | 1.00 |
| May 30, 2025 | 647,512 | -55.62% | 1,469,309 | 1.00 |
| May 15, 2025 | 1,459,143 | -1.26% | 1,174,197 | 1.24 |
| Apr 30, 2025 | 1,477,762 | -28.83% | 737,967 | 2.00 |
Frequently asked questions
- What is short interest in CTM?
- Short interest is the total number of CTM shares currently sold short but not yet covered or closed out. FINRA publishes this data twice monthly.
- How is CTM short interest calculated?
- Short interest is aggregated from member firm reports to FINRA. Every U.S. broker-dealer must report aggregate short positions in each security as of the 15th and last trading day of each month.
- What does a high short interest mean?
- Higher short interest can indicate bearish sentiment, but it also raises the potential for a short squeeze if positive news forces short sellers to cover their positions simultaneously. Compare short interest to float (short percent of float) for context.