IMSR Short Interest (September 15, 2026 Update)
Short interest for IMSR was 5.8M as of September 15, 2026, -11.8% from the prior report.
This page tracks IMSR short interest over time, including historical values, changes between reports, and days to cover.
Terrestrial Energy Inc. Common | IMSR | Nasdaq | Latest report: September 15, 2026
At the latest settlement date of September 15, 2026, Terrestrial Energy Inc. Common (IMSR) showed reported short interest of 5,803,687 shares. That compared with 6,581,856 shares in the prior report, a change of -778.2K shares, or -11.8%. The latest reported days to cover was 4.45, based on average daily volume of 1.3M.
The historical data currently tracked for IMSR includes 22 reported entries from October 31, 2025 to September 15, 2026. Over that span, reported short interest has ranged from 1.2M to 6.6M shares.
Extreme edge-case readings may reflect unusually low reported average volume.
| Settlement Date | Short Interest | Prior Short Interest | Change Shares | Change % | Average Daily Volume | Days to Cover |
|---|---|---|---|---|---|---|
| September 15, 2026 | 5,803,687 | 6,581,856 | -778.2K | -11.8% | 1.3M | 4.45 |
| August 31, 2026 | 6,581,856 | 6,239,551 | 342.3K | +5.5% | 1.0M | 6.27 |
| August 14, 2026 | 6,239,551 | 5,824,372 | 415.2K | +7.1% | 1.3M | 4.65 |
| July 31, 2026 | 5,824,372 | 5,683,558 | 140.8K | +2.5% | 2.5M | 2.38 |
| July 15, 2026 | 5,683,558 | 5,978,828 | -295.3K | -4.9% | 1.8M | 3.1 |
| June 30, 2026 | 5,978,828 | 5,814,557 | 164.3K | +2.8% | 2.3M | 2.66 |
| June 15, 2026 | 5,814,557 | 4,779,175 | 1.0M | +21.7% | 3.3M | 1.76 |
| May 29, 2026 | 4,779,175 | 4,083,931 | 695.2K | +17.0% | 3.4M | 1.39 |
| May 15, 2026 | 4,083,931 | 3,443,602 | 640.3K | +18.6% | 3.4M | 1.19 |
| April 30, 2026 | 3,443,602 | 3,276,068 | 167.5K | +5.1% | 3.1M | 1.1 |
| April 15, 2026 | 3,276,068 | 3,255,139 | 20.9K | +0.6% | 1.5M | 2.16 |
| March 31, 2026 | 3,255,139 | 3,296,337 | -41.2K | -1.2% | 1.8M | 1.77 |
| March 13, 2026 | 3,296,337 | 3,686,500 | -390.2K | -10.6% | 1.2M | 2.81 |
| February 27, 2026 | 3,686,500 | 3,697,779 | -11.3K | -0.3% | 1.4M | 2.71 |
| February 13, 2026 | 3,697,779 | 3,089,469 | 608.3K | +19.7% | 2.0M | 1.83 |
| January 30, 2026 | 3,089,469 | 3,770,596 | -681.1K | -18.1% | 4.5M | 1 |
| January 15, 2026 | 3,770,596 | 3,024,640 | 746.0K | +24.7% | 5.8M | 1 |
| December 31, 2025 | 3,024,640 | 1,611,109 | 1.4M | +87.7% | 2.0M | 1.53 |
| December 15, 2025 | 1,611,109 | 1,224,234 | 386.9K | +31.6% | 1.5M | 1.08 |
| November 28, 2025 | 1,224,234 | 1,906,165 | -681.9K | -35.8% | 2.0M | 1 |
| November 14, 2025 | 1,906,165 | 2,558,429 | -652.3K | -25.5% | 1.8M | 1.07 |
| October 31, 2025 | 2,558,429 | 1,212,762 | 1.3M | +111.0% | 3.5M | 1 |