Terrestrial Energy
IMSR · NASDAQ
$2.80−$0.05 (−1.75%)TodayMarket closed ·
Prev close $2.85
Who owns IMSR
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 29.7% of IMSR’s shares.
- Sella (Roberto Marco)13.1%
- Irish (Simon)4.9%
- Vanguard Capital Management, LLC3.2%
- Exchange Traded Concepts, LLC2.0%
- Next 6 largest institutions6.4%
- All other shareholders70.3%
| Holder | Shares | % of shares |
|---|---|---|
| Sella (Roberto Marco) | 13.89M | 13.11% |
| Irish (Simon) | 5.17M | 4.88% |
| Vanguard Capital Management, LLC | 3.41M | 3.22% |
| Exchange Traded Concepts, LLC | 2.16M | 2.04% |
| UBS Financial Services, Inc. | 1.77M | 1.67% |
| HRT Financial LP | 1.13M | 1.06% |
| BlackRock Institutional Trust Company, N.A. | 1.06M | 1.00% |
| BNP Paribas Asset Management Europe SAS | 1.00M | 0.94% |
| J.P. Morgan Securities LLC | 966.80K | 0.91% |
| Merus Global Investments, LLC | 866.06K | 0.82% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Global X Uranium ETF | 3.92M | 3.70% |
| Vanguard Total Stock Market Index Fund | 2.70M | 2.55% |
| Range Nuclear Renaissance Index ETF | 2.07M | 1.95% |
| THEAM QUANT - Nuclear Opportunities | 1.00M | 0.94% |
| Vanguard Extended Market Index Fund | 614.16K | 0.58% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $112.28K (3 trades) of IMSR on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Pardee Charles G | Buy | 7.50K | $22.13K |
| Irish Simon | Buy | 16.90K | $50.82K |
| BUCKMAN FREDERICK W | Buy | 12.00K | $39.34K |
| Cowan Pamela Beth | Award | 299.40K | — |
| McCarthy Kathryn Ann | Award | 2.05K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 6.45M
- Days to cover
- 4.23
- % of shares outstanding
- 6.09%
- Average daily volume
- 1.52M
- Change since last report
- +11.1%
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