Terrestrial Energy is trading 8.2% higher at $3.55 before the October 12, 2026 market open, with no confirmed catalyst identified. - The October 8 NRC topical-report submission and October 9 coverage of the company’s fuel strategy are recent background; available reports do not link either to the pre-market gain. - Broader U.S. futures are modestly higher, but that does not establish a market-wide explanation for the sharp move.