Common Stock, par value $0.0001 per share
- Symbol
- IMSR
- Exchange
- NASDAQ
- Classification
- COMMON
- Status
- Current
Current Report · Items 5.02, 7.01, 9.01 · 8-K
Terrestrial Energy Inc.
IMSRNASDAQEQUITYCurrent
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · Regulation FD Disclosure
Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. (d) On July 22, 2026, the Board of Directors (the "Board") of Terrestrial Energy Inc. (the “Company”) appointed Kathryn McCarthy to serve as a director of the Company, effective on July 22, 2026. Ms.…
Company context
Terrestrial Energy is a developer of Generation IV nuclear plants that use its proprietary Integral Molten Salt Reactor (IMSR). The IMSR captures the transformative operating benefits of molten salt reactor technology in a plant design that represents true innovation in capital efficiency, cost reduction, versatility and functionality of nuclear energy supply. IMSR plants are designed to be small and modular for distributed supply of low-cost, reliable, dispatchable, clean, high-temperature industrial heat and electricity, and to be customized for a dual-use energy role relevant to many industrial applications, such as petrochemical and chemical synthesis, and data center operation. In so doing, IMSR plants extend the application of nuclear energy far beyond electric power markets. Their deployment will support the rapid growth of clean firm heat and power, delivering energy self-reliance, grid reliability and economic growth. Terrestrial Energy uses an innovative plant design together with proven and demonstrated molten salt reactor technology and readily-available and inexpensive standard-assay low-enriched uranium in its fuel for a nuclear plant with a unique set of operating characteristics and compelling transformative commercial potential. Terrestrial Energy is engaged with regulators, suppliers, industrial partners and energy end-users to build, license and commission the first IMSR plants in the early 2030s.
Current securities
Registered securities in this filing
TERRESTRIAL ENERGY INC. · 8-K · Filed 2026-07-28
Redeemable Warrants, each whole warrant exercisable for one CommonStock at a price of $11.50 per share
- Symbol
- IMSRW
- Exchange
- NASDAQ
- Classification
- WARRANT
- Status
- Current
Disclosure sections
Item 5.02Item 5.02 - Departure/Election of Directors
Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
(d) On July 22, 2026, the Board of Directors (the "Board") of Terrestrial Energy Inc. (the “Company”) appointed Kathryn McCarthy to serve as a director of the Company, effective on July 22, 2026.
Ms. McCarthy has served as Senior Advisor at Oak Ridge National Laboratory since 2025, supporting strategic decisions in the US ITER Project and fusion and fission research and development. Previously, she served as Director of the US ITER Project Office at Oak Ridge National Laboratory from 2020 to 2025, where she provided strategic leadership for the US participation in the international ITER fusion energy project. Prior to that, she served as Vice President of Research and Development at Canadian Nuclear Laboratories from 2017 to 2020, and held senior leadership positions at Idaho National Laboratory from 2003 to 2017, including Deputy Associate Laboratory Director for Nuclear Science and Technology and Director of Nuclear Science and Engineering.
Ms. McCarthy will receive compensation consistent pursuant to the Company’s non-employee director compensation policy, as described in the Company’s definitive proxy statement, filed with the Securities and Exchange Commission on April 29, 2026, in connection with the Company’s 2026 Annual Meeting of Stockholders. Ms. McCarthy has entered into the Company’s standard form of indemnification agreement, which is filed as Exhibit 10.11 to the Company’s Current Report on Form 8-K filed on November 3, 2025.
There are no arrangements or understandings between Ms. McCarthy and any other person pursuant to which she was selected as a director. There are no transactions involving the Company and Ms. McCarthy that would be required to be reported under Item 404(a) of Regulation S-K.
Item 7.01Item 7.01 - Regulation FD Disclosure
Item 7.01 Regulation FD Disclosure
On July 28, 2026, the Company issued a press release to announce Ms. McCarthy’s appointment to the Board. A copy of the press release is also furnished as Exhibit 99.1 to this Current Report on Form 8-K.
The information set forth under this Item 7.01, including Exhibit 99.1, is intended to be furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.
Filed exhibits (1)
EX-99.1 2 tmb-20260723xex99d1.htm EX-99.1 Exhibit 99.1 Terrestrial Energy Board Adds Industry Veteran Kathryn McCarthy; Announces Second Quarter 2026 Earnings Release and Conference Call Date CHARLOTTE, N.C., July 28, 2026 (BUSINESSWIRE) -- Terrestrial Energy Inc. (NASDAQ: IMSR), a developer of small modular nuclear power plants using its Generation IV Integral Molten Salt Reactor (IMSR), today announced that industry veteran Kathryn McCarthy has been appointed to the Board of Directors. “Kathy has decades of leadership in major nuclear science and technology projects at the nation's leading national laboratories. Her experience with the delivery of large-scale projects brings further expertise to the Company as it moves ahead with project execution and IMSR plant commercial deployment,” said Simon Irish, Terrestrial Energy CEO. “We welcome Kathy to the Company and look forward to her playing an important role.” “Terrestrial Energy is at the forefront of the nuclear sector at a time when nuclear plant innovations and developments can deliver exceptional improvements in the performance and application of nuclear energy supply. I look forward to drawing on my many years in nu…
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