Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Terrestrial Energy Inc. /DE/ in our court records and SEC 8-K records (as of 2026-10-18).
- Leadership changes: the latest reported is Shawn Matthews (Form 8-K filed 2026-07-31). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Roberto Marco Sella (filed 2026-01-22).
Who is behind it
Terrestrial Energy Inc. /DE/: incorporated in Delaware; business address in Charlotte, North Carolina; industry Fabricated Plate Work (Boiler Shops) (Form D, 2026-07-31).
Officers and directors, each with the role and the filing that names them:
- Simon Irish: Executive Officer (Form D, 2026-03-31)
- David LeBlanc: Executive Officer, Director (Form D, 2026-03-31)
- Brian Thrasher: Executive Officer (Form D, 2026-03-31)
- Hugh MacDiarmid: Director (Form D, 2026-03-31)
- David Hill: Director (Form D, 2026-03-31)
- Frederick Buckman. Sr.: Director (Form D, 2026-03-31)
- William Johnson: Director (Form D, 2026-03-31)
- Charles Pardee: Director (Form D, 2026-03-31)
- Shawn Matthews: Director (Form D, 2026-03-31)
- Robert Jones: Director (Form D, 2026-03-31)
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-02-17 | Kenneth Griffin | 2.2% |
| Schedule 13G, 2026-01-22 | Roberto Marco Sella | 14.34% |
| Schedule 13G/A, 2025-11-12 | Magnetar Financial LLC | 0.62% |
| Schedule 13G/A, 2025-11-12 | Linden Capital L.P. | 0.9% |
| Schedule 13D, 2025-11-04 | Simon Irish | 12.8% |
| Schedule 13D, 2025-11-04 | David Leblanc | 9.7% |
| Schedule 13G, 2025-09-30 | Kenneth Griffin | 5.4% |
| Schedule 13G/A, 2025-08-14 | First Trust Capital Management L.P. | 4.66% |
| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-07-31 | Shawn Matthews | departed | 2026-07-27 | |
| Form 8-K, 2026-07-28 | Kathryn McCarthy | Director | appointed | 2026-07-22 |
| Form 8-K, 2026-05-08 | David Hill | departed | 2026-07-01 |
Money raised
| Filed | Sold | Offered |
|---|---|---|
| Form D, 2026-03-31 | $85K | $85K |
Latest IPO step: Terrestrial Energy Inc. /DE/ amended its IPO registration (S-1/A, 2025-12-22).
IPO filings: S-1/A, 2025-12-22, S-1, 2025-11-26, 424B4, 2024-08-16, S-1/A, 2024-08-02, S-1/A, 2024-07-19.
Acquisitions reported on Form 8-K, Item 2.01: completed an acquisition (2025-11-03).
Related pages
Leadership changes5%+ holdersIPO filings
Filings, cases and notices link to their records. A not-found line names the records searched; it is not proof of absence.
Not for employment, credit, insurance or tenancy decisions.
Cite this page
Permanent URL:
https://mentionfox.com/who-owns/terrestrial-energyLast updated 2026-10-18
Primary record: Schedule 13G, 2026-01-22 · Form D, 2026-03-31 · Form 8-K, 2026-07-31 · Form 8-K, 2026-07-28
Who owns Terrestrial Energy Inc. /DE/? Owners, funding and legal record. MentionFox, 2026-10-18. https://mentionfox.com/who-owns/terrestrial-energy