IMSR SEC Filings: 8-K, 10-Q, S-3 & 424B

Financials

TYPE

HEADLINE

FILED AT

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Aug 11, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

May 14, 2026

10-K

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]

Mar 30, 2026

10-Q/A

Form 10-Q/A - Quarterly report [Sections 13 or 15(d)]: [Amend]

Nov 20, 2025

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Nov 14, 2025

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Aug 12, 2025

News

TYPE

HEADLINE

FILED AT

8-K

Terrestrial Energy Announces $25 Million Share Repurchase Program

Oct 27, 2026

8-K

Terrestrial Energy Reports Q2 2026 Results, NRC Licensing Progress, and Updated Unit Economics

Aug 11, 2026

8-K

Terrestrial Energy Inc. Announces Resignation of Board Member Shawn Matthews

Jul 31, 2026

8-K

Terrestrial Energy Appoints Kathryn McCarthy to Board of Directors and Announces Q2 2026 Earnings Date

Jul 28, 2026

8-K

Terrestrial Energy Overview: Delivering Carbon-Free Thermal and Electrical Energy

Jul 21, 2026

8-K

Terrestrial Energy Inc. Announces Departure of General Counsel

Jul 17, 2026

Prospectus

TYPE

HEADLINE

FILED AT

424B3

Form 424B3 - Prospectus [Rule 424(b)(3)]

Aug 14, 2026

424B3

OFFERING - OTHER | Shares: 151,970,541

May 14, 2026

424B3

PENDING FIXED PRICE OFFERING | Shares: 37,568,718

May 14, 2026

424B3

UPDATE TO PRIOR PROSPECTUS | Shares: 151,970,541

Mar 30, 2026

424B3

PENDING FIXED PRICE OFFERING | Shares: 37,568,718

Mar 30, 2026

424B3

UPDATED | SHARE RESALE REGISTRATION | Shares amount: 151,970,541 | Warrants amount: 18,350,000

Jan 5, 2026

Registrations

TYPE

HEADLINE

FILED AT

POS AM

SHARE RESALE REGISTRATION | Shares: 14,887,245

Nov 3, 2026

S-3

SHARE RESALE REGISTRATION

Nov 3, 2026

S-3

November 2026 SHELF

Nov 3, 2026

POS AM

OFFERING

Jun 5, 2026

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

May 19, 2026

Form D - Notice of Exempt Offering of Securities - Item 06b

Mar 31, 2026

Proxies

TYPE

HEADLINE

FILED AT

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Apr 29, 2026

DEF 14A

Form DEF 14A - Other definitive proxy statements

Apr 29, 2026

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Mar 26, 2025

Ownerships

TYPE

HEADLINE

FILED AT

S-3

Form S-3 - Registration statement under Securities Act of 1933

Nov 3, 2026

S-3

Form S-3 - Registration statement under Securities Act of 1933

Nov 3, 2026

Irish Simon (Reporting)

Oct 30, 2026

Irish Simon (Reporting)

Oct 26, 2026

Williams David Woodward (Reporting)

Oct 21, 2026

Williams David Woodward (Reporting)

Oct 21, 2026

Other

TYPE

HEADLINE

FILED AT

EFFECT

Form EFFECT - Notice of Effectiveness

Jun 12, 2026

EFFECT

Form EFFECT - Notice of Effectiveness

Dec 29, 2025

CORRESP

Form CORRESP - Correspondence

Dec 23, 2025

EFFECT

Form EFFECT - Notice of Effectiveness

Sep 29, 2025

CORRESP

Form CORRESP - Correspondence

Sep 24, 2025

CORRESP

Form CORRESP - Correspondence

Sep 16, 2025

Terrestrial Energy Inc. IMSR · SEC Filings