Entity type
Company
Filer Snapshot
Terrestrial Energy Inc. /DE/
CIK 0002019804. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.
Total filings
161
Latest filing
19 May 2026
Industry
Fabricated Plate Work (Boiler Shops)
Filing-backed research brief
Start with the SEC data that changes for this CIK
Latest signal: SEC filing timeline only. Each card links back to the PortfolioSavvy page where the filing evidence is closest.
Latest 13F portfolio
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No parsed 13F portfolio row yet.
Browse latest 13FLargest parsed holding
—
Populates from the latest parsed 13F information table.
Open holding13D/G large stake
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No recent parsed 13D/G stake row for this CIK.
Browse 13D/GInsider / owner context
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No parsed Forms 3/4/5 owner position for this CIK.
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Source: SEC filing S-8
View Source Filing
S-8 filed on 19 May 2026 for CIK 0002019804.
- Public symbols
- IMSR, IMSRW on Nasdaq
- Business address
- 2730 W. Tyvola Road, Suite 100, Charlotte, NC, 28217
- State of incorporation
- DE
- Fiscal year end
- 31 December
- Former names
- HCM II Acquisition Corp. (to 29 Oct 2025)
Identity
SEC record
Filer intelligence
What SEC filings say about Terrestrial Energy Inc. /DE/
A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.
SEC source mix
Counts show available parsed rows, not one combined ownership total.
13F portfolio
No rows yet
Quarterly institutional portfolio holdings.
13D/G stakes
No rows yet
Beneficial ownership and large-stake disclosures.
Forms 3/4/5
No rows yet
Officer, director, and 10% owner holdings or transactions.
No parsed ownership summary yet
We still show the SEC filing timeline below. The intelligence summary will populate when parsed 13F, 13D/G, or Forms 3/4/5 data exists for this CIK.
Latest update
What changed recently for Terrestrial Energy Inc. /DE/
Latest financial period: Q1 2026. Open the source-backed page to inspect the fresh filing or facts context.
Update date
14 May 2026
Page type
Company facts
Latest period
Q1 2026
SEC-backed company facts were refreshed from filings filed on 14 May 2026.
Benchmark Context
Benchmark context for this company
Terrestrial Energy Inc. /DE/ has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.
Compared with
Start on the facts page for period-to-period context, then open a metric ranking when you want to compare the same reported fact across other SEC-reporting companies.
Why this is notable
Latest financial period: Q1 2026. That gives you a fresh baseline before you compare this company with peers.
- Latest company facts filing date: 14 May 2026.
- Peer comparisons stay conservative: same metric, compatible units, latest valid company row only.
- Open the facts page first if you want the cleanest path to verification.
Benchmark context is only shown where the app has enough comparable SEC-backed data to keep the interpretation honest.
SEC filing record
CIK 0002019804 filing coverage
Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.
SEC filings
161
First seen
26 Apr 2024
Latest filing
19 May 2026
Entity
Company
Observed form types
S-8
424B3
10-Q
8-K
ARS
DEFA14A
DEF 14A
4
D
POS EX
+24 more
Industry context: Fabricated Plate Work (Boiler Shops).
Latest Filings
Showing the latest 12 of 161 SEC filings for Terrestrial Energy Inc. /DE/.
S-8
File 333-296028
S-8
- Filing date
- 19 May 2026
- Reporting date
- Not listed
- SEC evidence
- Open document Open filing Open XBRL
- Next action
- Verify source filing
424B3
File 333-288735
424B3
- Filing date
- 14 May 2026
- Reporting date
- Not listed
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
424B3
File 333-291796
424B3
- Filing date
- 14 May 2026
- Reporting date
- Not listed
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
10-Q
File 001-42252
10-Q
- Filing date
- 14 May 2026
- Reporting date
- 31 Mar 2026
- SEC evidence
- Open document Open filing Open XBRL
- Next action
- Verify source filing
8-K
File 001-42252
8-K
- Filing date
- 14 May 2026
- Reporting date
- 14 May 2026
- SEC evidence
- Open document Open filing Open XBRL
- Next action
- Verify source filing
8-K
File 001-42252
8-K
- Filing date
- 08 May 2026
- Reporting date
- 05 May 2026
- SEC evidence
- Open document Open filing Open XBRL
- Next action
- Verify source filing
ARS
File 001-42252
ARS
- Filing date
- 29 Apr 2026
- Reporting date
- 31 Dec 2025
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
DEFA14A
File 001-42252
DEFA14A
- Filing date
- 29 Apr 2026
- Reporting date
- Not listed
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
DEF 14A
File 001-42252
DEF 14A
- Filing date
- 29 Apr 2026
- Reporting date
- 11 Jun 2026
- SEC evidence
- Open document Open filing Open XBRL
- Next action
- Verify source filing
8-K
File 001-42252
8-K
- Filing date
- 16 Apr 2026
- Reporting date
- 16 Apr 2026
- SEC evidence
- Open document Open filing Open XBRL
- Next action
- Verify source filing
4
4
- Filing date
- 14 Apr 2026
- Reporting date
- 12 Apr 2026
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
4
4
- Filing date
- 14 Apr 2026
- Reporting date
- 12 Apr 2026
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing