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Company · Ownership research

Terrestrial Energy Inc. /DE/ IMSR

CIK 0002019804 · CUSIP 881454102

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 881454102 (IMSR), not CUSIP 881454902 (IMSR), CUSIP 881454952 (IMSR), CUSIP G43658106 (IMSR), and does not merge CUSIPs.
This page lists the top 20 of 82 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value
#ManagerValueManager weightChange vs priorSource

Showing 20 / 82 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions
82
Cancelled or null records excluded
Disclosed shares
21,415,986
Not deduplicated across managers
Disclosed value
$130.66M
Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Terrestrial Energy Inc. /DE/ · Q4 2025

Explore all 82 reporting institutions.

This page includes 20 of 82 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.