IMSR 424B3: Secondary offering
Terrestrial Energy Inc.
Filed with the SEC on · accession 0002019804-26-000027
IMSR filed a 424B3 (prospectus (offering)) with the SEC on Aug 14, 2026. The final terms of an offering of shares or bonds. The stock moved -2.8% by the first close after the filing.
Summary of the filing
Terrestrial Energy Inc. filed a prospectus supplement for a primary offering of up to 53,492,818 shares of common stock and a secondary offering of 13,723,445 shares of common stock, along with 1,267,599 warrants, updating the registration statement with its quarterly report.
Key details
How IMSR stock reacted
Close before
$6.06
Aug 13, 2026
First close after
-2.81%
$5.89
5 trading days
-13.04%
$5.27
Since filing
-57.84%
$2.56
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Click hereFrequently asked questions
What did IMSR file with the SEC on Aug 14, 2026?
IMSR filed a 424B3 (Secondary offering). Terrestrial Energy Inc. filed a prospectus supplement for a primary offering of up to 53,492,818 shares of common stock and a secondary offering of 13,723,445 shares of common stock, along with 1,267,599 warrants, updating the registration statement with its quarterly report.
What does a secondary offering mean for IMSR stock?
New shares dilute existing holders and are often sold at a discount to the market price.
How do I read a 424B3?
The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.
Why are SEC filings important?
Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B3 (prospectus (offering)): The final terms of an offering of shares or bonds.
How did IMSR stock react to this filing?
IMSR closed at $6.06 before the filing and $5.89 on Aug 14, 2026 (-2.81%). Five trading days later: $5.27 (-13.04%).
Other IMSR SEC filings
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