OBX 424B3: Shelf registration
Obsidian Therapeutics
Filed with the SEC on · accession 0001193125-26-458456
OBX filed a 424B3 (prospectus (offering)) with the SEC on Nov 12, 2026. Obsidian Therapeutics filed a prospectus supplement (424B3) to update its existing resale registration statement with its Q3 2026 quarterly report. The stock moved -3.1% by the first close after the filing.
Summary of the filing
Obsidian Therapeutics filed a prospectus supplement (424B3) to update its existing resale registration statement with its Q3 2026 quarterly report. The filing covers the potential resale of up to 29,164,045 shares of common stock by selling stockholders; the company will not receive any proceeds from such sales.
Key details
How OBX stock reacted
Close before
$12.88
Nov 11, 2026
First close after
-3.11%
$12.48
5 trading days
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Since filing
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Click hereFrequently asked questions
What did OBX file with the SEC on Nov 12, 2026?
OBX filed a 424B3 (Shelf registration). Obsidian Therapeutics filed a prospectus supplement (424B3) to update its existing resale registration statement with its Q3 2026 quarterly report. The filing covers the potential resale of up to 29,164,045 shares of common stock by selling stockholders; the company will not receive any proceeds from such sales.
What does a shelf registration mean for OBX 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 OBX stock react to this filing?
OBX closed at $12.88 before the filing and $12.48 on Nov 12, 2026 (-3.11%).
Other OBX SEC filings
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