RGNX 424B5: Secondary offering
REGENXBIO Inc.
Filed with the SEC on · accession 0001193125-26-308027
RGNX filed a 424B5 (prospectus (offering)) with the SEC on Jul 17, 2026. REGENXBIO Inc. filed a prospectus supplement for a public offering of 10,003,889 shares of common stock and 1,111,111 pre-funded warrants, with an aggregate public offering price of approximately $100 million. The stock moved -11.7% by the first close after the filing.
Summary of the filing
REGENXBIO Inc. filed a prospectus supplement for a public offering of 10,003,889 shares of common stock and 1,111,111 pre-funded warrants, with an aggregate public offering price of approximately $100 million. The offering is underwritten by Morgan Stanley, J.P. Morgan, Leerink Partners, and Mizuho.
Key details
How RGNX stock reacted
Close before
$11.20
Jul 16, 2026
First close after
-11.70%
$9.89
5 trading days
-8.48%
$10.25
Since filing
-34.11%
$7.38
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Click hereFrequently asked questions
What did RGNX file with the SEC on Jul 17, 2026?
RGNX filed a 424B5 (Secondary offering). REGENXBIO Inc. filed a prospectus supplement for a public offering of 10,003,889 shares of common stock and 1,111,111 pre-funded warrants, with an aggregate public offering price of approximately $100 million. The offering is underwritten by Morgan Stanley, J.P. Morgan, Leerink Partners, and Mizuho.
What does a secondary offering mean for RGNX stock?
New shares dilute existing holders and are often sold at a discount to the market price.
How do I read a 424B5?
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 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.
How did RGNX stock react to this filing?
RGNX closed at $11.20 before the filing and $9.89 on Jul 17, 2026 (-11.70%). Five trading days later: $10.25 (-8.48%).
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