RLYB EFFECT: Shelf registration
Rallybio Corp
Filed with the SEC on · accession 9999999995-26-003252
RLYB filed a EFFECT (effect) with the SEC on Oct 15, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -0.8% by the first close after the filing.
Summary of the filing
Rallybio Corp filed an EFFECT notice indicating the SEC declared effective a registration statement, allowing the company to proceed with a registered securities offering.
Key details
How RLYB stock reacted
Close before
$16.91
Oct 14, 2026
First close after
-0.77%
$16.77
5 trading days
-4.05%
$16.22
Since filing
-6.83%
$15.75
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Click hereFrequently asked questions
What did RLYB file with the SEC on Oct 15, 2026?
RLYB filed a EFFECT (Shelf registration). Rallybio Corp filed an EFFECT notice indicating the SEC declared effective a registration statement, allowing the company to proceed with a registered securities offering.
What does a shelf registration mean for RLYB stock?
New shares dilute existing holders and are often sold at a discount to the market price.
How do I read a EFFECT?
A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.
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 EFFECT (effect): A report the company filed with the SEC (the US market regulator).
How did RLYB stock react to this filing?
RLYB closed at $16.91 before the filing and $16.77 on Oct 15, 2026 (-0.77%). Five trading days later: $16.22 (-4.05%).
Other RLYB SEC filings
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