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LYEL S-3: Shelf registration

Lyell Immunopharma

Filed with the SEC on · accession 0001193125-26-460585

LYEL filed a S-3 (shelf registration) with the SEC on Nov 13, 2026. Lyell Immunopharma filed a Form S-3 shelf registration statement to register 7,428,040 shares of common stock for resale by selling stockholders, which were originally issued in a private placement that closed on November 4, 2026. The stock moved -8.6% by the first close after the filing.

Summary of the filing

Lyell Immunopharma filed a Form S-3 shelf registration statement to register 7,428,040 shares of common stock for resale by selling stockholders, which were originally issued in a private placement that closed on November 4, 2026. The company will not receive any proceeds from the resale of these shares.

For details, click here →How to read a S-3 →

Key details

Number of shares registered for resaleshares 7.4M
Last reported sale price per share on November 12, 2026$16
RegistrantLyell Immunopharma, Inc.
Legal counselCooley LLP
President and chief executive officerLynn Seely, M.D.

How LYEL stock reacted

Close before

$15.64

Nov 12, 2026

First close after

-8.57%

$14.30

5 trading days

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Since filing

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Frequently asked questions

What did LYEL file with the SEC on Nov 13, 2026?

LYEL filed a S-3 (Shelf registration). Lyell Immunopharma filed a Form S-3 shelf registration statement to register 7,428,040 shares of common stock for resale by selling stockholders, which were originally issued in a private placement that closed on November 4, 2026. The company will not receive any proceeds from the resale of these shares.

What does a shelf registration mean for LYEL stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a S-3?

Lets the company sell shares or debt later, quickly — a sign more shares may come. Check the maximum amount and compare it with the company’s size. A later "424B" filing shows an actual sale under the shelf.

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 S-3 (shelf registration): Lets the company sell shares or debt later, quickly — a sign more shares may come.

How did LYEL stock react to this filing?

LYEL closed at $15.64 before the filing and $14.30 on Nov 13, 2026 (-8.57%).

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