SPIR 424B3: Shelf registration

Spire Global

Filed with the SEC on Nov 10, 2026 · accession 0001628280-26-072844

SPIR filed a 424B3 (prospectus (offering)) with the SEC on Nov 10, 2026. Spire Global filed a prospectus supplement (424B3) to update its existing S-1 shelf registration with its quarterly report on Form 10-Q for the period ended September 30, 2026. The stock moved -1.2% by the first close after the filing.

Summary of the filing

Spire Global filed a prospectus supplement (424B3) to update its existing S-1 shelf registration with its quarterly report on Form 10-Q for the period ended September 30, 2026. The supplement covers 3,162,500 shares of Class A common stock related to a prior PIPE transaction.

For details, click here →How to read a 424B3 →

Key details

Shares of Class A common stock covered by prospectus supplement$3.2M

Last quoted sale price per share on November 9, 2026$9

IssuerSpire Global, Inc.

How SPIR stock reacted

Close before

$9.46

Nov 9, 2026

First close after

-1.16%

$9.35

5 trading days

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Since filing

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Frequently asked questions

What did SPIR file with the SEC on Nov 10, 2026?

SPIR filed a 424B3 (Shelf registration). Spire Global filed a prospectus supplement (424B3) to update its existing S-1 shelf registration with its quarterly report on Form 10-Q for the period ended September 30, 2026. The supplement covers 3,162,500 shares of Class A common stock related to a prior PIPE transaction.

What does a shelf registration mean for SPIR 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 SPIR stock react to this filing?

SPIR closed at $9.46 before the filing and $9.35 on Nov 10, 2026 (-1.16%).

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