ALT SCHEDULE 13G: SEC filing

State Street Corporation

Filed with the SEC on Nov 10, 2026 · accession 0000093751-26-000611

ALT filed a SCHEDULE 13G (schedule 13g) with the SEC on Nov 10, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -8.5% by the first close after the filing.

Summary of the filing

State Street Corporation filed a Schedule 13G disclosing a passive 4.3% ownership stake in Altimmune, Inc., holding approximately 8,356,408 shares as of September 30, 2026.

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Key details

Shares beneficially owned by State Street Corporation$8.4M

Shares with sole voting power$8.2M

Filer / passive institutional investor holding 4.3% of altimmuneState Street Corporation

Issuer / subject companyAltimmune, Inc.

Senior vice president, state street corporationAlok Maheshwary

How ALT stock reacted

Close before

$2.12

Nov 9, 2026

First close after

-8.49%

$1.94

5 trading days

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Since filing

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Frequently asked questions

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

ALT filed a SCHEDULE 13G (SEC filing). State Street Corporation filed a Schedule 13G disclosing a passive 4.3% ownership stake in Altimmune, Inc., holding approximately 8,356,408 shares as of September 30, 2026.

How do I read a SCHEDULE 13G?

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 SCHEDULE 13G (schedule 13g): A report the company filed with the SEC (the US market regulator).

How did ALT stock react to this filing?

ALT closed at $2.12 before the filing and $1.94 on Nov 10, 2026 (-8.49%).

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