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HOWL EFFECT: SEC filing

Filed with the SEC on · accession 9999999995-26-003522

HOWL filed a EFFECT (effect) with the SEC on Nov 12, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -0.9% by the first close after the filing.

Summary of the filing

The SEC declared effective Werewolf Therapeutics' Form S-4 registration statement related to a merger or acquisition transaction.

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Key details

FilerWerewolf Therapeutics, Inc.

How HOWL stock reacted

Close before

$0.99

Nov 11, 2026

First close after

-0.90%

$0.98

5 trading days

—

Since filing

-0.87%

$0.98

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Frequently asked questions

What did HOWL file with the SEC on Nov 12, 2026?

HOWL filed a EFFECT (SEC filing). The SEC declared effective Werewolf Therapeutics' Form S-4 registration statement related to a merger or acquisition transaction.

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 HOWL stock react to this filing?

HOWL closed at $0.99 before the filing and $0.98 on Nov 12, 2026 (-0.90%).

Other HOWL SEC filings

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