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FULC SCHEDULE 13G/A: SEC filing

Nantahala Capital Management

Filed with the SEC on · accession 0001104659-26-127211

FULC filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 13, 2026. Nantahala Capital Management filed an amended Schedule 13G reporting beneficial ownership of 6,575,352 shares, or 8.62%, of Fulcrum Therapeutics common stock as of September 30, 2026. The stock moved +2.4% by the first close after the filing.

Summary of the filing

Nantahala Capital Management filed an amended Schedule 13G reporting beneficial ownership of 6,575,352 shares, or 8.62%, of Fulcrum Therapeutics common stock as of September 30, 2026. The filing is a passive institutional ownership disclosure with no stated intent to influence control.

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Key details

Shares beneficially owned$6.6M
Percent of class beneficially ownedPCT 9
IssuerFulcrum Therapeutics, Inc.
Reporting person / beneficial ownerNantahala Capital Management, LLC
Managing member, nantahala capital managementWilmot B. Harkey
Managing member, nantahala capital managementDaniel Mack
Chief compliance officer, nantahala capital managementTaki Vasilakis

How FULC stock reacted

Close before

$3.68

Nov 12, 2026

First close after

+2.45%

$3.77

5 trading days

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Since filing

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Frequently asked questions

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

FULC filed a SCHEDULE 13G/A (SEC filing). Nantahala Capital Management filed an amended Schedule 13G reporting beneficial ownership of 6,575,352 shares, or 8.62%, of Fulcrum Therapeutics common stock as of September 30, 2026. The filing is a passive institutional ownership disclosure with no stated intent to influence control.

How do I read a SCHEDULE 13G/A?

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

How did FULC stock react to this filing?

FULC closed at $3.68 before the filing and $3.77 on Nov 13, 2026 (+2.45%).

Other FULC SEC filings

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