LNTH SCHEDULE 13G/A: SEC filing

An institutional holder

Filed with the SEC on Nov 5, 2026 · accession 0000315066-26-002780

LNTH filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 5, 2026. An institutional holder filed an amended Schedule 13G for Lantheus Holdings, indicating a change in passive ownership position. The stock moved -0.4% by the first close after the filing.

Summary of the filing

An institutional holder filed an amended Schedule 13G for Lantheus Holdings, indicating a change in passive ownership position. The filing does not disclose a control intent or activist campaign.

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Key details

IssuerLantheus Holdings, Inc.

How LNTH stock reacted

Close before

$101.14

Nov 4, 2026

First close after

-0.44%

$100.70

5 trading days

—

Since filing

-0.52%

$100.61

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Frequently asked questions

What did LNTH file with the SEC on Nov 5, 2026?

LNTH filed a SCHEDULE 13G/A (SEC filing). An institutional holder filed an amended Schedule 13G for Lantheus Holdings, indicating a change in passive ownership position. The filing does not disclose a control intent or activist campaign.

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 LNTH stock react to this filing?

LNTH closed at $101.14 before the filing and $100.70 on Nov 5, 2026 (-0.44%).

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