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IRTC SCHEDULE 13G/A: SEC filing

Artisan Partners Limited Partnership and affiliated entities

Filed with the SEC on · accession 0001193125-26-456861

IRTC filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 12, 2026. Artisan Partners Limited Partnership and affiliated entities filed an amended Schedule 13G indicating beneficial ownership of 2,195,855 shares, or 6.7%, of iRhythm Holdings, Inc. common stock as of September 30, 2026. The stock moved +5.5% by the first close after the filing.

Summary of the filing

Artisan Partners Limited Partnership and affiliated entities filed an amended Schedule 13G indicating beneficial ownership of 2,195,855 shares, or 6.7%, of iRhythm Holdings, Inc. common stock as of September 30, 2026. The filing is a passive institutional ownership disclosure with no intent to influence control.

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Key details

Shares beneficially owned$2.2M
Percent of class owned$7
Reporting person / beneficial ownerArtisan Partners Limited Partnership
Parent entity of reporting personArtisan Partners Asset Management Inc.
Affiliate of reporting personArtisan Partners Holdings LP
General partner of reporting personArtisan Investments GP LLC
IssueriRhythm Holdings, Inc.
Executive vice president, artisan partners asset management inc.Gregory K. Ramirez

How IRTC stock reacted

Close before

$88.68

Nov 11, 2026

First close after

+5.50%

$93.56

5 trading days

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Since filing

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Frequently asked questions

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

IRTC filed a SCHEDULE 13G/A (SEC filing). Artisan Partners Limited Partnership and affiliated entities filed an amended Schedule 13G indicating beneficial ownership of 2,195,855 shares, or 6.7%, of iRhythm Holdings, Inc. common stock as of September 30, 2026. The filing is a passive institutional ownership disclosure with no 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 IRTC stock react to this filing?

IRTC closed at $88.68 before the filing and $93.56 on Nov 12, 2026 (+5.50%).

Other IRTC SEC filings

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