Vanguard Portfolio Management LLC filed an amended beneficial ownership statement with the SEC on October 30, 2026, disclosing a 7.22% stake in AtriCure Inc as of September 30, 2026.

Key Highlights

  • Total beneficial ownership: Vanguard Portfolio Management reported aggregate beneficial ownership of 3,676,303 shares of AtriCure common stock.
  • Percent of class: The reported position represents 7.22% of AtriCure's outstanding common stock.
  • Sole dispositive power: Vanguard Portfolio Management holds sole power to dispose of all 3,676,303 shares reported.
  • Sole voting power: Sole voting power is limited to 49,307 shares, with no shared voting power reported.
  • Event date: The date of the event requiring this filing is September 30, 2026.
  • Filing type: This is Amendment No. 1 to a prior beneficial ownership statement, signed by My Trieu-Gatt, Authorized Signatory and Head of Global Fund Administration.

Vanguard Portfolio Management's Position in AtriCure as of September 2026

According to the filing, Vanguard Portfolio Management LLC, organized in Pennsylvania and classified as an investment adviser, reported beneficial ownership of 3,676,303 shares of common stock in AtriCure Inc (NASDAQ:ATRC), a medical device company headquartered at 7555 Innovation Way, Mason, OH 45040. The filing identifies AtriCure's common stock by CUSIP number 04963C209. This amendment updates a prior statement and reflects holdings as of the event date of September 30, 2026.

The filing notes that the reported shares include securities held by Vanguard funds, or sleeves thereof, over which Vanguard Portfolio Management LLC exercises dispositive power, as well as securities held by clients over which affiliates including Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC exercise dispositive and/or voting power. According to the filing, the statement does not include securities beneficially owned by other subsidiaries or affiliates of Vanguard Portfolio Management LLC whose ownership is disaggregated from that of the reporting business unit in accordance with SEC Release No. 34-39538 dated January 12, 1998.

The filing further states that Vanguard Portfolio Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported. The filing specifies that no single other person's interest in the securities reported exceeds 5%. The certification included in the filing states that the securities "were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer."

What Was Disclosed

Vanguard Portfolio Management LLC filed an amended beneficial ownership statement disclosing 3,676,303 shares, or 7.22%, of AtriCure Inc common stock as of September 30, 2026, with sole dispositive power over all reported shares and sole voting power over 49,307 shares.