Vanguard Portfolio Management LLC filed a Schedule 13G with the SEC on October 30, 2026, disclosing beneficial ownership of 44,667,027 shares of Halliburton Co common stock as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: Vanguard Portfolio Management reported 44,667,027 shares of Halliburton Co common stock beneficially owned.
  • Percent of class: The reported position represents 5.36% of the outstanding class of common stock.
  • Sole dispositive power: Vanguard Portfolio Management holds sole power to dispose of all 44,667,027 shares.
  • Sole voting power: Sole voting power is reported for only 100,285 shares, with shared voting power of zero.
  • Triggering date: The date of the event requiring the filing is stated as September 30, 2026.
  • Affiliated entities included: The filing covers securities beneficially owned by Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC, as affiliates or business divisions.

Vanguard Portfolio Management's Disclosed Position in Halliburton Co

According to the Schedule 13G filed on October 30, 2026, Vanguard Portfolio Management LLC, organized in Pennsylvania and located at 100 Vanguard Blvd, Malvern, PA 19355, reported beneficial ownership of 44,667,027 shares of Halliburton Co (CUSIP 406216101) common stock. The filing identifies Halliburton Co's principal executive offices at 3000 North Sam Houston Parkway East, Houston, TX 77032. Vanguard Portfolio Management is classified as an investment adviser (type "IA") for purposes of the filing.

The filing states that sole dispositive power covers all 44,667,027 shares, while sole voting power applies to only 100,285 shares. Shared voting power and shared dispositive power are each reported as zero. The filing notes, consistent with SEC Release No. 34-39538 (January 12, 1998), that the reported securities include those 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 Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC exercise dispositive and/or voting power.

Regarding beneficial ownership on behalf of other persons, the filing discloses that "Vanguard Portfolio Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein," and that "No one other person's interest in the securities reported herein is more than 5%." The filing was signed by My Trieu-Gatt, Authorized Signatory and Head of Global Fund Administration, on October 30, 2026.

What Was Disclosed

Vanguard Portfolio Management LLC disclosed in a Schedule 13G filed October 30, 2026, that it beneficially owns 44,667,027 shares, or 5.36%, of Halliburton Co common stock as of September 30, 2026, with full sole dispositive power and limited sole voting power of 100,285 shares.