Vanguard Capital Management filed an amended beneficial ownership statement with the SEC on October 30, 2026, disclosing a 4.97% stake in NPK International Inc as of September 30, 2026.

Key Highlights

  • Filer: Vanguard Capital Management, organized in Pennsylvania and classified as an investment adviser, filed Amendment No. 1 to its ownership statement.
  • Aggregate beneficial ownership: 4,226,179 shares of NPK International Inc common stock, representing 4.97% of the class.
  • Sole voting power: 631,526 shares; shared voting power reported as 0.
  • Sole dispositive power: 4,226,179 shares; shared dispositive power reported as 0.
  • Triggering event date: September 30, 2026, with the filing signed on October 30, 2026.
  • Certification: Vanguard stated the securities "were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer."

Vanguard Capital Management Discloses Ownership Position in NPK International

According to the filing, Vanguard Capital Management, headquartered at 100 Vanguard Blvd, Malvern, PA 19355, submitted Amendment No. 1 to its beneficial ownership statement covering common stock of NPK International Inc (NYSE:NPKI), whose principal executive offices are listed at 99320 Lakeside Blvd, Suite 100, The Woodlands, TX 77381. The filing reports an aggregate beneficial ownership of 4,226,179 shares, equal to 4.97% of the outstanding class, as of the September 30, 2026 event date.

The filing explains that the reported position reflects securities beneficially owned by Vanguard Capital Management LLC and certain of its affiliates and business divisions, including Vanguard Asset Management Limited, Vanguard Fiduciary Trust Company, Vanguard Global Advisers, LLC, and Vanguard Investments Australia Ltd. The statement covers holdings in Vanguard funds or sleeves thereof over which Vanguard Capital Management LLC exercises dispositive power, as well as securities held by clients over which the named affiliates or divisions exercise dispositive and/or voting power.

The filing further discloses that Vanguard Capital Management, including registered investment companies and other managed accounts, holds the right to receive or the power to direct the receipt of dividends from, or proceeds from the sale of, the reported securities. According to the filing, no single other person's interest in those securities exceeds 5%. The statement was signed by My Trieu-Gatt, identified as Authorized Signatory and Head of Global Fund Administration, on October 30, 2026.

What Was Disclosed

Vanguard Capital Management disclosed an amended beneficial ownership position of 4,226,179 shares, or 4.97%, of NPK International Inc common stock as of September 30, 2026, with sole dispositive power over all reported shares and sole voting power over 631,526 shares.