Dimensional Fund Advisors Reduces Stake in HF Sinclair Corp Below 5%

Summary of Schedule 13G/A Filing

On October 8, 2026, Dimensional Fund Advisors LP filed an amended Schedule 13G (Amendment No. 1) with the SEC regarding its holdings in HF Sinclair Corp (CUSIP: 403949100).

Key Ownership Details

• Reporting Entity: Dimensional Fund Advisors LP (Investment Adviser)
• Event Trigger Date: September 30, 2026
• Shares Beneficially Owned: 7,252,148 shares of Common Stock
• Ownership Percentage: 4.1%
• Voting & Dispositive Authority:
  • Sole Voting Power: 7,124,602 shares
  • Shared Voting Power: 0 shares
  • Sole Dispositive Power: 7,252,148 shares
  • Shared Dispositive Power: 0 shares

Significant Developments

Under Item 5, Dimensional Fund Advisors LP certified that as of September 30, 2026, it has ceased to be the beneficial owner of more than 5 percent of the class of securities, bringing its beneficial ownership down to 4.1%. All reported shares are held by investment companies, trusts, and commingled accounts managed by Dimensional, and Dimensional disclaims beneficial ownership of the securities.