HF Sinclair (DINO): REH Advisors Inc. cut its DINO stake below 5% (2.7%) 2.7%

2.7%

Stake

4.43M

Shares owned

Stake as of

Oct 29, 2026

Filed

Nov 10, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Oct 8, 20265% stakeDimensional Fund Advisors LP reported a passive stake (13G) of 4.1%
2. Oct 28, 2026Company filing · Form 8-K · Results, Executive changeChanged a top executive or board member, and reported its results (and 1 more item)“On October 26, 2026, the Board of Directors (the “Board”) of the Corporation appointed Steve Ledbetter, who currently serves as the Corporation’s President and Chief Operating Officer, as Chief Executive Officer and President, effective January 1, 2027.”
3. Oct 29, 2026Insider · 14 days before an 8-KCEO purchased ~$1.11M of DINO shares in the open market

What came next

1. Oct 30, 2026Company filing · Form 8-K · Material agreementSigned an important agreement
2. Nov 4, 2026Company filing · Form 8-K · Material agreementSigned an important agreement
3. Nov 10, 20265% stakeREH Advisors Inc. filed an activist stake (13D) of 2.7%
4. Nov 12, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On November 10, 2026, the Board of Directors (the “ Board ”) of HF Sinclair Corporation (the “ Corporation ”) expanded the size of the Board from ten to eleven members and appointed Steve Ledbetter to the Board, effective as of November 10, 2026.”

How to read SEC Schedule 13D

A Schedule 13D and a Schedule 13G both disclose beneficial ownership of more than 5% of a US company's voting shares. A 13D is the long form, filed by holders who may seek to influence or control the company, and it must state what they intend to do. A 13G is the short form, open only to passive holders and to certain institutions holding in the ordinary course of business, and it asks no question about intent.

Full guide: Schedule 13D vs Schedule 13G: what is the difference?

What else is on file for HF Sinclair

For HF Sinclair, OQRO holds 1 insider filing (SEC Form 4 or Form 144) and 1 fund holdings report (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its DINO page.

How this filing works

• Schedule 13D vs 13G

Other disclosures at HF Sinclair

• SEC Form 4Oct 29, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 12, 2026

Everything OQRO holds on this company is on its DINO page.