Diamondback Energy (FANG)Yacktman Asset Management LP added to its stake +10K shares

1.01M

Shares reported · +10K vs prior quarter

2.2%

Disclosed portfolio weight

$178M

Reported value

Holdings as of

Jun 30, 2026

Filed

Aug 11, 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. Jun 12, 2026Company filing · Form 8-K · Material agreement, New debtSigned an important agreement, and took on new debt or obligations
2. Jun 16, 2026Insider · 1 personInsiders: 3 sales (~$15.6M)
3. Jul 13, 2026Company filing · Form 8-K · ResultsReported its results
4. Aug 3, 2026Company filing · Form 8-K · ResultsReported its results
5. Aug 3, 2026Insider · 1 personInsiders: 4 sales (~$6.6M)
6. Aug 11, 2026InsiderCEO sold ~$1.01M of FANG shares in the open market

What came next

1. Aug 13, 20265% stakeWellington Management Group LLP reported a passive stake (13G) of 5.8%
2. Aug 14, 2026Insider · 2 peopleInsiders: 2 sales (~$609K)
3. Aug 20, 2026Insider · 2 peopleInsiders: 3 sales (~$3.8M)
4. Aug 21, 2026InsiderDirector sold ~$211K of FANG shares in the open market
5. Sep 11, 2026Insider · Their largest sale since 2013Director sold ~$15.3M of FANG shares in the open market
6. Sep 15, 2026Insider · 2 peopleInsiders: 2 sales (~$1.3M)
7. Sep 16, 2026Insider · 13 days before an 8-K10% owner sold ~$1.86B of FANG shares in the open market
8. Sep 17, 20265% stakeSGF FANG Holdings, LP filed an activist stake (13D) of 23.2%
9. Sep 29, 2026Company filing · Form 8-K · Material agreement, Executive changeChanged a top executive or board member, and signed an important agreement“In connection with a Board Stepdown (as defined in the Stockholders Agreement), and not due to any disagreement with the Company on any matter relating to the Company’s operations, policies or practices, Darin Holderness and Lance Robertson resigned from the Board on September 29, 2026 and September 30, 2026, respectively.”
10. Oct 5, 2026Insider · 1 personInsiders: 3 sales (~$6.1M)
11. Oct 8, 2026Company filing · Form 8-K · ResultsReported its results

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Diamondback Energy

For Diamondback Energy, OQRO holds 23 insider filings (SEC Form 4 or Form 144) and 13 fund holdings reports (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 FANG page.

How this filing works

• SEC Form 13F

Other disclosures at Diamondback Energy

• SEC Form 4Oct 7, 2026
• SEC Form 4Oct 7, 2026
• SEC Form 4Oct 7, 2026
• SEC Form 144Oct 5, 2026
• SEC Form 4Sep 17, 2026
• SEC Schedule 13DSep 17, 2026

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