Diamondback Energy, Inc.

The full register, from 13F filings

The Register tab above is hand research: a dozen holders, each traced to the filing it came from. This asks the same question of the whole market for the quarter ended 31-mar-2026, where 1,175 managers reported a position. Broad where the research is deep, and shallow in the ways a 13F always is.

Built from 13F filings, which report US listed, long, US custodied positions only. A register from this source is a floor rather than a level: a holder's true position can be far larger, as BlackRock's ASML stake shows at 1.28m shares in a 13F against 26.3m in its 13G/A. Holdings held through derivatives, outside US custody, or below a manager's reporting obligation do not appear. Where a holder is marked as a family, its total sums several separate filing entities and describes something no single filing describes; the constituent entities and their share counts are listed so the total can be checked. That roll-up can legitimately exceed the family's own Schedule 13G, because a 13G is filed by one legal entity: Vanguard reports Alphabet through ten advisory entities, and The Vanguard Group Inc itself reported zero after its January 2026 disaggregation.

What a reader needs to know to read these numbers

• SEPARATELY LISTED SUBSIDIARY: Viper Energy, Inc. (Nasdaq: VNOM) is a majority-controlled but separately listed minerals and royalty company with real public minority shareholders (52.7% of the fully diluted total per its own 10-Q). This is treated as a HOLDING, not consolidated-away, following the Moody's/ICRA and Nucor precedent. Diamondback's interest is denominated in Viper Class B Common Stock paired 1:1 with Viper OpCo Units, a different instrument from the listed Class A Common Stock; shares is left null and the actual quantity (142,156,718) and Viper's own fully diluted denominator (362,918,848) are recorded in the holding's method_note and pct_denominator instead of being conflated with Class A share counts. Viper has changed legal form twice: the original Viper Energy Partners LP converted to a corporation (Viper Energy, Inc.) in 2023, and on 19 Aug 2025 that entity (renamed VNOM Sub, Inc.) became a wholly owned subsidiary of a new public parent (also named Viper Energy, Inc., formerly New Cobra Pubco, Inc.) via the Sitio Acquisition; the VNOM ticker continued uninterrupted through this second conversion.
• WORKING, ROYALTY AND MINERAL INTERESTS EXCLUDED: Diamondback and Viper hold extensive working interests, royalty interests and mineral interests in Permian Basin oil and gas properties (both consolidated and, through Viper, non-operated). These are direct interests in physical oil and gas properties, not equity stakes in other companies, and are correctly excluded from holdings entirely; they do not appear anywhere in this file.
• EQUITY METHOD: Diamondback's FY2025 10-K states its 'only significant equity method investment' was its 30% interest in Deep Blue Midland Basin LLC (the Five Point Energy water JV), carried at $229 million in 'Other assets' as of 30 Jun 2026 per the 10-Q's related-party note. No other named, individually-sized equity method or unconsolidated affiliate was found in the 10-Q or 10-K text searched for 'equity method', 'unconsolidated', 'joint venture', 'investments in' and 'noncontrolling interest'; the 10-Q's MD&A separately mentions 'income from equity method investees' (plural) in the aggregate without naming or sizing any investee besides Deep Blue, so no other position could be individually sized here.
• SELF-GATE: 8 register rows, 168,582,218 shares summed, 60.20% of the 280,024,353 shares outstanding denominator (computed with the chart's own arithmetic: no rolls_up_into rows exist in this file, so every row counts at full value). This is above the brief's usual 55% ceiling, driven almost entirely by SGF FANG Holdings, LP's single 84,036,722-share (30.01%) strategic/family stake arising from the Sept 2024 Endeavor Energy Resources merger (paid mostly in FANG stock to founder Autry C. Stephens and family). Excluding SGF, the remaining 7 institutional and insider rows sum to 84,545,496 shares, 30.19% of the company, squarely inside the typical 25-45% band. Treated as a genuine, verified concentration rather than a mixed-instrument or double-counting error: SGF's figure is a filed Schedule 13D/A restated in the 2026 proxy, is independent of the institutional 13F rows, and is not a component of the officers-and-directors group.
• SHARE BASIS: company.shares_outstanding (280,024,353) is taken from FANG's own Q2 2026 10-Q cover page, 'As of July 31, 2026'. No merger affected this basis: the large share-issuing Endeavor merger (Sept 2024) and the smaller Double Eagle acquisition (~6.84 million shares, April 2025) both predate every 13F used in this file (all Q2 2026, period ended 30 Jun 2026), so no stale pre-merger 13F risk applies here.
• VANGUARD CASE: Vanguard Group Inc (CIK 0000102909) filed Form 13F-NT (notice, no holdings) for Q2 2026, confirmed directly. Two of its successor entities were checked directly (13F-HR); the register row sums only those two rather than the full known 8-entity family, so likely understates Vanguard's true position (see unknowns). Wellington Management Co LLP (CIK 0001633863) similarly filed a 13F-NT naming its parent Wellington Management Group LLP (CIK 0000902219) as reporting entity; that parent's own 13F-HR was used directly and is a complete figure, not a partial roll-up.
• PROXY OMISSION: FANG's own 2026 DEF 14A 'Major Stockholder Table' (5%-holder table sourced from Schedule 13D/13G filings) lists only SGF FANG Holdings, LP and BlackRock, Inc., omitting Vanguard, State Street, Wellington and Capital Group even though each holds a multi-percent position per its own Q2 2026 13F. No fresher Vanguard/State Street/Wellington Schedule 13G or 13G/A on FANG was located within the time budget to confirm whether one exists at a level below 5% (plausible, since 13F holdings are split across many advisory sub-entities) or was simply not found.