The Williams Companies, 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 1,788 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

• Vanguard Group Inc (CIK 0000102909) filed 13F-NT (notice, no holdings) for the quarter ended 30 June 2026, consistent with the January 2026 reorganisation of Vanguard's 13F filing structure. Per the brief, Vanguard is represented as a single substituted row summing the two successor entities that filed 13F-HR for the quarter (Vanguard Capital Management LLC and Vanguard Portfolio Management LLC) rather than listed multiple times.
• Excluded from holdings: Discovery Producer Services, LLC. Williams held a 60 percent equity-method interest in Discovery but acquired the remaining 40 percent in August 2024, making it a wholly owned, consolidated subsidiary. Also excluded: Cardinal Gas Services, L.L.C. (66 percent interest) and Ohio Valley Midstream LLC / Northeast JV (65 percent interest), both consolidated variable interest entities where Williams is the primary beneficiary, meaning Williams controls and fully consolidates them rather than holding a minority equity-method stake; these are Williams' own operating subsidiaries with outside minority partners, not stakes Williams holds in someone else's company. MountainWest Pipelines Holding LLC is likewise a wholly consolidated Williams subsidiary. None of these appear in holdings per the brief's exclusion of wholly owned/consolidated operating subsidiaries.
• Excluded from holdings: Brazos Permian II, LLC. Williams sold this equity-method investment in June 2026 for $143 million total consideration, receiving 'publicly traded limited partner units of the acquirer' as most of the consideration. The FY2025 10-Q/10-K do not name the acquirer or size the resulting security position in shares or dollars, so it is not recorded; see unknowns.
• Excluded from holdings: the July 2026 Power Innovation joint venture (Socrates, Apollo, Aquila, Socrates the Younger, Neo). Williams sold a 49 percent NONcontrolling interest in these five power projects to an outside investor for $5.34 billion of committed capital; this is equity Williams sold to someone else in Williams' own projects, not a stake Williams holds in another company, so it is not a holding under this brief.
• Un-split combined balances not assigned to a named holding: the FY2025 10-K equity-method investments table includes an 'Other Various' line of $175 million (2025) covering unnamed smaller investments, and the Q2 2026 10-Q states total 'Investments' on the balance sheet of $4,515 million versus the FY2025 total of $4,518 million from the named-investee table below; neither the $175 million 'Other' line nor the small quarter-over-quarter movement is broken out by name, so no holding is sized from them.
• Cross-check: the FY2025 10-K equity-method investments table (Note 8, values in millions) sums exactly to the reported $4,518 million total: Appalachia Midstream Investments $2,737 (~66% avg) + OPPL $376 (50%) + Blue Racer $341 (50%) + Cogentrix $292 + Louisiana LNG $253 (10%) + Gulfstream $185 (50%) + Laurel Mountain $159 (69%) + Other Various $175. This project's holdings use these FY2025 figures except Cogentrix and Louisiana LNG, which the Q2 2026 10-Q separately restates at $289 million each.
• Market capitalisation of $91.98 billion and the $73.04 share price are stockanalysis.com's figures as of 14 August 2026 (previous close). Cross-check: 1,223,167,472 shares x $73.04 implies approximately $89.3 billion, about 3 percent below the reported $91.98 billion market cap, consistent with a data-provider share count that differs slightly from the 10-Q cover page count used here (or intraday timing).
• Register reconciliation: the 2026 proxy's beneficial-ownership footnotes describe Vanguard's, BlackRock's and State Street's most recent 13F/13G voting-power detail (13F-HR filings dated Jan-Feb 2026, an earlier quarter than the Q2 2026 13F-HR data used in the register) but do not restate their share counts as percentages of the class, so no separate 13G cross-check row is added for them.
• Insider rows use the Q2 2026 10-Q's 1,223,167,472 shares-outstanding denominator even though the proxy's beneficial-ownership table is dated 24 Feb 2026, an earlier and likely slightly different share count; the proxy itself states all individual and group insider ownership is under 1% of the class regardless of exact denominator, so this does not change the characterisation.
• Self-gate check: summing the eight non-aggregate, non-insider register rows (Vanguard 123,361,892 + BlackRock 115,500,312 + State Street 72,015,506 + Bank of America 44,667,824 + Wellington 33,097,208 + Morgan Stanley 31,813,505 + Geode 29,911,265 + JPMorgan 21,379,796) gives 471,747,308 shares against 1,223,167,472 shares outstanding, or 38.57%, within the expected 15 to 55 percent range.