The Williams Companies, Inc.
MX ˙ BMV ˙ US9694571004
SecurityMX:WMB / The Williams Companies, Inc.
InstitutionMariner, LLC
Latest Disclosed Ownership578,648 shares
Latest Disclosed Value $ 42,113,667
Mariner, LLC reports 0.50% increase in ownership of WMB / The Williams Companies, Inc.

On May 13, 2026 - Mariner, LLC filed a 13F-HR form disclosing ownership of 578,648 shares of The Williams Companies, Inc. (MX:WMB) valued at $42,113,667 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 575,757 shares of The Williams Companies, Inc.. This represents a change in shares of 0.50% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F WILLIAMS COS COM 969457100 578,648 2,891 0.50 42,114 21.69 0.0405
2026-02-13 2025-12-31 13F WILLIAMS COS COM 969457100 575,757 -2,281,870 -79.85 34,609 -80.88 0.0412
2025-11-14 2025-09-30 13F WILLIAMS COS COM 969457100 2,857,627 176 0.01 181,031 0.87 0.2339
2025-08-14 2025-06-30 13F WILLIAMS COS COM 969457100 2,857,451 49,960 1.78 179,476 6.97 0.2591
2025-05-15 2025-03-31 13F WILLIAMS COS COM 969457100 2,807,491 231,056 8.97 167,775 20.32 0.2792
2025-02-13 2024-12-31 13F WILLIAMS COS COM 969457100 2,576,435 4,174 0.16 139,437 18.75 0.2341
2024-11-13 2024-09-30 13F WILLIAMS COS COM 969457100 2,572,261 21,219 0.83 117,419 8.30 0.2083
2024-08-13 2024-06-30 13F WILLIAMS COS COM 969457100 2,551,042 1,891,955 287.06 108,419 322.13 0.2102
2024-05-15 2024-03-31 13F WILLIAMS COS COM 969457100 659,087 9,482 1.46 25,685 13.52 0.0531
2024-02-14 2023-12-31 13F WILLIAMS COS COM 969457100 649,605 21,956 3.50 22,626 7.00 0.0537
2023-11-13 2023-09-30 13F WILLIAMS COS COM 969457100 627,649 10,349 1.68 21,145 4.98 0.0567
2023-08-11 2023-06-30 13F WILLIAMS COS COM 969457100 617,300 -4,104 -0.66 20,142 111,800.00 0.0538
2023-05-15 2023-03-31 13F WILLIAMS COS COM 969457100 621,404 43,364 7.50 19 -99.91 0.0539
2023-02-14 2022-12-31 13F WILLIAMS COS COM 969457100 578,040 -5,768 -0.99 19,017 13.77 0.0611
2022-11-10 2022-09-30 13F WILLIAMS COS COM 969457100 583,808 70,102 13.65 16,715 4.26 0.0668
2022-08-15 2022-06-30 13F WILLIAMS COS COM 969457100 513,706 4,015 0.79 16,032 -5.85 0.0658
2022-05-13 2022-03-31 13F WILLIAMS COS COM 969457100 509,691 9,923 1.99 17,029 30.85 0.0643
2022-02-14 2021-12-31 13F WILLIAMS COS COM 969457100 499,768 -72,702 -12.70 13,014 -12.36 0.0550
2021-11-15 2021-09-30 13F WILLIAMS COS COM 969457100 572,470 -42,709 -6.94 14,850 -9.08 0.0775
2021-08-24 2021-06-30 13F WILLIAMS COS COM 969457100 615,179 -9,452 -1.51 16,333 10.38 0.1013
2021-05-07 2021-03-31 13F WILLIAMS COS COM 969457100 624,631 15,173 2.49 14,797 21.09 0.1032
2021-02-16 2020-12-31 13F WILLIAMS COS COM 969457100 609,458 33,625 5.84 12,220 8.00 0.0937
2020-11-13 2020-09-30 13F WILLIAMS COS COM 969457100 575,833 606 0.11 11,315 3.42 0.1065
2020-08-14 2020-06-30 13F WILLIAMS COS COM 969457100 575,227 25,358 4.61 10,941 40.63 0.1097
2020-05-14 2020-03-31 13F WILLIAMS COS COM 969457100 549,869 -142,083 -20.53 7,780 -52.60 0.0972
2020-02-13 2019-12-31 13F WILLIAMS COS INC DEL COM 969457100 691,952 -7,148 -1.02 16,413 -2.42 0.1704
2019-11-13 2019-09-30 13F WILLIAMS COS INC DEL COM 969457100 699,100 80,886 13.08 16,820 -2.97 0.2012
2019-08-14 2019-06-30 13F WILLIAMS COS INC DEL COM 969457100 618,214 -16,357 -2.58 17,335 -4.88 0.2068
2019-05-15 2019-03-31 13F WILLIAMS COS INC DEL COM 969457100 634,571 777 0.12 18,225 30.42 0.2598
2019-02-13 2018-12-31 13F WILLIAMS COS INC DEL COM 969457100 633,794 -10,350 -1.61 13,974 -20.21 0.2488
2018-11-14 2018-09-30 13F WILLIAMS COS INC DEL COM 969457100 644,144 258,891 67.20 17,514 67.69 0.4503
2018-08-14 2018-06-30 13F WILLIAMS COS INC DEL COM 969457100 385,253 -5,902 -1.51 10,444 7.40 0.2961
2018-05-15 2018-03-31 13F WILLIAMS COS INC DEL COM 969457100 391,155 67,356 20.80 9,724 -1.51 0.3486
2018-02-09 2017-12-31 13F WILLIAMS COS INC DEL COM 969457100 323,799 5,236 1.64 9,873 3.27 0.3820
2017-11-14 2017-09-30 13F WILLIAMS COS INC DEL COM 969457100 318,563 -10,190 -3.10 9,560 -3.97 0.4322
2017-08-11 2017-06-30 13F WILLIAMS COS INC DEL COM 969457100 328,753 -491,048 -59.90 9,955 -58.96 0.4684
2017-05-15 2017-03-31 13F WILLIAMS COS INC DEL COM 969457100 819,801 82,697 11.22 24,258 5.68 1.0565
2017-02-14 2016-12-31 13F WILLIAMS COS INC DEL COM 969457100 737,104 131,605 21.73 22,954 23.36 1.0579
2016-11-14 2016-09-30 13F WILLIAMS COS INC DEL COM 969457100 605,499 -7,085 -1.16 18,607 40.43 0.8989
2016-08-12 2016-06-30 13F WILLIAMS COS INC DEL COM 969457100 612,584 1,382 0.23 13,250 34.90 0.7169
2016-05-13 2016-03-31 13F WILLIAMS COS INC DEL COM 969457100 611,202 24,330 4.15 9,822 -34.88 0.5833
2016-02-16 2015-12-31 13F WILLIAMS COS INC DEL COM 969457100 586,872 -13,861 -2.31 15,082 -31.87 0.9676
2015-11-16 2015-09-30 13F WILLIAMS COS INC DEL COM 969457100 600,733 6,161 1.04 22,137 -35.12 0.9836
2015-08-17 2015-06-30 13F WILLIAMS COS INC DEL COM 969457100 594,572 313,934 111.86 34,122 140.35 1.5822
2015-05-15 2015-03-31 13F WILLIAMS COS INC DEL COM 969457100 280,638 23,713 9.23 14,197 22.96 1.2071
2015-02-13 2014-12-31 13F WILLIAMS COS INC DEL COM 969457100 256,925 20,675 8.75 11,546 -11.71 1.0392
2014-11-13 2014-09-30 13F WILLIAMS COS INC DEL COM 969457100 236,250 36,988 18.56 13,077 12.74 1.4726
2014-08-21 2014-06-30 13F WILLIAMS COS INC DEL COM 969457100 199,262 -9,918 -4.74 11,599 36.64 1.2860
2014-05-08 2014-03-31 13F WILLIAMS COS INC DEL COM 969457100 209,180 2,693 1.30 8,489 6.59 1.0929
2014-02-14 2013-12-31 13F WILLIAMS COS INC DEL COM 969457100 206,487 40,894 24.70 7,964 32.27 0.9976
2013-11-14 2013-09-30 13F WILLIAMS COS INC DEL COM 969457100 165,593 92,187 125.59 6,021 152.66 1.1098
2013-08-19 2013-06-30 13F WILLIAMS COS INC DEL COM 969457100 73,406 73,406 2,383 0.5024
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.