The Williams Companies, Inc.
MX ˙ BMV ˙ US9694571004
SecurityMX:WMB / The Williams Companies, Inc.
InstitutionELCO Management Co., LLC
Latest Disclosed Ownership181,958 shares
Latest Disclosed Value $ 13,242,903
ELCO Management Co., LLC reports 38.83% increase in ownership of WMB / The Williams Companies, Inc.

On April 23, 2026 - ELCO Management Co., LLC filed a 13F-HR form disclosing ownership of 181,958 shares of The Williams Companies, Inc. (MX:WMB) valued at $13,242,903 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 131,064 shares of The Williams Companies, Inc.. This represents a change in shares of 38.83% 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)
2026-04-23 2026-03-31 13F WILLIAMS COS COM 969457100 181,958 50,894 38.83 13,243 68.09 6.2492
2026-02-04 2025-12-31 13F WILLIAMS COS COM 969457100 131,064 -51,111 -28.06 7,878 -31.73 4.9666
2025-11-05 2025-09-30 13F WILLIAMS COS COM 969457100 182,175 -4,341 -2.33 11,541 -1.49 6.0173
2025-08-04 2025-06-30 13F WILLIAMS COS COM 969457100 186,516 2,459 1.34 11,715 6.51 6.1371
2025-05-01 2025-03-31 13F WILLIAMS COS COM 969457100 184,057 -16,749 -8.34 10,999 1.21 6.0805
2025-02-13 2024-12-31 13F WILLIAMS COS COM 969457100 200,806 -10,913 -5.15 10,868 12.45 5.7105
2024-11-14 2024-09-30 13F WILLIAMS COS COM 969457100 211,719 -353 -0.17 9,665 7.22 5.2139
2024-08-14 2024-06-30 13F WILLIAMS COS COM 969457100 212,072 -17,724 -7.71 9,013 0.65 5.2453
2024-05-14 2024-03-31 13F WILLIAMS COS COM 969457100 229,796 -9,764 -4.08 8,955 7.34 5.4530
2024-02-14 2023-12-31 13F WILLIAMS COS COM 969457100 239,560 -8,706 -3.51 8,344 -0.25 5.4973
2023-11-14 2023-09-30 13F WILLIAMS COS COM 969457100 248,266 -6,808 -2.67 8,364 0.49 6.0401
2023-08-11 2023-06-30 13F WILLIAMS COS COM 969457100 255,074 -647 -0.25 8,323 9.01 6.0214
2023-05-15 2023-03-31 13F WILLIAMS COS COM 969457100 255,721 3,475 1.38 7,636 -7.99 5.5510
2023-02-14 2022-12-31 13F WILLIAMS COS COM 969457100 252,246 630 0.25 8,299 15.19 6.2370
2022-11-14 2022-09-30 13F WILLIAMS COS COM 969457100 251,616 2,583 1.04 7,204 -7.31 5.7355
2022-08-12 2022-06-30 13F WILLIAMS COS COM 969457100 249,033 -2,428 -0.97 7,772 -7.49 6.3732
2022-05-16 2022-03-31 13F WILLIAMS COS COM 969457100 251,461 11,225 4.67 8,401 34.29 5.7192
2022-02-14 2021-12-31 13F WILLIAMS COS COM 969457100 240,236 -2,040 -0.84 6,256 -0.46 4.4711
2021-11-15 2021-09-30 13F WILLIAMS COS COM 969457100 242,276 -1,786 -0.73 6,285 -3.01 4.8343
2021-08-11 2021-06-30 13F WILLIAMS COS COM 969457100 244,062 121,979 99.91 6,480 124.07 4.8108
2021-05-14 2021-03-31 13F WILLIAMS COS COM 969457100 122,083 -136,133 -52.72 2,892 -44.14 2.6172
2021-02-16 2020-12-31 13F WILLIAMS COS COM 969457100 258,216 -33,887 -11.60 5,177 -9.81 4.4644
2020-11-12 2020-09-30 13F WILLIAMS COS COM 969457100 292,103 51,127 21.22 5,740 25.25 4.6806
2020-08-13 2020-06-30 13F WILLIAMS COS COM 969457100 240,976 -65,523 -21.38 4,583 5.67 3.8580
2020-05-14 2020-03-31 13F WILLIAMS COS COM 969457100 306,499 -31,299 -9.27 4,337 -45.88 4.5353
2020-02-14 2019-12-31 13F WILLIAMS COS INC DEL COM 969457100 337,798 -17,138 -4.83 8,013 -6.17 4.8272
2019-11-14 2019-09-30 13F WILLIAMS COS INC DEL COM 969457100 354,936 3,770 1.07 8,540 -13.27 5.1392
2019-08-01 2019-06-30 13F WILLIAMS COS INC DEL COM 969457100 351,166 -9,500 -2.63 9,847 -4.93 5.4482
2019-05-13 2019-03-31 13F WILLIAMS COS INC DEL COM 969457100 360,666 -6,315 -1.72 10,358 28.00 6.1177
2019-02-14 2018-12-31 13F WILLIAMS COS INC DEL COM 969457100 366,981 -3,392 -0.92 8,092 -19.64 5.4991
2018-11-13 2018-09-30 13F WILLIAMS COS INC DEL COM 969457100 370,373 36,002 10.77 10,070 11.09 5.3050
2018-07-17 2018-06-30 13F WILLIAMS COS INC DEL COM 969457100 334,371 4,120 1.25 9,065 10.41 4.8717
2018-05-14 2018-03-31 13F WILLIAMS COS INC DEL COM 969457100 330,251 3,260 1.00 8,210 -17.65 4.8317
2018-02-09 2017-12-31 13F WILLIAMS COS INC DEL COM 969457100 326,991 -4,044 -1.22 9,970 0.36 5.5030
2017-11-14 2017-09-30 13F WILLIAMS COS INC DEL COM 969457100 331,035 7,681 2.38 9,934 1.46 5.5915
2017-08-14 2017-06-30 13F WILLIAMS COS INC DEL COM 969457100 323,354 -1,074 -0.33 9,791 1.99 5.7136
2017-05-15 2017-03-31 13F WILLIAMS COS INC DEL COM 969457100 324,428 19,026 6.23 9,600 0.95 5.1295
2017-02-14 2016-12-31 13F WILLIAMS COS INC DEL COM 969457100 305,402 -102,745 -25.17 9,510 -24.43 5.2810
2016-12-29 2016-09-30 13F WILLIAMS COS INC DEL COM 969457100 408,147 408,147 12,585 5.0223
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.