The Williams Companies, Inc.
MX ˙ BMV ˙ US9694571004
SecurityMX:WMB / The Williams Companies, Inc.
InstitutionTortoise Capital Advisors, L.l.c.
Latest Disclosed Ownership11,499,134 shares
Latest Disclosed Value $ 836,906,991
Tortoise Capital Advisors, L.l.c. reports 1.20% increase in ownership of WMB / The Williams Companies, Inc.

On May 15, 2026 - Tortoise Capital Advisors, L.l.c. filed a 13F-HR form disclosing ownership of 11,499,134 shares of The Williams Companies, Inc. (MX:WMB) valued at $836,906,991 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 11,362,696 shares of The Williams Companies, Inc.. This represents a change in shares of 1.20% 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)
2026-05-15 2026-03-31 13F WILLIAMS COS INC COM cs 969457100 11,499,134 136,438 1.20 836,907 22.53 4.8146
2026-02-17 2025-12-31 13F WILLIAMS COS INC COM COM 969457100 11,362,696 375,147 3.41 683,012 -1.87 8.6911
2025-11-13 2025-09-30 13F WILLIAMS COS INC COM COM 969457100 10,987,549 131,142 1.21 696,061 2.08 8.9769
2025-08-14 2025-06-30 13F WILLIAMS COS INC COM cs 969457100 10,856,407 -484,507 -4.27 681,891 0.61 8.8951
2025-05-14 2025-03-31 13F WILLIAMS COS INC COM COM 969457100 11,340,914 -118,013 -1.03 677,733 9.28 8.1944
2025-02-13 2024-12-31 13F WILLIAMS COS INC COM cs 969457100 11,458,927 -849,820 -6.90 620,157 10.37 7.9399
2024-11-13 2024-09-30 13F WILLIAMS COS INC COM com 969457100 12,308,747 -361,428 -2.85 561,894 4.35 7.2400
2024-08-05 2024-06-30 13F WILLIAMS COS INC COM cs 969457100 12,670,175 144,713 1.16 538,482 10.32 7.1237
2024-05-10 2024-03-31 13F WILLIAMS COS INC COM cs 969457100 12,525,462 -107,426 -0.85 488,117 10.93 6.8177
2024-02-14 2023-12-31 13F WILLIAMS COS cs 969457100 12,632,888 -678,946 -5.10 440,003 -1.89 6.7907
2023-11-13 2023-09-30 13F WILLIAMS COMPANIES cs 969457100 13,311,834 1,190,007 9.82 448,476 13.38 6.8326
2023-08-14 2023-06-30 13F WILLIAMS COS cs 969457100 12,121,827 24,567 0.20 395,535 9.50 6.0316
2023-05-11 2023-03-31 13F WILLIAMS COS cs 969457100 12,097,260 402,966 3.45 361,224 -6.11 5.4284
2023-02-13 2022-12-31 13F WILLIAMS COS cs 969457100 11,694,294 -223,679 -1.88 384,742 12.76 5.7659
2022-11-14 2022-09-30 13F WILLIAMS COS cs 969457100 11,917,973 -964 -0.01 341,211 -8.27 5.3848
2022-08-15 2022-06-30 13F/A-1 WILLIAMS COS cs 969457100 11,918,937 -832,735 -6.53 371,990 -12.69 5.8145
2022-08-10 2022-06-30 13F WILLIAMS COS cs 969457100 11,918,937 -832,735 371,990 4.9452
2022-05-16 2022-03-31 13F WILLIAMS COS cs 969457100 12,751,672 -12,976,590 -50.44 426,034 -36.41 5.6598
2022-02-14 2021-12-31 13F WILLIAMS COS cs 969457100 25,728,262 12,910,027 100.72 669,964 101.49 10.1168
2021-11-04 2021-09-30 13F Williams Companies cs 969457100 12,818,235 -637,355 -4.74 332,505 -6.93 5.3703
2021-08-10 2021-06-30 13F Williams Companies cs 969457100 13,455,590 -5,507,335 -29.04 357,246 -20.48 5.4171
2021-05-17 2021-03-31 13F Williams Companies cs 969457100 18,962,925 -243,312 -1.27 449,232 16.66 7.5150
2021-02-16 2020-12-31 13F/A-1 Williams Companies cs 969457100 19,206,237 -2,505,820 -11.54 385,085 -9.74 7.4449
2021-02-16 2020-12-31 13F Williams Companies cs 969457100 1,291,439 -20,420,618 25,893 7.3075
2020-11-13 2020-09-30 13F Williams Companies cs 969457100 21,712,057 3,264,573 17.70 426,642 21.60 8.5411
2020-08-14 2020-06-30 13F Williams Companies cs 969457100 18,447,484 -7,436,759 -28.73 350,871 -4.20 5.6399
2020-05-14 2020-03-31 13F/A-1 Williams Companies cs 969457100 25,884,243 -11,921,432 -31.53 366,262 -59.16 6.7552
2020-05-14 2020-03-31 13F Williams Companies cs 969457100 25,884,243 -11,921,432 366,262 4,101,662.3479
2020-02-21 2019-12-31 13F/A-2 Williams Companies COM 969457100 37,805,675 -3,282,538 -7.99 896,751 -9.29 5.6974
2020-02-19 2019-12-31 13F/A-1 Williams Companies COM 969457100 37,805,675 0 896,751 5.5173
2020-02-14 2019-12-31 13F Williams Companies COM 969457100 37,805,675 -3,282,538 896,751 3,608,304.3982
2019-11-14 2019-09-30 13F Williams Companies COM 969457100 41,088,213 4,978,617 13.79 988,582 -2.36 6.0564
2019-08-14 2019-06-30 13F Williams Companies COM 969457100 36,109,596 -1,562,358 -4.15 1,012,513 -6.42 6.6316
2019-05-13 2019-03-31 13F Williams Companies COM 969457100 37,671,954 -477,014 -1.25 1,081,939 28.62 6.6859
2019-02-13 2018-12-31 13F Williams Companies COM 969457100 38,148,968 -3,737,689 -8.92 841,185 -26.14 6.1193
2018-12-13 2018-09-30 13F/A-1 Williams Companies COM 969457100 41,886,657 25,063,078 148.98 1,138,898 149.71 6.6439
2018-11-08 2018-09-30 13F Williams Companies COM 969457100 41,886,657 25,063,078 1,138,898
2018-08-07 2018-06-30 13F Williams Companies COM 969457100 16,823,579 2,375,456 16.44 456,087 26.98 2.9277
2018-05-17 2018-03-31 13F/A-1 Williams Companies COM 969457100 14,448,123 -3,010,431 -17.24 359,180 -32.52 2.5219
2018-05-15 2018-03-31 13F Williams Companies COM 969457100 14,448,123 359,180
2018-02-14 2017-12-31 13F Williams Companies COM 969457100 17,458,554 2,167,681 14.18 532,311 16.00 3.4912
2017-11-17 2017-09-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 15,290,873 78,109 0.51 458,879 -0.38 3.0017
2017-11-13 2017-09-30 13F WILLIAMS COS INC DEL COM 969457100 15,290,873 78,109 458,879
2017-11-13 2017-06-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 15,212,764 -155,942 -1.01 460,642 1.29 2.9876
2017-08-01 2017-06-30 13F WILLIAMS COS INC DEL COM 969457100 15,212,764 -155,942 460,642
2017-05-15 2017-03-31 13F WILLIAMS COS INC DEL COM 969457100 15,368,706 -2,095,446 -12.00 454,760 -16.38 2.7885
2017-02-14 2016-12-31 13F WILLIAMS COS INC DEL COM 969457100 17,464,152 -1,166,407 -6.26 543,834 -5.01 3.4948
2016-11-14 2016-09-30 13F WILLIAMS COS INC DEL COM 969457100 18,630,559 4,121,274 28.40 572,517 82.43 3.8271
2016-08-11 2016-06-30 13F WILLIAMS COS INC DEL COM 969457100 14,509,285 2,965,439 25.69 313,836 69.17 2.1944
2016-05-13 2016-03-31 13F WILLIAMS COS INC DEL COM 969457100 11,543,846 1,516,078 15.12 185,510 -22.16 1.4854
2016-02-12 2015-12-31 13F WILLIAMS COS INC DEL COM 969457100 10,027,768 860,771 9.39 238,334 -29.45 2.0088
2015-11-16 2015-09-30 13F WILLIAMS COS INC DEL COM 969457100 9,166,997 1,156,325 14.43 337,804 -26.52 2.6609
2015-08-13 2015-06-30 13F WILLIAMS COS INC DEL COM 969457100 8,010,672 56,005 0.70 459,732 14.24 2.8075
2015-05-08 2015-03-31 13F WILLIAMS COS INC DEL COM 969457100 7,954,667 279,606 3.64 402,427 16.67 2.3885
2015-02-10 2014-12-31 13F WILLIAMS COS INC DEL COM 969457100 7,675,061 -665,338 -7.98 344,917 -25.28 2.0505
2014-11-13 2014-09-30 13F WILLIAMS COS INC DEL COM 969457100 8,340,399 497,909 6.35 461,641 1.12 2.5500
2014-08-13 2014-06-30 13F WILLIAMS COS INC DEL COM 969457100 7,842,490 641,574 8.91 456,511 56.23 2.4641
2014-05-09 2014-03-31 13F WILLIAMS COS INC DEL COM 969457100 7,200,916 335,820 4.89 292,213 10.36 1.9399
2014-02-11 2013-12-31 13F WILLIAMS COS INC DEL COM 969457100 6,865,096 532,355 8.41 264,787 15.00 1.9215
2013-11-12 2013-09-30 13F WILLIAMS COS INC DEL COM 969457100 6,332,741 -1,462,079 -18.76 230,258 -9.02 1.8064
2013-08-13 2013-06-30 13F WILLIAMS COS INC DEL COM 969457100 7,794,820 7,794,820 253,098 2.1096
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.