The Williams Companies, Inc.
MX ˙ BMV ˙ US9694571004
SecurityMX:WMB / The Williams Companies, Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership49,226 shares
Latest Disclosed Value $ 3,582,669
Robeco Institutional Asset Management B.V. reports 43.37% decrease in ownership of WMB / The Williams Companies, Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 49,226 shares of The Williams Companies, Inc. (MX:WMB) valued at $3,582,669 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 86,925 shares of The Williams Companies, Inc.. This represents a change in shares of -43.37% 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)
2026-04-21 2026-03-31 13F WILLIAMS COS COM 969457100 49,226 -37,699 -43.37 3,583 -31.44 0.0051
2026-01-23 2025-12-31 13F WILLIAMS COS COM 969457100 86,925 -136,419 -61.08 5,225 -63.07 0.0074
2025-10-22 2025-09-30 13F WILLIAMS COS COM 969457100 223,344 -1,035,208 -82.25 14,149 -82.10 0.0205
2025-07-18 2025-06-30 13F WILLIAMS COS COM 969457100 1,258,552 646,488 105.62 79,050 116.12 0.1278
2025-04-23 2025-03-31 13F WILLIAMS COS COM 969457100 612,064 -69,406 -10.18 36,577 -0.83 0.0711
2025-01-23 2024-12-31 13F WILLIAMS COS COM 969457100 681,470 188,123 38.13 36,881 63.76 0.0699
2024-10-29 2024-09-30 13F WILLIAMS COS COM 969457100 493,347 134,603 37.52 22,521 47.72 0.0447
2024-07-23 2024-06-30 13F WILLIAMS COS COM 969457100 358,744 -528,569 -59.57 15,247 -55.91 0.0328
2024-04-24 2024-03-31 13F WILLIAMS COS COM 969457100 887,313 -338,117 -27.59 34,579 -18.99 0.0751
2024-02-14 2023-12-31 13F/A-1 WILLIAMS COS COM 969457100 1,225,430 1,058,210 632.83 42,682 657.70 0.1035
2024-02-08 2023-12-31 13F WILLIAMS COS COM 969457100 658,708 491,488 1,225 0.2295
2023-10-24 2023-09-30 13F WILLIAMS COS COM 969457100 167,220 12,008 7.74 5,634 11.24 0.0151
2023-07-24 2023-06-30 13F WILLIAMS COS COM 969457100 155,212 -33,940 -17.94 5,065 -10.34 0.0133
2023-05-04 2023-03-31 13F WILLIAMS COS COM 969457100 189,152 -226,958 -54.54 5,648 -58.74 0.0154
2023-02-07 2022-12-31 13F WILLIAMS COS COM 969457100 416,110 56,536 15.72 13,690 33.00 0.0395
2022-12-01 2022-09-30 13F/A-1 WILLIAMS COS COM 969457100 359,574 6,425 1.82 10,293 -6.61 0.0333
2022-10-27 2022-09-30 13F WILLIAMS COS COM 969457100 359,574 6,425 10,293 0.0328
2022-12-01 2022-06-30 13F/A-1 WILLIAMS COS COM 969457100 353,149 -120,985 -25.52 11,022 -30.43 0.0342
2022-07-27 2022-06-30 13F WILLIAMS COS COM 969457100 353,149 -120,985 11,022 0.0338
2022-12-01 2022-03-31 13F/A-1 WILLIAMS COS COM 969457100 474,134 10,865 2.35 15,842 31.28 0.0373
2022-04-26 2022-03-31 13F WILLIAMS COS COM 969457100 474,134 10,865 15,842 0.0369
2022-12-01 2021-12-31 13F/A-1 WILLIAMS COS COM 969457100 463,269 95,274 25.89 12,067 26.42 0.0257
2022-01-31 2021-12-31 13F WILLIAMS COS COM 969457100 463,269 95,274 12,067 0.0254
2022-12-01 2021-09-30 13F/A-1 WILLIAMS COS COM 969457100 367,995 -96,422 -20.76 9,545 -22.59 0.0212
2021-10-20 2021-09-30 13F WILLIAMS COS COM 969457100 367,995 -96,422 9,545 0.0209
2022-12-01 2021-06-30 13F/A-1 WILLIAMS COS COM 969457100 464,417 -7,998 -1.69 12,331 10.18 0.0273
2021-07-28 2021-06-30 13F WILLIAMS COS COM 969457100 464,417 -7,998 12,331 0.0270
2022-12-01 2021-03-31 13F/A-1 WILLIAMS COS COM 969457100 472,415 106,427 29.08 11,192 52.52 0.0276
2021-04-23 2021-03-31 13F WILLIAMS COS COM 969457100 472,415 106,427 11,192 0.0272
2022-12-01 2020-12-31 13F/A-1 WILLIAMS COS COM 969457100 365,988 -5,265 -1.42 7,338 0.60 0.0193
2021-01-28 2020-12-31 13F WILLIAMS COS COM 969457100 365,988 -5,265 7,338 0.0190
2021-01-19 2020-09-30 13F/A-1 WILLIAMS COS COM 969457100 371,253 293,512 377.55 7,294 393.17 0.0225
2020-10-29 2020-09-30 13F WILLIAMS COS COM 969457100 371,253 293,512 7,294 22,526.2459
2021-01-19 2020-06-30 13F/A-1 WILLIAMS COS COM 969457100 77,741 -37,861 -32.75 1,479 -9.54 0.0050
2020-07-20 2020-06-30 13F WILLIAMS COS COM 969457100 77,741 -37,861 1,479 5,018.5108
2021-01-19 2020-03-31 13F/A-1 WILLIAMS COS COM 969457100 115,602 -15,735 -11.98 1,635 -47.51 0.0066
2020-04-30 2020-03-31 13F WILLIAMS COS COM 969457100 115,602 -15,735 1,635 6,553.4487
2021-01-19 2019-12-31 13F/A-1 WILLIAMS COS INC DEL COM 969457100 131,337 -9,932 -7.03 3,115 -8.38 0.0100
2020-02-06 2019-12-31 13F WILLIAMS COS INC DEL COM 969457100 131,337 -9,932 3,115 9,963.0880
2021-01-19 2019-09-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 141,269 4,002 2.92 3,400 -11.69 0.0120
2019-10-17 2019-09-30 13F WILLIAMS COS INC DEL COM 969457100 141,269 4,002 3,400 11,986.3983
2021-01-19 2019-06-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 137,267 -46,897 -25.46 3,850 -27.21 0.0136
2019-07-19 2019-06-30 13F WILLIAMS COS INC DEL COM 969457100 137,267 -46,897 3,850 13,576.1070
2021-01-19 2019-03-31 13F/A-1 WILLIAMS COS INC DEL COM 969457100 184,164 157,929 601.98 5,289 813.47 0.0194
2019-05-02 2019-03-31 13F WILLIAMS COS INC DEL COM 969457100 184,164 157,929 5,289 19,419.3265
2021-01-19 2018-12-31 13F/A-1 WILLIAMS COS INC DEL COM 969457100 26,235 -9,800 -27.20 579 -40.92 0.0026
2019-02-08 2018-12-31 13F WILLIAMS COS INC DEL COM 969457100 26,235 -9,800 579 2,595.3388
2021-01-19 2018-09-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 36,035 9,800 37.35 980 37.64 0.0039
2018-10-25 2018-09-30 13F WILLIAMS COS INC DEL COM 969457100 36,035 9,800 980
2021-01-19 2018-06-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 26,235 -31,879 -54.86 712 -50.73 0.0032
2018-08-03 2018-06-30 13F WILLIAMS COS INC DEL COM 969457100 26,235 -31,879 712
2021-01-19 2018-03-31 13F/A-1 WILLIAMS COS INC DEL COM 969457100 58,114 -77,886 -57.27 1,445 -65.15 0.0068
2018-05-07 2018-03-31 13F WILLIAMS COS INC DEL COM 969457100 58,114 -77,886 1,445 6,757.5891
2021-01-19 2017-12-31 13F/A-1 WILLIAMS COS INC DEL COM 969457100 136,000 4,146 3.14 4,146 4.80 0.0215
2018-01-25 2017-12-31 13F WILLIAMS COS INC DEL COM 969457100 136,000 4,146 4,146
2021-01-19 2017-09-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 131,854 11,041 9.14 3,956 8.18 0.0246
2017-10-17 2017-09-30 13F WILLIAMS COS INC DEL COM 969457100 131,854 11,041 3,956 24,508.8078
2021-01-19 2017-06-30 13F/A-1 WILLIAMS COS INC DEL COM 969457100 120,813 51,590 74.53 3,657 78.56 0.0236
2017-08-07 2017-06-30 13F WILLIAMS COS INC DEL COM 969457100 120,813 51,590 3,657 23,810.0152
2021-01-19 2017-03-31 13F/A-1 WILLIAMS COS INC DEL COM 969457100 69,223 37,688 119.51 2,048 108.34 0.0136
2017-05-15 2017-03-31 13F WILLIAMS COS INC DEL COM 969457100 69,223 37,688 2,048 13,602.6923
2017-02-09 2016-12-31 13F WILLIAMS COS INC DEL COM 969457100 31,535 -20,009 -38.82 983 -37.94 0.0077
2016-11-07 2016-09-30 13F WILLIAMS COS INC DEL COM 969457100 51,544 51,544 0.00 1,584 0.0117
2016-07-22 2016-06-30 13F WILLIAMS COS INC DEL COM 969457100 0 -45,800 -100.00 0 -100.00
2016-05-16 2016-03-31 13F WILLIAMS COS INC DEL COM 969457100 45,800 0 0.00 737 -37.38 0.0059
2016-02-08 2015-12-31 13F WILLIAMS COS INC DEL COM 969457100 45,800 15,602 51.67 1,177 5.75 0.0101
2015-11-12 2015-09-30 13F WILLIAMS COS INC DEL COM 969457100 30,198 -5,190 -14.67 1,113 -45.20 0.0085
2015-08-17 2015-06-30 13F WILLIAMS COS INC DEL COM 969457100 35,388 11,583 48.66 2,031 68.69 0.0154
2015-04-24 2015-03-31 13F WILLIAMS COS INC DEL COM 969457100 23,805 0 0.00 1,204 12.63 0.0091
2015-02-12 2014-12-31 13F WILLIAMS COS INC DEL COM 969457100 23,805 -3,511 -12.85 1,069 -29.30 0.0077
2014-11-10 2014-09-30 13F WILLIAMS COS INC DEL COM 969457100 27,316 552 2.06 1,512 -2.95 0.0108
2014-08-13 2014-06-30 13F WILLIAMS COS INC DEL COM 969457100 26,764 5,725 27.21 1,558 82.44 0.0111
2014-05-07 2014-03-31 13F WILLIAMS COS INC DEL COM 969457100 21,039 1,202 6.06 854 11.63 0.0066
2014-02-04 2013-12-31 13F WILLIAMS COS INC DEL COM 969457100 19,837 152 0.77 765 6.84 0.0064
2013-11-12 2013-09-30 13F WILLIAMS COS INC DEL COM 969457100 19,685 0 0.00 716 12.05 0.0070
2013-08-27 2013-06-30 13F Williams Cos COM 969457100 19,685 19,685 639 0.0065
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.