Western Midstream Partners, LP - Limited Partnership
US ˙ NYSE ˙ US9586691035

SecurityWES / Western Midstream Partners, LP - Limited Partnership
InstitutionMorgan Stanley
Latest Disclosed Ownership4,550,365 shares
Latest Disclosed Value $ 187,338,531
Morgan Stanley reports 16.45% decrease in ownership of WES / Western Midstream Partners, LP - Limited Partnership

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 4,550,365 shares of Western Midstream Partners, LP - Limited Partnership (US:WES) valued at $187,338,527 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 5,446,475 shares of Western Midstream Partners, LP - Limited Partnership. This represents a change in shares of -16.45% during the quarter. The current value of the position is $205,175,958 USD.

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 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 4,550,365 -896,110 -16.45 187,339 -12.92 0.0113
2026-05-27 2025-12-31 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 5,446,475 2,696,439 98.05 215,136 99.11 0.0128
2026-02-13 2025-12-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 5,446,475 2,696,439 215,136 0.0128
2026-05-27 2025-09-30 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,750,036 565,585 25.89 108,049 27.81 0.0065
2025-11-14 2025-09-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,750,036 565,585 108,049 0.0065
2025-08-15 2025-06-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,184,451 -667,870 -23.41 84,538 -27.64 0.0055
2025-05-15 2025-03-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,852,321 -827,882 -22.50 116,831 -17.39 0.0084
2025-05-15 2024-12-31 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,680,203 -209,191 -5.38 141,430 -4.96 0.0099
2025-02-14 2024-12-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,680,203 -209,191 141,430 0.0099
2025-05-14 2024-09-30 13F/A-2 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,889,394 620,997 19.00 148,808 14.60 0.0108
2025-02-14 2024-09-30 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,889,394 620,997 148,808 0.0108
2024-11-14 2024-09-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,889,394 620,997 148,808 0.0013
2025-05-14 2024-06-30 13F/A-2 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,268,397 476,067 17.05 129,853 30.81 0.0100
2024-10-17 2024-06-30 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,268,397 476,067 129,853 0.0100
2024-08-14 2024-06-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,268,397 476,067 129,853 0.0100
2024-10-17 2024-03-31 13F/A-2 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,792,330 914,385 48.69 99,267 80.66 0.0080
2024-08-16 2024-03-31 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,792,330 914,385 99,267 0.0009
2024-05-15 2024-03-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,792,330 914,385 99,267 0.0080
2024-08-16 2023-12-31 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,877,945 -220,346 -10.50 54,949 -3.83 0.0048
2024-02-13 2023-12-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,877,945 -220,346 54,949 0.0048
2023-11-15 2023-09-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,098,291 74,670 3.69 57,136 6.47 0.0058
2023-08-14 2023-06-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,023,621 -211,687 -9.47 53,666 -8.96 0.0053
2023-05-15 2023-03-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,235,308 445,312 24.88 58,945 22.65 0.0063
2023-02-14 2022-12-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,789,996 48,221 2.77 48,061 9.67 0.0055
2022-11-14 2022-09-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,741,775 -279,872 -13.84 43,823 -10.83 0.0060
2022-10-27 2022-06-30 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,021,647 -209,401 -9.39 49,147 -12.65 0.0064
2022-08-15 2022-06-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,021,647 -209,401 49,147 0.0013
2022-10-27 2022-03-31 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,231,048 491,521 28.26 56,267 45.24 0.0076
2022-05-13 2022-03-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,231,048 491,521 56,267 0.0076
2022-02-14 2021-12-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,739,527 -359,221 -17.12 38,740 -11.93 0.0048
2021-11-15 2021-09-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,098,748 295,325 16.38 43,989 13.88 0.0059
2021-08-23 2021-06-30 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,803,423 -466,012 -20.53 38,629 -8.44 0.0051
2021-08-16 2021-06-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,803,423 -466,012 38,629 0.0011
2021-05-17 2021-03-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,269,435 -1,488,381 -39.61 42,190 -18.76 0.0062
2021-02-16 2020-12-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,757,816 -560,699 -12.98 51,932 50.32 0.0080
2020-11-13 2020-09-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 4,318,515 1,351,411 45.55 34,547 15.97 0.0067
2020-08-14 2020-06-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,967,104 -8,722,783 -74.62 29,790 -21.35 0.0066
2020-05-26 2020-03-31 13F/A-1 WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 11,689,887 8,011,695 217.82 37,876 -47.70 0.0103
2020-05-15 2020-03-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 11,689,887 8,011,695 37,876 2,909.6664
2020-02-14 2019-12-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 3,678,192 1,540,314 72.05 72,424 36.10 0.0168
2019-11-14 2019-09-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,137,878 -307,863 -12.59 53,212 -29.29 0.0141
2019-08-14 2019-06-30 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 2,445,741 820,262 50.46 75,255 47.63 0.0200
2019-05-15 2019-03-31 13F WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 1,625,479 1,396,748 610.65 50,975 703.64 0.0144
2019-02-14 2018-12-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 228,731 -439,852 -65.79 6,343 -68.32 0.0019
2019-02-14 2018-12-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,017,776 -21,966 42,980 0.0129
2019-04-23 2018-09-30 13F/A-2 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 668,583 124,269 22.83 20,019 2.87 0.0050
2019-04-23 2018-09-30 13F/A-2 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,039,742 -294,553 45,415 0.0114
2018-11-20 2018-09-30 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 668,583 -371,159 20,019 0.0050
2018-11-20 2018-09-30 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,039,742 371,159 45,415 0.0114
2018-11-14 2018-09-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 668,583 124,269 20,019
2018-11-14 2018-09-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,039,742 -294,553 45,415
2019-04-23 2018-06-30 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 544,314 -181,460 -25.00 19,460 -19.04 0.0053
2019-04-23 2018-06-30 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,334,295 -1,097,358 64,566 0.0174
2018-08-14 2018-06-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 544,314 -181,460 19,460
2018-08-14 2018-06-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,334,295 -1,097,358 64,566
2019-04-23 2018-03-31 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 725,774 -701,369 -49.14 24,037 -54.68 0.0067
2019-04-23 2018-03-31 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 2,431,653 -2,351,774 103,757 0.0288
2018-05-14 2018-03-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 725,774 -701,369 24,037
2018-05-14 2018-03-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 2,431,653 -2,351,774 103,757
2019-04-23 2017-12-31 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,427,143 781,529 121.05 53,034 99.48 0.0145
2019-04-23 2017-12-31 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 4,783,427 611,946 230,036 0.0630
2018-02-14 2017-12-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,427,143 781,529 53,034
2018-02-14 2017-12-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 4,783,427 611,946 230,036
2017-11-14 2017-09-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 645,614 -7,277 -1.11 26,586 -5.34 0.0080
2017-11-14 2017-09-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 4,171,481 2,376,351 213,913 0.0641
2017-08-11 2017-06-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 652,891 -967,648 -59.71 28,086 -62.40 0.0085
2017-08-11 2017-06-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,795,130 346,790 100,421 0.0303
2017-05-22 2017-03-31 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,620,539 -688,002 -29.80 74,706 -23.59 0.0230
2017-05-22 2017-03-31 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,448,340 167,704 87,553 0.0269
2017-05-12 2017-03-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,620,539 74,706
2017-05-12 2017-03-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,448,340 87,553
2017-02-22 2016-12-31 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 2,308,541 -377,870 -14.07 97,767 -14.35 0.0320
2017-02-22 2016-12-31 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,280,636 -249,615 75,250 0.0246
2017-02-13 2016-12-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 2,308,541 97,767
2017-02-13 2016-12-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,280,636 75,250
2016-11-10 2016-09-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 2,686,411 -1,519,665 -36.13 114,145 -29.05 0.0390
2016-11-10 2016-09-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,530,251 288,593 84,241 0.0288
2016-08-12 2016-06-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 4,206,076 2,640,500 168.66 160,882 188.33 0.0581
2016-08-12 2016-06-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,241,658 -101,489 62,578 0.0226
2016-05-12 2016-03-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,565,576 -326,536 -17.26 55,797 -18.74 0.0215
2016-05-12 2016-03-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,343,147 315,452 58,307 0.0224
2016-02-09 2015-12-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,892,112 -106,776 -5.34 68,665 -12.88 0.0249
2016-02-09 2015-12-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,027,695 -411,629 48,846 0.0177
2016-02-08 2015-09-30 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,998,888 110,774 5.87 78,818 -30.43 0.0291
2016-02-08 2015-09-30 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,439,324 141,897 67,389 0.0249
2015-11-09 2015-09-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,998,888 78,818
2015-11-09 2015-09-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,439,324 67,389
2015-08-12 2015-06-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,888,114 587,029 45.12 113,286 45.12 0.0393
2015-08-12 2015-06-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,297,427 346,902 82,217 0.0285
2015-05-14 2015-03-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,301,085 -75,362 -5.48 78,066 -5.84 0.0288
2015-05-14 2015-03-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 950,525 -69,625 62,592 0.0231
2015-02-13 2014-12-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,376,447 -143,859 -9.46 82,904 -10.52 0.0303
2015-02-13 2014-12-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,020,150 98,526 74,520 0.0272
2014-12-16 2014-09-30 13F/A-1 WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,520,306 274,758 22.06 92,649 51.46 0.0356
2014-12-16 2014-09-30 13F/A-1 WESTERN GAS PARTNERS COM UNIT LP IN 958254104 921,624 80,292 69,121 0.0266
2014-11-14 2014-09-30 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,520,306 92,649
2014-11-14 2014-09-30 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 921,624 69,121
2014-05-13 2014-03-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,245,548 172,618 16.09 61,169 44.30 0.0256
2014-05-13 2014-03-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 841,332 -275,731 55,688 0.0233
2014-02-13 2013-12-31 13F WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 1,072,930 240,886 28.95 42,391 -15.27 0.0180
2014-02-13 2013-12-31 13F WESTERN GAS PARTNERS COM UNIT LP IN 958254104 1,117,063 -204,514 68,911 0.0293
2013-11-13 2013-09-30 13F WESTERN GAS PARTNERSLP COM COM 958254104 832,044 -102,203 -10.94 50,030 -17.47 0.0236
2013-11-13 2013-09-30 13F WESTERN GAS EQUITY PARTNERS COM 95825R103 1,321,577 256,314 49,150 0.0232
2013-08-08 2013-06-30 13F WESTERN GAS PARTNERSLP COM COM 958254104 934,247 934,247 60,623 0.0306
2013-08-08 2013-06-30 13F WESTERN GAS EQUITY PARTNERS COM 95825R103 1,065,263 -256,314 43,856 0.0221
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.