Southwest Airlines Co.
MX ˙ BMV ˙ US8447411088
SecurityMX:LUV / Southwest Airlines Co.
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership29,435 shares
Latest Disclosed Value $ 1,105,873
Winton Capital Group Ltd reports 6.13% increase in ownership of LUV / Southwest Airlines Co.

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 29,435 shares of Southwest Airlines Co. (MX:LUV) valued at $1,105,873 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 27,734 shares of Southwest Airlines Co.. This represents a change in shares of 6.13% 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)
2026-05-12 2026-03-31 13F SOUTHWEST AIRLS COM 844741108 29,435 1,701 6.13 1,106 -3.58 0.0388
2026-02-11 2025-12-31 13F SOUTHWEST AIRLS COM 844741108 27,734 -3,906 -12.35 1,146 13.58 0.0396
2025-11-13 2025-09-30 13F SOUTHWEST AIRLS COM 844741108 31,640 -24,690 -43.83 1,010 -44.77 0.0378
2025-08-14 2025-06-30 13F SOUTHWEST AIRLS COM 844741108 56,330 23,918 73.79 1,827 67.92 0.0934
2025-05-15 2025-03-31 13F SOUTHWEST AIRLS COM 844741108 32,412 -171,157 -84.08 1,088 -84.10 0.0663
2025-02-12 2024-12-31 13F SOUTHWEST AIRLS COM 844741108 203,569 155,741 325.63 6,844 382.92 0.4545
2024-11-12 2024-09-30 13F SOUTHWEST AIRLS COM 844741108 47,828 26,468 123.91 1,417 131.91 0.0993
2024-08-09 2024-06-30 13F SOUTHWEST AIRLS COM 844741108 21,360 -33,993 -61.41 611 -62.17 0.0413
2024-05-14 2024-03-31 13F SOUTHWEST AIRLS COM 844741108 55,353 45,224 446.48 1,616 453.08 0.1141
2024-02-12 2023-12-31 13F SOUTHWEST AIRLS COM 844741108 10,129 -2,054 -16.86 293 -11.25 0.0213
2023-11-13 2023-09-30 13F SOUTHWEST AIRLS COM 844741108 12,183 12,183 330 0.0272
2023-05-12 2023-03-31 13F SOUTHWEST AIRLS COM 844741108 0 -104,207 -100.00 0 -100.00
2023-02-14 2022-12-31 13F SOUTHWEST AIRLS COM 844741108 104,207 11,331 12.20 3,509 22.49 0.2311
2022-11-10 2022-09-30 13F SOUTHWEST AIRLS COM 844741108 92,876 146 0.16 2,864 -14.48 0.1869
2022-08-10 2022-06-30 13F SOUTHWEST AIRLS COM 844741108 92,730 29,800 47.35 3,349 16.20 0.1776
2022-05-11 2022-03-31 13F SOUTHWEST AIRLS COM 844741108 62,930 55,872 791.61 2,882 854.30 0.1512
2022-02-10 2021-12-31 13F SOUTHWEST AIRLS COM 844741108 7,058 -13,859 -66.26 302 -71.93 0.0183
2021-10-28 2021-09-30 13F SOUTHWEST AIRLS COM 844741108 20,917 5,335 34.24 1,076 30.11 0.0603
2021-08-10 2021-06-30 13F SOUTHWEST AIRLS COM 844741108 15,582 6,883 79.12 827 55.74 0.0444
2021-07-21 2021-03-31 13F SOUTHWEST AIRLS COM 844741108 8,699 -3,642 -29.51 531 -7.65 0.0303
2021-02-12 2020-12-31 13F SOUTHWEST AIRLS COM 844741108 12,341 -105,704 -89.55 575 -87.01 0.0415
2020-10-30 2020-09-30 13F SOUTHWEST AIRLS COM 844741108 118,045 118,045 4,427 0.1439
2020-05-11 2020-03-31 13F SOUTHWEST AIRLS COM 844741108 0 -177,819 -100.00 0 -100.00
2020-02-13 2019-12-31 13F SOUTHWEST AIRLS COM 844741108 177,819 -580,314 -76.55 9,599 -76.56 0.1347
2019-11-08 2019-09-30 13F SOUTHWEST AIRLS COM 844741108 758,133 526,391 227.15 40,947 247.95 0.4842
2019-07-08 2019-06-30 13F SOUTHWEST AIRLS COM 844741108 231,742 66,439 40.19 11,768 37.14 0.2287
2019-05-13 2019-03-31 13F SOUTHWEST AIRLS COM 844741108 165,303 -62,245 -27.35 8,581 -18.86 0.1726
2019-02-05 2018-12-31 13F SOUTHWEST AIRLS COM 844741108 227,548 71,310 45.64 10,576 8.39 0.2279
2018-11-02 2018-09-30 13F SOUTHWEST AIRLS COM 844741108 156,238 151,812 3,430.00 9,757 4,236.44 0.2044
2018-08-20 2018-06-30 13F SOUTHWEST AIRLS COM 844741108 4,426 -2,268 -33.88 225 -41.25 0.0057
2018-05-21 2018-03-31 13F SOUTHWEST AIRLS COM 844741108 6,694 -1,363 -16.92 383 -27.32 0.0108
2018-02-13 2017-12-31 13F SOUTHWEST AIRLS COM 844741108 8,057 -8,985 -52.72 527 -44.76 0.0153
2017-11-13 2017-09-30 13F SOUTHWEST AIRLS COM 844741108 17,042 -108,324 -86.41 954 -87.75 0.0304
2017-08-17 2017-06-30 13F SOUTHWEST AIRLS COM 844741108 125,366 -89,780 -41.73 7,790 -32.65 0.2290
2017-05-19 2017-03-31 13F/A-1 SOUTHWEST AIRLS COM 844741108 215,146 -204,343 -48.71 11,566 -44.68 0.3145
2017-05-12 2017-03-31 13F SOUTHWEST AIRLS COM 844741108 278,663 10,837
2017-02-13 2016-12-31 13F SOUTHWEST AIRLS COM 844741108 419,489 140,826 50.54 20,907 92.92 0.6902
2016-11-08 2016-09-30 13F SOUTHWEST AIRLS COM 844741108 278,663 -158,490 -36.26 10,837 -36.78 0.1862
2016-08-12 2016-06-30 13F SOUTHWEST AIRLS COM 844741108 437,153 182,243 71.49 17,141 50.10 0.2832
2016-05-06 2016-03-31 13F SOUTHWEST AIRLS COM 844741108 254,910 -253,998 -49.91 11,420 -47.89 0.1238
2016-02-08 2015-12-31 13F SOUTHWEST AIRLS COM 844741108 508,908 -174,861 -25.57 21,914 -15.75 0.1948
2015-11-10 2015-09-30 13F SOUTHWEST AIRLS COM 844741108 683,769 -244,529 -26.34 26,011 -15.32 0.2058
2015-08-06 2015-06-30 13F SOUTHWEST AIRLS COM 844741108 928,298 -493,200 -34.70 30,717 -51.22 0.2821
2015-05-12 2015-03-31 13F SOUTHWEST AIRLS COM 844741108 1,421,498 207,575 17.10 62,972 22.58 0.5014
2015-03-16 2014-12-31 13F/A-1 SOUTHWEST AIRLS COM 844741108 1,213,923 -1,267,753 -51.08 51,373 -38.70 0.6360
2015-02-13 2014-12-31 13F SOUTHWEST AIRLS COM 844741108 1,309,902 55,435
2014-10-28 2014-09-30 13F SOUTHWEST AIRLS COM 844741108 2,481,676 317,857 14.69 83,806 44.19 0.5994
2014-08-05 2014-06-30 13F SOUTHWEST AIRLS COM 844741108 2,163,819 2,163,819 58,120 0.3962
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.