Southwest Airlines Co.
US ˙ NYSE ˙ US8447411088

SecurityLUV / Southwest Airlines Co.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership141,568 shares
Latest Disclosed Value $ 5,319
Natixis Advisors, L.p. reports 12.85% increase in ownership of LUV / Southwest Airlines Co.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 141,568 shares of Southwest Airlines Co. (US:LUV) valued at $5,318,710 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 125,448 shares of Southwest Airlines Co.. This represents a change in shares of 12.85% during the quarter. The current value of the position is $5,785,884 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)
2026-05-13 2026-03-31 13F SOUTHWEST AIRLS COM 844741108 141,568 16,120 12.85 5 0.00 0.0074
2026-02-10 2025-12-31 13F SOUTHWEST AIRLS COM 844741108 125,448 -11,594 -8.46 5 25.00 0.0073
2025-11-13 2025-09-30 13F SOUTHWEST AIRLS CO COM 844741108 137,042 25,305 22.65 4 33.33 0.0064
2025-08-13 2025-06-30 13F SOUTHWEST AIRLS COM 844741108 111,737 -126,638 -53.13 4 -62.50 0.0058
2025-05-08 2025-03-31 13F SOUTHWEST AIRLS COM 844741108 238,375 110,016 85.71 8 100.00 0.0148
2025-02-10 2024-12-31 13F SOUTHWEST AIRLS COM 844741108 128,359 63,051 96.54 4 300.00 0.0081
2024-11-06 2024-09-30 13F SOUTHWEST AIRLS COM 844741108 65,308 -7,153 -9.87 2 -50.00 0.0038
2024-08-01 2024-06-30 13F SOUTHWEST AIRLS COM 844741108 72,461 27,314 60.50 2 100.00 0.0045
2024-04-25 2024-03-31 13F SOUTHWEST AIRLS COM 844741108 45,147 4,458 10.96 1 0.00 0.0030
2024-02-06 2023-12-31 13F SOUTHWEST AIRLS COM 844741108 40,689 2,471 6.47 1 0.00 0.0031
2023-11-13 2023-09-30 13F SOUTHWEST AIRLS COM 844741108 38,218 -27,177 -41.56 1 -50.00 0.0032
2023-08-15 2023-06-30 13F SOUTHWEST AIRLS COM 844741108 65,395 34,125 109.13 2 100.00 0.0073
2023-05-11 2023-03-31 13F SOUTHWEST AIRLS COM 844741108 31,270 -27,986 -47.23 1 0.00 0.0035
2023-01-27 2022-12-31 13F SOUTHWEST AIRLS COM 844741108 59,256 -43,110 -42.11 2 -99.97 0.0075
2022-11-14 2022-09-30 13F SOUTHWEST AIRLINES COM 844741108 102,366 3,008 3.03 3,157 -12.04 0.0134
2022-08-12 2022-06-30 13F SOUTHWEST AIRLS COM 844741108 99,358 -25,362 -20.34 3,589 -37.17 0.0158
2022-05-12 2022-03-31 13F SOUTHWEST AIRLS COM 844741108 124,720 38,984 45.47 5,712 55.51 0.0218
2022-02-08 2021-12-31 13F SOUTHWEST AIRLS COM 844741108 85,736 -102,337 -54.41 3,673 -62.03 0.0140
2021-11-15 2021-09-30 13F SOUTHWEST AIRLS COM 844741108 188,073 -12,087 -6.04 9,673 -8.97 0.0398
2021-08-12 2021-06-30 13F SOUTHWEST AIRLS COM 844741108 200,160 4,332 2.21 10,626 -11.13 0.0496
2021-05-05 2021-03-31 13F SOUTHWEST AIRLS COM 844741108 195,828 9,662 5.19 11,957 37.80 0.0624
2021-02-12 2020-12-31 13F SOUTHWEST AIRLS COM 844741108 186,166 9,828 5.57 8,677 31.21 0.0500
2020-11-12 2020-09-30 13F SOUTHWEST AIRLS COM 844741108 176,338 -34,852 -16.50 6,613 -8.39 0.0416
2020-08-11 2020-06-30 13F SOUTHWEST AIRLS COM 844741108 211,190 17,906 9.26 7,219 4.88 0.0479
2020-04-27 2020-03-31 13F SOUTHWEST AIRLS COM 844741108 193,284 41,305 27.18 6,883 -16.10 0.0561
2020-02-10 2019-12-31 13F SOUTHWEST AIRLS COM 844741108 151,979 2,802 1.88 8,204 1.82 0.0579
2019-11-12 2019-09-30 13F SOUTHWEST AIRLS COM 844741108 149,177 8,166 5.79 8,057 12.53 0.0639
2019-08-12 2019-06-30 13F SOUTHWEST AIRLS COM 844741108 141,011 15,043 11.94 7,160 9.50 0.0585
2019-05-15 2019-03-31 13F/A-1 SOUTHWEST AIRLS COM 844741108 125,968 -4,455 -3.42 6,539 7.89 0.0572
2019-05-15 2019-03-31 13F SOUTHWEST AIRLS COM 844741108 125,968 -4,455 6,539
2019-02-13 2018-12-31 13F/A-1 SOUTHWEST AIRLS COM 844741108 130,423 646 0.50 6,061 -25.21 0.0598
2019-02-13 2018-12-31 13F SOUTHWEST AIRLS COM 844741108 130,423 646 6,061
2018-11-13 2018-09-30 13F SOUTHWEST AIRLS COM 844741108 129,777 -2,532 -1.91 8,104 20.40 0.0713
2018-08-14 2018-06-30 13F/A-1 SOUTHWEST AIRLS COM 844741108 132,309 22,423 20.41 6,731 6.94 0.0643
2018-08-14 2018-06-30 13F SOUTHWEST AIRLS COM 844741108 132,309 6,731
2018-05-10 2018-03-31 13F SOUTHWEST AIRLS COM 844741108 109,886 3,630 3.42 6,294 -9.49 0.0621
2018-02-14 2017-12-31 13F SOUTHWEST AIRLS COM 844741108 106,256 4,015 3.93 6,954 21.51 0.0708
2017-11-14 2017-09-30 13F SOUTHWEST AIRLS COM 844741108 102,241 2,147 2.14 5,723 -7.99 0.0605
2017-07-27 2017-06-30 13F SOUTHWEST AIRLS COM 844741108 100,094 6,348 6.77 6,220 23.41 0.0673
2017-05-12 2017-03-31 13F SOUTHWEST AIRLS COM 844741108 93,746 5,272 5.96 5,040 14.29 0.0558
2017-02-07 2016-12-31 13F SOUTHWEST AIRLS COM 844741108 88,474 4,493 5.35 4,410 35.03 0.0530
2016-11-04 2016-09-30 13F SOUTHWEST AIRLS COM 844741108 83,981 -21,540 -20.41 3,266 -21.05 0.0423
2016-08-01 2016-06-30 13F SOUTHWEST AIRLS COM 844741108 105,521 10,794 11.39 4,137 -2.52 0.0572
2016-05-06 2016-03-31 13F SOUTHWEST AIRLS COM 844741108 94,727 -24,613 -20.62 4,244 -17.42 0.0635
2016-02-12 2015-12-31 13F SOUTHWEST AIRLS COM 844741108 119,340 -20,884 -14.89 5,139 -3.66 0.0842
2015-11-12 2015-09-30 13F SOUTHWEST AIRLS COM 844741108 140,224 41,704 42.33 5,334 63.62 0.0925
2015-08-14 2015-06-30 13F SOUTHWEST AIRLS COM 844741108 98,520 26,487 36.77 3,260 2.16 0.0554
2015-05-15 2015-03-31 13F SOUTHWEST AIRLS COM 844741108 72,033 -10,475 -12.70 3,191 -8.62 0.0560
2015-02-05 2014-12-31 13F SOUTHWEST AIRLS COM 844741108 82,508 5,508 7.15 3,492 34.31 0.0654
2014-11-03 2014-09-30 13F SOUTHWEST AIRLS COM 844741108 77,000 5,879 8.27 2,600 36.13 0.0522
2014-08-13 2014-06-30 13F SOUTHWEST AIRLS COM 844741108 71,121 -777 -1.08 1,910 12.49 0.0274
2014-05-13 2014-03-31 13F SOUTHWEST AIRLS COM 844741108 71,898 48,834 211.73 1,698 290.34 0.0261
2014-02-12 2013-12-31 13F SOUTHWEST AIRLS COM 844741108 23,064 3,618 18.61 435 53.71 0.0071
2013-10-30 2013-09-30 13F SOUTHWEST AIRLS COM 844741108 19,446 3,785 24.17 283 40.10 0.0052
2013-07-19 2013-06-30 13F SOUTHWEST AIRLS COM 844741108 15,661 15,661 202 0.0040
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.