Southwest Gas Holdings, Inc.
US ˙ NYSE ˙ US8448951025

SecuritySWX / Southwest Gas Holdings, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership47,550 shares
Latest Disclosed Value $ 3,804,947
Sei Investments Co reports 6.88% increase in ownership of SWX / Southwest Gas Holdings, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 47,550 shares of Southwest Gas Holdings, Inc. (US:SWX) valued at $3,804,951 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 44,490 shares of Southwest Gas Holdings, Inc.. This represents a change in shares of 6.88% during the quarter. The current value of the position is $4,218,636 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)
2026-02-13 2025-12-31 13F SOUTHWEST GAS HLDGS COM 844895102 47,550 3,060 6.88 3,805 9.15 0.0038
2025-11-13 2025-09-30 13F SOUTHWEST GAS HLDGS COM 844895102 44,490 -6,100 -12.06 3,485 -7.39 0.0037
2025-08-14 2025-06-30 13F SOUTHWEST GAS HLDGS COM 844895102 50,590 -4,053 -7.42 3,763 -4.08 0.0044
2025-05-14 2025-03-31 13F/A-1 SOUTHWEST GAS HLDGS COM 844895102 54,643 -43,493 -44.32 3,923 -43.46 0.0050
2025-05-13 2025-03-31 13F SOUTHWEST GAS HLDGS COM 844895102 98,126 -10 6,939 0.0075
2025-02-11 2024-12-31 13F SOUTHWEST GAS HLDGS COM 844895102 98,136 -30,568 -23.75 6,939 -26.90 0.0089
2024-11-12 2024-09-30 13F SOUTHWEST GAS HLDGS COM 844895102 128,704 -28,254 -18.00 9,493 -14.06 0.0123
2024-08-13 2024-06-30 13F SOUTHWEST GAS HLDGS COM 844895102 156,958 -14,786 -8.61 11,047 -15.51 0.0157
2024-05-07 2024-03-31 13F SOUTHWEST GAS HLDGS COM 844895102 171,744 -4,555 -2.58 13,075 17.07 0.0192
2024-02-14 2023-12-31 13F SOUTHWEST GAS HLDGS COM 844895102 176,299 -1,549 -0.87 11,169 3.96 0.0179
2023-11-14 2023-09-30 13F SOUTHWEST GAS HLDGS COM 844895102 177,848 4,592 2.65 10,744 -2.58 0.0193
2023-08-11 2023-06-30 13F SOUTHWEST GAS HLDGS COM 844895102 173,256 8,574 5.21 11,028 7.22 0.0192
2023-05-12 2023-03-31 13F SOUTHWEST GAS HLDGS COM 844895102 164,682 43,523 35.92 10,284 37.17 0.0191
2023-02-10 2022-12-31 13F SOUTHWEST GAS HLDGS COM 844895102 121,159 8,431 7.48 7,497 -4.65 0.0167
2022-11-14 2022-09-30 13F SOUTHWEST GAS HLDGS COM 844895102 112,728 -7,754 -6.44 7,863 -25.06 0.0175
2022-08-15 2022-06-30 13F SOUTHWEST GAS HLDGS COM 844895102 120,482 -19,389 -13.86 10,492 -4.17 0.0227
2022-05-13 2022-03-31 13F SOUTHWEST GAS HLDGS COM 844895102 139,871 45,430 48.10 10,948 65.55 0.0220
2022-02-14 2021-12-31 13F SOUTHWEST GAS HLDGS COM 844895102 94,441 41,364 77.93 6,613 86.39 0.0124
2021-11-12 2021-09-30 13F SOUTHWEST GAS HLDGS COM 844895102 53,077 43,846 474.99 3,548 482.59 0.0074
2021-08-06 2021-06-30 13F SOUTHWEST GAS HLDGS COM 844895102 9,231 385 4.35 609 0.16 0.0014
2021-05-12 2021-03-31 13F SOUTHWEST GAS HLDGS COM 844895102 8,846 -73,050 -89.20 608 -87.79 0.0015
2021-02-08 2020-12-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 81,896 -27,298 -25.00 4,979 -27.79 0.0129
2020-12-04 2020-09-30 13F/A-1 SOUTHWEST GAS HOLDINGS COM 844895102 109,194 -10,753 -8.96 6,895 -16.77 0.0200
2020-11-06 2020-09-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 109,194 -10,753 6,895 16,601.6270
2020-08-17 2020-06-30 13F/A-1 SOUTHWEST GAS HOLDINGS COM 844895102 119,947 19,108 18.95 8,284 18.06 0.0257
2020-08-11 2020-06-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 56,341 -44,498 4,278 11,604.3027
2020-05-14 2020-03-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 100,839 44,279 78.29 7,017 63.30 0.0258
2020-02-06 2019-12-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 56,560 3,452 6.50 4,297 -11.07 0.0128
2019-11-12 2019-09-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 53,108 -850 -1.58 4,832 0.00 0.0124
2019-08-14 2019-06-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 53,958 -11,544 -17.62 4,832 -10.27 0.0158
2019-05-15 2019-03-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 65,502 -27,612 -29.65 5,385 -26.79 0.0181
2019-02-13 2018-12-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 93,114 -258 -0.28 7,356 -0.30 0.0262
2018-11-08 2018-09-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 93,372 -32,690 -25.93 7,378 -23.26 0.0267
2018-08-03 2018-06-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 126,062 19,961 18.81 9,614 33.99 0.0327
2018-05-11 2018-03-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 106,101 40,921 62.78 7,175 36.77 0.0275
2018-02-08 2017-12-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 65,180 42,532 187.80 5,246 198.24 0.0182
2017-11-06 2017-09-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 22,648 -7,156 -24.01 1,759 -19.24 0.0063
2017-07-31 2017-06-30 13F SOUTHWEST GAS HOLDINGS COM 844895102 29,804 15,133 103.15 2,178 78.96 0.0087
2017-05-05 2017-03-31 13F SOUTHWEST GAS HOLDINGS COM 844895102 14,671 2,205 17.69 1,217 27.43 0.0053
2017-02-02 2016-12-31 13F SOUTHWEST GAS COM 844895102 12,466 2,434 24.26 955 36.23 0.0046
2016-11-04 2016-09-30 13F SOUTHWEST GAS COM 844895102 10,032 1,757 21.23 701 7.68 0.0036
2016-08-11 2016-06-30 13F SOUTHWEST GAS COM 844895102 8,275 5,737 226.04 651 292.17 0.0039
2016-05-10 2016-03-31 13F/A-1 SOUTHWEST GAS COM 844895102 2,538 -7,454 -74.60 166 -69.87 0.0010
2016-02-03 2015-12-31 13F SOUTHWEST GAS COM 844895102 9,992 7,875 371.99 551 347.97 0.0034
2015-11-02 2015-09-30 13F/A-1 SOUTHWEST GAS COM 844895102 2,117 1,057 99.72 123 119.64 0.0011
2015-10-30 2015-09-30 13F SOUTHWEST GAS COM 844895102 2,117 124
2015-08-07 2015-06-30 13F/A-1 SOUTHWEST GAS COM 844895102 1,060 1,060 0.00 56 0.0005
2015-08-04 2015-06-30 13F SOUTHWEST GAS COM 844895102 1,060 1,060 56 0.0005
2015-05-01 2015-03-31 13F SOUTHWEST GAS COM 844895102 0 -899 -100.00 0 -100.00
2015-02-10 2014-12-31 13F SOUTHWEST GAS COM 844895102 899 899 56 0.0005
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.