Southwest Gas Holdings, Inc.
US ˙ NYSE ˙ US8448951025

SecuritySWX / Southwest Gas Holdings, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership918 shares
Latest Disclosed Value $ 73,530
Parallel Advisors, LLC ownership in SWX / Southwest Gas Holdings, Inc.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 918 shares of Southwest Gas Holdings, Inc. (US:SWX) valued at $73,458 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 912 shares of Southwest Gas Holdings, Inc.. This represents a change in shares of 0.66% during the quarter. The current value of the position is $78,700 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (SWX) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

SWX / Southwest Gas Holdings, Inc. Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 918 6 0.66 74 2.82 0.0013
2025-11-13 2025-09-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 912 32 3.64 72 9.23 0.0013
2025-07-08 2025-06-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 880 152 20.88 65 25.00 0.0013
2025-04-08 2025-03-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 728 16 2.25 52 4.00 0.0012
2025-02-10 2024-12-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 712 0 0.00 50 -3.85 0.0011
2024-11-13 2024-09-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 712 -322 -31.14 53 -27.78 0.0012
2024-08-08 2024-06-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,034 24 2.38 73 -5.26 0.0019
2024-05-06 2024-03-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,010 216 27.20 77 52.00 0.0021
2024-02-12 2023-12-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 794 -250 -23.95 50 -20.63 0.0015
2024-05-20 2023-09-30 13F/A-1 SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,044 47 4.71 63 0.00 0.0021
2023-11-14 2023-09-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,044 47 63 0.0021
2024-05-20 2023-06-30 13F/A-1 SOUTHWEST GAS HLDGS INC COM Stock 844895102 997 279 38.86 63 43.18 0.0020
2023-08-04 2023-06-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 997 279 63 0.0020
2024-05-20 2023-03-31 13F/A-1 SOUTHWEST GAS HLDGS INC COM Stock 844895102 718 -285 -28.41 45 -29.03 0.0015
2023-04-25 2023-03-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 718 -285 45 0.0015
2023-02-06 2022-12-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,003 -1,286 -56.18 62 -61.25 0.0027
2022-11-10 2022-09-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 2,289 37 1.64 160 -18.37 0.0074
2022-08-01 2022-06-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 2,252 737 48.65 196 63.33 0.0090
2022-04-28 2022-03-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,515 331 27.96 120 44.58 0.0048
2022-01-20 2021-12-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,184 -88 -6.92 83 -2.35 0.0031
2021-11-02 2021-09-30 13F/A-1 SOUTHWEST GAS HLDGS INC COM Stock 844895102 1,272 317 33.19 85 34.92 0.0034
2021-08-06 2021-06-30 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 955 58 6.47 63 1.61 0.0027
2021-04-23 2021-03-31 13F SOUTHWEST GAS HLDGS INC COM Stock 844895102 897 216 31.72 62 51.22 0.0029
2021-02-02 2020-12-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 681 -313 -31.49 41 -34.92 0.0022
2020-10-27 2020-09-30 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 994 -94 -8.64 63 -16.00 0.0039
2020-07-16 2020-06-30 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 1,088 118 12.16 75 11.94 0.0049
2020-04-27 2020-03-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 970 -186 -16.09 67 -23.86 0.0054
2020-01-30 2019-12-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 1,156 813 237.03 88 183.87 0.0066
2019-11-01 2019-09-30 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 343 100 41.15 31 40.91 0.0027
2019-08-05 2019-06-30 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 243 0 0.00 22 10.00 0.0021
2019-05-01 2019-03-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 243 0 0.00 20 11.11 0.0022
2019-02-05 2018-12-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 243 0 0.00 18 -5.26 0.0025
2018-11-01 2018-09-30 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 243 0 0.00 19 5.56 0.0024
2018-07-30 2018-06-30 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 243 243 18 0.0026
2018-05-08 2018-03-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 0 -21 -100.00 0 -100.00
2018-02-13 2017-12-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 21 0 0.00 2 0.00 0.0003
2017-11-15 2017-09-30 13F/A-1 SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 21 -21 -50.00 2 -33.33 0.0003
2017-08-07 2017-06-30 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 42 3 7.69 3 0.00 0.0006
2017-05-12 2017-03-31 13F/A-1 SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 39 39 3 0.0006
2017-05-12 2017-03-31 13F SOUTHWEST GAS HOLDINGS INC COM Stock 844895102 39 3
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F SOUTHWEST GAS HLDGS INC COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F SOUTHWEST GAS HLDGS INC COM Stock Call 955 63 n/a n/a n/a
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.