# EDGAR Filing Document

**Accession Number:** 0001692115
**File Stem:** 0001193125-26-045442
**Filing Date:** 2026-2
**Character Count:** 5476
**Document Hash:** 4ae4412b51997ff22a010bf56d21fb8b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-045442.hdr.sgml**: 20260211

**ACCESSION NUMBER**: 0001193125-26-045442

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260206

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Regulation FD Disclosure

**FILED AS OF DATE**: 20260211

**DATE AS OF CHANGE**: 20260211

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Southwest Gas Holdings, Inc.
- **CENTRAL INDEX KEY:** 0001692115
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATURAL GAS TRANSMISSION & DISTRIBUTION [4923]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 813881866
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37976
- **FILM NUMBER:** 26618240

**BUSINESS ADDRESS:**
- **STREET 1:** C/O SOUTHWEST GAS CORPORATION
- **STREET 2:** 8360 S. DURANGO DRIVE
- **CITY:** LAS VEGAS
- **STATE:** NV
- **ZIP:** 89113
- **BUSINESS PHONE:** 702-876-7237

**MAIL ADDRESS:**
- **STREET 1:** C/O SOUTHWEST GAS CORPORATION
- **STREET 2:** 8360 S. DURANGO DRIVE
- **CITY:** LAS VEGAS
- **STATE:** NV
- **ZIP:** 89113

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### Form 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported) February 6, 2026

## SOUTHWEST GAS HOLDINGS, INC.

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-37976** | **81-3881866** |
| **(State or other jurisdiction<br>of incorporation or organization)** | **(Commission**<br> **File Number)** | **(I.R.S. Employer<br>Identification No.)** |

---

#### 8360 S. Durango Drive

#### Post Office Box 98510

---

| | |
|:---|:---|
| **Las Vegas, Nevada** | **89193-8510** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

#### Registrant's telephone number, including area code: (702) 876-7237

#### Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>Symbol** | **Name of each exchange<br>on which registered** |
| Southwest Gas Holdings, Inc. Common Stock, $1 Par Value | SWX | New York Stock Exchange |

---

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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#### Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
On February 6, 2026, Anne L. Mariucci notified Southwest Gas Holdings, Inc. (the "Company") that she will not stand for re-election to the Company's Board of Directors (the "Board") at the 2026 Annual Meeting of Stockholders (the "2026 Annual Meeting") and that she will retire from the Board at the conclusion of the 2026 Annual Meeting. The Company is extremely grateful to Ms. Mariucci for her nearly 20 years of service on the Board, including her leadership as Chair of the Strategic Transactions Committee. There are no disagreements between the Company and Ms. Mariucci with respect to any matter relating to the Company's operations, policies or practices that resulted in Ms. Mariucci's decision not to stand for re-election and to retire from the Board at the conclusion of the 2026 Annual Meeting.

#### Item 7.01 Regulation FD Disclosure.
On February 6, 2026, Ms. Mariucci delivered the following notice to the Company: "I am retiring from the Board, effective with the 2026 Annual Meeting and will not stand for election at the 2026 Annual Meeting. The Company is in a strong position, with exciting opportunities ahead. I have no disagreements with the Company and/or its accounting or practices."

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#### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | |
|:---|:---|
|  | SOUTHWEST GAS HOLDINGS, INC. |
| February 11, 2026 | /s/ Catherine M. Mazzeo |
|  | Catherine M. Mazzeo |
|  | Senior Vice President/Chief Legal, Safety & Compliance Officer and Corporate Secretary |

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