# EDGAR Filing Document

**Accession Number:** 0001692115
**File Stem:** 0001193125-26-047540
**Filing Date:** 2026-2
**Character Count:** 5463
**Document Hash:** debc1435e4da1152f693931f68ca0221
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-047540.hdr.sgml**: 20260212

**ACCESSION NUMBER**: 0001193125-26-047540

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260211

**ITEM INFORMATION**: Termination of a Material Definitive Agreement

**FILED AS OF DATE**: 20260212

**DATE AS OF CHANGE**: 20260212

**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:** 26623203

**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 11, 2026

## SOUTHWEST GAS HOLDINGS, INC.

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

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-37976** | **81-3881866** |
| **(State or other jurisdiction of<br>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** |
| **(Address of principal executive offices)** |

---

#### 89193-8510

#### (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 1.02** | **Termination of a Material Definitive Agreement.**  |

---

On February 11, 2026, Southwest Gas Holdings, Inc. (the "Company") and Carl C. Icahn and the persons and entities listed in the Cooperation Agreement (as defined below) (collectively, the "Icahn Group" and together with the Company, the "Parties") mutually agreed to terminate that certain Amended and Restated Cooperation Agreement, dated as of October 14, 2025, by and between the Parties (the "Cooperation Agreement"). As a result of such termination, all rights and obligations of the Parties thereunder were terminated, and the Cooperation Agreement is of no further force or effect. Notwithstanding the termination of the Cooperation Agreement, Andrew W. Evans, Henry P. Linginfelter and Ruby Sharma, each of whom was nominated as a director pursuant to the terms of the Cooperation Agreement, will remain on the Company's board of directors, and, subject to the Company's standard evaluation process of director candidates, the Company expects to renominate each of them for reelection at the Company's 2026 annual meeting of stockholders.

The foregoing description of the Cooperation Agreement is qualified in its entirety by reference to the full text of the Cooperation Agreement, a copy of which was previously filed by the Company with the U.S. Securities and Exchange Commission as Exhibit 10.1 to the Current Report on Form 8-K dated October 14, 2025 and is incorporated by reference herein.

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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 12, 2026 | /s/ Catherine M. Mazzeo |
|  | Catherine M. Mazzeo |
|  | Senior Vice President/Chief Legal, Safety & Compliance Officer and Corporate Secretary |

---