# EDGAR Filing Document

**Accession Number:** 0001692115
**File Stem:** 0001193125-25-197209
**Filing Date:** 2025-9
**Character Count:** 5535
**Document Hash:** 187eb337cfab86148509d530569cf16c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-197209.hdr.sgml**: 20250905

**ACCESSION NUMBER**: 0001193125-25-197209

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20250903

**ITEM INFORMATION**: Other Events

**FILED AS OF DATE**: 20250905

**DATE AS OF CHANGE**: 20250905

**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:** 251296807

**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) September 3, 2025

## 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 8.01** | **Other Events**  |

---

On September 3, 2025, Southwest Gas Holdings, Inc. (the "Company") entered into an underwriting agreement with J.P. Morgan Securities LLC (the "Underwriter") and Centuri Holdings, Inc. ("Centuri"), pursuant to which the Company agreed to sell 27,362,210 shares (the "Shares") of its holdings of common stock of Centuri, par value $0.01 per share ("Centuri Common Stock"), to the Underwriter (the "Offering"). The price to the public in the Offering was $19.60 per share. The Offering was made under a prospectus supplement specifically relating to the Offering dated September 3, 2025 and related prospectus filed with the Securities and Exchange Commission pursuant to Centuri's effective shelf registration statement on Form S-3, as amended (Registration No. 333-287200).

On September 5, 2025 (the "Closing Date"), the Offering closed, pursuant to which the Company sold a total of 27,362,210 shares of Centuri Common Stock. As of the Closing Date, the Company no longer owns any shares of Centuri Common Stock. Accordingly, the Company no longer has governance rights afforded to it under that certain Separation Agreement, dated as of April 11, 2024, by and between the Company and Centuri, including the right to nominate any of Centuri's directors and any remaining consent rights over certain of Centuri's corporate actions. The Company received net proceeds of approximately $524.8 million in respect of the sale of the Shares, after deducting the Underwriter's discount and commissions. Centuri did not receive any of the proceeds from the sale of the Shares by the Company.

------

#### 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. |
| September 5, 2025 | /s/ Catherine M. Mazzeo |
|  | Catherine M. Mazzeo |
|  | Senior Vice President/Chief Legal, Safety & Compliance Officer and Corporate Secretary |

---