| SUBSIDIARY NAME | STATE OF INCORPORATION OR ORGANIZATION TYPE | ||||||||||
| Southwest Gas Holdings, Inc. | Delaware | ||||||||||
| Southwest Gas Utility Group, Inc. | California | ||||||||||
| Southwest Gas Corporation | California | ||||||||||
| Utility Financial Corp. | Nevada | ||||||||||
| The Southwest Companies | Nevada | ||||||||||
| Southwest Gas Transmission Company | Limited partnership between Southwest Gas Corporation and Utility Financial Corp. | ||||||||||
| Great Basin Gas Transmission Company | Nevada | ||||||||||
| Centuri Group, Inc. | Nevada | ||||||||||
| Centuri Holdings, Inc. | Delaware | ||||||||||
| Centuri U.S. Division, Inc. | Nevada | ||||||||||
| Centuri Oil & Gas Group LLC | Delaware | ||||||||||
| Oil & Gas Division LLC | Delaware | ||||||||||
| NPL Construction Co. | Nevada | ||||||||||
| Southwest Administrators, Inc. | Nevada | ||||||||||
| NPL East LLC | Delaware | ||||||||||
| NPL Great Lakes LLC | Delaware | ||||||||||
| NPL Mid-America LLC | Delaware | ||||||||||
| NPL West LLC | Delaware | ||||||||||
| National Barricade LLC | Nevada | ||||||||||
| Intellichoice Energy, LLC | Delaware | ||||||||||
| Intellichoice Energy of California, LLC | Delaware | ||||||||||
| Centuri Special Purpose Entity, LLC | Delaware | ||||||||||
| Meritus Oil & Gas Division LLC | Delaware | ||||||||||
| Canyon Pipeline Construction, Inc. | Nevada | ||||||||||
| Canyon Traffic Control LLC | Nevada | ||||||||||
| Canyon Special Projects LLC | Nevada | ||||||||||
| New England Utility Constructors, Inc. | Massachusetts | ||||||||||
| Neuco Equipment LLC | Nevada | ||||||||||
| Centuri Power Group LLC | Delaware | ||||||||||
| Meritus Electric T&D Division LLC | Delaware | ||||||||||
| Linetec Services, LLC | Delaware | ||||||||||
| Electric T&D Division LLC | Delaware | ||||||||||
| National Powerline LLC | Delaware | ||||||||||
| Electric T&D Holdings LLC | Delaware | ||||||||||
| Drum Parent LLC | Delaware | ||||||||||
| Riggs Distler & Company, Inc. | Maryland | ||||||||||
| VRO Construction Partners 1, LLC | New Jersey | ||||||||||
| Riggs Gas LLC | Delaware | ||||||||||
| Shelby Mechanical LLC | Delaware | ||||||||||
| Shelby Plumbing, LLC | New Jersey | ||||||||||
| Centuri Services Group LLC | Delaware | ||||||||||
| Services Division LLC | Delaware | ||||||||||
| Meritus Services Division LLC | Delaware | ||||||||||
| Centuri Canada Division Inc. | Ontario, Canada | ||||||||||
| NPL Canada Ltd. | Ontario, Canada | ||||||||||
| W.S. Nicholls Western Construction Ltd. | Federal, Canada | ||||||||||