United States

Top 22 largest US Companies in the Utilities—Diversified industry by Market Cap

This is the list of the largest public listed companies in the Utilities—Diversified industry from the United States by market capitalization with links to their reference stock.

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Top Utilities—Diversified Companies from the United States as of Jul. 01, 2025

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Rank Company Market Cap (USD) Country Sector Industry
1 PacifiCorp $65.07 B

(Jan. 1, 2025)

 United States US Utilities US Utilities—Diversified
2 Sempra Energy $48.99 B United States US Utilities US Utilities—Diversified
3 Dominion Energy, Inc. $48.97 B United States US Utilities US Utilities—Diversified
4 Sempra $46.56 B

(July 1, 2023)

 United States US Utilities US Utilities—Diversified
5 Exelon Corporation $43.33 B United States US Utilities US Utilities—Diversified
6 Public Service Enterprise Group Incorporated $40.53 B United States US Utilities US Utilities—Diversified
7 Entergy Corporation $36.56 B United States US Utilities US Utilities—Diversified
8 FirstEnergy Corp. $23.02 B United States US Utilities US Utilities—Diversified
9 The AES Corporation $8.20 B United States US Utilities US Utilities—Diversified
10 South Jersey Industries, Inc. $4.33 B

(Jan. 1, 2023)

 United States US Utilities US Utilities—Diversified
11 Black Hills Corporation $4.13 B United States US Utilities US Utilities—Diversified
12 ALLETE, Inc. $3.76 B United States US Utilities US Utilities—Diversified
13 Otter Tail Corporation $3.34 B United States US Utilities US Utilities—Diversified
14 MGE Energy, Inc. $3.29 B United States US Utilities US Utilities—Diversified
15 NorthWestern Corporation $3.19 B United States US Utilities US Utilities—Diversified
16 Avista Corporation $3.09 B United States US Utilities US Utilities—Diversified
17 Unitil Corporation $854.0 M United States US Utilities US Utilities—Diversified
18 Montauk Renewables, Inc. $386.0 M United States US Utilities US Utilities—Diversified
19 Orbital Energy Group, Inc. United States US Utilities US Utilities—Diversified
20 Commerce Energy Group, Inc. United States US Utilities US Utilities—Diversified
21 ForceField Energy, Inc. United States US Utilities US Utilities—Diversified
22 Euro Solar Parks, Inc. United States US Utilities US Utilities—Diversified

Top Utilities—Diversified Companies from the United States as of Jul. 01, 2025

1. PacifiCorp

Company Profile: PacifiCorp
Market Cap (USD): $65.07 B (Jan. 1, 2025)
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

2. Sempra Energy

Company Profile: Sempra Energy
Market Cap (USD): $48.99 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

3. Dominion Energy, Inc.

Company Profile: Dominion Energy, Inc.
Market Cap (USD): $48.97 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

4. Sempra

Company Profile: Sempra
Market Cap (USD): $46.56 B (July 1, 2023)
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

5. Exelon Corporation

Company Profile: Exelon Corporation
Market Cap (USD): $43.33 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

6. Public Service Enterprise Group Incorporated

Company Profile: Public Service Enterprise Group Incorporated
Market Cap (USD): $40.53 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

7. Entergy Corporation

Company Profile: Entergy Corporation
Market Cap (USD): $36.56 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

8. FirstEnergy Corp.

Company Profile: FirstEnergy Corp.
Market Cap (USD): $23.02 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

9. The AES Corporation

Company Profile: The AES Corporation
Market Cap (USD): $8.20 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

10. South Jersey Industries, Inc.

Company Profile: South Jersey Industries, Inc.
Market Cap (USD): $4.33 B (Jan. 1, 2023)
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

11. Black Hills Corporation

Company Profile: Black Hills Corporation
Market Cap (USD): $4.13 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

12. ALLETE, Inc.

Company Profile: ALLETE, Inc.
Market Cap (USD): $3.76 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

13. Otter Tail Corporation

Company Profile: Otter Tail Corporation
Market Cap (USD): $3.34 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

14. MGE Energy, Inc.

Company Profile: MGE Energy, Inc.
Market Cap (USD): $3.29 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

15. NorthWestern Corporation

Company Profile: NorthWestern Corporation
Market Cap (USD): $3.19 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

16. Avista Corporation

Company Profile: Avista Corporation
Market Cap (USD): $3.09 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

17. Unitil Corporation

Company Profile: Unitil Corporation
Market Cap (USD): $854.0 M
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

18. Montauk Renewables, Inc.

Company Profile: Montauk Renewables, Inc.
Market Cap (USD): $386.0 M
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

19. Orbital Energy Group, Inc.

Company Profile: Orbital Energy Group, Inc.
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

20. Commerce Energy Group, Inc.

Company Profile: Commerce Energy Group, Inc.
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

21. ForceField Energy, Inc.

Company Profile: ForceField Energy, Inc.
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

22. Euro Solar Parks, Inc.

Company Profile: Euro Solar Parks, Inc.
Country: United States
Sector: US Utilities
Industry: US Utilities—Diversified

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