Italy

Top 19 largest Italian Companies in the Utilities sector by Market Cap

This is the list of the largest public listed companies in the Utilities sector from Italy by market capitalization with links to their reference stock and industry.

Italy Utilities Sector Analysis
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Top Utilities Companies from Italy as of Jan. 01, 2026

Rank Company Market Cap (USD) Country Sector Industry
1 Enel SpA $106.27 B Italy Italian Utilities Italian Utilities—Diversified
2 Snam S.p.A. $22.25 B Italy Italian Utilities Italian Utilities—Regulated Gas
3 Terna - Rete Elettrica Nazionale Società per Azioni $21.38 B Italy Italian Utilities Italian Utilities—Regulated Electric
4 Edison S.p.A. $13.24 B Italy Italian Utilities Italian Utilities—Regulated Electric
5 Italgas S.p.A. $11.52 B Italy Italian Utilities Italian Utilities—Regulated Gas
6 A2A S.p.A. $8.51 B Italy Italian Utilities Italian Utilities—Diversified
7 Hera S.p.A. $6.95 B Italy Italian Utilities Italian Utilities—Diversified
8 ACEA S.p.A. $5.52 B Italy Italian Utilities Italian Utilities—Diversified
9 Iren SpA $3.91 B Italy Italian Utilities Italian Utilities—Diversified
10 ERG S.p.A. $3.85 B Italy Italian Utilities Italian Utilities—Renewable
11 Falck Renewables S.p.A. $3.12 B

(June 1, 2023)

 Italy Italian Utilities Italian Utilities—Renewable
12 Alerion Clean Power S.p.A. $1.17 B Italy Italian Utilities Italian Utilities—Renewable
13 Ascopiave S.p.A. $836.3 M Italy Italian Utilities Italian Utilities—Regulated Gas
14 Acsm-Agam S.p.A. $401.2 M

(Nov. 1, 2022)

 Italy Italian Utilities Italian Utilities—Diversified
15 Gas Plus S.p.A. $348.0 M Italy Italian Utilities Italian Utilities—Regulated Gas
16 Seri Industrial S.p.A. $174.3 M Italy Italian Utilities Italian Utilities—Renewable
17 eVISO S.p.A. $61.9 M

(May 1, 2023)

 Italy Italian Utilities Italian Utilities—Regulated Electric
18 Innovatec S.p.A. $26.6 M Italy Italian Utilities Italian Utilities—Regulated Electric
19 algoWatt S.p.A. Italy Italian Utilities Italian Utilities—Renewable

Top Utilities Companies from Italy as of Jan. 01, 2026

1. Enel SpA

Company Profile: Enel SpA
Market Cap (USD): $106.27 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Diversified

2. Snam S.p.A.

Company Profile: Snam S.p.A.
Market Cap (USD): $22.25 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Gas

3. Terna - Rete Elettrica Nazionale Società per Azioni

Company Profile: Terna - Rete Elettrica Nazionale Società per Azioni
Market Cap (USD): $21.38 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Electric

4. Edison S.p.A.

Company Profile: Edison S.p.A.
Market Cap (USD): $13.24 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Electric

5. Italgas S.p.A.

Company Profile: Italgas S.p.A.
Market Cap (USD): $11.52 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Gas

6. A2A S.p.A.

Company Profile: A2A S.p.A.
Market Cap (USD): $8.51 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Diversified

7. Hera S.p.A.

Company Profile: Hera S.p.A.
Market Cap (USD): $6.95 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Diversified

8. ACEA S.p.A.

Company Profile: ACEA S.p.A.
Market Cap (USD): $5.52 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Diversified

9. Iren SpA

Company Profile: Iren SpA
Market Cap (USD): $3.91 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Diversified

10. ERG S.p.A.

Company Profile: ERG S.p.A.
Market Cap (USD): $3.85 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Renewable

11. Falck Renewables S.p.A.

Company Profile: Falck Renewables S.p.A.
Market Cap (USD): $3.12 B (June 1, 2023)
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Renewable

12. Alerion Clean Power S.p.A.

Company Profile: Alerion Clean Power S.p.A.
Market Cap (USD): $1.17 B
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Renewable

13. Ascopiave S.p.A.

Company Profile: Ascopiave S.p.A.
Market Cap (USD): $836.3 M
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Gas

14. Acsm-Agam S.p.A.

Company Profile: Acsm-Agam S.p.A.
Market Cap (USD): $401.2 M (Nov. 1, 2022)
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Diversified

15. Gas Plus S.p.A.

Company Profile: Gas Plus S.p.A.
Market Cap (USD): $348.0 M
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Gas

16. Seri Industrial S.p.A.

Company Profile: Seri Industrial S.p.A.
Market Cap (USD): $174.3 M
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Renewable

17. eVISO S.p.A.

Company Profile: eVISO S.p.A.
Market Cap (USD): $61.9 M (May 1, 2023)
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Electric

18. Innovatec S.p.A.

Company Profile: Innovatec S.p.A.
Market Cap (USD): $26.6 M
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Regulated Electric

19. algoWatt S.p.A.

Company Profile: algoWatt S.p.A.
Country: Italy
Sector: Italian Utilities
Industry: Italian Utilities—Renewable

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