California ISO
Utilities · Folsom, California
Products & Services
About California ISO
The California ISO manages the flow of electricity on high-voltage power lines, operates a wholesale energy market, and oversees infrastructure planning.
Its primary NAICS classification is 221121 (Electric Bulk Power Transmission and Control). California ISO is one of 2,977 Utilities companies listed in California.
Business Contact Information
- Phone
- +1 (916) 3514400
- Website
- www.caiso.com
- facebook.com/164212943604621
- Address
- 250 Outcropping Way, Folsom, California, 95630, United States
Industry & Classification
- Industry
- Utilities
- Sector
- Utilities
- Segment
- Electric Utilities
NAICS Codes
- 22Utilities
- 2211Electric Power Generation, Transmission and Distribution
- 221121Electric Bulk Power Transmission and Control
SIC Codes
- 49Electric, Gas, And Sanitary Services
- 491Electric Services
- 4911Electric Power Distribution
Company Details
- Employees
- 490 (251-500)
- Annual Revenue
- $240.6M ($100M-$250M)
California ISO: frequently asked questions
What does California ISO do?
The California ISO manages the flow of electricity on high-voltage power lines, operates a wholesale energy market, and oversees infrastructure planning.
Where is California ISO located?
California ISO is headquartered at 250 Outcropping Way, Folsom, California, 95630, United States.
How many employees does California ISO have?
California ISO has about 490 employees (the 251-500 range).
What is California ISO's annual revenue?
California ISO's annual revenue is estimated at $240.6M (the $100M-$250M range).
What industry is California ISO in?
California ISO is in the Utilities / Utilities industry, and its primary NAICS code is 221121 (Electric Bulk Power Transmission and Control).
How can I contact California ISO?
Its website is www.caiso.com and its phone number is +1 (916) 3514400.
What companies are similar to California ISO?
Other large utilities companies in California include Pacific Gas and Electric Co, Southern California Edison, Kyushu Electric Power Co. Inc and Sempra Energy.
Largest utilities companies in California
Largest companies in California
Largest utilities companies
Manufacturing sales in California, 2026
In California, Factur's 2026 study counted 98 manufacturing quotes worth $14.7M and 18 purchase orders over 12 months: 18% of quotes became orders, against 21% nationally. See the California data.
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