Companies in Transmission System Operators (TSO)
There are 94 companies in Transmission System Operators (TSO) which include TenneT, Terna, Power Grid, California ISO, Maharashtra State Electricity Transmission. 31 companies in Transmission System Operators (TSO) are funded, with 23 having secured Series A funding. United States has the most number of companies in Transmission System Operators (TSO) (19), followed by India
(15), and then United Kingdom (8).
Most number of Transmission System Operators (TSO) startups have been founded by alumni from BITS Pilani and Indian School of Business.
Here is a List of top companies in Transmission System Operators (TSO)

1. TenneT
TenneT operates and maintains the power grid to supply high-voltage electricity of 110kV in Netherlands and Germany. Claims to operate a transmission line of 23500 kilometers serving 42 million residential customers and commercial sites.
Key facts about TenneT
- Founded Year: 1998
- Location: Arnhem (Netherlands)
- Stage: Funding Raised
- Investors: Triodos Investment Management, Rinkelberg Capital and 2 Others
- Latest Funding Round: Conventional Debt, Oct 20, 2022, $*****
- Tracxn Score: 62/100 What is this?
2. Terna
Terna is an electricity transmission grid operator. It operates the high voltage grid, maintains grid infrastructure, plans grid development & grid construction, transmitting, managing and dispatching the Italian electricity system and Europe. Their clientele includes households and businesses. In 2022, the company recorded annual revenues of $4.72B and a net profit of $0.97B.
Key facts about Terna
- Founded Year: 1999
- Location: Rome (Italy)
- Stage: Public
- Investors: Greyrock Investments, Triodos Investment Management and 1 Other
- Latest Funding Round: Grant (prize money), May 01, 2023, $*****
- Tracxn Score: 60/100 What is this?

3. Power Grid
Operator of electric power transmission networks and grid management services. The organization operates and manages electricity transmission infrastructure, supporting reliable power transfer across interconnected networks. It develops transmission projects, provides grid management capabilities, offers transmission consultancy, delivers telecommunications services related to its operations, supports energy efficiency initiatives, and contributes to smart grid implementation. It also manages transmission assets and provides operational monitoring and technical expertise for transmission systems and associated equipment.
Key facts about Power Grid
- Founded Year: 1989
- Location: Gurugram (India)
- Stage: Public
- Investors: Sumitomo Mitsui Banking Corporation, Utilico Emerging Markets Trust and 2 Others
- Latest Funding Round: Conventional Debt, Dec 10, 2018, $*****
- Tracxn Score: 53/100 What is this?
California ISO manages the flow of electricity on high-voltage power lines, operates a wholesale energy market, and oversees infrastructure planning.
Key facts about California ISO
- Founded Year: 1998
- Location: Folsom (United States)
- Stage: Unfunded
- Tracxn Score: 53/100 What is this?
- Competitors Rank: 5 of 73 Competitors
Key facts about Maharashtra State Electricity Transmission
- Founded Year: 2005
- Location: Mumbai (India)
- Stage: Unfunded
- Tracxn Score: 52/100 What is this?
- Competitors Rank: 102 of 2,075 Competitors

