Connecticut Top Companies List by Market Cap as of August 2026

Raytheon Technologies is USA based aerospace and defense sector multi-national company. Raytheon Technologies serves customers in the commercial aerospace, defense and building industries, Elevators, Escalators. Headquarters is in USA.

Raytheon Technologies Business Segments List:

Raytheon Technologies operations are classified into four principal business segments:

Amphenol is one of the largest manufacturers of interconnect products in the world. The Company designs, manufactures and markets electrical, electronic and fiber optic connectors, coaxial and flat-ribbon cable, and interconnect systems. Headquarters is in Connecticut, USA.

Booking Holdings Inc is an online travel and related services. Headquarters is in USA.

Booking Holdings is the provider of online travel & related services, provided to consumers and local partners in more than 220 countries and territories through six primary brands: Booking.com, Priceline, Agoda, KAYAK, Rentalcars.com and OpenTable.

The Cigna Group is Insurance and Healthcare company with headquarters is in Connecticut, USA. They have more than 180 million customer and patient relationships in more than 30 countries and jurisdictions.

As on 2022, The Cigna Group has 71,300 employees.

United Rentals is an equipment rental company operating a network. The Company serves the construction industry, industrial and commercial concerns, sales, servicing, homeowners, and other individuals. The headquarters is in USA.

As on 2022, UNITED RENTALS has 24,700 employees.

UNITED RENTALS annual revenue generated for period ending Dec-2022 was 11,642 million USD.

UNITED RENTALS annual net income generated for period ending Dec-2022 was 2,105 million USD.

Alexion Pharmaceuticals is USA based pharmaceutical company with headquarters is in Connecticut, USA.

Astrazeneca acquired Alexion Pharmaceuticals for 39 Billion USD.

Interactive Brokers Group provides electronic trading technology that delivers real advantages to traders, investors and institutions worldwide.

Headquarters is in Connecticut, USA.

They are one of the largest US electronic brokers based on daily average revenue trades executing 1,454,000 trades per day.

Company has access over 125 markets in 31 countries.

Hartford Financial Services provides insurance and investment services and headquarters is in Connecticut, USA.

As on 2022, Hartford Financial Services has 18,800 employees.

Hartford Financial Services annual revenue generated for period ending Dec-2022 was 22,362 million USD.

Hartford Financial Services annual net income generated for period ending Dec-2022 was 1,794 million USD.

EMCOR Group is a Construction company. The company is affiliated with a number of commercial construction, mechanical, electrical, facilities management, building commissioning, life safety and energy services associations. Services provide by the company are construction services, building services and industrial services. The headquarters is in USA.