ATCO is a Canadian diversified corporation that operates in the energy, infrastructure, and natural resources industries. It was founded in 1947 and is headquartered in Calgary, Alberta, Canada. The company started as a trailer transportation business but quickly diversified into other industries.

Today, ATCO is primarily focused on three main business segments: Structures & Logistics, Utilities, and Energy. Under the Structures & Logistics segment, ATCO offers workforce housing, modular facilities, site services, and logistics to industries such as mining, oil and gas, and defense. Their products and services cater to both remote and urban environments.

The Utilities segment includes ATCO's regulated natural gas and electricity distribution utilities in several Canadian provinces. It provides safe and reliable energy services to residential, commercial, and industrial customers. ATCO's Energy sector includes power generation, natural gas gathering, processing and storage, as well as retail energy services.

It operates natural gas and coal-fired electricity generation facilities in Canada and Australia. ATCO has a notable presence on a global scale. Its subsidiaries, such as Canadian Utilities Limited, ATCO Australia, and ATCO Energy Solutions, contribute to its global operations.

The company has also formed joint ventures and partnerships, including a joint venture with Quanta Services, Inc., called ATCO-Quanta LLC, which provides infrastructure solutions in the United States. ATCO enjoys a strong market position in the industries it operates in. In terms of global sales, it consistently generates billions of dollars in annual revenue.

It competes with other multinational corporations such as SNC-Lavalin, Fluor Corporation, and KBR Inc. In recent years, ATCO has made several noteworthy achievements and undergone strategic changes. In 2018, the company announced plans to expand its Clean Energy Innovation Hub to develop new technologies and solutions for the energy industry.

ATCO has also invested in renewable energy projects such as solar power and battery storage facilities. As of the latest update, ATCO continues to strengthen its position as a leading Canadian corporation. It strives to deliver innovative solutions and services that meet the evolving needs of its customers globally