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PORR AG is an Austrian construction company headquartered in Vienna, operating across building construction, civil engineering, infrastructure, project development, and environmental engineering sectors. Founded in 1869 as Allgemeine Österreichische Baugesellschaft, it is Austria's oldest listed company. PORR's services encompass the construction of offices, hotels, universities, stadiums, tunnels, bridges, railways, and power plants. The company has a significant presence in Central, Eastern, and South-Eastern Europe, with operations in countries including Germany, Switzerland, the Czech Republic, Poland, Slovakia, Romania, and Norway. In 2023, PORR reported a production output of EUR 6.577 billion and an order backlog of EUR 8.452 billion. Its strategic focus on infrastructure projects, such as the Brenner Base Tunnel and the SuedLink wind-power line, positions it to benefit from ongoing developments in the energy transition and infrastructure expansion.

Caterpillar is the world's leading manufacturer of construction and mining equipment, off-highway diesel and natural gas engines, industrial gas turbines, and diesel-electric locomotives. Its reporting segments are construction, resource, energy, and transportation. Market share approaches 20% across many products. Caterpillar operates a captive finance subsidiary to facilitate sales. The firm has a global reach that is approximately evenly balanced between the US and the rest of the world. Construction skews more domestic, while the other divisions are more geographically diversified. An independent network of over 150 dealers operates approximately 2,800 facilities, giving Caterpillar reach into about 190 countries for sales and support services.