Wienerberger AG is an Austrian brick maker which is the world’s largest producer of bricks,^[3] (Porotherm, Terca) and number one on the clay roof tile market (Koramic, Tondach) in Europe as well as concrete pavers (Semmelrock) in Central and Eastern Europe. In pipe systems (Steinzeug-Keramo ceramic pipes and Pipelife plastic pipes), the company is one of the leading suppliers in Europe. With its over 200 production sites, the Wienerberger Group generated revenues of €4,977 million and EBITDA of €1,026.2 million in 2022. It is based in Vienna, Austria. Founded in 1819, the company's shares have been listed on the Vienna Stock Exchange since 1869 and currently have a free float of 100%.

Wienerberger was founded in 1819 in Vienna by Alois Miesbach (1791–1857) and has traded since 1869 on the Vienna Stock Exchange. In 1986 the company expanded from a local Austrian brick-maker into one of the world’s largest producer of bricks within a few years.^{[citation needed]}

The company has acquired a number of its competitors, including Baggeridge PLC in June 2007, with the takeover being cleared by the British Competition Commission in May 2007; and Keymer Tiles in 2014.^[4]