After the company's successful establishment in the market, not only did the product range grow steadily but also the workforce. Thus in 1981, production and administration moved to a shared building in Tübingen. At the same time, the share capital was increased and the name changed to "Hartmetall-Werkzeugfabrik Paul Horn GmbH".

By 1991, however, the capacity of this production facility was no longer sufficient, leading to construction of what is now our main factory building. Lothar Horn also joined the company in 1991 and took over the position of Managing Director in 1995. In addition, Horn Hartstoffe GmbH was founded in 1991 to advance the development of our own carbide grades and geometry concepts.

A further major step was development of the new building in Tübingen in 1999. Management, sales, training and seminar rooms, a demonstration, research and development centre and complete production including an in-house coating centre were combined on a site with total surface area of approximately 9000 m2. Between 1993 and 2001, foreign subsidiaries were established in France, England, the USA and Hungary in order to be able to service the relevant markets even more efficiently.

In spring 2008, to further expand the leading position of Horn in the world market, a further production building was established, doubling the production area again with an extra 5,500 m2, extending the Tuebingen headquarters building and the existing production facility of around 6,000 m2. TThe commissioning carried out by HORN also involved a reorganisation of the production processes. In 2011, Horn Hartstoffe GmbH opened a new building with a total area of around 5,000 m². This made all moulding processes for carbide tools available in-house. Since 2013, the new plant has also been producing carbide blanks and wear parts for third-party companies.

In the summer of 2016, another 15,000 m² production building was put into operation in the immediate vicinity of the Tübingen main plant of Paul Horn GmbH, at that time the largest industrial building in Tübingen. This mainly accommodates areas for carrier manufacture, coating and logistics. Since December 2016, the new administrative wing provides 3,500 m2 of space on six levels. Beside offices there are seminar rooms for increasingly important customer training as well as for internal personnel development training. Clear architecture and bright rooms provide space for 120 employees.