[6] On 28 January 2008, Nokia Corporation announced that they had entered into an agreement to make a public voluntary tender offer to acquire Trolltech.

[11] The Qt environment was a key part of the company's strategy until 2011, when Nokia decided to switch to Windows Phone OS for its smartphones.

[13] The following year, Digia acquired the entire Qt development environment and related business from Nokia.

As a result of the acquisition, Digia became responsible for all of the functions related to Qt technology, including product development.

[22] The company attracted the interest of international investors in spring 2020 when its market capitalization rose above 500 million euros.

[26] By spring 2021, the company’s share price had grown nearly fivefold over a period of one year,[23] and its market capitalization was above 2 billion euros.

[26] In April, the company announced that it would acquire Froglogic, a Germany-based developer of test automation tools for applications based on the Qt GUI framework.

[33] Qt Group has core R&D in Oslo, Norway, as well as large engineering teams in Berlin, Germany, and Oulu, Finland.

The company also has offices in China, Finland, France, Germany, India, Japan, Norway, South Korea, and the US.

The popular free and cross-platform KDE Plasma desktop environment and software compilation uses the Qt library.

The tools can be used for UI design, programming and quality assurance[34] for mobile and desktop applications, as well as embedded systems, which are used in cars, consumer electronics and domestic appliances, for example.

[5] In 2018, its largest markets were the USA, Germany, Japan, South Korea, China, France, the UK, Italy and India.