The company consolidates fifty subsidiaries in 23 countries[2] including Algeria, Germany, Italy, the Netherlands, Austria, Poland, Switzerland, Spain, Czech Republic, Hungary, Belarus and the United States, and upcoming joint ventures with INKA in Indonesia and Medha Servo Drives in India.

Spuhler then decided to expand the business via the launch of new products, as well as the acquisition of two other Swiss factories that built specialist rail vehicles for rack-and-pinion and narrow gauge railways.

[5][7] However, following Adtranz's acquisition by Bombardier in 2001, European Union regulators insisted on the divestiture of the regional and tram product lines.

[5] In addition to its manufacturing efforts, considerable business is derived from contracted maintenance and refurbishment programmes, which Stadler Rail provides to operators throughout Europe, the United States, the Middle East and the North African regions.

[5] In 2014, Stadler Rail announced the formation of a joint venture with Azerbaijan-based company International Railway Distribution LLC to manufacture rolling stock in the nation.

[5] Stadler Rail had traditionally avoided major involvement with the British railway customer base, which it has claimed was due to the unfavourable complexity of the regulatory environment.

[5] However, in 2017, management decided to embark on a decisive push into Britain, both to acquire market share amongst its rail operators and to establish new manufacturing and servicing facilities.

It quickly secured a £610 million order from Abellio Greater Anglia for its FLIRT family, leading to 378 vehicles conforming to the UK's restrictive loading gauge that were built in Bussnang.

[9] Prior to the listing, Spuhler had owned 80% of the business's share capital, while RAG-Stiftung [de] held a further 10%, and the remaining 10% was divided amongst several senior employees at the firm.

[5] Various operators in Germany, Norway, and Britain have adopted the company's Variobahn trams, while Stadler Rail received its first contract for underground trains during 2015.

By June 2022, electronic parts used to assemble rail equipment are no longer deliverable to Fanipaĺ due to international sanctions against Belarus following the forced diversion of Ryanair Flight 4978.