SJ AB
 | |
 SJ X 2000 train | |
| Type | State-owned Aktiebolag |
|---|---|
| Industry | Rail transport |
| Predecessor | Swedish State Railways |
| Founded | 1 January 2001 |
| Headquarters | Vasagatan 10, , |
Area served |
|
| Key people | Jonas Abrahamsson (CEO) |
| Revenue | 1.055 billion SEK (2025) |
| 14.517 Billion SEK (2025) | |
| Owner | Government of Sweden |
Number of employees | Total approx. 7100 Götalandståg approx. 800 Stockholmståg approx. 1 800 SJ Norge approx. 400 Krösa approx. 320 (2025) |
| Subsidiaries | SJ Götalandståg SJ Stockholmståg SJ Norge SJ Norrlandståg SJ Krösa SJ Öresund AB (not active) AJ Mälardalen AB (not active) |
| Website | sj.se (Sweden) sj.no (Norway) |
SJ is the primary passenger train operator in Sweden. A wholly state-owned company operated for-profit under market conditions, SJ operates various services across Sweden. SJ's operations include high-speed trains, intercity trains, night trains, and regional trains, with some services extending into Denmark, Norway and Germany.
SJ traces its roots back to 1856, however was established in its current form as a passenger train operator (SJ AB) in 2001, following the restructuring of Statens Järnvägar, the former government agency responsible for the Swedish railways. SJ AB also has subsidiaries such as SJ Götalandståg, SJ Stockholmståg, and SJ Krösa, which operate procured regional services in various parts of Sweden. Since 2020 SJ Norge has operated regional services in Norway on behalf Jernbanedirektoratet. In 2025, SJ carried almost 1.5 million passengers in August 2025.