SIX Swiss Exchange (formerly SWX Swiss Exchange), based in Zürich, is Switzerland's principal stock exchange (the other being BX Swiss). SIX Swiss Exchange also trades other securities such as Swiss government bonds and derivatives such as stock options.

SIX Swiss Exchange is completely owned by SIX Group, an unlisted public limited company itself owned by around 120 national and foreign financial institutions.

The exchange in its current state was founded in 1993 by merging the Geneva Stock Exchange, the Basel Stock Exchange and the Zürich stock exchange into the Verein Schweizerische Effektenbörse (German for "Swiss Securities Exchanges Association"), publicly known in English as Swiss Exchange. The newly created association took over trading in 1995. It was the first stock exchange in the world to incorporate a fully automated trading, clearing and settlement system.