The Swiss Stock Exchange has a statutory obligation to publish all information necessary for the transparency of securities trading, specifically price information and volume of the securities traded on-exchange. We publish the last exchange price with volumes and time (continuous transmission), the best bid and ask prices with volumes (cumulative, continuous), the trading period and any intervention by the exchange (e.g. suspension of trading in a security), the order book status (Trading, Pre-Opening, Stop Trading, Suspended) and the market depth.
SIX Exfeed Ltd provides the information in real time (along with other vendors such as Refinitiv, Bloomberg etc. that make the information available to the public).