The SMI MID (SMIM) is a stock index which lists Switzerland's mid-cap companies. The index is calculated by SIX Swiss Exchange.
It includes the 30 Prime Standard shares from sectors that rank immediately below the companies included in the Swiss Market Index. The company size is based on terms of order book volume and market capitalization.
The SMI MID was introduced on 15 November 2004, computed back to 3 January 1996 with a baseline value of 1000 points as of 31 December 1999. Its composition is examined once a year. Calculation takes place in real-time: as soon as a new transaction occurs in a security contained in the SMI MID, an updated index level is calculated and displayed.
In 2020, the SMI MID, along with other SIX indices, was endorsed under the EU Benchmarks Regulation and is registered with the European Securities and Markets Authority, which means that it can be used as an underlying for financial products sold in the EU.
Constituents
The following 30 stocks make up the SMI MID index .
Company Sector Canton Ticker symbol Accelleron Industrials Aargau Adecco Industrials Zurich Avolta Retail discretionary Basel-City Barry Callebaut Retail staples Zurich Belimo Industrials Zurich Clariant Materials Basel-Country Ems-Chemie Materials Graubünden Flughafen Zürich Industrials Zurich Galderma Health care Zug Galenica Health care Bern Georg Fischer Industrials Schaffhausen Helvetia Bâloise Financials Basel-City Julius Bär Financials Zurich Lindt & Sprüngli Retail staples Zurich / PSP Swiss Property Real estate Zug Roche (bearer share) Health care Basel-City Sandoz Health care Basel-City Schindler Industrials Lucerne / SGS Industrials Geneva SIG Materials Schaffhausen Sonova Health care Zurich Straumann Health care Basel-City Sunrise Communication services Zurich Swissquote Financials Vaud Swatch Retail discretionary Bern Swiss Prime Site Real estate Soloturn Temenos Information technology Geneva VAT Industrials St.Gallen
Recent adjustments
In the week beginning on Monday, 19 September 2022, SGS (formerly in the SMI), Belimo and the Roche bearer shares will enter SMIM. They will replace Sonova (hearing aids), Cembra (credit cards and consumer credits) and BB Biotech (biotechnology investment company).
On March 31, 2022 the biochemical company Bachem was added to the index, replacing Vifor Pharma , because after sell of Vifor Pharma to the Australian CSL the free float dropped to 1.6% which is below the minimum of 20% required by SIX for index members.
On September 18, 2020, four components were replaced.
On October 16, 2020, Tecan was added to the index after the takeover of Sunrise Communications Group AG.
On July 11, 2023, BWK was added to the index. DocMorris was removed from the index.
On September 22, 2023, Sandoz was added to the index. Bachem was removed from the index.
On July 9, 2024, Galderma was added to the index. Meyer Burger was removed from the index.
On September 5, 2025, Sonova, Swissquote, Accelleron and Sunrise were added to the index. ams, BKW, Tecan, Galenica were removed.
On November 7, 2025, Galenica was added to the index.
See also Swiss Market Index
References
External links