The Swiss Leader Index (SLI) is an index comprising large and mid-cap companies primarily listed on SIX Swiss Exchange. It is made up of 30 of the largest and most liquid Swiss Performance Index (SPI) large- and mid-cap publicly listed company shares. As a price index, the SLI is not adjusted for dividends, but there exists a total-return version as well.
The SLI was introduced on 2 July 2007 and computed back to 30 December 1999, with a baseline value of 1,000 points on this starting date.
The capping model of the SLI makes it suitable as a benchmark for a broader range of products and markets than other indices offered by SIX Swiss Exchange, because it is compatible with regulatory requirements in the European Union as well as in the United States. With its 9/4.5 caps, the SLI is more diversified, and its risk/return profile is more tilted towards smaller capitalizations, than other indices such as the SMI and SPI.
In 2020, the SLI, along with other SIX indices, was endorsed under the EU Benchmarks Regulation and is registered in ESMA, which means that it can be used as an underlying for financial products sold in the EU.
Rules
Universe The SLI comprises the 20 securities of the SMI, as well as the largest 10 securities in the SMI MID.
Capped weightings The largest four components of the SLI are capped at 9%. All other components, if necessary, are capped at 4.5%. The caps are enforced with a multiplication factor that is updated every three months.
This was made to conform the SLI to the EU's UCITS 5/10/40 rule, which says that: The value of any single position cannot be more than 10% of the fund's value, and all positions that are larger than 5% of the fund's value cannot, together, make up more than 40% of the fund's value.
Current constituents
As of November 7, 2025, the following 30 stocks make up the SLI index. Components marked as 1 have a 9% weight as of 7 November 2025. Sizes are based on the SPI classification by market capitalization: L for SPI Large, M for SPI Mid.
Company size SMI GICS Sector Canton Ticker symbol ABB L SMI Industrials Zurich Alcon L SMI Health care Fribourg Amrize L SMI Materials Zug Galderma M SMI MID Health care Zug Geberit L SMI Industrials St. Gallen Givaudan L SMI Materials Geneva Helvetia Bâloise M SMI MID Financials Basel-City Holcim L SMI Materials St. Gallen Julius Bär M SMI MID Financials Zurich Kuehne + Nagel M SMI Industrials Schwyz Lindt (PS) M SMI MID Retail discretionary Zurich Logitech M SMI Information technology Vaud Lonza L SMI Health care Basel Nestlé1 L SMI Retail staples Vaud Novartis1 L SMI Health care Basel Partners Group L SMI Financials Zug Richemont L SMI Retail discretionary Geneva Roche1 L SMI Health care Basel Sandoz Group AG L SMI MID Health care Basel-City Schindler M SMI MID Industrials Lucerne SGS L SMI MID Industrials Geneva Sika L SMI Materials Zug Sonova M SMI MID Health care Zurich Straumann L SMI MID Health care Basel City Swiss Life L SMI Financials Zurich Swiss Re L SMI Financials Zurich Swisscom L SMI Communication services Bern UBS1 L SMI Financials Zurich VAT Group M SMI MID Industrials St. Gallen Zurich Insurance L SMI Financials Zurich
Notes and references