- Livetools Technology SA
- Livit AG
- Livit FM Services AG
- LIWET Holding AG
- Lixt AG
- LK International AG (KJUS)
- LKC Switzerland Ltd
- LKQ Europe GmbH
- LKS AG
- LLK Treuhand AG
- LM Cadrans SA
- LMR Partners AG
- LMT Tools Global Operations GmbH & Co. KG
- LNM Gastro SA
- LNS Europe
- LNS Management Sàrl
- LO Suisse AG, Basel
- Loacker AG
- Loacker Swiss AG
- Loanboox
- Localfish AG
- Localnet AG
- Localsearch
- localsearch - Swisscom Directories AG
- localsearch (Swisscom Directories AG)
- Locatee AG
- LOCRAM
- Lödige (Schweiz) AG
- Loepfe Brothers Ltd.
- Loft Dynamics AG
- Logiblox AG
- Logifleet SA
- login Berufsbildung AG
- Logismata AG
- LOGITRAK SA
- Logjob AG - For Supply Chain Experts
- Logjob Romandie
- LogTIS GmbH
- Lohri AG
- Lokalinfo AG
- Londero GmbH
- Longchamp Suisse
- Lonstroff AG
- Lonza
- Loomis Schweiz AG
- Loop Medical
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