# The 100 Addresses That Host the Most Companies in Switzerland 13 Aug 2026 6 min read You pull every company registered in Zug and get 44,028 names. Then the addresses start repeating. Sinserstrasse 67 in Cham appears 325 times. Chamerstrasse 172 in Zug appears 260 times. Those rows describe 585 separate legal entities concentrated at two shared addresses. This guide shows how to spot addresses used by many companies and decide which rows need review before they enter a sales queue. ## What a domiciliation address is Swiss law requires every company to have a registered office (*Sitz*) in a Swiss commune. That office appears in the commercial register. The law requires a legal domicile, and staff may work elsewhere. A fiduciary or corporate services provider may let client companies use its address and handle their mail. One office can therefore appear in dozens of separate commercial-register entries. In some arrangements, people from the provider also hold registered roles in the client entities. Tax can influence where a holding structure establishes its seat, particularly in cantons such as Zug. Domiciliation also gives a company a local address and a provider to handle its mail. The reason for choosing the arrangement requires other evidence. ## Where shared addresses are concentrated The commercial register publishes each company's full street address. Group by address and sort descending, and a pattern becomes visible immediately. Fiduciaries and law firms appear repeatedly near the top of the ranking. Large business centres can produce a similar count, so use the ranking to choose addresses for review. A c/o line naming the mail recipient is stronger evidence than the count alone. Alpenstrasse 1 in Lucerne offers a more direct clue: its c/o line names Lunix Services AG as the mail recipient. Source: Swiss commercial register. Active AGs and GmbHs grouped by normalised street address and postal code. A shared-address count is a screening measure. Verification of domiciliation requires further evidence. Spot-check a high-count address in [Zefix](https://www.zefix.ch/en/search/entity/welcome). Open several results and compare their c/o lines and registered people. Read the purpose clauses before classifying the cluster. ## How many rows a shared-address filter flags Among Zug's 37,533 AGs and GmbHs, 23,620 share an address with at least nine other entities. A threshold of ten would therefore flag 62.9% of the list for review. Each flagged entity still requires individual evidence of domiciliation or commercial inactivity. At the same threshold, the national share is 17.5%. Zug is the outlier at 62.9%. Schwyz, Ticino, Geneva, and Nidwalden are also above 25%. Bern and Solothurn are at 4.5%. The filter's effect therefore depends heavily on geography. ## A shared address is a clue that requires verification Domiciliation status must be inferred from several register fields. Build a review flag from those clues, then check for evidence that the company operates. - **Shared address:** a good first-pass flag. If the same street and number appear on 20 or more entities, the address merits review. A threshold of ten catches most clusters. Common false positives include business centres and professional offices. Genuine groups with several entities at one location may also trigger the flag. - **Purpose clause:** holding and domiciliation entities tend to carry broad, generic purposes. "Erwerb, Verwaltung und Veräusserung von Beteiligungen" (acquisition, management and disposal of participations) is the classic holding purpose. These clauses support a holding-company classification. Domiciliation and inactivity require separate evidence. Broad boilerplate also appears in operating companies. - **Repeated registered people:** if the same person appears across many entities at one address, check whether they work for the fiduciary or corporate services provider. A repeated name strengthens the address signal. The person's role still needs verification. Use address concentration to create a review queue. Give the flag more weight when a c/o provider or a repeated registered person points the same way. A holding-only purpose adds context. Evidence of staff and current trading activity can keep an operating company in the sales list. ## A practical shared-address screening workflow **Normalise the address.** Use structured street, number, postcode, and c/o fields where available. Standardise common street abbreviations before grouping, and retain the postcode so identically named streets in different places remain separate. **Create the flag.** Count entities per normalised address. Ten is a reasonable threshold to demonstrate with this dataset, but keep the count so you can choose a threshold appropriate to the market. **Review the address and a sample.** Identify the address occupant and inspect c/o lines. Then compare several entities and decide whether evidence supports a service-provider cluster or a normal multi-tenant location. **Classify each entity for the intended list.** Combine address evidence with current operating signals. Suppress the row from the first calling queue only when the evidence and the target-market definition support that decision. For purpose-clause filtering, use keywords such as "Beteiligungen" (participations), "Holding", "Verwaltung von Gesellschaften" (management of companies), and "Domizilgesellschaft" (domicile company). In French-language registers, the equivalents are "participations", "holding", and "société de domicile". In Italian-language registers, look for "partecipazioni", "holding", and "società di domicilio". Use keyword matches as review flags. Verify each match before removal. A person registered across forty companies at the same address deserves a closer look. Check the person's employer and role, then use that finding alongside the address and purpose. A nominee arrangement requires additional evidence. The raw register data is available via the [Zefix REST API](https://prospex.ch/guides/zefix-rest-api/). These checks are inexpensive once the register fields are structured. They move ambiguous rows out of the first calling queue and leave the final decision visible for review. ## How the filter changes a sales list The commercial register tells you which legal entities exist. A sales list also needs evidence that an entity operates and fits the product you sell. At a fiduciary address, the published phone number may lead to the service provider. Shared-address screening catches that ambiguity before contact research begins. With a threshold of ten, the filter flags 4.5% of AGs and GmbHs in Bern, 16.8% in Zurich, and 62.9% in Zug. These figures measure review volume. Call-failure rates require a separate analysis. When comparing company lists, ask how the vendor normalises addresses, what creates a flag, whether flagged rows are removed or labelled, and how operating companies at multi-tenant addresses are retained. A larger canton count is only useful when you know what each row represents. ## How Prospex applies the method Prospex applies this screening before it builds a market. A high shared-address count raises a flag. Evidence from the company's website and recent activity helps determine whether the entity appears to operate. This keeps address-only holding structures from dominating the result while preserving companies with clear operating evidence. The trade-off is that a young company can be flagged while it sets up operations, and a genuine company in a large business centre can look similar to a domiciliation client. Prospex defaults to suppressing uncertain entities from the first calling queue. [Build a market](https://prospex.ch/market-builder/) and compare it with the AG and GmbH population for the same canton. The smaller result reflects the shared-address screen together with the other operating and market-fit criteria described above. ## More guides - [How to Track Swiss Companies That Just Raised Capital](https://prospex.ch/guides/track-capital-increases/) - [Reading SHAB/FOSC: A Practical Guide for Salespeople](https://prospex.ch/guides/reading-shab-fosc/) - [Where Swiss Company Data Actually Lives](https://prospex.ch/guides/swiss-company-data-sources/) - [Swiss Company Changes: What They Tell You and What They Do Not](https://prospex.ch/guides/buying-signals-swiss-market/) - [Zefix, Moneyhouse or SHAB: Which One to Use](https://prospex.ch/guides/compare-swiss-company-data/) - [What Happens When a Swiss Company Increases Its Capital](https://prospex.ch/guides/what-capital-increase-means/) - [Prospecting in Romandie: A Field Guide](https://prospex.ch/guides/prospecting-romandie/) - [Swiss Trademark Filings as an Early Product-Launch Signal](https://prospex.ch/guides/trademark-filings-signal/) - [How to Check Out a Swiss Company: Name, UID, and What the Registers Tell You](https://prospex.ch/guides/check-swiss-company/) - [How to Monitor a Swiss Company for Changes, Free](https://prospex.ch/guides/monitor-swiss-company/) - [How Big Is That Swiss Company? Sizing a Private Firm from Public Records](https://prospex.ch/guides/size-a-swiss-company/) - [The Zefix REST API: Endpoints, Credentials and Identifiers](https://prospex.ch/guides/zefix-rest-api/) - [The SHAB API: Reading the Swiss Gazette Programmatically](https://prospex.ch/guides/shab-api/) - [Swiss Buying Signals in Clay and n8n](https://prospex.ch/guides/swiss-signals-clay-n8n/) - [Sizing a Swiss Target Market from Public Data](https://prospex.ch/guides/size-a-swiss-target-market/) - [Finding Companies Like Your Best Customers in Switzerland](https://prospex.ch/guides/similar-companies-switzerland/) - [Reactivating Dormant and Closed-Lost Accounts](https://prospex.ch/guides/reactivate-dormant-accounts/) - [How Big Is the Swiss B2B Market, Really?](https://prospex.ch/guides/swiss-b2b-market-size/) - [Who Is Entering Switzerland: Foreign Subsidiaries and Branches](https://prospex.ch/guides/foreign-companies-entering-switzerland/) - [Swiss Directorship Concentration: What a Year of Officer Changes Shows](https://prospex.ch/guides/swiss-directorship-concentration/) - [Gender Composition of Swiss Company Officers](https://prospex.ch/guides/gender-swiss-company-officers/) [All guides](https://prospex.ch/guides/) ## The numbers behind this - [Swiss cantons ranked by capital raised (last 12 months)](https://prospex.ch/signals/cantons-by-capital-raised/) [All rankings](https://prospex.ch/signals/) Build a market from your own criteria, on this data. [See an example market](https://prospex.ch/market-builder/) [Or build your own, free](https://prospex.ch/app/accounts/signup/)