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Fact Sheet FORVIS MAZARS SA

Core Company Information
Company Name FORVIS MAZARS SA
UID CHE-107.861.311
Alternative / previous Names MAZARS AG, MAZARS LTD
Mazars & Guérard SA (until 26.02.2003)
MAZARS (Suisse) SA, MAZARS (Schweiz) AG, MAZARS (Switzerland) LTD (until 19.12.2005)
MAZARS CORESA (until 26.01.2010)
MAZARS CORESA SA, MAZARS CORESA AG, MAZARS CORESA LTD (until 19.04.2013)
MAZARS SA, MAZARS AG, MAZARS LTD (until 13.06.2024)
Domicile Vernier
Canton GE
Legal Form Limited corporation
Inscription Date 06.03.1975
Website https://www.mazars.ch
Phone +41 4 4 3 84 84 44
Takeovers: Coresa, Contrôle, Organisation, Révision SA (CHE-106.031.703), per 19.12.2005
REVITAG SA (CHE-101.360.312), per 09.03.2017
FAOA Information
FAOA ID 500241
RAB Permission state-regulated audit firm
FAOA License active (since 27.12.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (9) FORVIS MAZARS SA (CHE-183.769.593) in Basel (BS)  
FORVIS MAZARS SA (CHE-328.124.886) in Bern (BE)
FORVIS MAZARS SA (CHE-209.061.262) in Delémont (JU)
FORVIS MAZARS SA (CHE-388.216.322) in Fribourg (FR)
FORVIS MAZARS SA (CHE-281.111.934) in Lausanne (VD)
FORVIS MAZARS SA (CHE-363.308.793) in Lugano (TI)
FORVIS MAZARS SA (CHE-463.790.686) in Neuchâtel (NE)
FORVIS MAZARS SA (CHE-317.742.057) in Sion (VS)
FORVIS MAZARS SA (CHE-248.814.976) in Zürich (ZH)
MAZARS CORESA (CHE-271.109.628) in Lausanne (VD)
Membership in Associations EXPERTsuisse
IIAS
Number of auditors with permission 73  (11.63 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 5 years (max.: 25.3 years)

Total number of statutory audit clients: 849 (Ranked #10 in Switzerland)

Change in number of audit engagements: +52 (since 31.12.2025), +80 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 12 (thereof 0 in the SMI, 0 in the SMI Expanded and 7 in the SPI)

Details regarding the distribution of the audit engagements across legal forms and cantons are depicted in the table below.

  AG AI AR BE BL BS FR GE GL GR JU LU NE NW OW SG SH SO SZ TG TI VD VS ZG ZH ∑
Limited corporation 19     43 13 3 18 125 1 1 30 11 39 1 2 11 1 7 13 7 14 124 24 51 81 639
Limited liability company 3     3 1   2 40     4 1                   22 2 5 7 90
Foundation     1 2     6 34       1 4     2     1   1 15 4   2 73
Cooperative 2 1   2     1           1                 1       8
Association       1     1 10     1 1 1                 15   1 1 32
Special legal forms               3                           4       7
∑ 24 1 1 51 14 3 28 212 1 1 35 14 45 1 2 13 1 7 14 7 15 181 30 57 91 849

This audit firm is recorded as statutory auditor for 242 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 849 statutory audits are performed by the branch offices as indicated in the table below.

  AG AI AR BE BL BS FR GE GL GR JU LU NE NW OW SG SH SO SZ TG TI VD VS ZG ZH ∑
Basel 2       3                                         5
Bern       17               2       1   1           1 1 23
Delémont       4             13                             17
Fribourg       2     15 1     1                     4       23
Lausanne       4     6 9     7   11         1 1 1   133 8 3 1 185
Neuchâtel 3     2     1       10   24                 2     3 45
Sion                                             13     13
Vernier       6     4 199 1   4   10 1 1 1   1   1 10 30 9 9 12 299
Zürich 19 1 1 16 11 3 2 3   1   12     1 11 1 4 13 5 5 12   44 74 239
∑ 24 1 1 51 14 3 28 212 1 1 35 14 45 1 2 13 1 7 14 7 15 181 30 57 91 849

Show client list for Basel, Bern, Delémont, Fribourg, Lausanne, Neuchâtel, Sion, Vernier, Zürich.

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Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
Admicasa Holding AG CHE-414.023.707 Zürich 13.10.2026 Auditor switch Zürich
LOGINCO, Coopérative du logement pour l'industrie et le commerce CHE-101.733.206 Lausanne 12.10.2026 Auditor switch Lausanne
42matters AG CHE-224.961.109 Zürich 08.10.2026 Auditor switch Zürich
OMMILOS solutions immobilières Sàrl CHE-418.906.505 Avenches 02.10.2026 First auditor Fribourg
Clinique vétérinaire du Vieux-Château Grands Animaux Sàrl CHE-112.447.236 Delémont 30.09.2026 Auditor switch Delémont
Discontinued audit engagements
The following audit engagements were lost recently, either to a competitor, due to auditor resignation or due to an opting out.
 
Client Name Client UID Domicile End Date Reason Auditor Branch
Lisa Bader Consulting AG CHE-359.155.931 Fällanden 02.10.2026 Auditor switch Zürich
Intertek (Schweiz) AG CHE-110.352.760 Reinach (BL) 30.09.2026 Auditor switch Basel
WeCanGroup SA CHE-414.469.523 Genève 18.09.2026 Auditor switch Vernier
OrientSwiss SA CHE-383.545.149 Lausanne 01.09.2026 Discontinued Lausanne
ZoodPay SA CHE-343.541.719 Lausanne 01.09.2026 Discontinued Lausanne