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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 71  (11.65 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 4.9 years (max.: 26.4 years)

Total number of statutory audit clients: 827 (Ranked #9 in Switzerland)

Change in number of audit engagements: +30 (since 31.12.2025), +93 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 13 (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 17     43 14 3 18 123 1 1 24 10 37 1 2 12 1 7 12 6 15 122 24 52 76 621
Limited liability company 3     3 1   1 41     3 1                   21 2 5 8 89
Foundation     1 2     6 33       1 4     2     1   1 14 4   2 71
Cooperative 2 1   2     1           1                         7
Association       1     1 10     1 1 1                 15   1 1 32
Special legal forms               3                           4       7
∑ 22 1 1 51 15 3 27 210 1 1 28 13 43 1 2 14 1 7 13 6 16 176 30 58 87 827

This audit firm is recorded as statutory auditor for 237 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 827 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       4                                         6
Bern       17               2       1   1           1 1 23
Delémont       4             12                             16
Fribourg       2     14 1     1                     3       21
Lausanne       4     6 9     7   11         1 1 1   134 8 3 1 186
Neuchâtel 3     2     1       4   22                 2   1 1 36
Sion                                             13     13
Vernier       6     4 197 1   4   10 1 1 2   1     10 25 9 9 13 293
Zürich 17 1 1 16 11 3 2 3   1   11     1 11 1 4 12 5 6 12   44 71 233
∑ 22 1 1 51 15 3 27 210 1 1 28 13 43 1 2 14 1 7 13 6 16 176 30 58 87 827

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

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Direct personal relationship:

Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
Kingfluencers AG CHE-138.536.746 Zürich 04.06.2026 Auditor switch Zürich
The Good Deeds Foundation in memory of Farideh and Maher Farid Irshaid CHE-322.184.200 Genève 28.05.2026 First auditor Zürich
UDITIS SA CHE-105.513.566 Neuchâtel 28.05.2026 Auditor switch Neuchâtel
World Ecological Civilization Community Foundation (WECCF) CHE-360.822.898 Genève 26.05.2026 First auditor Vernier
Chasseral Capital SA CHE-291.006.954 Sonvilier 21.05.2026 First auditor Neuchâtel
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
Haya Therapeutics SA CHE-187.646.914 Epalinges 02.06.2026 Auditor switch Lausanne
MENA Chemicals SA CHE-114.959.429 Steinhausen 02.06.2026 Opting-out Zürich
Fondation La Tène CHE-110.177.899 Laténa 26.05.2026 Auditor switch Neuchâtel
Environmental Markets Fairness Foundation CHE-314.480.783 Zürich 19.05.2026 Auditor switch Lausanne
Otis International Sàrl CHE-229.724.522 Vernier 18.05.2026 Auditor switch Vernier