The database of public procurement
Contracting authority
Stadtwerk Winterthur
Stadtwerk Winterthur has awarded 31 contracts to 25 companies since 2024, most often to Alder-Zani AG Winterthur (3) (as of 3 Oct 2026).
As of: · Source: official notices (Datenservice Öffentlicher Einkauf, CC0), EU Official Journal (TED) and procurement portals · How we count
Tenders since 2025
By year of publication, each notice once. The EU Official Journal (TED) lists no tender under this name from 2006 to 2023. Portals: open tenders from procurement portals beyond the DÖE, since 23 Sep 2026. The current year is incomplete.
Lots per quarter, 12 quarters
All stages, by quarter of publication.
Who wins here
| Company | Trade | Awards | Volume | Latest |
|---|---|---|---|---|
| Alder-Zani AG WinterthurWinterthur | Civil engineering, earthworks, Building shell | 3 | 22 Sep 2026 | |
| F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung WinterthurWinterthur | Planning, Civil engineering, earthworks | 2 | 8 Jul 2026 | |
| Frei Bauunternehmung AGWinterthur | Building shell, Civil engineering, earthworks | 2 | 11 May 2026 | |
| Siemens Schweiz AGZürich | Electrical installations, Other | 2 | 19 Nov 2025 | |
| Hans Gerber AGLindau | Other | 2 | 19 Feb 2025 | |
| HOLINGER AGZürich | Planning | 1 | 21 Aug 2026 | |
| Hugo Leutenegger AGBettwiesen | Sewer and pipeline construction | 1 | 23 Jul 2026 | |
| Bang&Clean Technologies AGOthmarsingen | Other | 1 | 8 Jul 2026 | |
| Ramboll AGZürich | Planning | 1 | 8 Jul 2026 | |
| Avesco AGLangenthal | Other | 1 | 7 Jul 2026 | |
| SCB Environmental Markets SANyon | Other | 1 | 27 Apr 2026 | |
| Stähli Haustechnik AGWinterthur | Heating, ventilation, plumbing | 1 | 20 Apr 2026 |
25 companies with 31 awards across the whole record of this authority.
The network of this authority
Wins here
- Alder-Zani AG Winterthur Winterthur3
- F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung Winterthur Winterthur2
- Frei Bauunternehmung AG Winterthur2
- Siemens Schweiz AG Zürich2
- Hans Gerber AG Lindau2
Plans here
- HOLINGER AG Zürich1
- F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung Winterthur Winterthur1
- Ramboll AG Zürich1
Winners from the award notices, planning offices from the office register.
Bids per trade
Across all awards of this authority that state the number of bids. See everything with Pro
How many bids an award of this authority had. The figure that tells you whether a bid is worth it.
Open tenders
| Deadline | Lot | Stage | Value |
|---|---|---|---|
| 37 days9 Nov 2026 | Beschaffung Kabelverteilkabinen und FundamenteSource (Procurement portal) | Tender | |
| 37 days9 Nov 2026 | Beschaffung Kabelverteilkabinen und FundamenteProcurement portal, published 1 Oct 2026 | Tender |
From the DÖE and from procurement portals beyond the DÖE, deadline from today (3 Oct 2026). The source link leads to the notice or portal page.
Latest lots
| Date | Lot | Stage | Value |
|---|---|---|---|
| 30 Sep 2026 | Beschaffung Kabelverteilkabinen und FundamenteSource (Procurement portal) | Tender | |
| 23 Sep 2026 | Submission für WerkleitungsarbeitenSource (Procurement portal) | Award | |
| 8 Sep 2026 | Tiefbauarbeiten EC Anschluss Banane (Schaffhauserstrasse 6)Source (Procurement portal) | Award | |
| 25 Aug 2026 | Generalplaner für die Überschussentwässerung der Kläranlage Hard WinterthurSource (Procurement portal) | Award | |
| 24 Jul 2026 | Rohrleitungsbauarbeiten EC BananeSource (Procurement portal) | Award | |
| 11 Jul 2026 | Lizenzierung von Kesselreinigungsleistungen KVA WinterthurSource (Procurement portal) | Award | |
| 10 Jul 2026 | Planerleistungen im Bereich Tiefbau für das Wärmeversorgungsgebiet Oberwinterthur (V10)Source (Procurement portal) | Award | |
| 10 Jul 2026 | Planerleistungen im Bereich Rohrleitungsbau für das Wärmeversorgungsgebiet Oberwinterthur (V10)Source (Procurement portal) | Award | |
| 9 Jul 2026 | Markterkundung zur Beschaffung von anrechenbaren Einsparnachweisen gemäss Art. 46b Energiegesetz (EnG)Source (Procurement portal) | Tender | |
| 9 Jul 2026 | Mobile Notstromgruppe 250 kVA auf AnhängerSource (Procurement portal) | Award | |
| 29 May 2026 | Planerleistungen im Bereich Tief- und Rohrleitungsbau für den Perimeter Neuwiesen IISource (Procurement portal) | Tender | |
| 14 May 2026 | Erd- und Maurerarbeiten Agnesstrasse (Unt. Briggerstr. - Jägerstr.)Source (Procurement portal) | Award | |
| 28 Apr 2026 | CO2-Zertifikate für die Strom- und Gasprodukte von Stadtwerk WinterthurSource (Procurement portal) | Award | |
| 22 Apr 2026 | HHZ Sennhof Wärmeverteilung und SanitärSource (Procurement portal) | Award | |
| 8 Apr 2026 | Planerleistungen im Bereich Tiefbau für das Wärmeversorgungsgebiet Seen (V11)Source (Procurement portal) | Award | |
| 8 Apr 2026 | Planerleistungen im Bereich Rohrleitungsbau für das Wärmeversorgungsgebiet Seen (V11)Source (Procurement portal) | Award | |
| 8 Apr 2026 | Baumeisterarbeiten für den Neubau der Trafostation OberfeldSource (Procurement portal) | Award | |
| 13 Mar 2026 | Umbau Holzheizzentrale GernSource (Procurement portal) | Award | |
| 12 Mar 2026 | Lizenzierung Kesselreinigung mit Druckwellen durch "Gas-Verpuffungen"Source (Procurement portal) | Tender | |
| 26 Feb 2026 | 1. EC_Sho Fernwärme - Shopping SeenSource (Procurement portal) | Award |
The 20 most recent lots of all stages in the last 12 quarters. Prior information means planning, no tender yet; archive means past.
Questions and answers
How many contracts has Stadtwerk Winterthur awarded?
Stadtwerk Winterthur has awarded 31 contracts to 25 companies since 2024. On average there were 3.6 bids per award, counted over 26 awards that state the number.
Which companies win most often at Stadtwerk Winterthur?
Most awards went to Alder-Zani AG Winterthur (3), F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung Winterthur (2) and Frei Bauunternehmung AG (2). In total, 25 companies have won an award here.
What does Stadtwerk Winterthur put out to tender?
By CPV division, the most recent tenders mainly concern “Electrical equipment” (1), “Construction work” (1) and “Architecture and engineering” (1). The database holds 5 tenders of this authority.
Which planning offices work for Stadtwerk Winterthur?
In the last twelve quarters, planning contracts went mainly to HOLINGER AG (1), F. Preisig AG, Bauingenieure und Planer, Zweigniederlassung Winterthur (1) and Ramboll AG (1).