Steiner

Construction Servicessteiner.ch

Steiner AG is a Swiss general contractor and real estate developer founded in 1915, now broken up and in definitive insolvency proceedings. Operating units were divested to m3 Gruppe and Demathieu Bard; the residual shell entity is being wound down under a creditor composition agreement.

Company typePrivate
Founded1915
HeadquartersZürich, Switzerland
Headcount501–1,000
GTM typeB2B
OfferingServices

What Steiner does

Steiner AG was a Swiss general contractor (Totalunternehmer/Generalunternehmer, TU/GU) and real estate developer founded in 1915 in Zürich as a carpentry workshop and converted into an Aktiengesellschaft in 1980. Over its 111-year operating history the company delivered more than 1,500 residential projects, 540 commercial properties, 45 hotels and 200 infrastructure facilities, including landmark Swiss references such as Sihlcity, Prime Tower, Maison de la paix and the Vulcano high-rise trio. From May 2010 to December 2024 the company was wholly owned by India's Hindustan Construction Company Ltd. (HCC) and operated Steiner India Ltd. alongside its Swiss operations.

In 2023 Steiner AG ceased taking on new TU/GU work in German-speaking Switzerland, and in early 2024 it sold its Western Swiss subsidiary Steiner Construction SA to the international construction group Demathieu Bard. On 5 June 2024 the company filed for provisional debt restructuring (provisorische Nachlassstundung) under Articles 293 ff. of the Swiss Debt Enforcement and Bankruptcy Act (SchKG). Through a series of court-supervised transactions during 2024-2025 the business was broken apart: on 27 September 2024 the Bezirksgericht Zürich authorised the transfer of the entire real estate development business (personnel, systems and services) to a newly founded 100%-owned subsidiary, Steiner Development AG; on 19 December 2024 the Geneva-based m3 Gruppe acquired all shares of Steiner Development AG in the same court-approved transaction that saw the disputed TU/GU receivables (the "EAGLE assets") carved into Steiner Eagle AG (now H56 Immo AG) and sold to HCC subsidiaries, and the shares of Steiner AG itself sold to the Swiss special-purpose vehicle Uniresolv SA.

Since 7 February 2025 Steiner AG has been in definitive Nachlassstundung, with Wicki Partners AG (Mandatsleiter RA Balthasar Wicki) serving as definitive Sachwalterin. The moratorium has been extended multiple times, most recently to 6 August 2026. A creditors' meeting on 1 July 2026 approved the appointment of the liquidation bodies (Liquidatorin and Gläubigerausschuss), and a Nachlassvertrag mit Vermögensabtretung under Articles 317 ff. SchKG was put to written creditor vote in July 2026. The administrator has indicated an expected 7-9% dividend for third-class claims under the liquidation plan versus approximately 2.2% in a bankruptcy scenario. Steiner AG no longer operates as a going concern and its original steiner.ch website now redirects to the administrator's information site at sachwalter-steiner.ch.

Steiner firmographics

Firmographics

Name: Steiner
Legal name: Steiner AG
Website: https://steiner.ch
Company type: Private
Founded year: 1915
Operating status: Closed
Headcount range: 501–1,000 employees
Short description: Steiner AG is a Swiss general contractor and real estate developer founded in 1915, now broken up and in definitive insolvency proceedings. Operating units were divested to m3 Gruppe and Demathieu Bard; the residual shell entity is being wound down under a creditor composition agreement.
Ownership category
akta.pro rank

Where Steiner is headquartered

Location

Headquarters

HQ city: Zürich
HQ country: Switzerland
HQ region: Europe

Offices2 records

Markets served

Steiner business model

Business model

GTM type: B2B
Offering type: Services
Cost components: Personnel, Supply Chain, Operations, Others

Steiner product offering

Product offering

Core offering

Steiner AG was a Swiss general contractor (Totalunternehmer/Generalunternehmer) and real estate developer delivering turnkey construction and property development services for residential, commercial, hotel, and public-infrastructure projects across Switzerland. The company acted as the single point of responsibility for project development, planning, execution, and handover of complex large-scale builds. The company is currently in definitive Nachlassstundung (debt restructuring/liquidation proceedings) and no longer offers these services as a going concern.

Product overview

Steiner AG was a Swiss construction and real estate development company (Generalunternehmer/Totalunternehmer - general contractor) founded in 1915. The company underwent debt restructuring proceedings (Nachlassstundung) starting June 2024, with its real estate development business transferred to Steiner Development AG (subsequently acquired by m3 Gruppe) and the remaining entity entering liquidation. The original steiner.ch website is no longer operational and redirects to the administrator's information site (sachwalter-steiner.ch). No active product offerings or services are described in the available source data.

Differentiator

Problem solved

Functional benefit

Companies that use Steiner

Customer profile

Ideal customer profiles1 record

Steiner technology and API

Technology

API detail

Has API: No
API docs
API detail

Core technology

AI maturity

App detail

Steiner partnerships and signals

Strategic signal

Partnerships

Nine partnerships are on record, tiered core, minor and major.

Wicki Partners AGcoreOthers · 1 July 2026Wicki Partners AG (Mandatsleiter: RA Balthasar Wicki) was appointed as provisional Sachwalterin on 6 June 2024 and confirmed as definitive Sachwalterin from 7 February 2025. Wicki Partners AG has been nominated to continue as liquidator in the event of a Nachlassliquidation.
Agricultural tenant (Niederhasli)minorOthers · 10 July 2025On 10 July 2025, the court authorized the sale of an agricultural property in Niederhasli (parcel No. 1936) to the current tenant of the property.
m3 Gruppe / m3 Immobilier Holding SAmajorStrategic or Co-development Partner · 19 December 2024On 19 December 2024, m3 Gruppe, a leading Geneva-based real estate developer, acquired 100% of the shares of Steiner Development AG from Steiner AG in a court-authorized transaction pursuant to Art. 298(2) SchKG. This transferred Steiner's real estate development business back into Swiss hands.
Steiner Eagle AG (today: H56 Immo AG)minorStrategic or Co-development Partner · 19 December 2024Disputed receivables from former TU/GU projects (the 'EAGLE assets') were carved out into Steiner Eagle AG (now H56 Immo AG) and sold to two HCC Group subsidiaries as part of the December 2024 restructuring transaction.
Steiner Development AGmajorStrategic or Co-development Partner · 27 September 2024On 27 September 2024, the Bezirksgericht Zürich authorized Steiner AG to transfer its entire real estate development business (including staff, systems, and contracts) to its newly founded 100%-owned subsidiary Steiner Development AG. This entity was subsequently sold to m3 Gruppe on 19 December 2024.
Steiner Projekte AGminorStrategic or Co-development Partner · 25 June 2024Steiner Projekte AG is a 100%-owned subsidiary (special purpose vehicle) of Steiner AG. Its shares were pledged to an HCC Group entity as collateral for a masa loan required to finance the provisional restructuring.
Werkarena Basel AGminorOthers · 30 January 2024On 30 January 2025, the Bezirksgericht Zürich authorized the sale of Steiner AG's equity stakes in Werkarena Basel AG and WORKCONTROL Suisse AG as part of the asset disposal program during insolvency proceedings.
WORKCONTROL Suisse AGminorOthers · 30 January 2024On 30 January 2025, the Bezirksgericht Zürich authorized the sale of Steiner AG's equity stakes in WORKCONTROL Suisse AG and Werkarena Basel AG as part of the asset disposal program during insolvency proceedings.
Demathieu BardminorStrategic or Co-development Partner · 1 January 2024Beginning of 2024, Steiner AG sold its Swiss subsidiary Steiner Construction SA to the international construction group Demathieu Bard. Steiner Construction SA continued operating in Western Switzerland as a TU/GU.

Scale indicators4 records

Recent moves10 records

Steiner competitors and assessment

Company assessment

Broad incumbents

Implenia: Implenia is Switzerland's largest construction and real estate services group, operating across general contracting, real estate development, and infrastructure. It is a broad incumbent comparable to historic Steiner AG in scope and Swiss market presence, but with a much larger and more diversified portfolio across residential, commercial, and civil works.

Direct peers

Losinger Marazzi: Losinger Marazzi is a leading Swiss general contractor and real estate developer active in both German-speaking and French-speaking Switzerland, with a comparable mix of residential, commercial, and infrastructure projects. It is one of the closest direct competitors to Steiner AG's historical TU/GU and development business.
HRS Real Estate: HRS Real Estate is a Swiss general contractor and developer specializing in complex residential, commercial, and public-sector projects. It serves a similar Swiss customer base and competes directly with Steiner AG's traditional general contractor offering.
Priora AG: Priora AG is a Swiss general contractor and real estate developer delivering turnkey commercial, residential, and mixed-use projects. It is a direct competitor to Steiner AG in the Swiss TU/GU and development market.
Anliker AG: Anliker AG is a Swiss construction group with general contracting, real estate development, and civil engineering capabilities. It competes with Steiner AG for similar Swiss customers and project types, particularly in German-speaking Switzerland.
Marti Group: Marti Group is one of Switzerland's largest construction groups, active in general contracting, civil engineering, and real estate development. It is a direct competitor to historic Steiner AG in the Swiss general contractor market.
Frutiger AG: Frutiger AG is a Swiss construction company providing general contractor, civil engineering, and real estate development services. It is comparable to Steiner AG in serving Swiss commercial, residential, and infrastructure customers across German-speaking Switzerland.

Others

m3 Immobilier Holding SA (m3 Gruppe): m3 Gruppe is a Geneva-based real estate developer that acquired 100% of Steiner Development AG in December 2024. It is the successor to Steiner's real estate development business and a directly comparable Swiss developer, although it was historically focused on the Romandie region.
Demathieu Bard: Demathieu Bard is a French-headquartered international construction group that acquired Steiner Construction SA in early 2024. It is a peer in general contracting and construction services, with overlapping capabilities in the Swiss and broader European markets.

Regional players

Royal BAM Group: Royal BAM Group is a major European construction group with general contracting and property development operations across the Netherlands, UK, Germany, and other markets. It is a regional peer to Steiner AG, operating similar construction and development services in adjacent European geographies.

Market position

Strengths3 records

Weaknesses4 records

Competitive moat1 record

Key risks6 records

Key highlights4 records

Customer concentration

Steiner financial estimates

Financial estimate

Revenue estimate

Valuation estimate

Steiner leadership team

Management profile

Number of profiles

Steiner subsidiaries and ownership

Company hierarchy

Subsidiaries5 records

Steiner funding detail

Funding detail

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

Steiner M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Steiner

What does Steiner do?

Is Steiner a public or private company?

Steiner is a private company. It is classified as corporate owned and is currently closed.

When was Steiner founded?

Steiner was founded in 1915. It employs 501 to 1,000 people.

Where is Steiner based?

Steiner is headquartered in Zürich, Switzerland, in the Europe region.

Who are Steiner's main competitors?

Implenia is listed as a broad incumbent. Direct peers are Losinger Marazzi, HRS Real Estate, Priora AG, Anliker AG, Marti Group and Frutiger AG. Others are m3 Immobilier Holding SA (m3 Gruppe) and Demathieu Bard. Royal BAM Group is listed as a regional player.

Does Steiner have an API?

No public API is recorded for Steiner.