stooss

What stooss does

Stooss AG (legal name: Schmiedewerk Stooss AG) is a Swiss family-owned metal forging manufacturer founded in 1905 and headquartered in Hedingen, canton Zurich, approximately 15 km from Zurich. The company specializes in thermo-forming technology (warmumformtechnik) applied to unalloyed, low- and high-alloy steels, light and non-ferrous metals, and nickel alloys, producing three core product families: open-die forgings (bars, plates, shafts, hubs, rotors, sleeves), seamless profiled hot-rolled rings and balls, and hammer-forged parts of 30–60 kg, with typical piece weights from 100 kg up to approximately 5 tons.

The technical platform rests on capital-intensive equipment — a 2,700-ton forging press and 1,200/1,600-ton hydraulic presses, electronically controlled ring rolling mills, electrically and gas-heated heat-treatment furnaces up to 1,200°C with full automatic temperature control, CNC turning/boring/milling up to 3,200 mm, and 3D measuring machines with 2.8 µ accuracy on 450 mm. This stack is held together by an unusually deep certification portfolio: EN 9100:2018 for aerospace, ISO 9001/14001/45001, all six major maritime classification societies (ABS, Lloyd's Register, DNV GL, Bureau Veritas, Class NK, RS), TÜV PED, NORSOK M-650 / ISO 17782-2018, a Leonardo Helicopters scope-of-approval, and EcoVadis CSR.

Commercially, Stooss operates a custom B2B manufacturing model: quote-based pricing against customer specifications, multi-year supply relationships, and direct distribution through wholly-owned subsidiaries in Hagen, Germany (STOOSS GmbH) and Conroe, Texas (STOOSS USA Inc.), supplemented by regional sales representatives covering Europe, the Middle East, and Asia-Pacific. The company sells into power generation (turbines, generators, gears, valves), oil & gas (drilling, conveyance, offshore), shipbuilding and marine, aerospace (helicopter and aircraft components), and general industrial manufacturing. Headcount is approximately 130 at the Hedingen plant, annual forging capacity is 20,000 tons, and the company maintains more than 100 steel grades with over 1,000 tons of raw material in stock to support short lead times.

Name

stooss

Legal name

SCHMIEDEWERK STOOSS AG

Website

https://stooss.com

Company type

Private

Founded year

1905

Operating status

Operating

Short description

Stooss AG is a Swiss family-owned metal forging manufacturer (founded 1905, 4th generation) producing open-die forgings, seamless rolled rings, and finish-machined parts up to 5 tons for power generation, oil & gas, aerospace, and marine customers.

Ownership category

akta.pro rank

Product category

Industrial Metal Forgings

NAICS

Forging and Stamping (33211), Iron and Steel Forging (332111), Nonferrous Forging (332112)

SIC

Metal Forgings & Stampings (3460)

akta.pro primary industry

Steel Casting (Continuous Casting, Ingots, Semi-Finished Slabs/Billets/Blooms) (IMAKABAD)

Keywords

• Open-die forgings
• Seamless rolled rings
• Custom metal forging
• Industrial forging services
• Forged steel components

Headquarters

HQ city

Hedingen

HQ country

Switzerland

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales, Operations

Revenue model

1. Forged Components Manufacturing: Manufacturing and sale of custom open-die forgings, seamless rolled rings, balls, and machined components for industrial applications. Products range from 100 kg to 5 tons, serving sectors including power generation, oil and gas, machine construction, and aerospace.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Stooss (Schmiedewerk Stooss AG) is a Swiss metal forging manufacturer producing custom open-die forgings, seamless profiled rolled rings, balls, and hammer-forged parts from unalloyed, low and high-alloy steels, light and non-ferrous metals, and nickel alloys. Forgings range from 100 kg to approximately 5 tons per piece and are delivered as raw forged components or as fully finish-machined parts after in-house heat treatment and CNC machining. The company primarily serves industrial buyers in power generation, oil and gas, aerospace, shipbuilding, and general machinery manufacturing under long-term supply relationships.

Product overview

STOOSS AG is a Swiss forging company (Schmiedewerk Stooss AG) specializing in thermo-forming technology for unalloyed, low and high-alloy steels, light and non-ferrous metals, and nickel alloys. The product portfolio centers on three core manufacturing processes: Open-Die Forgings (custom-forged parts including bars, plates, shafts, hubs, and sleeves up to 5 tons), Ring Rolling (seamless profiled rolled rings and balls up to 5 tons), and Hammer Forging (individually forged parts of 30-60 kg). These core products are supported by two key service modules: in-house Heat Treatment Services (normalizing, annealing, tempering, quenching) and Machining Services (CNC turning, boring, milling). The company maintains over 100 material grades in stock, including various steel types and nickel alloys, enabling flexible production from raw material through finished, machined forgings.

Differentiator

Problem solved

Functional benefit

Products and services

• Open-Die Forgings Custom-forged metal parts produced by shaping heated metal between dies, including rectangular bars, plates, shafts, flanged shafts, rotors, hubs and sleeves in weights up to 5 tons. Sold to industrial OEMs in power generation, oil and gas, aerospace, shipbuilding and general machinery.
• Seamless Profiled Rolled Rings Seamless hot-rolled and profiled rings produced by preforming, punching and rolling billets to required dimensions on electronically controlled ring rolling mills, weighing up to approximately 5 tons. Supplied to industrial buyers needing ring-shaped forged components in steels and nickel alloys.
• Hammer Forged Parts Individually hammer-forged parts including bars, shafts and rings typically weighing 30 to 60 kilograms, produced using hammer forging techniques. Used by industrial customers needing smaller, individually shaped forged components.
• Heat Treatment Services In-house heat treatment services including normalizing, annealing, tempering, soft annealing and quenching in oil, water or polymer, performed in environmentally compatible gas and electrically powered furnaces up to 1,200°C. Provided to industrial customers as a follow-on service to forging orders.
• CNC Machining Services CNC and conventional machining including turning, boring and milling to finish forged parts to customer specifications, with capabilities up to 3,200 mm diameter on CNC vertical turning lathes. Supplied as a value-added service so customers receive finish-machined parts from a single supplier.
• Steel and Alloy Material Supply Supply of over 100 different grades of steel and alloy in stock, including carbon and low-alloyed steels, high-alloyed steels, heat-resisting steels, nickel alloys (Inconel, Incoloy, Monel) and aluminum alloys, with more than 1,000 tons of raw material on hand. Provided as part of custom forging orders.

Quantifiable outcome

• Annual forging capacity: 20,000 tons
• +3 more outcomes

Named customers4 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Leonardo HelicopterscoreStrategic or Co-development PartnerLeonardo Helicopters has granted STOOSS a scope of approval for aerospace-grade forging components, indicating a strategic supplier relationship for helicopter manufacturing.

Scale indicators5 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Bharat Forge: One of the largest global forging companies, offering open-die and closed-die forged components across automotive, oil & gas, power, and aerospace. Comparable in product breadth but operates at significantly larger scale with closed-die automotive as a major vertical.
• Doncasters Group: Global precision castings and forgings manufacturer serving aerospace, industrial gas turbines, and defense. Comparable in aerospace-grade quality certification and turbine component manufacturing, though broader across castings.
• Voestalpine (Böhler/Edelstahl): Austrian steel and specialty forgings giant producing tool steel, high-speed steel, and forged components for aerospace, automotive, and energy. Overlaps in high-alloy forging capability and aerospace certification, but operates as integrated steelmaker at much larger scale.

Direct peers

• Scot Forge: US-based open-die and seamless rolled ring forging manufacturer serving power generation, oil & gas, aerospace, and defense. Closely comparable in product mix (open-die forgings, rings, custom alloys) and end-market focus.
• Leiber Group: German family-owned open-die forge producing steel and aluminum forgings for mechanical engineering, drive technology, and aerospace. Highly comparable in size, family-ownership profile, European base, and open-die product mix.
• Ellwood Group: US-based specialty steelmaker and open-die forger serving defense, oil & gas, and industrial markets. Comparable in open-die forging capability, integrated heat treatment, and serving safety-critical applications.
• Sidenor Industrial: European specialty steelmaker and forger serving automotive, energy, and industrial markets with open-die forged components. Comparable in steel forging capability and European industrial customer focus.
• Ovako: Swedish specialty steel and forging producer (now part of Nippon Steel) serving bearing, transmission, and heavy industrial markets. Comparable in European location, steel-based forging capabilities, and engineering-grade alloy focus.
• Saarland Schmiede / Saarschmiede: German heavy forge historically producing large open-die forgings for power generation and shipbuilding. Closely comparable in heavy open-die forging, ring rolling, and serving the same European industrial customer base.

Regional players

• GF Casting Solutions: Swiss-based precision casting and forging operation under Georg Fischer for industrial applications. Regional peer sharing Swiss location and serving European industrial customers, though more focused on castings than open-die forgings.

Market position

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/schmiedewerk-stooss-ag

Compliance14 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about stooss