Kötter + Siefker

What Kötter + Siefker does

Kötter + Siefker is a privately-held, third-generation German family business (operating as Kötter+Siefker GmbH & Co. KG) classified as a specialist wholesaler (Fachgroßhändler) and custom manufacturer serving wood, plastic, and metal processing trade businesses. Founded on March 1, 1920, in Lotte, Germany, by Bernhard Kötter and Georg Siefker, the company has evolved from a local hardware shop into a regional production-trading enterprise (Produktionsverbindungshandel) headquartered at Hansastraße 15-17, 49504 Lotte, with 160 employees across four German branch locations (Lotte, Bremen, Magdeburg, Bernburg). Management is held by Susanne Kötter and Hildegard Siefker (Geschäftsführung); a related distribution entity, Alkuba Vertriebs GmbH, is operated from the same address under common managing-director oversight (Bernhard Kötter).

The company's offering spans twelve product categories (building elements and fire protection; furniture fittings, interior fit-out, and shop fitting; plastics and canopies; lightweight metals; metal construction; surface technology; professional tools; roller shutter systems; door hardware; loft doors; accessibility solutions), four service lines (automatic door technology; escape and rescue route technology; locking systems and digital access control; screw foundations), and five in-house manufacturing capabilities (custom aluminum-glass frame systems; window sills; ventilation, facade, and sun-shading elements; bespoke roller shutters; and online product configurators). The B2B e-commerce platform at shop.ks-info.com distributes more than 100,000 articles sourced from over 350 manufacturers including HAWA, Hettich, Blum, Vauth Sagel, and Festool, and is supported by an OXOMI digital catalog portal and PinnCalc product configurator tooling.

Kötter + Siefker generates revenue from three streams: (1) wholesale product sales to commercial trade customers (Tischlerei, Metallbau, Kunststoffverarbeitung, Innenausbau, Montagebetrieb) via four branches and a B2B online shop explicitly restricted to gewerbliche Kunden; (2) in-house custom fabrication of aluminum-glass frames, window sills, ventilation/facade components, and bespoke roller shutters; and (3) technical services such as automatic door installation/maintenance, escape-route technology, locking systems, and screw foundation installation. Pricing is B2B and quote-based; no public pricing tiers are disclosed.

Name

Kötter + Siefker

Legal name

Kötter+Siefker GmbH & Co. KG

Website

https://ks-info.com

Company type

Private

Founded year

1920

Operating status

Operating

Headcount range

101–250 employees

Short description

Kötter + Siefker is a third-generation German family-owned specialist wholesaler and custom manufacturer serving wood, plastic, and metal processing trades across northwest Germany via four branches and a B2B online shop distributing 100,000+ articles from 350+ manufacturers.

Ownership category

akta.pro rank

Product category

Construction Hardware Wholesale

NAICS

Bolt, Nut, Screw, Rivet, and Washer Manufacturing (332722), Blind and Shade Manufacturing (33792)

SIC

Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

Doors, Windows & Millwork Hardware Retail (Locks, Hinges, Handles) (CRAIADAJ)

akta.pro secondary industries

Fasteners, Nails, Screws & Anchors Retail (CRAIADAC), Joinery, Millwork & Casework Installation (Cabinetry, Built-Ins) (IMAFANAJ), Built-In Appliance Installation (Wall Ovens, Cooktops, Built-In Microwaves) (HSAGANAE)

Keywords

• Specialist wholesale hardware
• Construction hardware distribution
• Furniture fittings supply
• Custom roller shutter manufacturing
• Metal construction products

Headquarters

HQ city

Lotte

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Wholesale product sales: Sale of construction hardware, furniture fittings, building elements, fire protection, surface technology, professional tools, lightweight metals, roller shutter systems, and interior/outdoor construction materials to trade businesses. Revenue generated through direct B2B sales via physical branches and an online shop.
2. Custom manufacturing and fabrication: Own manufacturing operations producing custom aluminum-glass frame systems, window sills, ventilation/facade/roller shutter elements, and bespoke solutions. Revenue from fabrication services and bespoke production.
3. Technical services: Services including automatic door technology installation and maintenance, escape and rescue route technology, locking systems, digital access control, and screw foundation installation. Services are delivered by in-house technicians and service staff.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Kötter + Siefker is a specialist B2B wholesaler (Fachgroßhändler) and service partner for wood, plastic, and metal processing trades, operating as a production trading company (Produktionsverbindungshandel). It distributes more than 130,000 articles from over 350 manufacturers across construction hardware, furniture fittings, building elements, fire protection, surface technology, professional tools, lightweight metals, and roller shutter systems, complemented by in-house custom fabrication of aluminum-glass frame systems, window sills, ventilation/facade/sun-shading elements, and roller shutters, plus technical services covering automatic door systems, escape route technology, locking/access control, and screw foundation installation.

Product overview

Kötter + Siefker is a specialist wholesale trade (Fachgroßhändler) and service partner for wood, plastic, and metal processing trades, operating as a production trading company with in-house manufacturing capabilities. The product portfolio spans twelve product categories — Bauelemente und Brandschutz (building elements and fire protection), Möbelbeschläge/Innenausbau/Ladenbau (furniture fittings/interior/shop fitting), Kunststoffe und Überdachungen (plastics and canopies), Leichtmetalle (lightweight metals), Metallbau (metal construction), Oberflächentechnik (surface technology), Profiwerkzeug (professional tools), Rollladensysteme (roller shutter systems), Rund um die Tür (door hardware), Lofttüren (loft doors), and Barrierefreiheit (accessibility) — complemented by six service offerings (Automatische Türtechnik, Flucht- und Rettungswegtechnik, Schließanlagen und Zutrittskontrolle, Schraubfundamente) and five in-house manufacturing capabilities (Alu-Glasrahmensystem, Fensterbänke, Lüftung/Fassade/Sonnenschutz, Rollladenfertigung, Konfiguratoren). Products are distributed via a B2B online shop (shop.ks-info.com) offering over 100,000 articles from more than 350 manufacturers. The company serves craftspeople, industry, planners, and builders across four locations in northwest Germany.

Differentiator

Problem solved

Functional benefit

Products and services

• Bauelemente und Brandschutz Wholesale distribution category covering building elements and fire-protection products such as fire doors, smoke ventilation systems, and related components for trade businesses.
• Möbelbeschläge, Innenausbau und Ladenbau Wholesale distribution category covering furniture fittings, interior construction, and shop-fitting solutions for kitchens, bathrooms, and living spaces, including brand products from Hettich, Blum, and Vauth Sagel.
• Kunststoffe und Überdachungen Wholesale distribution category covering plastics products and canopy systems for terraces, carports, cold conservatories, facades, and custom outdoor installations.
• Leichtmetalle Wholesale distribution category covering lightweight metal products and profiles for construction and manufacturing applications.
• Metallbau Wholesale distribution category covering metal construction products and technology for doors, windows, and gates.
• Oberflächentechnik Wholesale distribution category covering surface technology products including coating systems and spray technology for finishing applications.
• Profiwerkzeug Wholesale distribution category covering professional-grade tools and equipment (including Festool) for craftsmen and industrial use.
• Rollladensysteme Roller shutter systems individually manufactured to custom measurements (Rollladenfertigung).
• Rund um die Tür Wholesale distribution category covering door fittings, locking systems, door technology, and accessories.
• Lofttüren Wholesale distribution category covering loft doors and sliding door solutions with metal and glass elements for modern living spaces, including HAWA Schiebetürsysteme sliding-door systems.
• Barrierefreiheit Wholesale distribution category covering accessibility products and solutions for barrier-free living and working environments.
• Automatische Türtechnik Service covering automatic door systems — supply, installation, and expert service — supporting wood, plastic, and metal processors with tested door systems for new construction and modernization.
• Flucht- und Rettungswegtechnik Service covering escape and rescue route technology systems for trade and commercial buildings.
• Schließanlagen und Zutrittskontrolle Service covering locking systems and digital access control solutions.
• Schraubfundamente Screw foundation installation service used in projects such as structural supports for outdoor installations (e.g., the Dinoversum dinosaur installation at Zoo Osnabrück).
• Alu-Glasrahmensystem (Custom Manufacturing) In-house custom manufacturing of aluminum-glass frame systems produced to customer specifications.
• Fensterbänke (Custom Manufacturing) In-house custom manufacturing of window sills to specification.
• Lüftung, Fassade und Sonnenschutz (Custom Manufacturing) In-house custom fabrication of ventilation grilles, facade elements, and sun-shading components to specification.
• Rollladenfertigung (Custom Manufacturing) In-house custom production of roller shutters to individual measurements and specifications.
• Konfiguratoren (Product Configurators) Online product configurators enabling trade customers to specify and order custom-designed solutions such as roller shutters, window sills, aluminum-glass frame systems, and ventilation/facade elements.
• Kötter + Siefker Online Shop (B2B E-commerce) B2B e-commerce platform offering over 100,000 articles from more than 350 manufacturers, with categories including Türtechnik, Möbelbau, Chemisch Technische Produkte, Allgemeiner Beschlag, Profile und Platten, Fenstertechnik, Werkzeuge, Befestigungstechnik, and HAWA Schiebetürsysteme. Restricted to registered commercial customers (Verkauf nur an gewerbliche Kunden).

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• HAWAcoreChannel Partner/ Reseller/ DistributorHAWA is a brand/manufacturer whose sliding door products are sold through Kötter + Siefker. The company runs a HAWA Handwerker WM promotion (May-July 2026) where customers collect points on HAWA sliding door product purchases for rewards including Weber gas grills and fan equipment.
• HettichcoreChannel Partner/ Reseller/ DistributorHettich is a brand/manufacturer whose furniture fitting products are distributed through Kötter + Siefker's product portfolio.
• BlumcoreChannel Partner/ Reseller/ DistributorBlum is a brand/manufacturer whose furniture fitting products are distributed through Kötter + Siefker's product portfolio.
• Vauth SagelminorChannel Partner/ Reseller/ DistributorVauth Sagel is a brand/manufacturer whose storage and organization systems are part of Kötter + Siefker's furniture fittings product range.
• FestoolminorChannel Partner/ Reseller/ DistributorFestool professional power tools are included in Kötter + Siefker's professional tools product category (Werkzeuge) in the online shop.
• Alkuba Vertriebs GmbHcoreStrategic or Co-development PartnerAlkuba Vertriebs GmbH is a separate but related sales entity. It is listed alongside Kötter+Siefker GmbH in AGB, Widerrufsrecht, and other legal sections as a joint commercial entity. It shares the same headquarters address and appears to be a closely related distribution company under common management (Geschäftsführung: Bernhard Kötter, Hildegard Siefker per the Datenschutz page).

Scale indicators6 records

Recent moves5 records

Expansion highlights3 records

Others

• dormakaba: dormakaba is a global provider of door hardware, automatic doors, escape and rescue route systems, and access control solutions. Relevant to K+S's door technology, escape route technology, and access control service offering, though dormakaba is a multinational manufacturer.
• GEZE GmbH: GEZE is a German manufacturer and service provider of door, window, and safety technology including automatic door systems, escape route solutions, and access control. Comparable to K+S's door-automation and access-control service business, though GEZE is primarily a manufacturer rather than a distributor.

Broad incumbents

• Hornbach Baumarkt: Hornbach is a large German DIY and trade retailer for construction materials, tools, and building elements with a strong pro-customer offer. Overlaps with K+S across building elements, tools, doors, and construction hardware, but operates at a much larger, more consumer-leaning scale.

Direct peers

• Würth: Würth is the largest German specialist wholesaler for fasteners, tools, and trade consumables, selling exclusively to professional trade businesses through a branch and field-sales network. Directly comparable to Kötter + Siefker in serving the same handwerk customers with fasteners, tools, and installation materials.
• EUROBAUSTOFF: EUROBAUSTOFF is a leading German specialist trade cooperative for building materials, timber, and construction supplies serving independent specialist retailers and trade businesses. Comparable to K+S in the B2B specialist distribution model for construction and renovation products.
• REISSER Schraubentechnik: REISSER is a German specialist wholesaler of screws, fasteners, and fastening technology serving wood, metal, and construction trades. Overlaps with Kötter + Siefker in distributing fastening products to the same carpenter, metalworker, and installer customer base.
• Hoffmann Group: Hoffmann Group is a German B2B specialist for quality tools, precision instruments, and workshop supplies sold to industrial and trade customers. Comparable to K+S in the B2B-only, application-advisor-led distribution model for professional tools and workshop consumables.
• Hagebau: Hagebau is a German specialist trade cooperative combining DIY retail and professional trade supply for construction, timber, and building materials. Overlaps with K+S in serving trades and pro-customers with building hardware, timber, and project supplies through a branch network.

Regional players

• Kemmler: Kemmler is a German regional specialist for construction materials, timber, and building products serving trade and pro customers in southern Germany. Comparable to K+S in the B2B specialist trade model for building materials and building elements, with regional rather than national overlap.
• Mobau Würtz: Mobau Würtz is a German regional specialist trade wholesaler for construction materials, timber, and building elements serving handwerk and contractor customers in its region. Comparable as a regional B2B Fachhandel focused on construction elements and timber, though geographically separate from K+S.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/p/K%C3%B6tter-Siefker-GmbH-und-CoKG-61563349439322
• LinkedInlinkedin.com/company/koetterundsiefker
• Instagraminstagram.com/koetterundsiefker

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 record

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 Kötter + Siefker