| # | Company | Employees |
|---|---|---|
| 1 | 6,389 | |
| 2 | 5,374 | |
| 3 | 3,398 | |
| 4 |
Wilo Groupcms.media.wilo.com
Development and provision of sustainable, intelligent water management solutions for building services, industry, and global water challenges worldwide. |
2,709 |
| 5 |
thyssenkrupp Uhdethyssenkrupp-uhde.com
A global leader in engineering and constructing chemical, refining, and industrial plants, offering leading technologies and complete value chains for green chemicals |
2,201 |
| 6 |
Amprion GmbHamprion.net
The company operates a power grid that supplies electricity to 29 million people in Europe, focusing on sustainability and innovative solutions for the energy transition |
2,192 |
| 7 |
Maternamaterna.de
An internationally successful IT service provider supporting businesses and authorities with digitalization through consulting, implementation, and operation services across various sectors |
2,134 |
| 8 |
Westnetzwestnetz.de
Westnetz is a Strom- and Gasverteilnetzbetreiber in western Germany, ensuring efficient energy supply through modern infrastructure to support the Energiewende |
1,558 |
| 9 |
Stadt Dortmunddortmund.de
The company in Dortmund offers diverse career opportunities in administration, social services, culture, fire safety, and more, including training programs and job positions |
1,409 |
| 10 |
University of Applied Sciences and Arts Dortmundfh-dortmund.de
A future-oriented university with over a century of history, offering practical problem-solving education in various fields to over 14,500 students |
1,027 |
| 11 |
COMCAVE.COLLEGE GmbHcomcave.de
A future-oriented educational academy offering comprehensive training in IT, multimedia, management, languages, and more, to provide skilled professionals to the job market |
996 |
| 12 |
International School of Management, Germanyism.de
A leading private business school in Germany offering practice-oriented degree programs with international focus, preparing tomorrow's leaders for global businesses |
952 |
| 13 |
Borussia Dortmundbvb.de
Football club creating intense experiences, building strong fan loyalty, and striving for sporting success with a direct, open, and combative spirit. |
858 |
| 14 |
Continentale Versicherungsverbundnichtaktiv.de
The company is a part of a strong insurance group, offering a variety of job opportunities and emphasizing individual needs and contributions to company success |
830 |
| 15 |
thyssenkrupp nucerathyssenkrupp-nucera.com
A company specializing in high-efficiency electrolysis plants for green hydrogen production with over 600 projects and 10 gigawatts installed, recently went public and joined SDAX |
811 |
| 16 |
REWE Dortmund SE & Co. KGrewe-dortmund.de
A regional grocery retailer in North Rhine-Westphalia, operating around 400 stores, focusing on supporting local products and communities while providing employment opportunities and training programs |
748 |
| 17 |
Dataciders GmbHdataciders.com
A leading service provider in the German-speaking region, specializing in Data & Analytics solutions to prevent bad decisions, offering end-to-end implementation |
648 |
| 18 |
AOK NordWestaok.de
AOK NordWest is one of the top ten statutory health insurance funds in Germany, advocating for the health of 29 million insured individuals |
614 |
| 19 |
thyssenkrupp rothe erdethyssenkrupp-rotheerde.com
Leading manufacturer of slewing bearings and seamless rolled rings, providing tailor-made solutions for unique applications with a focus on employee development and innovation |
577 |
| 20 |
adesso insurance solutions GmbHadesso-insure.de
Specialized in insurance software solutions, offering a product portfolio covering all insurance lines for private and commercial businesses |
531 |
| 21 |
BAUKING GmbHbauking.de
A leading company in the building materials and wood trade, offering a wide range of products and services to support customers in construction projects |
513 |
| 22 |
HELLWEG Die Profi-Bau- & Gartenmärkte GmbH & Co. KGhellweg.de
A family-owned company with a successful chain of construction and garden markets in Germany and Austria, also operating online shops |
459 |
| 23 |
GEERSkarriere.geers.de
Leading German provider offering specialized hearing solutions, professional consultations, and medical collaboration to improve quality of life through advanced audiology and retail services. |
447 |
| 24 |
Dortmunder Volksbank eGdovoba.de
A unique financial institution where customers are also members, co-owning the bank Founded on trust, responsibility, and customer focus for over 100 years |
446 |
| 25 | 407 | |
| 26 |
Fraunhofer IMLiml.fraunhofer.de
Research institute developing logistics solutions for immediate business use and conducting initial research, focusing on areas like AI, IoT, and transportation systems. |
367 |
| 27 |
Sparkasse Dortmundsparkasse-dortmund.de
A leading financial institution in Dortmund and Schwerte, providing a wide range of financial services to over 330,000 private and 30,000 corporate clients |
359 |
| 28 |
Volkswohl Bund Versicherungenvolkswohl-bund.de
The company offers insurance for private households and businesses, prioritizing customer and employee satisfaction They focus on quality and sustainability |
354 |
| 29 |
Bundesanstalt für Arbeitsschutz und Arbeitsmedizin (BAuA)baua.de
The company conducts interdisciplinary research to promote safe, healthy, and fulfilling work environments, while also providing policy advice and running Germany's largest work exhibition |
345 |
| 30 |
REMIRAremira.com
A leading provider of intelligent supply chain and unified commerce solutions, utilizing AI-supported cloud technology to enhance economic success for retail, logistics, and industrial companies globally |
304 |
| 31 |
proLogistik GmbHprologistik.com
This company specializes in optimizing supply chains through Warehouse Management Systems, Transportation Management Systems, industrial hardware, and a cloud platform for integrated processes |
280 |
| 32 |
Kassenärztliche Vereinigung Westfalen-Lippe (KVWL)kvwl.de
A key player in healthcare, representing over 16,000 doctors in Westfalen-Lippe Ensuring quality medical care, promoting eHealth, negotiating contracts with insurers |
278 |
| 33 |
REDPATH DEILMANN GmbHredpathdeilmann.com
A successful, future-oriented Schachtbauunternehmen specializing in mining and tunnel construction, offering innovative solutions and technical advancements for over 130 years |
261 |
| 34 |
Continentale Versicherungcontinentale.de
German insurance company providing comprehensive coverage for health, life, and property Membership-based, prioritizing responsibility, stability, and long-lasting partnerships with clients, employees, and partners |
254 |
| 35 |
BFS health finance GmbHmeinebfs.de
The company specializes in providing innovative digital solutions and excellent analog services to support healthcare professionals and patients in simplifying healthcare processes and improving financial aspects |
252 |
| 36 |
LEUE & NILL GmbH + Co. KGleueundnill.com
A family-owned international insurance broker providing tailored insurance solutions for corporate clients worldwide, supported by specialists and global networks |
233 |
| 37 |
Teleperformance Germanyteleperformance.de
A global leader in omnichannel customer experience management outsourcing, providing high-quality, specialized services and solutions to enhance customer interactions worldwide |
232 |
| 38 |
Lensing Medialensingmedia.de
A media company with strong partners, Lensing Media connects and informs the region through newspapers, online platforms, digital agencies, and broadcasting |
229 |
| 39 |
NORDWEST Handel AGnordwest.com
A longstanding German wholesale association providing comprehensive services to specialized trade partners, including procurement, IT, finance, logistics, marketing, and sales |
214 |
| 40 |
LWL-Klinik Dortmundlwl-klinik-dortmund.de
Psychiatric hospital located in Dortmund-Aplerbeck, specializing in mental health services and treatment for patients in the Dortmund area |
186 |
| 41 |
RheinBrücke IT Consultingrheincs.com
A leading IT consulting firm in Europe, specializing in consulting, technology, and outsourcing solutions for SMEs in the DACH and BENELUX region |
184 |
| 42 |
Gerber Architektengerberarchitekten.de
With 50 years of experience, we offer expertise in architecture, interior design, engineering, and surveying for various projects worldwide |
182 |
| 43 | 177 | |
| 44 |
Klinikum Dortmundklinikumdo.de
Hospital and Health Care facility situated in Dortmund, Germany, providing medical services and healthcare to individuals in North Rhine-Westphalia |
171 |
| 45 |
Dr. Ausbüttel GmbH & Co. KGdrausbuettel.de
An innovative family-owned company with over 130 years of experience in wound care products, promoting social responsibility, employee development, and community engagement |
169 |
| 46 |
Materna Information & Communicationsmaterna.com
Visit our new profile for information on what we do [Company] specializes in providing services within the industry |
169 |
| 47 |
protel hotelsoftwareprotel.net
This company offers a robust technology stack for hotels worldwide, with a groundbreaking app store and cloud-native PMS solutions Operating globally for 25 years |
166 |
| 48 |
UNIORG Groupuniorg.de
An international full-service provider specializing in SAP solutions, helping companies improve performance and optimize business processes with custom solutions |
163 |
| 49 |
Compleocompleo-charging.com
A leading provider of charging technology in Europe, offering AC and DC charging stations and backend services to business customers |
163 |
| 50 |
Max Planck Institute of Molecular Physiologympi-dortmund.mpg.de
An international team of scientists investigate cellular processes at the molecular level to understand physiology and develop potential new drugs |
160 |
| 51 |
Sozialdienst kath. Frauen e.V.skf-zentrale.de
A women's welfare association of the Catholic Church providing advice, support, and protection to women, families, and individuals in need |
158 |
| 52 |
GREEN IT Das Systemhaus GmbHgreenit.systems
This company is the first green IT system house in Germany, offering sustainable IT solutions nationwide while prioritizing economy, ecology, and environmental protection |
149 |
| 53 |
Kath. St. Paulus Gesellschaftpaulus-gesellschaft.de
The company's network includes 12 hospitals, 4 nursing homes, and a youth welfare facility in the North Rhine-Westphalia region, employing over 9,869 people |
148 |
| 54 |
Webhelp Deutschlandwebhelp.com
The company focuses on making business more human by enhancing customer experiences and providing business solutions for leading brands worldwide |
148 |
| 55 |
MURTFELDTmurtfeldt.de
The Murtfeldt GROUP specializes in non-metallic high-performance materials, providing consulting, design, and manufacturing services across various industries through different specialized companies |
146 |
| 56 |
Dataciders QuinScape GmbHdataciders.com
IT service provider specializing in data optimization for products and business processes, offering expertise in data management, analytics, software engineering, and tailored IT solutions |
140 |
| 57 |
Smart Mechatronics GmbHsmartmechatronics.de
Since 2008, we are a development partner for intelligent, connected systems and innovative products, specializing in software & electronics development, project management, and technical consultancy |
101 |
| 58 |
ISD Software und Systeme GmbHisdgroup.com
Engineering software company offering CAD and PDM solutions to support efficient design processes and industry-specific knowledge for global customers |
97 |
| 59 |
vaylensvaylens.com
The company offers a digital platform for managing charging points, kilowatt-hours, and interconnected systems for eMobility businesses |
96 |
| 60 |
eHealth Experts GmbHehex.de
A leading provider of software integrations with the Telematics Infrastructure in the German healthcare sector, driving digitalization efforts nationwide |
80 |
| 61 |
otris software AGotris.de
It specializes in software solutions for contract management, investment portfolio management, and data protection, enhancing business processes and cost efficiency. |
74 |
| 62 |
Lead Discovery Center GmbHlead-discovery.de
Pharmaceutical research company transforming early-stage projects into animal-proof leads, specializing in small molecule drug discovery through academic partnerships and industry collaborations worldwide |
73 |
| 63 |
Dr. Peters Groupdr-peters.de
A German investment manager specializing in real estate investments, particularly in nursing homes and hotels, with a portfolio of 145 funds |
70 |
| 64 |
Volkswohl Bund Lebensversicherung a.G.volkswohl-bund.de
Insurance company based in Dortmund, Germany, providing life insurance services |
59 |
| 65 |
Overland-Tandberg EMEAoverlandtandberg.com
Global technology company developing hybrid cloud IT infrastructure and data protection solutions for businesses of all sizes worldwide Empowering people for innovation and growth |
56 |
| 66 |
Dortmund Airportdortmund-airport.de
A major commercial airport in North Rhine-Westphalia, centrally located in the Ruhr area, popular among both private and business travelers |
54 |
| 67 |
bitop AG - The Ectoin® Company.bitop.de
A German company specializing in Ectoin® and Glycoin® production for medical devices, cosmetics, and life science industries with proven efficacy |
45 |
| 68 |
Sanitätshaus Tingelhoff GmbHtingelhoff.de
Innovative family-owned Sanitätshaus providing medical supplies, training, and services, focused on growth, health, and supporting the next generation of health professionals |
42 |
| 69 |
German Football Museumfussballmuseum.de
Experience the excitement of German football history at a museum located near Dortmund Main Station |
38 |
| 70 |
MAXIMAGOmaximago.de
MAXIMAGO is a leading solution architect for high-quality software solutions, supporting product positioning, design, implementation, and market launch for clients like Siemens and Microsoft |
37 |
| 71 |
Smartstoresmartstore.com
A leading DXP e-commerce platform offering seamless, personalised experiences for consumers and efficient operations for businesses using Microsoft ASPnet Core |
37 |
| 72 |
Logistikbudelogistikbude.com
Software automates load carrier management, reducing manual bookings and coordination for production, logistics, and retail companies. Pioneer in LCMS. |
32 |
| 73 |
DATATREE AGdatatree.ag
A consulting company specializing in compliance, data protection, and information security, offering services to public and private organizations in Germany and Europe |
24 |
| 74 |
prodexaprodexa.com
A company providing PIM and Omnichannel applications to help manufacturers and dealers manage product information efficiently across multiple output channels |
22 |
| 75 |
Dortmunder Eisenbahn GmbHdortmunderhafen.de
The company operates an industrial and logistics hub in Dortmund, strategically located in Ruhr region, connecting with European transportation network |
21 |
| 76 |
Bank für Kirche und Diakonie eG - KD-Bankkd-bank.de
An investment management company located in Dortmund, Germany, specializing in services for churches and diakonia organizations |
19 |
| 77 |
Weight Doctorsweight-doctors.de
Innovative minimally-invasive medical therapies for weight loss, utilizing advanced endoscopic technology, nutrition, movement, and mindset focus for sustained results |
19 |
| 78 |
DOCERAM GmbHmoeschter-group.com
Specializing in high-performance industrial ceramics as an alternative to metal, focusing on automotive and other industries for increased process reliability and durability |
18 |
| 79 |
VOSS INTERNATIONAL LOGISTIK GMBHvoss-international.com
An international logistics firm with locations in several countries offers transportation of various goods worldwide while adhering to the highest quality standards |
15 |
| 80 |
WDX GmbHwdx-intralogistik.de
Provider of intralogistics solutions, specializing in the planning and implementation of shelving, automated systems, and conveyor systems for various industries |
15 |
| 81 |
CARGOTRANS GmbH & Co. KGcargotrans.de
The company specializes in seamless transport logistics services with a focus on experience, expertise, and a strong network for efficient operations |
14 |
| 82 |
High-Class Fitnesshighclassfitness.de
Premium fitness chain with five locations in Germany, including Dortmund, Cologne, Bad Homburg, Löhne, and Grevenbroich, offering high-class fitness services |
13 |
| 83 |
apano GmbHapano.de
The company provides transparent and profitable investment opportunities outside traditional stock markets, focusing on stability and profitability in all market conditions for clients' wealth building and security |
12 |
| 84 |
b-interaktiveb-interaktive.com
A multinational team based in Germany and Poland creates innovative social games for global audiences, sharing their passion for mobile gaming |
11 |
| 85 |
NEORY GmbHneory.com
An integrated multi-channel marketing platform for online advertising, accurate tracking, retargeting campaigns, and customer behavior insights, simplifying processes for businesses |
9 |
| 86 |
Die Freien Brauerdie-freien-brauer.com
Network of 44 independent, family-owned breweries in Germany, Austria, Luxembourg preserving authentic beer traditions and regional economic health. |
9 |
| 87 |
Collineo Asset Management GmbHcollineo-group.com
We are an independent asset manager specializing in real estate finance, providing funding for project development and existing properties through mezzanine and equity capital |
9 |
| 88 |
integral logistics GmbH & Co. KGintegral.de
A German consultancy company specializing in logistics and supply chain management, serving over 100 customers in retail, automotive, industrial, and LSP industries |
8 |
| 89 |
Neues Schwarz Kaffeeröstereineuesschwarz.de
Specializing in light roasted single origin coffees, this German-based company Neues Schwarz GmbH is a specialty coffee roastery located in Dortmund |
7 |
| 90 |
bms GmbHbms-gmbh.com
IT experts specializing in mobile solutions, bridging ERP systems with intuitive applications for enhanced productivity Standardized user interface streamlines workflow for efficiency |
7 |
| 91 |
Intergem GmbHintergem.pl
A newly established company offering a wide range of haulage services in Poland and Germany, catering to the growing transport and logistics markets |
6 |
| 92 |
ILD VA-LOGserv GmbH & Co. KGild-va-logserv.de
The company in Dortmund has been providing open-door logistics solutions for customers since 2000, emphasizing personalized service and customer satisfaction |
5 |
| 93 |
eternos cargo & logistics GmbHeternos-logistics.com
The company offers customized end-to-end global logistics solutions, combining land, air, and ocean freight services with tailored IT systems for efficient supply chain management |
5 |
| 94 |
Homeporthomeport.ai
An AI platform that helps companies integrate secure and privacy-focused AI, bringing data to life. It is developed by a leading IT consulting firm. |
4 |
| 95 |
Spedition Rüdiger Frickespedition-fricke.de
Logistics and transportation specialist for high-tech products, providing expert delivery services for technology companies |
2 |
| 96 |
Galerie Utermanngalerieutermann.de
Art gallery showcasing German Expressionism, Modern, Postwar, and Contemporary Art since 1853 |
2 |
| 97 |
DatenLabeldatenlabel.com
Specializing in data labeling, quality assurance, and AI consulting for enterprises, this company helps drive successful AI projects through efficient pipelines and tools |
2 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 9, 2026.
The same list elsewhere in Germany
- The largest companies in Germany 13,485
- The largest companies in Berlin 1,477
- The largest companies in Munich 957
- The largest companies in Hamburg 824
- The largest companies in Frankfurt 475
- The largest companies in Cologne 417
- The largest companies in Düsseldorf 307
- The largest companies in Stuttgart 266
- The largest companies in Bremen 177
- The largest companies in Hanover 140
- The largest companies in Bonn 135
- The largest companies in Nuremberg 132
- The largest companies in Karlsruhe 120
- The largest companies in Essen 112
- The largest companies in Mannheim 106
- The largest companies in Aachen 89
- The largest companies in Leipzig 80
- The largest companies in Dresden 79