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Top 25 critical infrastructure operators in Schleswig-Holstein

Tamtam tracks 25 critical infrastructure operators headquartered in Schleswig-Holstein. This list ranks all of them by number of employees on LinkedIn, led by Oldendorff Carriers GmbH & Co. KG, TT-Line and Schleswig-Holstein Netz GmbH. Their median headcount is 278. Half of them were founded in 1992 or later. The most common headquarters are Flensburg (3) and Lübeck (3).

🇩🇪 Schleswig-Holstein25 companiesUpdated Nov 2, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Oldendorff Carriers GmbH & Co. KGoldendorff.com

A leading German drybulk operator, with a history dating back to 1921, transporting around 330 million tons of raw materials annually worldwide

Maritime Transportation 🇩🇪 Lübeck 1,856 1921
2
TT-Linettline.com

A transportation company providing reliable and environmentally friendly ferry services connecting Germany, Sweden, Poland, Lithuania, and Karlshamn with innovative digital solutions

Maritime Transportation 🇩🇪 Lübeck-Travemünde 570 1962
3
Schleswig-Holstein Netz GmbHsh-netz.com

Supplier of electricity and gas in Schleswig-Holstein, advancing renewable energy integration Provides services for energy networks, offshore wind farms, and more

Utilities 🇩🇪 Quickborn 540 n/a
4
GP JOULEgp-joule.com

Integrated energy supplier providing renewable energy solutions throughout the entire value chain, from generation to consumption, with a focus on sustainability and independence

Renewable Energy Power Generation 🇩🇪 Reußenköge 468 2009
5
FRSfrs.world

An internationally active group in passenger shipping, FRS operates over 70 vessels in 14 countries, prioritizing teamwork and employee development

Transportation, Logistics, Supply Chain and Storage 🇩🇪 Flensburg 462 1991
6
freenet AGfreenet.ag

Largest independent telecommunications provider in Germany offering mobile voice and data services with a focus on stakeholder responsibility.

Telecommunications 🇩🇪 Büdelsdorf 430 2007
7
Sparkasse Südholsteinspk-suedholstein.de

A regional public bank in Schleswig-Holstein providing financial services to private, commercial, and municipal clients in its area of operation

Banking 🇩🇪 Neumünster 384 2003
8
freenet DLS GmbHfreenet.de

The company offers a variety of telecommunications services including mobile phones, internet, TV entertainment, and accessories

Telecommunications 🇩🇪 Büdelsdorf 377 1992
9
Förde Sparkassefoerde-sparkasse.de

A leading financial institution in the region, offering banking services to individuals and businesses, providing expertise in loans, support for entrepreneurs, and professional training opportunities

Financial Services 🇩🇪 Kiel 374 n/a
10
Sparkasse Holsteinsparkasse-holstein.de

A strong financial service provider with over 9 billion euros in assets and 1,000 employees, dedicated to improving the lives of over 250,000 customers

Banking 🇩🇪 Bad Oldesloe 370 1824
11
comdirect – eine Marke der Commerzbank AGcomdirect.de

Leading direct bank offering brokerage, banking, and advisory services with a strong online presence and comprehensive financial information platform.

Banking 🇩🇪 Quickborn 370 1994
12
Investitionsbank Schleswig-Holstein (IB.SH)ib-sh.de

The company in Schleswig-Holstein provides advice, funding, and support for individuals, businesses, and municipalities to promote sustainable growth and improve living conditions in the region

Banking 🇩🇪 Kiel 294 2003
13
VR Bank Schleswig-Holstein Mittevrbank-sh-mitte.de

A cooperative bank in Schleswig-Holstein, serving southern Nordfriesland, northeastern Dithmarschen, and Handewitt region with innovative services, member-focused approach, and community support

Banking 🇩🇪 Osterrönfeld 278 2025
14
HanseWerk-Gruppehansewerk.com

A major energy service provider in Northern Germany, committed to climate protection through energy services and efficient biogas-based plants

Utilities 🇩🇪 Quickborn 252 2014
15
ORLEN Deutschland GmbHorlen-deutschland.de

International energy company emphasizing innovation, employee development, respectful culture, flexible work, diversity, and family-friendly policies for sustainable growth.

Oil and Gas 🇩🇪 Elmshorn 207 2003
16
Itzehoer Versicherungenitzehoer.de

A mutual insurance company providing comprehensive insurance coverage and personalized advice for over 115 years in the northern region Supporting cultural events and promoting community involvement

Insurance 🇩🇪 Itzehoe 207 1906
17
Sparkasse zu Lübeck AGspk-luebeck.de

A modern and future-oriented bank with over 200 years of history, focusing on customer and employee satisfaction, while embracing innovation and personal development

Financial Services 🇩🇪 Lübeck 192 1817
18
Nord-Ostsee Sparkassenospa.de

A reliable financial partner and advisor in the North Sea region, supporting local projects and community involvement with over 800 employees

Banking 🇩🇪 Flensburg 191 n/a
19
team energie GmbH & Co. KGteam.de

The company provides a wide range of energy products and services including fossil and synthetic fuels, heating oil, eco-electricity, eco-gas, and lubricants

Utilities 🇩🇪 Flensburg 185 n/a
20
Kreissparkasse Herzogtum Lauenburgksk-ratzeburg.de

A banking company in Germany, located in Schleswig-Holstein, that provides financial services from its office in Ratzeburg

Banking 🇩🇪 Mölln 143 n/a
21
Kieler Volksbank eGkieler-volksbank.de

The company provides personalized financial services to over 25,000 members, offering a wide range of banking products and a strong community commitment

Banking 🇩🇪 Kiel 143 1897
22
Anhalt Logisticsanhalt.de

A family-owned logistics company specializing in transporting liquids with over 600 units and 550 employees, providing reliable and safe solutions across Europe

Transportation, Logistics, Supply Chain and Storage 🇩🇪 Rehm-Flehde-Bargen 60 1969
23
VR Bank Schleswig-Mittelholstein eGvr-sl-mh.de

This company stands out for its unique cooperative business model in the banking industry, offering benefits to its members

Financial Services 🇩🇪 Osterrönfeld 36 n/a
24
Chr. Carstensen Logisticscarstensen.eu

A fifth generation family business based near Flensburg, specializing in delivering goods internationally with over a century of experience in logistics

Transportation, Logistics, Supply Chain and Storage 🇩🇪 Handewitt 31 1892
25
Herrentunnel Lübeckherrentunnel.de

Operates a toll tunnel facilitating quicker travel between Travemünde and Lübeck, providing various payment options and customer services for motorists.

Business Consulting and Services 🇩🇪 Lübeck 2 n/a

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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 Nov 2, 2026.

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The same list elsewhere in Germany