COMPANY & CULTURE

THE WAY WE CONNECT

We create the conditions for this with our solutions: We create connections, we open spaces for exchange and bring people together.

With almost 30 years of experience and expertise, 3U TELECOM is a constant partner within the network of leading telecommunication providers – competent, pioneering, and sustainable.

3U TELECOM PORTFOLIO
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3U TELECOM GMBH

3U TELECOM GmbH is a subsidiary of the listed 3U HOLDING AG, which was founded in 2007 and continues the telecommunication division that has existed since 1997. In addition to voice services such as fixed-line telephony, the service portfolio also includes areas for data centers and network infrastructure. This makes 3U TELECOM one of several companies anchored in the Group’s ICT segment (information and communications technology).

People of Board

UWE KNOKE

CEO

CHRISTOPH HELLRUNG

CFO

JOERG DIESSNER

Director IT &
Telecommunication

BJOERN FRIEDRICHSEN

Director Sales & Product Management

Grafik mit dem Text 3U PEOPLE FOCUS FUTURE auf dunklem Hintergrund, der eine moderne und zukunftsorientierte Botschaft vermittelt.

Our leadership roles are characterized by the guiding principle PEOPLE FOCUS FUTURE.

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3U TELECOM is part of

3U GROUP

3U HOLDING AG is a successful and profitable operating management and investment company in megatrends. It holds investments in the Information and Communications Technology (ICT), Renewable Energies and Sanitary, Heating and Air Conditioning Technology (HVAC) segments.

3U HOLDING AG is at the head of the 3U GROUP and is shaping the future of the Group with vision. With a clear focus on innovation, growth, and responsibility, it ensures our long-term stability and success.

RENEWABLE ENERGIES

 

A future worth living in requires responsibility – for resources, for our planet, for future generations. We see the generation of sustainable energy as a duty with prospects.

With around 43 MW from three wind farms and 10 MWp from a solar park, we are making our contribution – an average of around 70,000 MWh of electricity per year. By deploying state-of-the-art wind turbines (‘repowering’), we are systematically expanding our output and yield. In addition to the project companies, three larger subsidiaries are particularly active in the Renewable Energies segment.

SANITARY, HEATING, AIR CONDITIONING

 

Comfort begins at home – and in the digital space. Online retail is changing the way we live: Heating systems are planned, ordered, and often installed online. We do not only supply products, but also the necessary know-how.

As one of the leading providers of underfloor heating in online retail, we also offer solutions for ventilation, water management, and energy-efficient building technology. Specialized subsidiaries are active in this area.

Our focus: carbon-free heating and sustainable technology for the homes of tomorrow.

INFORMATION & TELECOMMUNICATION TECHNOLOGY

 

People are at the heart of every digital connection. Our ICT solutions create secure, flexible structures for collaboration, exchange, and progress. Several specialized subsidiaries are working to make digitalization tangible – with a focus on IT security, modern network technologies and future-proof services.

HISTORY OF A COMPANY

1997
1999
2001
2003
2004
2007
2013
2016
2019
2023
2025
Logo in orange mit modernen geometrischen Formen, das für Kreativität und Innovation steht. Ideal für Marken, die ein dynamisches und zeitgemäßes Image vermitteln möchten.

1997

3U HOLDING AG is founded as 3U Telekommunikation GmbH with the business purpose of ‘carrier network operator’.

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1999

The company is renamed a stock corporation and is listed for the first time on the Neuer Markt of the Frankfurt Stock Exchange on November 25.

Logo in orange mit modernen geometrischen Formen, das für Kreativität und Innovation steht. Ideal für Marken, die ein dynamisches und zeitgemäßes Image vermitteln möchten.

2001

The Annual General Meeting decides to change the company name to 3U TELECOM AG. The decisive factor for this is the company’s progressive expansion abroad, during which 3U starts operating as a carrier network operator in Switzerland, Austria, the Netherlands, Italy, France, the USA, Belgium, Luxembourg, and Great Britain from 2000 to 2004.

Logo in orange mit modernen geometrischen Formen, das für Kreativität und Innovation steht. Ideal für Marken, die ein dynamisches und zeitgemäßes Image vermitteln möchten.

2003

The 3U share is listed in the ‘Prime Standard’ segment. 3U TELECOM AG continues its growth course with the acquisition of the OneTel brand, which is successfully established in the German market as a network operator for voice telephony in the private and business customer segment with the network operator code 01086.

Logo in orange mit modernen geometrischen Formen, das für Kreativität und Innovation steht. Ideal für Marken, die ein dynamisches und zeitgemäßes Image vermitteln möchten.

2004

3U TELECOM AG taps into considerable growth potential in the expanding IP/broadband sector with the acquisition of LambdaNet Communications Deutschland AG. In addition, a new offer gains further telephone customers: The subsidiary fon4U enters the market with the operator code 01053.

Logo in orange mit modernen geometrischen Formen, das für Kreativität und Innovation steht. Ideal für Marken, die ein dynamisches und zeitgemäßes Image vermitteln möchten.

2007

The Extraordinary General Meeting decides to position 3U TELECOM AG as a management and investment holding company in the future. Since November 1, 2007, 3U TELECOM AG has been operating under the name 3U HOLDING AG. The telecommunication services are spun off and transferred to a new wholly owned subsidiary, 3U TELECOM GmbH.
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2013

The activities in the field of data center services will be intensified and, in addition to the two locations in Marburg and Frankfurt, two further data centers will be acquired in Berlin and Hanover.

Logo in orange mit modernen geometrischen Formen, das für Kreativität und Innovation steht. Ideal für Marken, die ein dynamisches und zeitgemäßes Image vermitteln möchten.

2016

3U TELECOM GmbH manages to generate more sales with new business areas (Voice Business Customers, Data Center Services) than with the traditional Voice Retail business for the first time.

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2019

3U TELECOM GmbH puts its powerful Next Generation Network into operation

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2023

3U HOLDING AG acquires a new property from the city of Marburg with an area of around 3,200 square meters in the Cappel district, where 3U TELECOM will also find its new home. A corresponding purchase agreement was concluded on April 20, 2023. The new company headquarters will be built on the site. 3U will operate the building in a CO2-neutral manner. In addition to the installation of sustainable heating and cooling systems, there are also plans to install a large photovoltaic system on the roof.

The acquisition of sister company cs communication systems GmbH (brand name CITRUS for the expansion of the ICT segment) will take place.

Logo in orange mit modernen geometrischen Formen, das für Kreativität und Innovation steht. Ideal für Marken, die ein dynamisches und zeitgemäßes Image vermitteln möchten.

2025

Relocation to the new 3U company headquarters in Marburg-Cappel.

OUR LOCATIONS IN THE FIELD OF
INFORMATION AND COMMUNICATION TECHNOLOGY

Marburg

Headquarters

LUDWIGSBURG

Office CITRUS

HANNOVER

Office & Data Center

BERLIN

Data Center

Leipzig

Office

Nuremberg

Office