3U HOLDING AG: selfio.de named "Industry Champion" in the DtGV Customer Award 2022/23

Marburg (pta006/08.02.2023/07:00 UTC+1)

• 1st place for selfio.de in the category "Customer satisfaction" among online suppliers for heating technology
• 3rd place for "Price-performance ratio"

The online shop selfio.de, operated by Selfio GmbH, a subsidiary of 3U HOLDING AG (ISIN DE0005167902), received several awards in this year's German Customer Awards of the DtGV (German Association for Consumer Studies mbH, Berlin). The study results show that selfio.de is one of the best online providers of heating systems from the point of view of the customers surveyed. In the category "Customer Satisfaction", selfio.de took 1st place and was thus named the industry champion. In the "price-performance ratio" category, selfio.de ranked third.

The DtGV evaluation was based on more than 339,000 customer opinions on a total of 2,589 companies from 258 sectors. For the online survey, the panel lists were selected according to socio-demographic characteristics so that they represented a representative cross-section of the population. Only ratings from people who were actually customers of the rated company in the last three years were included.

The largest and most important providers in the respective industry are represented among the participating companies. They were determined by DtGV in its own research and were not themselves involved in the survey. The evaluation took into account companies for which at least 100 evaluations were submitted.

"At selfio.de, customers not only find state-of-the-art home technology, but also support for their project - and that already from the planning phase," Selfio Managing Director Roger Moore emphasises. "Unlike many other online shops, our well-trained employees can also be reached by phone and have one or two tips from practical experience at the ready. This has certainly been an important factor for the excellent rating."

About 3U:
3U HOLDING AG (www.3u.net) has its headquarters in Marburg, Germany, and was founded in 1997. It is the operating management and investment holding company at the head of the 3U Group. For the purpose of increasing value for its shareholders, employees, customers, suppliers and all stakeholders, it acquires, operates and sells companies in the three segments ITC (Information and Telecommunications Technology), Renewable Energies and SHAC (Sanitary, Heating and Air Conditioning Technology).The 3U Group has successful and profitable business models based on megatrends in all three segments and is striving to achieve leading positions in the market, in particular with its e-commerce business area.

3U HOLDING AG's shares are traded on XETRA, Tradegate and on the German regional stock exchanges (ISIN: DE0005167902; identifier: UUU).

About Selfio:

Selfio GmbH is a supplier of high-quality home technology products with a focus on plumbing, heating, air conditioning (SHK) and products such as underfloor heating, controlled domestic ventilation and water treatment as well as heat pumps, solar thermal systems, pumps and chimneys. Selfio supports DIY enthusiasts and do-it-yourselfers in projects with its professional planning service for both new construction and renovation projects. In addition, Selfio provides extensive video tutorials and product presentations and, in combination with its technical pre-calculations (quick designs), offers services for everyone.

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Emitter:	3U HOLDING AG Frauenbergstraße 31-33 35039 Marburg Germany
Contact Person:	Dr. Joachim Fleing
Phone:	+49 6421 999-1200
E-Mail:	IR@3U.net
Website:	www.3u.net
ISIN(s):	DE0005167902 (Share)
Stock Exchange(s):	Regulated Market in Frankfurt; Free Market in Berlin, Dusseldorf, Hamburg, Munich, Stuttgart, Tradegate