3U HOLDING AG: Management Board announces new forecast and corporate actions

• Management Board announces new forecast for the fiscal years 2011 and 2012

• Capital reduction will be registered with the commercial register following AGM

• Management and Supervisory Board decide on a new share buyback

Marburg, May 26, 2011 – 3U HOLDING AG (ISIN DE0005167902) will provide information on their annual general meeting concerning the last financial year and present an updated outlook for fiscal years 2011 and 2012.

In the annual report 2010 the Management Board of 3U HOLDING AG expected sales of about EUR 100 to 110 million, EBITDA of EUR 12.0 to 14.0 million and earnings of about EUR 4.0 to 5.5 million in fiscal year 2011. For 2012, the Board anticipated sales of between EUR 105 and 120 million, EBITDA between EUR 13.0 and 15.0 million and earnings of between EUR 4.5 to 6.0 million.

With the sale of LambdaNet these forecasts have become obsolete. The new forecast for the current year includes the sales and profit contribution of LambdaNet for the months January to May, but not those from June to December 2011. For the year 2012, lower sales than in 2011 are expected because in the coming year no sales of LambdaNet are consolidated.

That said, the Management Board of 3U HOLDING AG expects sales of about EUR 85 and EUR 95 million, EBITDA of EUR 5 to 7 million and earnings of about EUR 26 to EUR 28 million in fiscal year 2011. It has to be taken into account that the sale of LambdaNet contributes with approximately EUR 25 million to earnings.

For 2012, the Board anticipates sales of between EUR 62 and 77 million, EBITDA between EUR 1 and 3 million and earnings of between EUR 0.5 to 1.5 million.

In addition, the Management Board with the approval of the Supervisory Board decided to submit 4,359,740 own shares (which corresponds to 10.00 % of the nominal capital) for withdrawal at the trade register. The Company obtained those shares within the latest share buyback via the stock exchange and through a compromise settlement. With the withdrawal increases the company value attributable to each share and it also opens up the possibility for further share buybacks.

3U HOLDING AG will use this opportunity in the interest of shareholders and start another share buyback program on the exchange short term.

The speech and presentation of the Management Board will be released after today’s AGM on the 3U website.

Contact:

Peter Alex

Head of Investor Relations

3U HOLDING AG

Frauenbergstraße 31–33

35039 Marburg

Tel.: +49 6421 999-1200

Fax: +49 6421 999-1222

E-Mail: ir@3u.net

3U HOLDING AG: Sale of Subsidiary LambdaNet

Marburg, May 19, 2011 – 3U HOLDING AG (ISIN DE0005167902) sold its Subsidiary LambdaNet Communications AG, Germany including the Austrian and Czech subsidiaries to euNetworks GmbH, a subsidiary of euNetworks Group Limited. The contract was signed today. The transaction is expected to be completed in the first half of 2011.

The purchase price is in the range of the book value of the sold shares. In addition, euNetworks assumes the liabilities of LambdaNet towards 3U HOLDING AG. In total 3U HOLDING AG receives liquid funds of approximately EUR 27 million in this transaction. The liabilities assumed by euNetworks amount to EUR 7.8 million. The closing of the transaction is scheduled for May 31, 2011.

LambdaNet accounted for sales of EUR 36.78 million and EBITDA in the amount of EUR 9.67 million in the fiscal year 2010. For fiscal year 2011 sales of EUR 37.07 million and EBITDA of EUR 10.14 million are planned.

The sale of LambdaNet does not mean that 3U HOLDING AG renounces its strategic goal, to offer as many services for the infrastructure of buildings – such as energy supply from renewable energy, broadband and telecommunications services – in the future. Instead, LambdaNet has won a strong partner in euNetworks and will rely on their expanded product and service portfolio as well. Consequently, LambdaNet’s customers are also among the profiteers of this transaction.

The Management Board will give an updated outlook for the current fiscal year on May 26, 2011, the date of the next Annual General Meeting.

About LambdaNet Communications Deutschland AG

LambdaNet Communications Deutschland AG is a premier provider of telecommunication and internet services. Founded in 1999 and headquartered in Hanover, Germany, LambdaNet was bought by 3U in April 2004. Well-known customers, namely network operators, internet service providers, industrial corporations, banks and insurances, service providers and retailers rely on LambdaNet’s services. LambdaNet operates one of the most sophisticated fibre-optic and IP/MPLS networks in Europe, covering more than 40 cities in 11 countries, including metropolitan networks to 5 major European business centres. LambdaNet provides global VPN solutions based on a network of cooperation partners. The company’s service portfolio includes state-of-the-art IP/MPLS data services, high-availability internet services, integrated voice services, bandwidth transmission services up to 10 Gigabit per second as well as hosting services based on LambdaNet’s 25 data centres. LambdaNet’s information security management system is certified according to ISO 27001 since 2007.

About euNetworks Group Limited

euNetworks Group Limited (SGX: H23:SI) is a bandwidth infrastructure provider, owning and operating 13 fibre based metropolitan networks across Europe connected with a high capacity intercity backbone. The Company offers a portfolio of metro and longhaul Ethernet and Internet Protocol services including dark fibre, dedicated fibre, wavelength, Ethernet, and Internet. Enterprise and carrier customers benefit from euNetworks’ unique inventory of fibre and duct based assets that are tailored to fulfil their high bandwidth needs.

euNetworks Group Limited is headquartered in London and publicly listed on the Singapore Stock Exchange.

Contact:

Peter Alex

Head of Investor Relations

3U HOLDING AG

Frauenbergstraße 31–33

35039 Marburg

Tel.: +49 6421 999-1200

Fax: +49 6421 999-1222

E-Mail: ir@3u.net