DGAP-CMS: United Internet AG: Release of a capital market information

United Internet AG: Disclosure pursuant to Art. 5 Sec. 1 b) and Sec. 3 of the Regulation (EU) No 596/2014 (MAR) in conjunction with Art. 2 Sec. 2 and Sec. 3 of the Commission Delegated Regulation (EU) No 2016/1052 // Share Buyback - 3rd Interim Announcement

In the period from August 26, 2019 up to and including August 30, 2019, United Internet AG purchased a total of 200,000 treasury shares as part of the share buyback program. In the announcement of
15 August 2019 as provided for in Art. 2 sec. 1 of the Commission Delegated Regulation (EU) 2016/1052, it was communicated that the share buyback would commence on 16 August 2019.

Shares were bought as follows:

Therefore, the overall volume of the shares bought back by United Internet AG through the share buyback program since August 16, 2019 is 639,866 shares.

Further information pursuant to Art. 5 sec. 1 b) and sec. 3 of the Regulation (EU) No 596/2014 in conjunction with Art. 2 sec. 2 and sec. 3 of the Commission Delegated Regulation (EU) No 2016/1052 is available online via https://www.united-internet.de/en/investor-relations/share/share-buyback.html.

The purchase of the United Internet AG shares was carried out by a bank mandated by United Internet AG exclusively via the Frankfurt Stock Exchange (XETRA trading).

Montabaur, September 2, 2019

United Internet AG

The Executive Board