Transaction in Own Shares

SEVERN TRENT PLC

TRANSACTION IN OWN SECURITIES

Severn Trent Plc ("Severn Trent") announces today that it has purchased the following number of its ordinary shares of 97 17/19 pence each ("Ordinary Shares") on the London Stock Exchange from Morgan Stanley & Co. International PLC. Such purchase was effected pursuant to irrevocable instructions issued by Severn Trent to Morgan Stanley & Co. International PLC on 13 February 2015, as announced on the same day:

Ordinary Shares

Date of purchase: 17 September 2015

Number of Ordinary Shares purchased: 16,312

Price per Ordinary Share: 21.0728

The purchased shares will be held as treasury shares.

Following the above transaction, Severn Trent holds a total of 2,723,275 of its ordinary shares in treasury and has 236,587,034 ordinary shares in issue (excluding treasury shares).

Contact:

John Crosse

Head of Investor Relations

02477 715000

This announcement does not constitute, or form part of, an offer or any solicitation of an offer for securities in any jurisdiction.