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: 5 October 2015

Number of Ordinary Shares purchased: 9,040

Price per Ordinary Share: 22.4780

The purchased shares will be held as treasury shares.

Following the above transaction, Severn Trent holds a total of 2,879,333 of its ordinary shares in treasury and has 236,433,568 ordinary shares in issue (excluding treasury shares).

Contact:

David Lloyd-Seed

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.