Transaction in Own Shares

BP p.l.c.

Transaction in own shares

BP p.l.c. announces that on 31 October 2011 it transferred the following number of ordinary shares, which were previously held as treasury shares, to participants in its employee share schemes:

Date of transfer: 31 October 2011

Number of ordinary shares transferred: 3,167

Highest transfer price per share: £5.00

Lowest transfer price per share: £4.87

Following the above transfer, BP p.l.c. holds 1,841,955,927 ordinary shares in treasury, and has 18,959,903,137 ordinary shares in issue (excluding treasury shares).

This announcement is made in accordance with the requirements of Listing Rule 12.6.4.