Transaction in Own Shares

BP p.l.c.

Transaction in own shares

BP p.l.c. announces that on 10 August 2012 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: 10 August 2012

Number of ordinary shares transferred: 654,441

Transfer price per share: £4.489

Following the above transfer, BP p.l.c. holds 1,830,589,355 ordinary shares in treasury, and has 19,035,816,982 ordinary shares in issue (excluding treasury shares).

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