Transaction in Own Shares

BP p.l.c.

Transaction in own shares

BP p.l.c. announces that on 13 April 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: 13 April 2012

Number of ordinary shares transferred: 625,464

Transfer price per share: £4.561

Following the above transfer, BP p.l.c. holds 1,834,063,474 ordinary shares in treasury, and has 19,020,911,581 ordinary shares in issue (excluding treasury shares).

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