Transaction in Own Shares

BP p.l.c.

Transaction in own shares

BP p.l.c. announces that on 15 March 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: 15 March 2012

Number of ordinary shares transferred: 575,795

Transfer price per ordinary share: 574,590 at £4.939 and 1,205 at £3.94

Following the above transfer, BP p.l.c. holds 1,835,237,786 ordinary shares in treasury and has 18,980,114,813 ordinary shares in issue (excluding treasury shares).

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