Transaction in Own Shares

BP p.l.c.

Transaction in own shares

BP p.l.c. announces that on 15 December 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: 15 December 2011

Number of ordinary shares transferred: 614,420

Transfer price per share: £4.5205

Following the above transfer, BP p.l.c. holds 1,838,014,874 ordinary shares in treasury, and has 18,963,942,440 ordinary shares in issue (excluding treasury shares).

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