Transaction in Own Shares

BP p.l.c.

Transaction in own shares

BP p.l.c. announces that on 3 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: 3 April 2012

Number of ordinary shares transferred: 536,196

Transfer price per share: £4.625

Following the above transfer, BP p.l.c. holds 1,834,692,120 ordinary shares in treasury, and has 18,980,686,879 ordinary shares in issue (excluding treasury shares).

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