Transaction in Own Shares

BP p.l.c.

Transaction in own shares

BP p.l.c. announces that on 22 April 2013 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: 22 April 2013

Number of ordinary shares transferred: 13,759

Highest transfer price per share: £3.94

Lowest transfer price per share: £3.16

Following the above transfer, BP p.l.c. holds 1,809,597,094 ordinary shares in treasury, and has 19,096,286,580 ordinary shares in issue (excluding treasury shares).

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