Transaction in Own Shares

BP p.l.c. - Transaction in Own Shares

BP p.l.c. - 21 September 2010

BP p.l.c. announces that it transferred 16,271 ordinary shares on 20 September 2010, and 4,241 ordinary shares on 16 September to participants in its employee share schemes at prices between 394.0 pence per share and 441.0 pence per share. These shares were previously held as treasury shares.

Following the above transaction, BP p.l.c. holds 1,855,575,701 ordinary shares in Treasury, and has 18,791,540,565 ordinary shares in issue (excluding Treasury shares).

Enquiries: Fergus MacLeod, BP p.l.c. Tel: 020 7496 4632