Transaction in Own Shares

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

BP p.l.c. - 21 December 2010

BP p.l.c. announces that it transferred to participants in its employee share schemes 20,059ordinary shares on 20 December 2010 at prices between 441.0 pence and 455.0 pence per share. These shares were previously held as treasury shares.

Following the above transaction, BP p.l.c. holds 1,850,761,134 ordinary shares in Treasury, and has 18,796,398,932 ordinary shares in issue (excluding Treasury shares).

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