Transaction in Own Shares

BP PLC
18 July 2006


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 18 July 2006

BP p.l.c. announces that on 17 July 2006, it purchased 9,370,265 ordinary shares
at prices between 638.5 pence and 646.0 pence per share and between 1150.50
cents and 1162.50 cents. The purchased shares will all be held as Treasury
shares.

Following the above transaction, BP p.l.c. holds 1,787,353,276 ordinary shares
in Treasury, and has 19,908,555,051 ordinary shares in issue (excluding Treasury
shares).

Enquiries: Fergus MacLeod, BP p.l.c. Tel : [phone]



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