Holding(s) in Company

BP p.l.c. received on 24 September 2012 from The Capital Group Companies, Inc. a notification of their interest in BP ordinary shares and American Depositary Receipts dated 4 September 2012. The disclosure of their interest in accordance with DTR5 is below. This notice is given in fulfillment of BP p.l.c's obligation under DTR 5.8.12.

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

BP p.l.c.

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

Due to a company reorganization, Capital Research and Management Company ("CRMC") and Capital Group International, Inc. ("CGII") will no longer report relevant holdings under management separately. Instead the relevant holdings under management by CRMC and CGII will be reported in aggregate by The Capital Group Companies, Inc. ("CGC"). It is solely for this reason (and not as a result of any additional acquisition or disposal) that CGC is reporting this aggregated holding to the issuer.

x

3. Full name of person(s) subject to thenotification obligation: iii

The Capital Group Companies, Inc.

4. Full name of shareholder(s)  (if different from 3.):iv

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

1 September 2012

6. Date on which issuer notified:

24 September 2012

7. Threshold(s) that is/are crossed orreached: vi, vii

Above 3%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Indirect

Direct xi

Indirect xii

Direct

Indirect

609,649,091

609,649,091

609,649,091

609,649,091

3.19885%

Ordinary shares

(GB0007980591)

American Depositary Receipts

(US0556221044)

9,998,162

ADRs

59,988,972

9,998,162

ADRs

59,988,972

0.31476%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

N/A

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

669,638,063

3.5136%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi

Number of shares Percentage

The Capital Group Companies, Inc. ("CG" holdings) 669,638,063 3.5136%

Holdings broken down:

Capital Guardian Trust Company 49,854 0.0003%

Capital Research and Management Company 669,588,209 3.5133%

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will ceaseto hold:

N/A

12. Date on which proxy holder will cease to holdvoting rights:

N/A

13. Additional information:

N/A

14. Contact name:

Hannah Ashdown

15. Contact telephone number:

0207 496 4531

Note: Annex should only be submitted to the FSA not the issuer

Annex: Notification of major interests in share

A: Identity of the persons or legal entity subject to the notification obligation

Full name

(including legal form of legal entities)

The Capital Group Companies, Inc.

Contact address

(registered office for legal entities)

333 South Hope Street, 55th Floor, Los Angeles,

California 90071

Phone number & email

(213) 615 0469

[email protected]

Other useful information

(at least legal representative for legal persons)

B: Identity of the notifier, if applicable

Full name

Gina Martinez

Contact address

333 South Hope Street, 55th Floor, Los Angeles,

California 90071

Phone number & email

(213) 615 0469

Other useful information

(e.g. functional relationship with the person or legal entity subject to the notification obligation)

Fax: (213) 615 4056

C: Additional information

Due to a company reorganization, Capital Research and Management Company ("CRMC") and Capital Group International, Inc. ("CGII") will no longer report relevant holdings under management separately. With effect from 1 September 2012, the holdings under management of CRMC and CGII will be reported in aggregate by the group's parent company, The Capital Group Companies, Inc.

For notes on how to complete form TR-1 please see the FSA website.