TR-1: Notification of Major Interest in Shares

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

Canadian Overseas Petroleum Limited

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): Admission to trading on LSE

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

Capital Research and Management Company

American Funds Insurance Series Global Small Capitalization Fund

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

4 April 2014

6. Date on which issuer notified:

7 April 2014

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

Above 5%

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

Direct

Direct xi

Indirect xii

Direct

Indirect

Common Shares (CA13643D1078)

22,720,000

22,720,000

22,720,000

6.464%

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

N/A

N/A

N/A

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

N/A

N/A

N/A

N/A

Nominal

Delta

N/A

N/A

Total (A+B+C)

Number of voting rights

Percentage of voting rights

22,720,000

6.464%

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

Capital Research and Management Company

American Funds Insurance Series Global Small Capitalization Fund

Proxy Voting:

10. Name of the proxy holder:

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:

Based on total voting rights of 351,495,497

14. Contact name:

Vivien Tan

15. Contact telephone number:

1.213.615.0469