Prudential Regulatory News (PRU)

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

Tullow Oil Plc

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

An acquisition or disposal of voting rights

X

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):

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

Prudential plc group of companies

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

Prudential plc

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

12 June 2017

6. Date on which issuer notified:

13 June 2017

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

5%

8. Notified details:

A: Voting rights attached to shares

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

Indirect

Direct

Indirect

ORD GBP0.10

GB0001500809

68,131,112

68,131,112

69,271,752

0

69,271,752

0

5.00%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/Conversion Period

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

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date

Exercise/Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

69,271,752

5.00%

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

Prudential plc (parent Company) - 69,271,752 (5.00%)

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will cease to hold:

N/A

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

N/A

13. Additional information:

14. Contact name:

John Baker / James Todd

M&G Investment Management Limited

15. Contact telephone number:

020 7548 2561 / 020 7548 2293