Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

TULLOW OIL PLC

0150080

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

An acquisition or disposal of voting rights

Yes

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

No

Other (please specify):

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

Majedie Asset Management Limited

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

MAJEDIE UK EQUITY FUND, MAJEDIE UK FOCUS FUND, MAJEDIE ASSET MANAGEMENT UK EQUITY FUND, MAJEDIE INSTITUTIONAL TRUST, MAJEDIE ASSET MANAGEMENT TORTOISE FUND, MAJEDIE TORTOISE FUND, MAJEDIE GLOBAL EQUITY FUND, MAJEDIE GLOBAL FOCUS FUND, DISCRETIONARY PORTFOLIOS

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

17 March 2017

6. Date on which issuer notified:

20 March 2017

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

Below 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

GB0001500809

56975322

56975322

29209276

3.20

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

29209276

3.20

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

Proxy Voting:

10. Name of the proxy holder:

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

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

13. Additional information:

Majedie Asset Management Limited is a discretionary Fund Manager. It invests funds on behalf of its clients on a segregated basis as well as through sub-funds of its pooled vehicles, Majedie Asset Management Investment Fund Company and Majedie Asset Management (International) Investment Fund Company Plc.

It is also the manager of the Majedie Institutional Trust.

14. Contact name:

Kevin MassieCorporate Counsel & Company SecretaryTullow Oil plc

15. Contact telephone number:

020 3249 9000