Holding(s) in Company

For filings with the FCA include the annex

For filings with issuer exclude the annex

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

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

x

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

x

An event changing the breakdown of voting rights

Other (please specify):

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

Deutsche Bank AG

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

Deutsche Bank AG, London Branch

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

03/10/2016

6. Date on which issuer notified:

05/10/2016

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

Below 8%

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

Direct

Direct

Indirect

Direct

Indirect

GB0001500809

42,670,049

42,670,049

35,209,713

35,209,713

0

3.86%

0

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

Right To Recall

7,291,800

0.8%

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

Swaps

31-Aug-17

21,922,959

Nominal

Delta

2.40%

2.40%

Total (A+B+C)

Number of voting rights

Percentage of voting rights

64,424,472

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

Deutsche Bank AG, London Branch - 7.06%

Proxy Voting:

10. Name of the proxy holder:

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

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

13. Additional information:

14. Contact name:

Kevin Massie

Corporate Counsel & Company Secretary

Tullow Oil plc

15. Contact telephone number:

020 3249 9000