Tullow Oil Regulatory News (TLW)

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

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

X

An event changing the breakdown of voting rights

Other (please specify):

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

JPMorgan Chase & Co.

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

J.P. Morgan Securities Plc

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

18 November 2016

6. Date on which issuer notified:

22 November 2016

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

3%, 4%, 5% Upwards

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

GB0001500809

Below minimum threshold

Below minimum threshold

6,510,764

0.71%

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

Right to Recall

67,200

0.01%

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

Cash-settled equity swap

Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap Cash-settled equity swap

30/11/2016

13/12/2016

20/01/2017

31/03/2017

13/04/2017

10/05/2017

13/06/2017

30/06/2017

24/07/2017

26/07/2017

07/08/2017

16/08/2017

03/10/2017

16/10/2017

17/10/2017

01/11/2017

13/11/2017

06/12/2017

13/12/2017

20/04/2018

03/08/2018

30/11/2016

13/12/2016

20/01/2017

31/03/2017

13/04/2017

10/05/2017

13/06/2017

30/06/2017

24/07/2017

26/07/2017

07/08/2017

16/08/2017

03/10/2017

16/10/2017

17/10/2017

01/11/2017

13/11/2017

06/12/2017

13/12/2017

20/04/2018

03/08/2018

101,351

8,025,800

13,340,000

3,660,278

187,378

110,242

27,726

2,115,447

37,543

154,893

1,038,000

929,933

515

283

1,726

4,215,074

48,685

200,000

500,000

991,172

3,574,493

0.01%

 0.88%

 1.46%

 0.40%

 0.02%

 0.01%

 0.00%

 0.23%

 0.00%

 0.02%

 0.11%

 0.10%

 0.00%

 0.00%

 0.00%

 0.46%

 0.01%

 0.02%

 0.05%

 0.11%

 0.39%

Total (A+B+C)

Number of voting rights

Percentage of voting rights

45,838,503

5.02%

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

Total disclosable holding for JPMorgan Chase & Co.: 45,838,503 (5.02%)

Direct: J.P. Morgan Securities Plc: 6,510,764 (0.71%) Shares; 39,260,539 (4.30%) Qualifying Financial Instruments; 67,200 (0.01%) Financial Instruments with similar economic effect to Qualifying Financial Instruments.

Chain of control:

JPMorgan Chase & Co.

JPMorgan Chase Bank, National Association (100%)

J.P. Morgan International Inc. (100%)

Bank One International Holdings Corporation (100%)

J.P. Morgan International Finance Limited (100%)

J.P. Morgan Capital Holdings Limited (100%)

J.P. Morgan Chase (UK) Holdings Limited (99.99%)

J.P. Morgan Chase International Holdings (100%)

J.P. Morgan Securities plc (99.41%)

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:

Table 8A) Includes stock borrows of 41,100,643 (4.50%)

14. Contact name:

Kevin Massie

Corporate Counsel & Company Secretary

Tullow Oil plc

15. Contact telephone number:

020 3249 9000