Holding(s) in Company

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

JKX Oil & Gas 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: iii

Burak Ozdogan

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

Neptune Invest & Finance Corp.

Dumarchal Nominee Limited

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

19 June 2015

6. Date on which issuer notified:

23 June 2015

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

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

Ordinary Shares

0

8,584,445

0

0

8,804,445

0

5.12

GB0004697420

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

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

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

8,804,445

5.12

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

Mr Ozdogan is the beneficial owner (through Dumarchal Nominee Limited, as trustee) of 100% of the share capital of Neptune Invest & Finance Corp.

Neptune Invest & Finance Corp. holds 8,804,445 ordinary shares, representing 5.12% of the voting rights, in JKX Oil & Gas Plc.

Proxy Voting:

10. Name of the proxy holder:

N/A

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:

Tom MatthewsDebevoise & Plimpton LLP

15. Contact telephone number:

020 7786 9000