Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES i

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

Ophir Energy 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):

Effective 2 June 2014, the major interest in shares transferred from RS Investment Management Co. LLC ("RS Investments") to SailingStone Capital Partners LLC ("SailingStone"), pursuant to a sub-advisory agreement between RS Investments and SailingStone for the RS Global Natural Resources Fund, dated 23 May 2014, and the formation of SailingStone, an investment advisory firm founded by former members of the RS Global Natural Resources Team. SailingStone assumes discretionary investment and voting authority for the shares previously reported by RS Investments under the TR-1 Notification, which included shares held in the RS Global Natural Resources Fund and former RS Investments' client accounts.

X

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

RS Investment Management Co. LLC

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

Registered Holders:

· Bank of New York, Brussels

· BNY Nominees Limited

· JP Morgan Chase Nominees Limited

· Mellon Nominees Limited

· Northern Trust Nominees Limited

· Pershing Nominees Limited

· State Street Nominees Limited

· The Bank of New York Nominees Limited

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

2 June 2014

6. Date on which issuer notified:

3 June 2014

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

Below 3%

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

Indirect

Direct

Indirect xii

Direct

Indirect

GB00B24CT194

55,531,848

53,946,963

0

0

0

0

0%

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

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

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

0

0%

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

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:

RS Investment Management Co. LLC

One Bush Street, Suite 900

San Francisco, CA 94104 USA

14. Contact name:

Craig Madaleno

15. Contact telephone number:

+1 415 591 2721