Press release

For filings with the FCA include the annex

For filings with issuer exclude the annex

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

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

Riverstone Energy Limited

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

Other (please specify):

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

Casita L.P. (acting through its general partner, Pennsylvania Star, LLC)

4. Full name of shareholder(s)

(if different from 3.):iv

5. Date of the transaction and date on which the threshold is crossed or reached: v

19 December 2016

6. Date on which issuer notified:

19 December 2016

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

Below 5%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of  voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GG00BBHXCL35

5,000,000

5,000,000

3,880,032

3,880,032

Nil

4.6%

Nil

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date xiii

Exercise/ Conversion Period xiv

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

None

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

xv, xvi

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date xvii

Exercise/ Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

None

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

3,880,032

4.6%

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

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:

14. Contact name:

Matthew Bishop

15. Contact telephone number:

USA 212.373.5178

A: Identity of the persons or legal entity subject to the notification obligation

Full name

(including legal form of legal entities)

Casita, L.P. (acting through its general partner, Pennsylvania Star, LLC)

Contact address

(registered office for legal entities)

100 N. Addison, Suite 220, Elmhurst, IL  60126 USA

Phone number & email

[email protected]/212.373.5178

Other useful information

(at least legal representative for legal persons)

B: Identity of the notifier, if applicable

Full name

Matthew Bishop

Contact address

Same as above

Phone number & email

Same as above

Other useful information

(e.g. functional relationship with the person or legal entity subject to the notification obligation)

C: Additional information