Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

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

CAMCO INTERNATIONAL LTD

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

Tudor Group Holdings LLC

High Tower Trading LLC

Tudor Global Trading LLC

Tudor International LLC

Tudor Capital (UK) Ltd

Tudor Capital Europe LLP

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

Vidacos Nominees Limited

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

23 October 2012

6. Date on which issuer notified:

25 October 2012

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

9%

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

GB00B11FB960

18,899,999

18,899,999

16,999,999

8.96%

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

16,999,999

8.96%

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

Tudor Group Holdings LLC is the parent undertaking of High Tower Trading LLC and Tudor Global Trading LLC.

High Tower Trading LLC and Tudor Global Trading LLC are the parent undertakings of Tudor International LLC and Tudor Capital (UK) Ltd.

Tudor International LLC and Tudor Capital (UK) Ltd are the parent undertakings of Tudor Capital Europe LLP.

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:

14. Contact name:

Ben Kitchener

Tudor Capital Europe LLP

Great Burgh

Epsom

Surrey KT18 5XT

15. Contact telephone number:

+44 (208 786-3935)