Tullow Oil PLC
12 July 2007
TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES
1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached :
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 financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached: ( )
An event changing the breakdown of voting rights:
( )
Other (please specify):
( )
3. Full name of person(s) subject to the notification obligation :
BLACKROCK, INC
4. Full name of shareholder(s) (if different from 3.):
5. Date of the transaction (and date on which the threshold is crossed or
reached if different) :
11 JULY 2007
6. Date on which issuer notified:
12 JULY 2007
7. Threshold(s) that is/are crossed or reached:
GONE ABOVE 16%
8. Notified details:
A: Voting rights attached to shares
Class/type of shares if possible Situation previous to the Triggering transaction
using the ISIN CODE
Number of shares Number of voting Rights
Ord 10p
GB0001500809 114,526,568 114,526,568
Resulting situation after the triggering transaction
Class/type of shares if Number of shares Number of voting rights % of voting rights
possible using the ISIN
CODE
Direct Direct Indirect Direct Indirect
Ord 10p N/A N/A 115,747,392 N/A 16.10%
GB0001500809
B: Financial Instruments
Resulting situation after the triggering transaction (xii)
Type of Expiration Date Exercise/Conversion Number of voting rights % of voting rights
financial (xiii) Period/ Date (xiv) that may be acquired if the
instrument instrument is exercised/
converted.
Total (A+B)
Number of voting rights % of voting rights
115,747,392 16.10%
9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable (xv):
BLACKROCK INVESTMENT MANAGEMENT (UK) LIMITED - 115,747,392 (16.10%)
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:
TOM HICKEY, COMPANY SECRETARY
15. Contact telephone number:
0208 996 1000
This announcement has been issued through the Companies Announcement Service of
The Irish Stock Exchange
This information is provided by RNS
The company news service from the London Stock Exchange
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