Holding(s) in Company

RNS Number : 3887M

Tullow Oil PLC

28 January 2009

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: ( )

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: ( X )

*Change to Share in Issue Figure following Placing of new Ordinary Shares*

Other (please specify): ( )

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

Legal & General Group Plc (L&G)

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

Legal & General Assurance (Pensions Management) Limited (PMC)

5. Date of the transaction (and date on which the threshold is crossed or reached if different) :

26 January 2009

6. Date on which issuer notified:

27 January 2009

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

From 4% - 3% (L&G)

8. Notified details:

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE	Situation previous to the Triggering transaction
Ord 10p GB0001500809	Number of shares 29,642,611	Number of voting Rights 29,642,611

Resulting situation after the triggering transaction
Class/type of shares if possible using the ISIN CODE	Number of shares	Number of voting rights		% of voting rights
	Direct	Direct	Indirect	Direct	Indirect
Ord 10p GB0001500809	31,246,116	31,246,116		3.90%

B: Financial Instruments

Resulting situation after the triggering transaction (xii)

Type of financial instrument	Expiration Date (xiii)	Exercise/Conversion Period/ Date (xiv)	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

Total (A+B)

Number of voting rights	% of voting rights
31,246,116	3.90%

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

Legal & General Group Plc (Direct and Indirect) (Group)

Legal & General Investment Management (Holdings) Limited (LGIMH) (Direct and Indirect)

Legal & General Investment Management Limited (Indirect) (LGIM)

Legal & General Group Plc (Direct) (L&G) (31,246,116 - 3.90% = LGAS, LGPL, & PMC)

Legal & General Investment Management (Holdings) Limited (Direct) (LGIMHD) (28,190,058 - 3.52% = PMC)

Legal & General Insurance Holdings Limited (Direct) (LGIH)

Legal & General Assurance (Pensions Management) Limited (PMC) (28,190,058 - 3.52% = PMC)

Legal & General Assurance Society Limited (LGAS & LGPL)

Legal & General Pensions Limited (Direct) (LGPL)

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:

Notification using the total voting rights figure of 799,840,700

Please note that this notification has been delayed due to a large number of disclosures required following a substantial amount of new business which has come to L&G in the form of an in-specie transfer.

14. Contact name:

Maninder Dhiman, Company Secretarial Assistant

15. Contact telephone number:

0208 996 1000

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 :

Standard Life Investments Ltd

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

Vidacos Nominees

5. Date of the transaction (and date on which the threshold is crossed or reached if different):

26 January 2009

6. Date on which issuer notified:

27 January 2009

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

Direct gone below 3%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE	Situation previous to the Triggering transaction
Ord 10p GB0001500809	Number of shares 37,993,871	Number of voting Rights 37,993,871

Resulting situation after the triggering transaction
Class/type of shares if possible using the ISIN CODE	Number of shares	Number of voting rights		% of voting rights
		Direct	Indirect	Direct	Indirect
Ord 10p GB0001500809	37,993,871	24,591,323	13,402,548	2.837%	1.546%

B: Financial Instruments

Resulting situation after the triggering transaction (xii)

Type of financial instrument	Expiration Date (xiii)	Exercise/Conversion Period/ Date (xiv)	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

Total (A+B)

Number of voting rights	% of voting rights
37,993,871	4.383%

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

Standard Life Investments Ltd

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:

Richard Taylor, Deputy Company Secretary

15. Contact telephone number:

0208 996 1000

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 :

Prudential plc group of companies

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):

26 January 2009

6. Date on which issuer notified:

27 January 2009

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

Non-exempt holdings for Prudential plc have crossed 3%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE	Situation previous to the Triggering transaction
Ord 10p GB0001500809	Number of shares 72,143,865	Number of voting Rights 72,143,865

Resulting situation after the triggering transaction
Class/type of shares if possible using the ISIN CODE	Number of shares	Number of voting rights		% of voting rights
		Direct	Indirect	Direct	Indirect
Ord 10p GB0001500809	72,123,865	72,123,865		9.01%

B: Financial Instruments

Resulting situation after the triggering transaction (xii)

Type of financial instrument	Expiration Date (xiii)	Exercise/Conversion Period/ Date (xiv)	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

Total (A+B)

Number of voting rights	% of voting rights
72,123,865	9.01%

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

Prudential plc (parent Company)

M&G Group Limited (wholly owned subsidiary of Prudential plc)

M&G Limited (wholly owned subsidiary of M&G Group Limited)

M&G Investment Management Limited (wholly owned subsidiary of M&G Limited)

M&G Securities Limited (wholly owned subsidiary of M&G Limited)

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:

As per 5.1.2, the non-exempt holdings for Prudential plc have crossed 3% triggering this notification.

14. Contact name:

Richard Taylor, Deputy Company Secretary

15. Contact telephone number:

0208 996 1000

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):

26January 2009

6. Date on which issuer notified:

28January 2009

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

Gone below 11%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE

Situation previous to the Triggering transaction

Ord 10p
GB0001500809

Number of shares

85,255,600

Number of Voting Rights

85,255,600

Resulting situation after the triggering transaction
Class/type of shares if possible using the ISIN CODE	Number of shares	Number of voting rights		% of voting rights
	Direct	Direct	Indirect	Direct	Indirect
Ord 10p GB0001500809	N/A	N/A	83,496,643	N/A	10.44%

B: Financial Instruments

Resulting situation after the triggering transaction (xii)

Type of financial instrument	Expiration Date (xiii)	Exercise/Conversion Period/ Date (xiv)	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights