RNSArticle


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		Invensys 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):
3. Full name of person(s) subject to the notification obligation: ⁱⁱⁱ	Prudential plc group of companies
4. Full name of shareholder(s) (if different from 3.):^iv	See attached schedule
5. Date of the transaction and date on which the threshold is crossed or reached: ^v	07 September 2011
6. Date on which issuer notified:	08 September 2011
7. Threshold(s) that is/are crossed or reached: ^{vi, vii}	See item 13

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

GB00B19DVX61

81,627,276

81,502,276

81,166,742

335,534

9.99%

0.04%

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

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}

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

81,502,276

10.03%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: ^xxi
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) The Prudential Assurance Company Limited (wholly owned subsidiary of Prudential Plc)

Proxy Voting:
10. Name of the proxy holder:		N/A
11. Number of voting rights proxy holder will cease to hold:		N/A
12. Date on which proxy holder will cease to hold voting rights:		N/A

13. Additional information:	M&G Investment Management Limited (wholly owned subsidiary of M&G Limited) has moved below a 10% notifiable interest triggering this notification. The Prudential Assurance Company Limited (wholly owned subsidiary of Prudential Plc) for the non-exempt holdings has moved from 4% to 3%.
14. Contact name:	Steve Devany
15. Contact telephone number:	020 3155 1301

	HOLDING			% Total Notification of Interests
PRUDENTIAL PLC	81,502,276			10.03

REGISTERED HOLDER
Direct NORTRUST NOMINEE LTD A/C MHF01	181,944
NORTRUST NOMINEE LTD A/C MHJ01	774,991
NORTRUST NOMINEE LTD A/C MKB01	263,842
NORTRUST NOMINEE LTD A/C MKK01	40,400,994
NORTRUST NOMS LTD	92,583
NORTRUST NOMS LTD A/C PUF01	1,000,000
NORTRUST NOMS LTD A/C PUI01	48,061
NORTRUST NOMS LTD A/C PUR01	202,743
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	726,071
PUT UK GROWTH QIS	5,743,355
Indirect JP MORGAN NOMINEES	241,334
STATE STREET NOMS	94,200

		HOLDING	% Total Notification of Interests
M&G GROUP LIMITED		81,260,942	10.00

REGISTERED HOLDER Direct
NORTRUST NOMINEE LTD A/C MHF01		181,944
NORTRUST NOMINEE LTD A/C MHJ01		774,991
NORTRUST NOMINEE LTD A/C MKB01		263,842
NORTRUST NOMINEE LTD A/C MKK01		40,400,994
NORTRUST NOMS LTD		92,583
NORTRUST NOMS LTD A/C PUF01		1,000,000
NORTRUST NOMS LTD A/C PUI01		48,061
NORTRUST NOMS LTD A/C PUR01		202,743
PRUCLT HSBC GIS NOM(UK) PAC AC		31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC		726,071
PUT UK GROWTH QIS		5,743,355
STATE STREET NOMS		94,200

M&G INVESTMENT MANAGEMENT LIMITED	HOLDING	% Total Notification of Interests
	81,078,998	9.98

REGISTERED HOLDER Direct
NORTRUST NOMINEE LTD A/C MHJ01	774,991
NORTRUST NOMINEE LTD A/C MKB01	263,842
NORTRUST NOMINEE LTD A/C MKK01	40,400,994
NORTRUST NOMS LTD	92,583
NORTRUST NOMS LTD A/C PUF01	1,000,000
NORTRUST NOMS LTD A/C PUI01	48,061
NORTRUST NOMS LTD A/C PUR01	202,743
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	726,071
PUT UK GROWTH QIS	5,743,355
STATE STREET NOMS	94,200

M&G LIMITED	HOLDING	% Total Notification of Interests
	81,260,942	10.00
REGISTERED HOLDER Direct
NORTRUST NOMINEE LTD A/C MHF01	181,944
NORTRUST NOMINEE LTD A/C MHJ01	774,991
NORTRUST NOMINEE LTD A/C MKB01	263,842
NORTRUST NOMINEE LTD A/C MKK01	40,400,994
NORTRUST NOMS LTD	92,583
NORTRUST NOMS LTD A/C PUF01	1,000,000
NORTRUST NOMS LTD A/C PUI01	48,061
NORTRUST NOMS LTD A/C PUR01	202,743
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	726,071
PUT UK GROWTH QIS	5,743,355
STATE STREET NOMS	94,200

-------	HOLDING	% Total Notification of Interests
The Prudential Assurance Company Limited	32,458,229	3.99

REGISTERED HOLDER Direct
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	726,071

% Total Notification of

Interests

HOLDING

M&G Securities Limited 41,715,971 5.13

REGISTERED HOLDER

Direct

NORTRUST NOMINEE LTD A/C MHF01 181,944

NORTRUST NOMINEE LTD A/C MHJ01 774,991

NORTRUST NOMINEE LTD A/C MKB01 263,842

NORTRUST NOMINEE LTD A/C MKK01 40,400,994

STATE STREET NOMS 94,200

Holding(s) in Company