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	15 November 2011
6. Date on which issuer notified:	17 November 2011
7. Threshold(s) that is/are crossed or reached: ^{vi, vii}	10% - 9%

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

81,292,368

81,191,230

80,855,696

335,534

9.95%

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

81,191,230

9.99%

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:
14. Contact name:	Steve Devany
15. Contact telephone number:	020 3155 1301

---------	HOLDING			% Total Notification of Interests
PRUDENTIAL PLC	81,191,230			9.99

REGISTERED HOLDER
Direct PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	686,052
STATE STREET NOMS LTD A/C GMB7	23,351
STATE STREET NOMS LTD A/C GMH8	69,232
STATE STREET NOMS LTD A/C GMIB	916,887
STATE STREET NOMS LTD A/C GMIF	181,944
STATE STREET NOMS LTD A/C GMIM	101,723
STATE STREET NOMS LTD A/C GMIQ	40,400,994
STATE STREET NOMS LTD A/C GMIV	1,000,000
STATE STREET NOMS LTD A/C GMXG	5,743,355
Indirect JP MORGAN NOMINEES	241,334
STATE STREET NOMS	94,200


		HOLDING	% Total Notification of Interests
M&G GROUP LIMITED		80,949,896	9.96

REGISTERED HOLDER
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	686,052
STATE STREET NOMS LTD A/C GMB7	23,351
STATE STREET NOMS LTD A/C GMH8	69,232
STATE STREET NOMS LTD A/C GMIB	916,887
STATE STREET NOMS LTD A/C GMIF	181,944
STATE STREET NOMS LTD A/C GMIM	101,723
STATE STREET NOMS LTD A/C GMIQ	40,400,994
STATE STREET NOMS LTD A/C GMIV	1,000,000
STATE STREET NOMS LTD A/C GMXG	5,743,355
STATE STREET NOMS		94,200

	HOLDING	% Total Notification of Interests
M&G INVESTMENT MANAGEMENT LIMITED	80,767,952	9.94


REGISTERED HOLDER
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	686,052
STATE STREET NOMS LTD A/C GMB7	23,351
STATE STREET NOMS LTD A/C GMH8	69,232
STATE STREET NOMS LTD A/C GMIB	916,887
STATE STREET NOMS LTD A/C GMIM	101,723
STATE STREET NOMS LTD A/C GMIQ	40,400,994
STATE STREET NOMS LTD A/C GMIV	1,000,000
STATE STREET NOMS LTD A/C GMXG	5,743,355
STATE STREET NOMS	94,200

M&G LIMITED	HOLDING	% Total Notification of Interests
	80,949,896	9.96
REGISTERED HOLDER
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	686,052
STATE STREET NOMS LTD A/C GMB7	23,351
STATE STREET NOMS LTD A/C GMH8	69,232
STATE STREET NOMS LTD A/C GMIB	916,887
STATE STREET NOMS LTD A/C GMIF	181,944
STATE STREET NOMS LTD A/C GMIM	101,723
STATE STREET NOMS LTD A/C GMIQ	40,400,994
STATE STREET NOMS LTD A/C GMIV	1,000,000
STATE STREET NOMS LTD A/C GMXG	5,743,355
STATE STREET NOMS	94,200

	HOLDING	% Total Notification of Interests
The Prudential Assurance Company Limited	32,418,210	3.99

REGISTERED HOLDER Direct
PRUCLT HSBC GIS NOM(UK) PAC AC	31,732,158
PRUCLT HSBC GIS NOM(UK) PPL AC	686,052

% Total Notification of

Interests

HOLDING

M&G Securities Limited 41,695,748 5.13

REGISTERED HOLDER

Direct

STATE STREET NOMS LTD A/C GMIB	916,887
STATE STREET NOMS LTD A/C GMIF	181,944
STATE STREET NOMS LTD A/C GMIM	101,723
STATE STREET NOMS LTD A/C GMIQ	40,400,994
STATE STREET NOMS	94,200

Holding(s) in Company