IMI plc : Holding(s) in Company

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:

         IMI plc

2.      Reason for the notification:(please place an X inside the appropriate bracket/s)

         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                    (X)

         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:

         BlackRock, Inc.

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

         N/A

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

         16th January 2012

6.      Date on which issuer notified:

         17th January 2012

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

         Holding has gone below 10%

8.      Notified details:

A:      Voting rights attached to shares

Class/type of shares (if possible using 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
			Direct	Direct	Indirect	Direct	Indirect
GB0004579636	27,862,949	27,862,949	N/A	N/A	26,923,802	N/A	8.39%

B:      Qualifying Financial Instruments

Resulting situation after the triggering transaction:

Type of financial instrument	Expiration Date	Exercise/ Conversion Period	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

Resulting situation after the triggering transaction

Type of financial instrument	Exercise price	Expiration date	Exercise/ Conversion period	Number of voting rights instrument refers to	% of voting rights
					Nominal	Delta
CFD	N/A	N/A	N/A	5,095,780	1.59%	1.59%

Total (A+B+C)

Number of voting rights	Percentage of voting rights
32,019,582	9.97%

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

         BlackRock Investment Management (UK) Limited - 32,019,582 (9.97%)

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:

         BlackRock International Threshold Reporting Team

14.    Contact name:

         H Afford - Corporate Counsel

15.    Contact telephone number:

         0121 717 3700

END