NOTIFICATION OF MAJOR INTERESTS IN SHARES

1  Identity of the issuer or the underlying issuer of existing shares
   to which voting rights are attached:

   Johnson Matthey Plc

2  Reason for the notification:

   An acquisition or disposal of voting rights

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

   Ameriprise Financial, Inc. and its group

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

   (1) Threadneedle Asset Management Limited

   (2) Columbia Management Investment Advisers, LLC

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

   27 August 2015

6  Date on which issuer notified:

   1 September 2015

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

   Above the threshold of 5%

8  Notified details:

   VOTING RIGHTS ATTACHED TO SHARES:

   Class/type of shares (if possible using the ISIN CODE):

   GB00B70FPS60

   US4791424082

   Situation previous to the triggering transaction:

   Number of shares: N/A

   Number of voting rights: N/A

   Resulting situation after the triggering transaction:

   Number of shares (direct): 128,750 (GB00B70FPS60)

   Number of voting rights (direct): 128,750 (GB00B70FPS60)

   Number of voting rights (indirect): 10,122,503 (GB00B70FPS60)
                                                    216 (US4791424082)

   % of voting rights (direct): 0.063% (GB00B70FPS60)

   % of voting rights (indirect): 4.940% (GB00B70FPS60)

   Total voting rights: 10,251,469 (5.003%)

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

   Columbia Management Investment Advisers, LLC (0.119%)

   Threadneedle Asset Management Limited (4.884%)

   Columbia Management Investment Advisers, LLC is wholly owned by
   Ameriprise Financial, Inc.Threadneedle Asset Management Limited is wholly owned by TC
   Financing Limited, which is itself wholly owned by Threadneedle
   Asset Management Holdings Limited, which is itself wholly owned by
   TAM UK Holdings Limited, which is itself wholly owned by
   Threadneedle Holdings Limited, which is itself wholly owned by
   Threadneedle Asset Management Holdings SARL, which is itself wholly
   owned by Ameriprise International Holdings GmbH, which is itself
   wholly owned by Ameriprise Financial, Inc.

   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

   The Shares referred to in section 9 of this form are held in
   portfolios and funds managed on a discretionary basis by the
   entities set out in section 4.

   Please note that the Shares are held through certain nominee
   companies.

14 Contact Name:

   Angela Purtill, Deputy Company Secretary, Johnson Matthey plc

15 Contact Telephone Number:

   020 7269 8461

   2 September 2015