Holding(s) in Company

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.):

BNP Paribas Nominees Pty Limited

BNY (OCS) Nominees Ltd

Chase Nominees Ltd

HSBC Global Custody Nominee (UK) Limited

Nortrust Nominees Ltd

Roy Nominees

Royal Trust Corp of Canada

State Street Nominees Limited

The Bank of New York (Nominees) Limited

Vidacos Nominees Ltd

5

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

25 April 2017

6

Date on which issuer notified:

27 April 2017

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):

GB00BZ4BQC70

US4791425071

Situation previous to the triggering transaction:

Number of shares:

N/A (GB00BZ4BQC70)

N/A (US4791425071)

Number of voting rights:

N/A (GB00BZ4BQC70)

N/A (US4791425071)

Resulting situation after the triggering transaction:

Number of shares (direct):

84,408

0

(GB00BZ4BQC70)

(US4791425071)

Number of voting rights (direct):

84,408

0

(GB00BZ4BQC70)

(US4791425071)

Number of voting rights (indirect):

9,727,235

174

(GB00BZ4BQC70)

(US4791425071)

% of voting rights (direct):

0.044%

(GB00BZ4BQC70)

0.000%

(US4791425071)

% of voting rights (indirect):

5.026 %

(GB00BZ4BQC70)

0.000%

(US4791425071)

Total voting rights: 9,811,817 (5.070%)

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 (0.061%)

Threadneedle Asset Management Limited (5.009%)

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 9.

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

14

Contact Name:

Victoria Barlow, Assistant Company Secretary, Johnson Matthey Plc

15

Contact Telephone Number:

020 7269 8431

27 April 2017