Diploma PLC — Director's Dealing 2026

May 21, 2026

National Storage Mechanism | Additional information

RNS Number : 3452F

Diploma PLC

21 May 2026

                                           10-11 CHARTERHOUSE SQUARE,

LONDON EC1M 6EE

TELEPHONE: +44 (0)20 7549 5700

21 May 2026

Notification of transactions by persons discharging managerial responsibilities (PDMRs)

Diploma PLC (the "Company") has been notified that on 20 May 2026, Katie Bickerstaffe, Senior Independent Director of the Company, purchased 177 Ordinary Shares in the Company. Following this transaction, Katie Bickerstaffe's total shareholding is 2,297 Ordinary Shares.

The Notification of Dealing Form can be found below. This announcement is made in accordance with the UK Market Abuse Regulation (Regulation (EU) 596/2014, as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018).

1

Details of the Director/PDMR/PCA

a)

Name

Katie Bickerstaffe

2

Reason for the notification

a)

Position/Status

Senior Independent Director

b)

Initial notification/

Amendment

Initial notification

3

Details of the issuer

a)

Name

Diploma PLC

b)

LEI

2138008OGI7VYG8FGR19

4

Details of the transactions:

a)

Description of the financial instrument, type of instrument

Identification code

Ordinary shares of 5p each in the Company

GB0001826634

b)

Nature of the transaction

Purchase of Shares

c)

Price(s) and volume(s)

Price                          Volume

£67.30                      177

d)

Aggregated information

177                           

£11,912.10

-   Aggregated volume

-   Price

e)

Date of the transaction

20 May 2026

f)

Place of the transaction

London Stock Exchange

For further information please contact:

Diploma PLC	Tel: +44 (0)20 7549 5700
Anna Lawrence, Group Company Secretary

LEI: 2138008OGI7VYG8FGR19

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