1. Details of the person discharging managerial responsibilities / person closely associated

a) Names

Alex Smith

2. Reason for the notification

a) Position/status

CFO

b) Initial notification /Amendment

Initial notification

3. Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a) Name

SThree plc

b) LEI

2138003NEBX5VRP3EX50

4. Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a) Description of the financial instrument, type of instrument

Identification code

Ordinary shares of 1p

GB00B0KM9T71

b) Nature of the transaction

Vesting of  2017 Long Term Incentive Plan ("LTIP") in relation to the Relative gross profit performance condition. Alex Smith sold all shares. LTIP performance shares were sold as part of a bulk exercise/sale instruction for all participants lodged between 21-28 May.

c) Price(s) and volume(s)

Names

Alex Smith

Price(s)

260.00p

Volume(s)

15,248

d) Aggregated information

- Aggregated volume

- Price

N/A

e) Date of the transaction

08/06/2020

f) Place of the transaction

London Stock Exchange