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 2018 Long Term Incentive Plan ("LTIP") shares, following 19.3% of the original award meeting the agreed targets.

Sale of shares to cover tax/other liabilities, with balance retained in accordance with policy.

c) Price(s) and volume(s)

Names

Alex Smith

Price(s)

321.48p

Volume(s)

30,408

Alex Smith sold 14,173 and retained 16,235 shares

d) Aggregated information

- Aggregated volume

- Price

N/A

e) Date of the transaction

15/02/2021

f) Place of the transaction

London