Tristel Regulatory News (TSTL)

1.

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

David Orr

2.

Reason for the Notification

a)

Position/status

Non-Executive Director

b)

Initial notification/Amendment

Initial notification

3.

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

a)

Name

Tristel PLC

b)

LEI

n/a

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

Ordinary shares of 1p

Identification code

GB00B07RVT99

b)

Nature of the transaction

Transfer via sale and purchase

c)

Price(s) and volume(s)

d)

Aggregated information:

· Aggregated volume

· Price

Purchase of 12,511 ordinary shares of 1 pence at 121.7 pence per ordinary share

e)

Date of the transaction

21 July 2016

f)

Place of the transaction

London Stock Exchange, AIM Market (XLON)