Proposed Secondary Placing

Tristel plc

("Tristel" or "the Company")

Proposed Secondary Placing

Tristel plc (AIM: TSTL), the manufacturer of infection prevention, contamination control and hygiene products, announces that certain directors intend to sell up to 3,329,371 ordinary shares of 1 penny each in the capital of the Company (the "Placing Shares" and the "Placing"), representing approximately 7.84% of the issued share capital of the Company at a price of 175 pence per Placing Share in order to satisfy market demand and broaden the institutional shareholder base of the Company. The Board also confirms that its expectations for the Company's full year performance remain consistent with its statement dated 23 February 2017.

The completion of the Placing and the resulting directors' shareholdings will be announced as soon as practicable.

The information communicated in this announcement is inside information for the purposes of Article 7 of Regulation 596/2014.

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