TRISTEL plc

("Tristel" or the "Company")

Investor Presentations and Notice of Trading Update

Capital Markets Day & Shareholder Open Day

Tristel plc (AIM: TSTL), the manufacturer of infection prevention products, announces it will host two investor presentations on consecutive days, Tuesday 29 July 2025 and Wednesday 30 of July 2025. Both sessions will feature the same presentations, offer a chance to meet the Senior Leadership Team, include insights from a US customer using Tristel ULT, familiarise themselves with the Company's products and provide an open forum for questions. Details of the two events are below.

Capital Markets Day

The Capital Markets Day will be hosted in the City of London on Tuesday 29 July 2025. The event will commence at 14:30pm BST and welcomes Institutional Investors and Analysts. For more information and to register please contact Walbrook PR via  tristel@walbrookpr.com.

Shareholder Open Day

The Shareholder Open Day will be hosted at the Company's headquarters in Snailwell, Cambridgeshire on Wednesday 30 July 2025. Shareholders are welcome from 12:00pm BST. Along with the presentations detailed above, it will also provide an opportunity for shareholders take a tour of the facility. Availability is limited so please contact Walbrook PR via tristel@walbrookpr.com or call 020 7933 8780 to reserve an entry ticket.

For those that are unable to make the above presentations in person, a recording will be made available on the Company's website, shortly after the event, here: https://tristelgroup.com/invest/webinars-presentations/.

No new material information regarding current trading will be disclosed during the day.

Notice of Trading Update

The Company will also provide an update on trading for the year ended 30 June 2025 on Tuesday 29 July 2025.

For further information please contact:

About Tristel plc

Tristel plc is a global infection prevention company focussed on the manufacture and supply of products using its unique proprietary chlorine dioxide (ClO₂) chemistry. The Company is a market leader in manual decontamination of medical devices, supplying hospitals under the Tristel brand, and under the Cache brand provides products for sporicidal surface disinfection, a more sustainable alternative to commonly used pre-wetted plastic wipes.

Tristel's head office and manufacturing facility is located in Snailwell, near Cambridge, and operates globally employing approximately 270 people across 16 subsidiaries selling into 40+ countries. The Company targets annual revenue growth of between 10% and 15% and an EBITDA margin of at least 25% and the business is profitable, with no debt and has a progressive dividend policy.

The Company has been listed on the London Stock Exchange's AIM market since 2005 (AIM: TSTL).

For more information about Tristel's product range please visit: https://tristel.com