Tristel PLC (LSE: TSTL) is a constituent of the FTSE AIM 100 Index that specializes in infection prevention solutions. The company focuses on developing and supplying chlorine dioxide-based chemistry for healthcare applications, marketed through two primary brands: Tristel for medical device decontamination and Cache for sporicidal surface disinfection in hospital environments.

Key Investment Rationale – Speculative Buy at GBX 355.00

• Diversification of Geographic Revenue Streams: The company now generates 63% of its revenue overseas, reducing reliance on the UK. Establishing subsidiaries in Spain and India, plus strong Middle East performance, shows methodical global expansion. This diversifies risk against regional downturns and leverages worldwide demand for its products.
• Methodical Expansion in the North American Market: FDA-cleared Tristel OPH's launch and engagement with 200 health systems mark North American progress. The strategy is now shifting from lead generation to deepening adoption to build a recurring revenue base in the region.
• Product Portfolio Development and Innovation: Recent FDA clearances and new product launches like Tristel VISICLEA demonstrate ongoing pipeline investment. This strategy expands the Cache brand's addressable market by targeting specific clinical decontamination needs with sporicidal solutions.
• Operational Efficiency and Cash Flow Management: Insourcing Trio Wipes Manufacturing yielded savings, and a debt-free balance sheet with £12.8 million in cash provides strong capacity for strategic investments, R&D, and shareholder dividends, supported by robust operating cash flow.

TSTL Daily Chart & Valuation

 One Year Technical Price Chart (as of October 17, 2025). Source: REFINITIV, Analysis: Kalkine Group

For conducting the valuation, the following peers have been considered: Niox Group PLC (LSE: NIOX), Spire Healthcare Group PLC (LSE: SPI), etc.

As per the above-mentioned price action and technical indicators analysis, a ‘Speculative Buy’ rating has been given on Tristel PLC (LSE: TSTL) at the Closing Market Price of GBX 355.00, as of October 17, 2025.

Markets are trading in a highly volatile zone currently due to certain Macro & Micro-economic data and prevailing geopolitical tensions. Therefore, it is prudent to follow a cautious approach while investing.

Note 1: Past performance is not a reliable indicator of future performance.

Note 2: The reference date for all price data, currency, technical indicators, support, and resistance levels is 17 October 2025. The reference data in this report has been partly sourced from REFINITIV.

Note 3: Investment decisions should be made depending on an individual's appetite for upside potential, risks, holding duration, and any previous holdings. An 'Exit' from the stock can be considered if the Target Price mentioned as per the Valuation and or the technical levels provided has been achieved and is subject to the factors discussed above.

Note 4: Target Price refers to a price level which the stock is expected to reach as per the relative valuation method and/or technical analysis taking into consideration both short-term and long-term scenario.

Note 5: ‘Kalkine reports are prepared based on the stock prices captured either from the London Stock Exchange (LSE) and or REFINITIV. Typically, both sources (LSE and or REFINITIV) may reflect stock prices with a delay which could be a lag of 15-20 minutes. There can be no assurance that future results or events will be consistent with the information provided in the report. The information is subject to change without any prior notice.’

Note 6: Dividend Yield may vary as per the stock price movement.