<div id="readability-page-1"><div>RNS Number : 2200U Synthomer PLC 06 August 2025 LEI: 213800EHT3TI1KPQQJ56<div><table><tbody><tr><td>1</td><td colspan="2">Details of the person discharging managerial responsibilities / person closely associated</td></tr><tr><td>a)</td><td>Name</td><td>Jonathan Silver</td></tr><tr><td>2</td><td colspan="2">Reason for the notification</td></tr><tr><td>a)</td><td>Position/status</td><td>Non-Executive Director</td></tr><tr><td>b)</td><td>Initial notification /Amendment</td><td>Initial notification</td></tr><tr><td>3</td><td colspan="2">Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor</td></tr><tr><td>a)</td><td>Name</td><td>Synthomer plc</td></tr><tr><td>b)</td><td>LEI</td><td>213800EHT3TI1KPQQJ56</td></tr><tr><td>4</td><td colspan="2">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</td></tr><tr><td>a)</td><td>Description of the financial instrument, type of instrumentIdentification code</td><td>Ordinary shares of 1 pence each in Synthomer plcGB00BNTVWJ75</td></tr><tr><td>b)</td><td>Nature of the transaction</td><td>Purchase of ordinary shares of 1 pence each in Synthomer plc</td></tr><tr><td>c)</td><td>Price(s) and volume(s)</td><td><div><table><tbody><tr><td>Price(s)</td><td>Volume(s)</td></tr><tr><td>£0.655</td><td>59,229</td></tr></tbody></table></div></td></tr><tr><td>d)</td><td>Aggregated information- Aggregated volume- Price</td><td>59,229£38,795 (excluding transaction fees)</td></tr><tr><td>e)</td><td>Date of the transaction</td><td>6 August 2025</td></tr><tr><td>f)</td><td>Place of the transaction</td><td>London Stock Exchange (LON)</td></tr></tbody></table></div>This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy. END DSHEAPPKELLSEEA</div></div>

SYNT

Synthomer PLC announced that Non-Executive Director Jonathan Silver purchased 59,229 ordinary shares at a price of £0.655 each on August 6, 2025, totaling £38,795 (excluding transaction fees). The transaction took place on the London Stock Exchange. This is the initial notification regarding the shareholding.

REG - Synthomer PLC - Director/PDMR Shareholding