<div id="readability-page-1"><div>RNS Number : 2624E Clarkson PLC 21 October 2025 CLARKSON PLC(&#34;the Company&#34; or &#34;Clarksons&#34;)21 October 2025Director/PDMR share purchaseThis notification is made in accordance with the UK Market Abuse Regulation.The Company announces that on 17 October 2025, Constantin Cotzias, Independent Non-Executive Director of the Company, purchased 742 ordinary shares of 25p each in the Company at a price of 3485 pence per share.Full details are set out in the form below.For further details please contact:Company enquiries:Rachel FletcherCompany SecretaryTel: +44(0) 20 7334 3171Camarco:Billy CleggJennifer RenwickTel: +44(0) 20 3757 4980About Clarkson PLCClarkson PLC is the world's leading provider of integrated services and investment banking capabilities to the shipping and offshore markets, facilitating global trade.Founded in 1852, Clarksons offers its diverse and growing client base an unrivalled range of shipbroking services, sector research, on-hand logistical support and full investment banking capabilities in all key shipping and offshore sectors. Clarksons continues to drive innovation across its business, developing digital solutions which underpin the Group's unrivalled expertise and knowledge with leading technology.The Group employs over 2,100 people in over 60 different offices across its four divisions.The Company has delivered 22 years of consecutive dividend growth. The highly cash-generative nature of the business, supported by a strong balance sheet, has enabled Clarksons to continue to invest to position the business to capitalise on opportunities in its markets.Clarksons is listed on the main market of the London Stock Exchange under the ticker CKN and is a member of the FTSE 250 Index.For more information, visit <div><table><tbody><tr><td colspan="4">PDMR DEALING NOTIFICATION TEMPLATE</td></tr><tr><td colspan="4">Notification and public disclosure of transactions by persons discharging managerial responsibilities and persons closely associated with them</td></tr><tr><td>1</td><td colspan="3">Details of the person discharging managerial responsibilities/person closely associated</td></tr><tr><td>a)</td><td>Name</td><td colspan="2">Constantin Cotzias</td></tr><tr><td>2</td><td colspan="3">Reason for the notification</td></tr><tr><td>a)</td><td>Position/status</td><td colspan="2">Independent Non-Executive Director</td></tr><tr><td>b)</td><td>Initial notification /Amendment</td><td colspan="2">Initial notification</td></tr><tr><td>3</td><td colspan="3">Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor</td></tr><tr><td>a)</td><td>Name</td><td colspan="2">Clarkson PLC</td></tr><tr><td>b)</td><td>Legal Entity Identifier</td><td colspan="2">2138007G6BGTEHI3OT22</td></tr><tr><td>4</td><td colspan="3">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 rowspan="2">a)</td><td>Description of the financial instrument, type of instrument</td><td colspan="2">Ordinary shares of 25p each in Clarkson PLC</td></tr><tr><td>Identification code</td><td colspan="2">GB0002018363</td></tr><tr><td>b)</td><td>Nature of the transaction</td><td colspan="2">Purchase of ordinary shares</td></tr><tr><td rowspan="2">c)</td><td rowspan="2">Price(s) and volume(s)</td><td>Price(s)</td><td>Volume(s)</td></tr><tr><td>3485 pence per share</td><td>742</td></tr><tr><td rowspan="3">d)</td><td>Aggregated information</td><td colspan="2" rowspan="3">Not applicable - single transaction</td></tr><tr><td>- Aggregated volume</td></tr><tr><td>- Price</td></tr><tr><td>e)</td><td>Date of the transaction</td><td colspan="2">17 October 2025</td></tr><tr><td>f)</td><td>Place of the transaction</td><td colspan="2">London Stock Exchange</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 DSHPPGAUUUPAGCG</div></div>

Clarkson PLC announced that Independent Non-Executive Director Constantin Cotzias purchased 742 ordinary shares at 3485 pence each on 17 October 2025. This transaction is in compliance with the UK Market Abuse Regulation. Clarkson PLC, a leading provider of integrated services to the shipping and offshore markets, has a strong financial position with 22 years of consecutive dividend growth and is listed on the London Stock Exchange under the ticker CKN.

REG - Clarkson PLC - Director/PDMR Shareholding