Sanderson Design Group: Director/PDMR Shareholding

For immediate release 12 October 2026 SANDERSON DESIGN GROUP PLC ("Sanderson Design Group", the "Company" or the "Group") Notification of transactions by Director/Person Discharging Managerial Responsibility (together "PDMR") Sanderson Design Group PLC (AIM: SDG), the luxury interior design and furnishings group, announces that Juliette Stacey, Non-executive Director, has purchased 13,089 ordinary shares of 1p each in the Company ("Ordinary Shares"). Following this transaction, her holding of Ordinary Shares is set out in the table below: Director Resultant Interest in Ordinary Shares % of Total Voting Rights Juliette Stacey 30,564 0.042% The notification below is made in fulfilment of the obligation under Article 19 of the Market Abuse Regulation: 1. Details of the person discharging managerial responsibilities/person closely associated a) Name Juliette Stacey 2. Reason for the notification a) Position/status Non-executive Director b) Initial notification/Amendment Initial notification 3. Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor a) Name Sanderson Design Group PLC b) LEI 213800A8K2WOUZJIQL93 4. 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 a) Description of the financial instrument, type of instrument Identification code Ordinary Shares of 1 pence each GB0003061511 b) Nature of the transaction Purchase of Ordinary Shares c) Price(s) and volume(s) Price(s) Volume(s) £0.764 13,089 d) Aggregated information N/A e) Date of the transaction 12 October 2026 f) Place of the transaction London Stock Exchange - AIM For further information: Sanderson Design Group PLC c/o Vigo Consulting Lisa Montague, Chief Executive Officer Mike Woodcock, Chief Financial Officer David Gracie, Company Secretary Singer Capital Markets (Nominated Adviser and Broker) +44 (0) 20 7496 3000 Jen Boorer / Sara Hale / James Todd Vigo Consulting +44 (0) 20 7390 0230 Fiona Hetherington / Guy Scarborough / Joe Quinlan / Safia Colebrook sdg@vigoconsulting.com Notes for editors: About Sanderson Design Group Sanderson Design Group PLC is a global design house specialising in luxury interior furnishings. The Company designs, manufactures, and markets wallpapers, fabrics, and paints through trade suppliers and direct-to-consumer. In addition, the Company derives licensing income from the use of its designs on a wide range of products such as bed and bath collections, rugs, blinds, and tableware. Sanderson Design Group's brands include Zoffany, Sanderson, Morris & Co., Harlequin, Clarke & Clarke, Scion and Designers Guild, spanning luxury, heritage and contemporary names. The Company has a vertically integrated model with a strong UK manufacturing base comprising Anstey wallpaper factory in Loughborough and Standfast & Barracks, a fabric printing factory, in Lancaster. Both sites manufacture for the Company and for other wallpaper and fabric brands. Sanderson Design Group employs approximately 500 people, and its products are sold worldwide. It has showrooms in London, New York and Chicago. Sanderson Design Group trades on the AIM market of the London Stock Exchange under the ticker symbol SDG. For further information please visit: www.sandersondesign.group

Sanderson Design Group: Director/PDMR Shareholding

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