As per Attachment

September 28, 2026 To, To, National Stock Exchange of India Limited, BSE Limited, Exchange Plaza, Plot No. C/1, G Block, Bandra- Phiroze Jeejeebhoy Towers, Kurla Complex, Bandra (East), Mumbai – 21st Floor, Dalal Street, 400051 Mumbai – 400001 NSE Symbol: RISHABH BSE Scrip Code: 543977 Dear Sir/Madam, Sub: Closure of Trading Window Please be informed that in terms of the SEBI (Prohibition of Insider Trading) Regulations, 2015 and Code of Conduct to Regulate, Monitor and Report Trading by Designated Persons and their Immediate Relatives, the ‘Trading Window' for dealing in securities of the Company shall remain closed on and from October 1, 2026 till the end of 48 hours after the declaration of the Unaudited (Standalone & Consolidated) Financial Results for the quarter ended September 30, 2026. The date of the meeting of Board of Directors for consideration and approval of Unaudited (Standalone & Consolidated) Financial Results for the quarter ended September 30, 2026 shall be intimated in due course. The aforesaid information will also be hosted on the website of the Company at https://rishabh.co.in/. Kindly take the same on your records. For Rishabh Instruments Limited Ajinkya Joglekar Company Secretary and Compliance Officer ICSI Membership No.: A57272