Analysts/Institutional Investor Meet/Con. Call Updates

August 4, 2026 BSE Limited National Stock Exchange of India Limited Department of Corporate Services Exchange Plaza, Bandra Kurla Complex Phiroze Jeejeebhoy Towers, Mumbai – 400 050 Dalal Street, Mumbai – 400 001 Scrip Symbol - CHEMPLASTS Scrip Code - 543336 Dear Sir/Madam, Subject: Earnings Conference Call Pursuant to the applicable provisions of SEBI (Listing Obligations and Disclosure Requirements) Regulations 2015 (“SEBI Listing Regulations”), please find enclosed details of Earnings Conference Call proposed to be held on Friday, 7th August, 2026. This information is submitted to you pursuant to Regulation 30(6) of SEBI Listing Regulations. Kindly note that changes may happen due to exigencies on the part of Participants/Company. Date & Time of occurrence of this information: August 4, 2026; 12 Noon (IST). This is for your information and records. The above information will also be available on the website of the Company at www.chemplastsanmar.com Thanking You, Yours faithfully, For CHEMPLAST SANMAR LIMITED P SRINIVASAN Company Secretary and Compliance Officer Memb No. ACS 10129 Chemplast Sanmar Ltd Cordially invites you to its Earnings Call To discuss operational and financial performance of Q1 FY27 Day/Date: Friday, 07th August 2026 Time: 11:00 AM (IST) Access Numbers +91 22 6280 1309 Primary Number: +91 22 7115 8210 International Toll Free: Hongkong 80096 4448 Singapore 80010 12045 UK 080810 11573 USA 186674 62133 You can pre-register for the call by clicking on the link below: Chemplast Earnings Call Participants: Mr. S Ganeshkumar, Managing Director Mr. A R Balaji, Chief Financial Officer Dr. Krishna Kumar Rangachari, Business Head - Custom Manufactured Chemicals Division Mr. N Muralidharan, Executive Director, Finance We look forward to your participation RSVP Shikha Puri /Aashaka Thakar Strategic Growth Advisors Pvt. Ltd. Contact: +919819282743 / +919328603124