Intimation Regarding Resignation of Secretarial Auditor of the Company.

Date: October 26, 2026 The General Manager, Listing Department BSE Limited Phiroze Jeejeebhoy Towers, Dalal Street Mumbai- 400001 Scrip Code : 540078 Ref: Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements)R egulations, 2015 (LODR) Regulations Sub: Intimation Regarding Resignation of the Secretarial Auditor of the Company. Dear Sir/Madam, Pursuant to Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 ("SEBI Listing Regulations"), read with Part A of Schedule III thereto, and SEBI Circular No. SEBI/HO/CFD/CFD-PoD-1/P/CIR/2023/123 dated July 13, 2023, as amended from time to time (including the circular dated January 30, 2026), we wish to inform you as under: M/s. Haresh Sanghvi, Practising Company Secretary (Membership No. F2259; Certificate of Practice No. 3675), have tendered his resignation as the Secretarial Auditor of the Company, vide letter dated October 26, 2026, with immediate effect. The resignation has been tendered due to reasons stated by them in their resignation letter, a copy of which is enclosed herewith. There is no material reason for the said resignation other than as stated therein, and there is no adverse remark or observation that has a bearing on the financial or operational affairs of the Company. The Board of Directors, shall consider and appoint a new Secretarial Auditor in due course, and the said appointment shall be intimated to the Stock Exchange(s) in accordance with the applicable provisions of the SEBI Listing Regulations. The requisite details as per the format prescribed under the aforesaid SEBI Circular are enclosed as Annexure I. This intimation is being made available on the website of the Company https://www.mitsuchem.com/ Kindly take the same on your records. Yours truly, FOR MITSU CHEM PLAST LIMITED Manish Mavji Dedhia Managing Director and CFO DIN: 01552841 Place: Mumbai Annexure-I Information as required under Regulation 30 - Part A of Para A of Schedule III of SEBI (Listing Obligations and Disclosure Requirements) Regulations 2015 Sr. Particulars Description 1 Reason for change viz appointment, M/s. Haresh Sanghvi, Practising resignation, removal, death or otherwise. Company Secretary, resigned from the office of Secretarial Auditor of the Company due to pre-occupation with the professional assignments and unavoidable professional commitments. 2 Date of appointment/ W.e.f. 26th October, 2026 reappointment/cessation (as applicable) & term of appointment 3 Brief profile (in case of appointment) Not Applicable 4 Disclosure of relationships between Not Applicable directors (in case of appointment of a director) Haresh Sanghvi Practicing Company Secretary The Board of Directors Mitsu Chem Plast Limited 329, Gala Complex, 3rd Floor, Din Dayal Upadhyay Marg, Mulund (West), Mumbai – 400 080 Subject: Resignation as Secretarial Auditor of Mitsu Chem Plast Limited Dear Sirs, I, Haresh Sanghvi, Practicing Company Secretaries, was appointed as the Secretarial Auditor of Mitsu Chem Plast Limited from the financial year 2025-2026 to 2029-2030 pursuant to the provisions of Section 204 of the Companies Act, 2013, read with Rule 9 of the Companies (Appointment and Remuneration of Managerial Personnel) Rules, 2014, Regulation 24A of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, and other applicable provisions. Due to pre-occupation with professional assignments and unavoidable professional commitments, I regret my inability to continue as the Secretarial Auditor of the Company. Accordingly, I hereby tender my resignation from the office of Secretarial Auditor of the Company with immediate effect. I request the Board of Directors to kindly take note of my resignation and make the necessary appointment of another eligible Practicing Company Secretary as Secretarial Auditor in accordance with the applicable provisions of the Companies Act, 2013 and the SEBI (LODR) Regulations, 2015. I confirm that the reason stated above is the only reason for my resignation and there is no other material reason. The management extended full co-operation and provided all information sought by me during my tenure. I take this opportunity to express my sincere gratitude to the Board of Directors, the management, and the officers of the Company for the support and cooperation extended during my tenure as Secretarial Auditor. Kindly acknowledge the receipt of this letter. Thanking you. Yours faithfully, Haresh Sanghvi Practicing Company Secretary FCS No.: 2259 / CoP. No.: 3675 Peer Review Certificate No.: 7788/2026 Date: 26th October 2026 Place: Mumbai A-6, Mazdock, 74/6, J P Road, Seven Bungalows, Andheri (W), Mumbai- 400061 M : 9920124310 email: hpsanghvico@gmail.com