Please find attached herewith a copy of the Conference Call transcript in respect of Q1FY2026-27 Earnings/Conference call meeting of the Company dated 13th August, 2026.

Ref.RIR/SEC/13928/2026 18th August, 2026 Bombay Stock Exchange Limited The Manager – Listing Department Corporate Relationship Department, National Stock Exchange of India Ltd., 1st Floor, Rotunda Building, Exchange Plaza, C-1, G-Block, P. J. Towers, Dalal Street, Bandra Kurla Complex, Bandra (East), Mumbai-400001 Mumbai - 400051 BSE SCRIP Code : 517035 NSE Symbol : RIR Subject.: Transcript of Q1 FY2026-27 Earnings/Conference call meeting Ref: Disclosure under Reg.30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 Dear Sir/Madam, Please find attached herewith a copy of the Conference Call transcript in respect of Q1FY2026-27 Earnings/Conference call meeting of the Company dated 13th August, 2026. This is for your information and record. Thanking you. Yours faithfully, For RIR Power Electronics Limited Bhavin P Rambhia Company Secretary Encls : a/a “RIR Power Electronics Limited Q1 FY'27 Earnings Conference Call” August 13, 2026 MANAGEMENT: DR. HARSHAD MEHTA - NON-EXECUTIVE CHAIRMAN MR. N. RAMESH KUMAR - MANAGING DIRECTOR AND CHIEF EXECUTIVE OFFICER MR. ANKIT SHAH - CHIEF FINANCIAL OFFICER MODERATOR: MR. ABHISHEK SAWANT - VERITAS REPUTATION Page 1 of 13 RIR Power Electronics Limited August 13, 2026 Moderator: Ladies and gentlemen, good day and welcome to RIR Power Electronics Limited Q1 FY'27 Earnings Conference Call hosted by Veritas Reputation. As a reminder, all participant lines will be in the listen-only mode and there will be an opportunity for you to ask questions after the presentation concludes. Should you need assistance during this conference call, please signal an operator by pressing “*” then “0” on your touch- tone phone. Please note that this conference is being recorded. I now hand the conference over to Mr. Abhishek Sawant from Veritas Reputation. Thank you and over to you, sir. Abhishek Sawant: Thank you, Nirav, and good morning, everyone. On behalf of RIR Power Electronics, I extend a warm welcome to all participants joining us for the Q1 FY'27 Earnings Conference Call. We appreciate your time and interest in joining us today to discuss the company's performance for the quarter ended June 30th, 2026. We truly value your continued interest and support. As you are aware, the Financial Results for Q1 FY'27 have already been disclosed to the stock exchanges and are also available on our website. Accordingly, today's session is designed to provide deeper insights into our operational progress, industry outlook, and the company's long- term value creation. Following the opening remarks by our management, we will open the floor for a quick Q&A session. Kindly keep your questions concise and relevant to allow broader participation. Before we begin, I would like to remind you that some of the statements made in today's discussion may be forward-looking in nature. These are based on the company's current expectations and subject to various risks and uncertainties that could cause actual results and outcomes to differ materially. Joining us on the call today are Dr. Harshad Mehta – Non-Executive Chairman, Mr. N. Ramesh Kumar – Managing Director and Chief Executive Officer, Mr. Ankit Shah – Chief Financial Officer. With that, I would like to hand over the call to our Managing Director and Chief Executive Officer for the update on financial performance and overlook. I would like to clarify that we are discussing the historical numbers. Please do note that anything said on this call that reflects the outlook towards the future would be constructed as a forward-looking statement. Having said that, we would like to take you through the Q&A results. Over to you, sir. N. Ramesh Kumar: Good morning, everyone. Once again, I thank you all for joining us today for RIR Power's Q1 FY'27 Earnings Call. My name is Ramesh Kumar. I am the Managing Director and Chief Executive Officer, and it is my pleasure to walk you through the company's performance for the Page 2 of 13 RIR Power Electronics Limited August 13, 2026 quarter ended June 30, 2026, followed by the key operational updates and the outlook going forward. We started Q1 FY'27 on a very strong note, with revenue growing by 29.3% year-on-year to Rs. 27.16 crores, along with an 80.6% growth impact, reflecting the continued improvement in our operating performance and profitability. EBITDA for the quarter came in at 3.98 crores. Earnings per share for the quarter stood at 39 paisa per share. In terms of operations, we continue to make steady progress across our key initiatives. Update on our Odisha facility: With respect to our upcoming facility in Odisha project is in two phases. Phase one consists of epitaxy and packaging, and phase two is fabrication. The clean room construction is completed for epitaxy. Infrastructure for sourcing the power supply through 33 kV line has been completed. Further, the transformer is also charged yesterday by the authorities, and we will be able to draw the power in next 1 or 2 days. The plant and machinery installation is under progress and estimated to be completed by end of this month or mid-September. We expect to commence epitaxy operations in the end of second quarter FY'27. With respect to the revenue from Odisha plant, we will be selling epi wafers to fabricators outside India, and also getting SiC devices manufactured will be outsourced with the epi wafer for validation and revenue generation in FY'27. So, other updates going forward: We continue to make steady progress across many other key initiatives. Some of them include the listing of RIR Power Electronics on NSE with the trading having commenced on 16th July 2026. This listing on NSE is expected to enhance our liquidity, broaden the investor base, improve price discovery, and strengthen the company's visibility in the capital markets. The company has strengthened its board with an appointment of Mr. Vivek Patel as an Independent Director. He brings expertise in areas such as institutional governance, policy oversight, budgeting, risk management, and long-term strategic planning. Mr. Ankit Shah, Chartered Accountant, who has been associated with RIR Power for the past 1-1/2 years as a Financial Controller, has been elevated and appointed as a Chief Financial Officer. Also building on its recent momentum, RIR continues to strengthen its international footprint following its first overseas order for 120 numbers of 125 mm 5 kV SCR thyristors, reinforcing our competitiveness in the semiconductor products. We have also manufactured high-power semiconductors like 5 kV to 8 kV press-pack SCR thyristors, high-voltage modules, and silicon carbide devices. These components drive critical defense applications, pulse power systems, and high-voltage direct current transmission infrastructures by managing immense surge in current and high-voltage blocks. The company showcased its latest railway power electronic solution at RailTrans Expo 2026. The event further strengthened RIR's engagement with India's rapidly evolving railway infrastructure ecosystem. Thank you. Over to Abhishek. Page 3 of 13 RIR Power Electronics Limited August 13, 2026 Abhishek Sawant: Thank you, Mr. Ramesh Kumar, for sharing the summary of the quarterly results and updates on other operational and development matters. I would now like to hand over the call to Dr. Harshad Mehta for his comments on the results. So, over to you, sir. Harshad Mehta: Thank you, Abhishekji and Rameshji. Good morning, everyone. I am adding my personal welcome to all of you and thank you for your support as well as time. The first quarter of FY'27 has been a defining period for RIR Power Electronics as we continue to strengthen our position in India's power semiconductor ecosystem. Our successful listing on NSE marks an important milestone in our growth journey, enhancing our visibility among investors while reinforcing our commitment to creating long-term value for shareholders. We remain focused on expanding our advanced semiconductor [Showing first 8,000 characters — download PDF for full document]