Enclosed is the Annual Report FY 26 including 23RD AGM notice.

17-08-2026 BSE Limited National Stock Exchange of India Limited Phiroze JeeJeebhoy Towers, Exchange Plaza, Plot no. C/1, Dalal Street, G Block, Bandra-Kurla Complex Fort, Mumbai – 400 001 Bandra (E), Mumbai - 400 051 Scrip Code: 543318 Trading Symbol: CLEAN Subject: Notice of 23rd Annual General Meeting (“AGM”) and Annual Report for the Financial Year 2025-26 and Book Closure for AGM and Dividend. Dear Sir/Madam Further to the intimation dated 1st August,2026, the 23rd AGM of the members of the Company will be held on Saturday, 12th September, 2026 at 12 Noon (IST) through Video Conference/Other Audio- Visual Means Pursuant to Regulation 34(1) of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations, 2015”) please find enclosed the Annual Report for the financial year 2025-26 along with Notice of the 23rd AGM (including e-voting instructions). Further, pursuant to Regulation 42 of SEBI Listing Regulations, 2015, and as earlier informed the Register of Members and Share Transfer Books will remain closed from Sunday, 6th September, 2026 to Saturday, 12th September, 2026 (both days inclusive) for the purpose of Annual General Meeting and payment of dividend to be declared. The aforesaid documents are being despatched electronically to the members whose email ids are registered with the Company/Registrar and Transfer Agents/Depository Participants. The above information is also available on the website of the Company https://cleanscience.co.in/wp-content/uploads/2026/08/CSTL-AR-2025-26_final.pdf You are requested to take the same on record. Thanking You. For Clean Science and Technology Limited Ruchita Vij Company Secretary and Compliance Officer Encl:- as above ACROSS THE PAGES Corporate Overview Financial Statements 01 188 About the Company 2 Standalone 189 Message from the Executive Vice Chairman 4 Consolidated 255 Message from the Managing Director 8 Manufacturing Facilities 12 Journey and Milestones 14 Geographic Presence 16 Product Portfolio 18 Core Strengths 22 CFCL: Redefining Chemistry 26 Financial Highlights 28 Value Creation Model 30 For more investor-related Research and Development 32 information, scan the QR code above or click on the below link: Environment 34 https://cleanscience.co.in/investors/ Social 36 Governance 40 Investor Information Rank based on Market 504th Rank Statutory Reports Capitalisation (average market capitalisation for the period 1st July, 2025 to 31st December, 2025) Notice 42 CIN L24114PN2003PLC018532 BSE Code 543318 Board’s Report 61 NSE Symbol CLEAN Corporate Governance Report 98 Final Dividend Declared ₹ 4 per share AGM Date 12th September, 2026 Management Discussion and Analysis 131 AGM Mode Video Conferencing (VC) or Other Business Responsibility and Sustainability Audio-Visual Means (OAVM) Report (BRSR) Disclaimer: This document contains statements about expected future events and financials of Clean Science and Technology Limited (‘the Company’), which are forward-looking. By their nature, forward-looking statements require the Company to make assumptions and are subject to inherent risks and uncertainties. There is a significant risk that the assumptions, predictions, and other forward-looking statements may not prove to be accurate. Readers are cautioned not to place undue reliance on forward-looking statements as several factors could cause assumptions, actual future results and events to differ materially from those expressed in the forward-looking statements. Accordingly, this document is subject to the disclaimer and qualified in its entirety by the assumptions, qualifications and risk factors referred to in the Management Discussion and Analysis section of this Annual Report. Built Deep. Scaling Smart. Over nearly two decades, Clean Science and Technology Limited (CSTL) has developed a differentiated specialty chemicals business through catalytic process innovation, process engineering excellence, backward integration, and disciplined manufacturing execution. Sustained investments in research, The interaction between chemistry As the business expands its application development and expertise, integrated value chains, global presence, the focus production capabilities have enabled application capabilities, and scalable remains on extending existing the Company to build proprietary manufacturing infrastructure chemistry platforms into adjacent chemistry platforms with strong cost is creating new avenues for opportunities, improving revenue competitiveness, process reliability growth. This combination enables quality, increasing asset productivity and sustainability advantages. participation in larger addressable and strengthening operating markets, supports the development leverage through smarter systems These capabilities are now being of higher-value products, and and processes. The objective is deployed across a broader range of enhances responsiveness to evolving to translate years of investment opportunities with a sharper focus customer requirements across global in science, technology and on scaling smartly. Products initially markets. It also reflects a smart manufacturing capability into a developed for niche applications approach to growth, where chemistry larger and more globally relevant are gaining acceptance in larger depth, strategic integration, cost performance chemistry business. global markets and wider customer efficiency, asset productivity and bases, reducing dependence customer relevance work together. on a limited set of applications. Established chemistries are moving further downstream into value- added derivatives. Manufacturing infrastructure is supporting a wider range of products while long- standing customer relationships are creating opportunities across new geographies and end-use segments. During the year, the Company expanded its presence in performance chemicals, accelerated the commercialisation of advanced HALS chemistries, strengthened downstream integration and continued to invest in manufacturing and research infrastructure. Export markets assumed a larger role within the portfolio while increasing contributions from specialised products supported an improved product mix. Corporate Overview Statutory Reports Financial Statements About the Company Catalysing Sustainable Innovation. Advancing Global Chemistry. Clean Science and Technology Limited (‘CSTL’ or ‘the Company’) is a leading fine and specialty chemical manufacturer. Through its innovation, process engineering, and operational excellence, the Company operates a scalable, technology-led business model serving the performance chemicals, pharmaceuticals, agrochemicals and FMCG sectors. Vision Mission To be a global To create value chemical company for our customers, most admired for stakeholders, our innovative and employees processes, by developing performance, processes that are reliability, and sustainable and unparalleled service cost-effective in to our customers. nature. 62-5202 tropeR launnA Clean Science Technology Limited Corporate Overview Statutory Reports Financial Statements Core Values INTEGRITY INNOVATION SAFETY At the heart of our ethos lies a At our core, we understand that Ensuring the safety of our dedication to fostering enduring innovation is the lifeblood of employees and customers remains partnerships with our clients and any successful enterprise. We paramount to us. We hold a stakeholders. Integrity stands as prioritise the generation of inventive profound concern for all those the cornerstone of our operations, products and solutions to address connected to our operations and guiding every decision we make, contemporary challenges. In a uphold the highest standards of while our unwavering commitment dynamic world, innovation serves safety through stringent protocols. to eco-friendly manufacturing as the linchpin for securing both underscores our conscientious customer satisfaction and the approach to product development. prosperity o [Showing first 8,000 characters — download PDF for full document]