The Aryavarth Express Mumbai (Maharashtra) | January 23: STL (NSE: STLTECH), a leading global provider of connectivity solutions for AI-ready digital infrastructure, on Thursday announced its financial results for the quarter ended December 31, 2025, reporting strong revenue growth and continued margin improvement.
For Q3 FY26, STL posted revenues of ₹1,257 crore and EBITDA of ₹129 crore, reflecting year-on-year growth of approximately 26 per cent and 16 per cent, respectively.
The company reported its fifth consecutive quarter of sequential improvement in operational EBITDA margins, driven by a higher-margin product mix and increased contribution from the US market. With the US–India Bilateral Trade Agreement currently under advanced discussions, STL said it remains well positioned to capitalise on emerging opportunities in building AI-ready digital infrastructure.
Optical Networking and Digital Business Performance
In Q3 FY26, STL’s Optical Networking Business (ONB) recorded revenues of ₹1,174 crore and EBITDA of ₹131 crore. With operations now closer to key markets in North America, Europe and Asia, the company said it is well placed to meet evolving customer demands for next-generation digital infrastructure. Capacity expansions and glass-to-terabit connectivity solutions have begun delivering positive outcomes, supported by a strong focus on data centre-centric product innovation and co-creation.
STL Digital expanded its global footprint during the quarter with new customer acquisitions, taking its total client base to 34 global customers. The company also secured a multi-million-dollar contract from a US-based pharmaceutical major for SAP S/4 HANA implementation across multiple geographies.
Key Wins and Innovation Highlights
STL reported strong order momentum across the US, UK, Europe and Asia, including wins from Tier-1 North American telecom operators and large-scale Data Centre Interconnect (DCI) projects. During the quarter, the company secured orders exceeding ₹500 crore for its Data Centre portfolio, supplying advanced solutions for next-generation, AI-ready data centre infrastructure.
On the innovation front, STL collaborated with Colt Technology Services to conduct Multi-Core Fibre (MCF) trials across Colt’s London Metro optical network. The company expanded its IBR portfolio with a 1,728-fibre and a DC-specific 3,456-fibre high-count variant, along with a 432-fibre, 200-micron fibre HD microcable. STL is also developing next-generation fibre technologies, including Hollow-Core Fibre (HCF) and G.654.E, in close collaboration with customers. As of the end of Q3 FY26, STL’s intellectual property portfolio stood at 780 patents filed and granted.
Management Commentary
“STL delivered a strong quarter with healthy revenue growth and robust order momentum across key global markets,” said Ankit Agarwal, Managing Director, STL. “Our technology leadership in next-generation fibre and data centre solutions, combined with a sharp focus on customer outcomes, continues to differentiate us. We remain committed to building AI-ready digital infrastructure at a global scale while driving innovation, efficiency and long-term value for our stakeholders.”
All financials pertain to continuing operations.
About STL
Sterlite Technologies Ltd (STL) is a global leader in advanced connectivity solutions, offering end-to-end products and services for AI-ready infrastructure, FTTx, rural, enterprise and data centre networks. With manufacturing facilities across North America, Europe and Asia, STL serves customers in over 100 countries, including telecom operators, data centre and cloud companies, internet service providers and large enterprises.
