Sterlite Tech. (532374) Nov 2025 Filing Analysis

Secure and execute multi-year European telecom supply commitments. — target: 2–3-year Long-Term Supply Agreement (+4 more commitments)

The technology moat broadened from 750-plus patents in Q2 FY26 to more than 785 patents in the later baseline, while new products such as Multiverse multi-core fibre, ultra-high-density Celesta cables, hollow-core fibre and AI-powered fibre sensing were being developed. This represents a positive strengthening of intellectual property and product differentiation. (2 expanding)

Optical Networking profitability improved materially within the older document period: H1 FY26 EBITDA margin rose to 14.1% from 12.0% in the prior year. Management also stated that operational EBITDA margin reached 16.7% in Q2 FY26, compared with 11.2% in Q2 FY25, although reported margins were reduced by about 300 basis points because of US tariffs. The later baseline reports an approximately 21.8% segment EBITDA margin in Q1 FY27, so the positive margin trajectory continued. (5 expanding)

Optical Networking was already the dominant business in H1 FY26, generating Rs. 1,941 Cr in revenue. It remains the core engine, but its share of the explicitly reported H1 FY26 segment revenue was approximately 96.8% (Rs. 1,941 Cr of Rs. 2,006 Cr), compared with approximately 96.2% in the baseline Q1 FY27. This indicates a broadly stable-to-slightly higher share over time; the latest baseline also shows a much larger absolute revenue scale. (5 expanding)

Optical connectivity attach rate increased from 20% in FY25 to 22% in H1 FY26. This indicates a steady improvement in the share of higher-value connectivity products sold alongside fibre cable. The company also states that increasing the attach rate remains a FY26 priority. (2 steady, 1 decelerating, 1 accelerating, 1 new trend across 5 signals)

Demand momentum was stronger in Q2 FY26 than in the preceding downturn: global optical demand turned positive after two years of decline, H1 optical revenue grew 6% to INR 1,941 crore, and order intake more than doubled year-on-year. Management also cited FTTH, 5G densification and data-centre expansion as multi-year growth drivers. Nevertheless, the company had only about 7% global optical-fibre cable market share and was targeting further share gains, while its growth case relied on several external investment cycles. The later baseline's more than fourfold FY26-FY29 revenue ambition makes the long-term demand risk substantially more severe. (4 intensifying, 1 easing)