Synopsis:-Institutional investors have raised their holdings in Sterlite Technologies as the optical fibre maker posts record order inflows, expanding AI data-centre demand and improving margins, positioning it as a key beneficiary of the global digital infrastructure buildout.
Foreign and domestic institutions appear to be warming up to one of India’s leading optical fibre and digital connectivity manufacturers. Fresh shareholding data shows DII holding in the company climbing from 11.43 percent to 13.27 percent, while FII ownership has moved up from 18.22 percent to 19.71 percent, a shift that suggests growing institutional comfort with the company’s medium-term growth story.
Shares of Sterlite Technologies Limited (STL) last closed at Rs.564.15, up 2.79 percent from the previous close of Rs.548.85. The stock currently is at a market capitalization of approximately Rs.29,035.99 crore and trades at a price-to-earnings multiple of around 503.68 times.
So what exactly is drawing institutional money into the stock right now? Here are five developments from STL’s Q4 and FY26 earnings call that help explain the shift in sentiment.
A Record Order Book Is Giving the Company Unusual Revenue Visibility
STL closed FY26 with order inflows of Rs.7,687 crore, more than double the Rs.3,672 crore booked in FY25 and a jump of 109 percent year-on-year. Management attributed this to large data-centre wins in North America alongside long-term contracts signed with Tier 1 telecom operators in India.
The open order book itself grew 67 percent year-on-year to Rs.7,309 crore, of which Rs.1,468 crore is scheduled for execution in Q1 FY27. For a company that has spent the last few years working through raw-material shortages and thin margins, that kind of forward visibility is not something investors have had much of recently.
What stands out is the diversification. Management said the order book now spans multiple customer segments, product categories, and geographies rather than depending on any single large contract, which reduces the risk of a sudden air pocket in revenue if one deal slips.
AI-Led Data Centre Demand Is Becoming a Real Revenue Driver, Not Just a Talking Point
Every fibre optic company on earnings calls these days talks about AI and hyperscalers. What makes STL’s case a little more concrete is the number attached to it: management now expects the Enterprise & Data Centre segment to contribute 30 percent of revenue in FY27, up sharply from 19 percent in FY26.
That is a meaningful jump for a single year, and it comes on the back of the company’s Neuralis portfolio, built specifically for AI-era data centre connectivity, along with new manufacturing capacity in South Carolina aimed at serving US hyperscalers directly.
CRU’s industry estimates back up the broader trend. Global optical cable demand growth for 2026 has been revised up to roughly 6.8 percent year-on-year, with North America expected to be the fastest-growing region through 2030 as AI-linked data centre capacity more than doubles.
Management Is Backing the Growth Story With Real Capital
STL has earmarked approximately Rs.500 crore in capex to expand its high-value optical connectivity portfolio and upgrade its asset base for data centre applications. This is separate from the QIP enabling resolution the company has renewed, which management described as a standing, year-on-year approval rather than a signal of an imminent large fundraise.
Spending money ahead of demand is always a bit of a gamble, but in this case it lines up with what the company is already seeing in its order book and its stated ambition to widen the enterprise and data centre share of revenue. It is a bet that the AI infrastructure cycle has staying power rather than being a short-term spike.
Profitability Is Improving Alongside the Top Line, Not Instead of It
Growth without margin improvement tends to worry investors, and STL’s numbers show both moving in the same direction. FY26 EBITDA rose 39 percent year-on-year to Rs.628 crore, with the full-year margin improving to 13.2 percent. Q4 FY26 revenue came in at Rs.1,441 crore, up 37 percent year-on-year, with quarterly EBITDA margin at 15.1 percent.
PAT has become positive (Rs.56 crore) for FY26 after 2 consecutive years of loss (Rs.57 crore in FY24 and Rs.123 crore in FY25). Management has guided toward a reported EBITDA margin of around 20 percent by the end of FY27, tying that target directly to the data centre segment reaching 30 percent of revenue, since data centre products carry meaningfully better margins than standard telecom-grade fibre.
There are still cost pressures worth watching. Management flagged rising helium and polymer costs linked to geopolitical disruption in West Asia, even as US tariff-related headwinds have eased. The net effect, per management, should still be margin-positive, but it is not a completely clean tailwind.
A Deepening Technology Portfolio Is Widening the Competitive Gap
STL used the call to highlight a cluster of product launches rather than a single headline product. India’s first Hollow Core Fibre cable, which management says can cut network latency by 30 percent to 47 percent, sits alongside the newly launched 654E fibre platform, which offers roughly 30 percent lower signal loss and has already secured its first commercial order.
The company also detailed progress on Multi-Core Fibre, which offers four to seven times higher capacity within the same physical footprint, along with claims of being the first globally to deploy this technology in both aerial and underground networks, including trials with UK operator Colt.
Backing all of this is a patent portfolio that has crossed 780 filings, with 21 added in the March quarter alone. For a capital-intensive, technically complex business like optical fibre manufacturing, that kind of intellectual property base is one of the harder things for competitors to replicate quickly.
What Investors Should Look Out For
While the long-term outlook has strengthened, investors should watch whether the company can convert its Rs.7,309 crore order book into timely revenue while delivering on its target of 30 percent revenue contribution from Enterprise & Data Centre and around 20 percent EBITDA margin by the end of FY27.
Progress on the Rs.500 crore capex, execution of AI-driven data centre orders, and the impact of input cost inflation, particularly helium and polymer prices will be key factors determining whether the current institutional optimism translates into sustained earnings growth.
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