/** blogpostTitle: STL Q1 FY27: Record Orders, Data Center Mix Shift */

STL Q1 FY27: Record Orders, Data Center Mix Shift

Sterlite Technologies Limited reported its strongest quarter to date in Q1 FY27. Consolidated revenue rose to INR 1,910 crore, with EBITDA of INR 397 crore and PAT of INR 197 crore. The EBITDA margin expanded to 20.8%. Management attributed the performance to a stronger mix, operating leverage, and a sharp pickup in demand from hyperscale data centers.

The quarter also marked a step-change in commercial momentum. Order intake for Q1 FY27 was INR 13,100 crore, and the open order book stood at INR 18,618 crore. Management highlighted a multi-year US$1.11 billion Product Award Letter from a hyperscaler, covering supply of optical connectivity products from FY27 to FY29 for next-generation AI data centers.

What changed in the revenue mix

STL presented a visible shift in customer segment mix. Data Center and Cloud contributed 21% of revenue in Q1 FY27, compared with 1% in FY26. Large Enterprise contributed 18% versus 17% in FY26. Telecom and Citizen Networks remained the largest segment at 61% in Q1 FY27, down from 82% in FY26.

Geographically, Americas contributed 54% of revenue in Q1 FY27 versus 39% in FY26. Europe contributed 25% versus 39% in FY26, while the rest of the world stayed at 22%.

Management also raised its expectation for the year. The company expects the combined Data Center and Enterprise segments to scale to about 50% of FY27 revenues, higher than the 30% guidance referenced from the prior earnings call.

Financial snapshot (consolidated)

Orders, backlog, and execution visibility

The company’s backlog expanded materially. The open order book stood at INR 18,618 crore at the end of Q1 FY27, up from INR 7,687 crore at the end of FY26. STL disclosed that INR 2,228 crore of backlog is scheduled for execution in Q2 FY27, with INR 16,390 crore scheduled for Q3 FY27 and beyond.

Management reiterated that the order book is diversified across customer segments, product categories, and regions. Beyond the headline hyperscaler award, the company said it also secured multiple hyperscaler orders of over US$100 million for the Neuralis portfolio and a strategic long-haul order to supply dark-fibre high-density micro-cables.

Importantly, management did not provide revenue guidance. It also clarified that the executable order book number for Q2 does not translate into revenue guidance.

Strategy and product positioning: AI data centers and attach rate

STL continues to frame its positioning as an end-to-end optical manufacturer, describing a “glass to gigabit” capability across silicon processing, preform creation, fibre drawing, cable manufacturing, and connectivity products.

The quarter’s narrative leaned heavily into AI-led data center growth. Management cited external sources such as CRU and Morgan Stanley to support a multi-year upcycle, including a 63% year-on-year growth projection for global optical cable demand from data centers in 2026.

On the product side, STL highlighted its Neuralis AI-era data center portfolio and a milestone in achieving US Conec certification for MMC pre-terminated solutions, which it said enables 3x cabling density versus traditional MPO layouts.

The company also launched CONCAT, a pre-connectorized plug-and-play solution for FTTH deployments in the U.S. STL claimed CONCAT can deliver up to 71% labor cost savings by reducing field splicing through factory-assembled segments.

Another commercial lever is the optical connectivity attach rate, defined as optical connectivity revenue divided by OFC revenue. The attach rate was 16% in Q1 FY27 versus 15% in FY26. Management stated it is focused on scaling the attach rate above 20% from Q2 onwards and to 25% plus by Q4 FY27.

Balance sheet, QIP, and capex plans

STL reported a net cash balance of INR 483 crore and stated it has achieved net debt free status. Credit rating agencies reflected this change, with CRISIL revising the outlook to Stable and reaffirming AA- long-term and A1+ short-term ratings, and ICRA upgrading the long-term rating to AA (Stable).

The company also completed a INR 1,500 crore Qualified Institutional Placement. It stated 75% of proceeds will be used for deleveraging and 25% for general corporate purposes. Post QIP, promoters hold 42% and institutional shareholding is above 33%.

On investments, management guided for about INR 500 crore of capex per year for the next three years, focused on equipment upgrades and debottlenecking across glass, fibre, cable, and connectivity.

Key risks and watch points from disclosures

While operational performance improved sharply, two areas need close monitoring.

First, management acknowledged input cost pressure. The CFO said gross margins faced pressure due to higher raw material costs, linked to global conflict conditions. The company expects improvement over time, but the sensitivity remains.

Second, the financial notes disclosed a material litigation matter involving Sterlite Technologies Inc., a U.S. subsidiary. A court confirmed a total award of US$101.25 million. The subsidiary has filed an appeal and deposited a bond of US$41.53 million. The company stated the ultimate financial implications cannot be ascertained at this stage.

Takeaways

Q1 FY27 established STL’s pivot toward the data center opportunity with measurable outcomes: a strong segment mix shift, record order intake, and a sharp margin step-up. Management upgraded EBITDA margin guidance to 23% and reiterated targets to raise attach rate to 25% plus by Q4 FY27.

At the same time, investors will want to track how margins behave as raw material costs fluctuate and how the U.S. litigation evolves. Execution of the expanded order book, and the company’s ability to scale capacity through planned debottlenecking capex, will be the key markers for the rest of FY27.