Sigma Advanced Systems is a pure-play aerospace and defence company that designs and builds the electronic brains and precision components inside missiles, fighter jets, naval platforms, and counter-drone systems - the invisible layer that makes modern defence platforms work. It was born from a 2025 merger that folded a three-decade-old defence design house into a listed entity that had already shed its telecom and IT past, creating a single platform with manufacturing footprints in India and the UK and a deliberate strategy of buying niche capabilities to climb the value chain. The recurring approach is simple: own the intellectual property in mission-critical sub-systems, manufacture them across a dual-country base, and use acquired European subsidiaries as bridges to NATO and global export orders - then pull that work back to India to make it more profitably. # Business segments Three engines at different stages - a five-decade UK aerospace components business that supplies every major Western engine programme, an Indian defence sub-systems franchise built on thirty-year relationships with the armed forces, and a young export-bridge entity that turns European joint ventures into Indian factory orders. ## 1. Nasmyth: the aerospace components factory that supplies the West's engines and airframes **A five-decade-old UK manufacturer of the metal parts that sit inside the hottest sections of jet engines and the structural ribs of wide-body aircraft, selling to virtually every Western aerospace prime.** - **Makes the parts that cannot fail** - Nasmyth produces Class I components for aero-engine hot sections (heat shields, bearing houses, exhaust casings, nose cones) and critical airframe structures (ribs, beams, fuel systems, engine cowls), the kind of parts where a defect means an engine failure. - **On every major Western platform** - its components fly on the Rolls-Royce Trent family that powers the A330, A350, and B787, the Eurofighter's EJ200 engine, the F-35's supply chain, and the A320's V2500, giving it a spread across commercial and defence programmes. - **Commercial aerospace pays three-quarters of the bills** - roughly 75% of Nasmyth's revenue comes from commercial aviation, with the remaining 25% from defence platforms, so it rides the civil aviation cycle while maintaining defence diversification. - **Six factories, 470 skilled hands** - the UK base spans six sites with over 200,000 square feet of facilities, each with a distinct specialism: precision machining of exotic alloys, metal surface treatments for large components, fine grinding of sectioned rings, advanced titanium fabrication, sheet metal welding, and final assembly. - **The delegatory approval is the unlock** - Nasmyth holds certifications that allow work to be transferred to India in four to six months instead of the typical timeline, a 70%-plus reduction that lets Sigma shift manufacturing to its lower-cost Indian facilities while keeping the customer relationship in the UK. ## 2. Defence sub-systems: the electronic backbone of India's missiles, aircraft, and warships **A three-decade development partner to India's defence establishment, designing and manufacturing the servo systems, flight computers, and radar electronics that go into the country's frontline platforms.** - **Half the revenue is missiles** - the typical split is 50% missile sub-systems (rear servo systems, amplifiers, end-game packages for LRSAM, MRSAM, and other programmes), 25% avionics, 15% naval systems, and 10% other defence electronics. - **Build-to-spec and build-to-print under one roof** - Sigma both designs new sub-systems from scratch alongside defence labs (build-to-spec) and manufactures to government-provided blueprints (build-to-print), covering the full lifecycle from design through environmental testing. - **Inside the cockpit and the torpedo** - its avionics work includes flight data recorders and head-down displays for the Su-30 and Hawk 132, while its naval portfolio reaches into heavyweight torpedo rudder control electronics and submarine power distribution systems. - **Thirty-year relationships with the customer** - its domestic buyers are the organisations that build and operate India's military platforms: DRDO, HAL, Bharat Dynamics, the Indian Air Force, and the Tri-Services, relationships that are hard for newcomers to replicate. - **Counter-drone systems are the new frontier** - Sigma makes the radar, sensing, jamming, and spoofing sub-systems for counter-UAS platforms, including an exclusive supply arrangement with Indrajaal, a specialist in autonomous airspace defence in which Sigma invested in 2023. ## 3. AS Strategic: the export bridge that turns European partnerships into Indian production **A Delhi-based holding company with joint ventures in three European defence primes, designed to channel NATO and EU defence orders into Sigma's Indian factories.** - **A 51% stake in a partnership factory** - Sigma owns just over half of AS Strategic, which in turn owns 51% of three joint ventures with European defence manufacturers: Abra Works, EM&E, and Arquimea, with the European partner holding 49% in each. - **Orders flow from NATO to India** - the model works like this: a customer in the UK, Europe, or NATO places an order with the European JV partner, who sub-contracts the work to the joint venture, where Sigma has first right on the workshare and can insource manufacturing to its own facilities. - **Eight teaming agreements already active** - beyond the three equity joint ventures, AS Strategic has signed eight additional teaming agreements with global OEMs, giving Sigma a direct line into European and NATO defence programmes without having to win each contract cold. - **Nasmyth provides the European address** - because Sigma already owns a UK manufacturing base through Nasmyth, the AS Strategic partnerships come with a credible local presence, which matters for export-controlled defence work. - **Small revenue today, a pipeline for tomorrow** - AS Strategic's turnover was about ₹6 crore in the year to March 2025, up from virtually nothing two years earlier, so it functions less as a profit centre and more as an origination engine for future manufacturing orders. # Group structure and partners **The listed entity sits atop a clean two-geography structure: an Indian defence R&D and manufacturing base, a wholly owned UK aerospace subsidiary, and a majority-owned Delhi export-bridge company that holds three European joint ventures.** - **The parent is the former Megasoft, renamed** - Sigma Advanced Systems Limited is listed on the BSE and NSE, having changed its name from Megasoft Limited in January 2026 after absorbing the private defence firm Sigma through a court-approved merger. - **Promoters hold just over half** - post-merger, Chintalapati Holdings owns about 46% and Hillpark Event Management about 6%, both having received shares through the amalgamation rather than open-market purchases. - **Nasmyth is the 100%-owned UK anchor** - acquired in October 2025 through a wholly owned UK subsidiary, it is the group's largest operating business and the source of its international aerospace revenue. - **AS Strategic is the 51%-owned European gateway** - bought in April 2026 for ₹20 crore in cash, it holds the three European JV stakes and the teaming agreements that connect Sigma to NATO programmes. - **The pharma detour is fully unwound** - the group's earlier investment in Swiss pharmaceutical company Extrovis AG was divested in March 2026 for $15 million, and the legacy telecom and IT businesses were divested between 2022 and 2023, leaving a clean defence-and-aerospace platform.