India’s defence manufacturing sector is expanding rapidly, supported by higher government spending, the Make in India initiative, increasing defence exports, and a stronger focus on indigenous production. While most investors focus on well-known defence manufacturers, a significant part of the value chain lies with the businesses that supply them with critical components, systems, and engineering solutions.
Many of these suppliers are privately held or unlisted companies, making them an interesting area for research in the unlisted shares market. Understanding how India’s defence budget flows through the manufacturing ecosystem can help investors identify opportunities beyond the large listed names.
India’s Rising Defence Budget: Fuel for the Defence Supply Chain
The Government of India has consistently increased defence spending to strengthen national security and accelerate self-reliance in defence manufacturing. For FY 2026–27, the defence allocation stands at approximately ₹7.85 lakh crore (around US$92 billion), accounting for nearly 14.7% of the Union Budget.
A significant portion of this allocation is directed towards capital expenditure, including the procurement of aircraft, helicopters, missiles, naval vessels, armoured vehicles, surveillance systems, and defence electronics. Every major procurement programme generates demand not only for large defence manufacturers but also for hundreds of specialised suppliers across the country.
India’s Defence Budget at a Glance
| Parameter | FY 2026–27 |
| Total Defence Budget | ₹7.85 Lakh Crore |
| Approx. Budget in US Dollars | US$92 Billion |
| Share of Union Budget | 14.7% |
| Global Military Spending Rank | Top 5 |
India in the Global Defence Spending Landscape
India has emerged as one of the world’s largest defence spenders. While the United States and China continue to dominate global military expenditure, India’s growing defence budget reflects its long-term commitment to military modernisation, indigenous production, and technological advancement.
| Country | Defence Budget (Approx.) | Global Rank | Compared with India |
| United States | US$954 Billion | 1 | ~10.4× India’s spending |
| China | US$336 Billion | 2 | ~3.6× India’s spending |
| Russia | US$149 Billion | 3 | ~1.6× India’s spending |
| Germany | US$95 Billion | 4 | Slightly higher than India |
| India | US$92 Billion | 5 | — |
| Saudi Arabia | US$81 Billion | 6 | Lower than India |
| United Kingdom | US$75 Billion | 7 | Lower than India |
| France | US$68 Billion | 8 | Lower than India |
| Japan | US$55 Billion | 9 | Lower than India |
Although India’s defence spending is lower than that of the United States and China, it is among the fastest-growing major defence budgets globally. More importantly, an increasing share of procurement is being awarded to Indian manufacturers under the Atmanirbhar Bharat and Make in India initiatives, creating long-term opportunities across the domestic defence supply chain.
Understanding the Defence Manufacturing Supply Chain
The defence manufacturing ecosystem works through multiple layers. Government agencies create demand, large defence manufacturers design and integrate platforms, and hundreds of supplier companies manufacture the specialised components required to build them.
| Layer | Role |
| Ministry of Defence | Allocates budgets and awards defence contracts |
| Armed Forces (Army, Navy, Air Force & Coast Guard) | Define operational requirements and procure equipment |
| Prime Integrators / OEMs | Design, assemble, test and deliver complete defence platforms |
| Tier-I Suppliers | Supply major systems, assemblies and sub-systems |
| Tier-II Suppliers | Manufacture specialised components and precision parts |
| MSMEs & Precision Manufacturers | Produce machined parts, tooling, forgings, castings and customised components |
Every increase in defence procurement eventually creates demand across this entire ecosystem.
What Are Prime Integrators?
Prime integrators are companies responsible for designing, assembling, testing, and delivering complete defence platforms. They coordinate hundreds of suppliers to manufacture aircraft, helicopters, missiles, naval systems, armoured vehicles, defence electronics, and advanced communication systems.
Some examples include:
- Hindustan Aeronautics Limited (HAL)
- Bharat Electronics Limited (BEL)
- Bharat Dynamics Limited (BDL)
- Tata Advanced Systems
- Larsen & Toubro Defence
- Mazagon Dock Shipbuilders
- Garden Reach Shipbuilders & Engineers (GRSE)
While these companies manufacture the final defence platforms, a substantial portion of the production is carried out by specialised supplier companies.
The Real Investment Opportunity Lies in the Supply Chain
Whenever a major defence manufacturer secures a large order, it creates demand across its supplier ecosystem. Companies involved in precision engineering, aerospace components, electronics, composite materials, forging, casting, wiring harnesses, hydraulic systems, and specialised manufacturing often benefit from these long-term contracts.
As government spending increases, the benefits extend far beyond the prime contractors. Suppliers receive repeat orders for specialised components, making them an important area of research for investors looking beyond the obvious names.
Types of Companies That Supply the Defence Industry
Rather than manufacturing complete defence platforms, supplier companies specialise in specific technologies and components such as:
- Precision machined aerospace components
- Aircraft structures
- Missile components
- Wiring harnesses
- Composite materials
- Hydraulic systems
- Electronic assemblies
- Forgings and castings
- Engine components
- Radar and communication systems
Many of these businesses supply multiple defence programmes simultaneously, reducing dependence on a single project.
Why Unlisted Companies Deserve Attention
Several supplier companies remain privately held despite working with leading defence manufacturers. These businesses often possess:
- Long-term customer relationships
- High entry barriers
- Specialised manufacturing capabilities
- Defence certifications
- Opportunities arising from import substitution
- Increasing export potential
- Strong technical expertise
As India’s defence production continues to grow, these companies could experience sustained business expansion.
What Investors Should Evaluate
Before researching an unlisted defence company, investors should evaluate:
- Customer base and defence partnerships
- Products and manufacturing capabilities
- Defence certifications and quality standards
- Order visibility and long-term contracts
- Capacity expansion plans
- Financial performance
- Export opportunities
- Competitive advantages and technological capabilities
Conducting thorough due diligence is essential, as unlisted investments generally carry higher risks and lower liquidity than listed securities.
Conclusion
India’s defence manufacturing story extends far beyond the companies delivering the final aircraft, missile, or naval platform. Behind every major defence programme is a network of specialised suppliers that manufacture the critical components that make these platforms possible.
With a defence budget of nearly ₹7.85 lakh crore, increasing localisation of manufacturing, and strong policy support under Make in India and Atmanirbhar Bharat, the country’s defence supply chain is expected to witness sustained long-term growth. While the large defence manufacturers often attract the spotlight, supplier companies—particularly those in the unlisted space—may offer investors exposure to the same structural growth trends. For investors interested in unlisted shares, understanding the defence manufacturing ecosystem, monitoring government spending, and researching specialised suppliers can help uncover investment opportunities that extend well beyond the industry’s biggest names.