Why Does Unimech Depend on so Few Customers?
Unimech’s customer concentration is not simply a consequence of having too few sales relationships. It is built into the way the company wins aerospace and precision-engineering business: customers first qualify the supplier, inspect manufacturing capabilities, complete first-article inspections and then gradually move approved products into production.
That process creates stickiness once a supplier is qualified, but it also means a small number of successful programmes can account for a large share of revenue.
Unimech’s FY26 annual report shows that its three largest customers contributed 62.17% of revenue, with the largest accounting for 36.77%. The company does not identify these customers by name in the filing.
That disclosure needs to be read alongside Unimech’s operating model. The company describes itself as a qualification-led manufacturer serving OEMs and Tier-1 suppliers, with products ranging from aerospace tooling to precision components and assemblies. During Q1 FY27 alone, it completed 165 First Article Inspections (FAIs) and began engaging six additional prospective customers at different stages of technical evaluation, qualification and commercial discussion.
This explains why revenue can remain concentrated even while the customer pipeline expands. Winning a customer is not the same as generating meaningful recurring revenue from that customer.
Why These Relationships Take Time to Build
Unimech’s concentration becomes easier to understand when the qualification process is considered.
The company is not selling standardised components where a customer can switch suppliers simply by comparing prices. New programmes require manufacturing capability, technical evaluation, first-article inspection and customer approval.
Management’s FY27 commentary provides direct evidence of this process. Unimech completed 165 FAIs in Q1 FY27, while six additional prospective customers were still at technical-evaluation, qualification or commercial-discussion stages. Management also said that not every qualification will necessarily convert into production orders.
The FACC agreement illustrates the progression. Unimech signed a US$7.5 million, five-year long-term supply agreement for aerospace components, which management described as the company’s entry into recurring aerospace component supplies under a long-term programme.
This is the missing link between customer concentration and business quality: one qualified customer can eventually generate recurring revenue, but getting from qualification to recurring production takes time.
What Does the Largest Customer Actually Mean for Revenue Risk?
The concentration can be made more tangible using Unimech’s FY26 consolidated revenue of ₹240.49 crore.
Using the 36.77% largest-customer contribution disclosed in the FY26 annual report, that customer represented approximately ₹88.42 crore of revenue.
The following is a mechanical sensitivity analysis, assuming all other revenue remains unchanged:
| Reduction in largest customer’s orders | Revenue loss | Consolidated revenue | Revenue decline |
| 10% | ₹8.84 Cr | ₹231.65 Cr | 3.68% |
| 20% | ₹17.68 Cr | ₹222.81 Cr | 7.35% |
| 30% | ₹26.53 Cr | ₹213.96 Cr | 11.03% |
The effect on PAT can also be illustrated, but it needs to be treated as a constant-margin sensitivity, not a forecast. FY26 PAT was ₹63.28 crore, implying a PAT margin of 26.31%. If that margin were unchanged:
| Reduction in largest customer’s orders | Mechanical PAT impact* |
| 10% | -₹2.33 Cr |
| 20% | -₹4.65 Cr |
| 30% | -₹6.98 Cr |
*This assumes the lost revenue carries the same PAT margin as the existing business. Actual PAT could fall by more or less because fixed costs, product mix and capacity utilisation would change.
Capacity utilisation makes the second-order effect more important. Unimech had indicated utilisation of around 50-55% as new capacity was being absorbed.
If 55% is used purely as a sensitivity baseline and production hours move proportionally with revenue, a 10%, 20% and 30% reduction in the largest customer’s orders would take utilisation to approximately 52.98%, 50.96% and 48.95%, respectively.
That calculation is illustrative rather than a forecast because other customers can absorb capacity. But it demonstrates why customer concentration matters beyond the headline revenue number: a weaker programme can reduce both revenue and the utilisation of recently added manufacturing capacity.
Hobel Does Not Immediately Diversify the Customer Base
Hobel Bellows makes the issue more interesting rather than solving it automatically.
Approximately 93% of Hobel’s revenue comes from two large OEM groups. The public disclosures do not identify those OEM groups by name, so they should not be guessed.
What is documented is the nature of the business: Hobel has more than 30 years of experience supplying metallic bellows, flexible tubing, expansion joints, exhaust systems and tubular assemblies to global OEMs in automotive, locomotive, power-generation and general-engineering applications.
Management has indicated that Hobel’s near-term strategy is not to immediately abandon these relationships. The first objective is to increase wallet share with existing customers and then win other companies in the same locomotive, genset and energy markets. Nuclear and other industries are intended to become medium-term opportunities, while aerospace and semiconductor applications require additional qualifications.
This makes Hobel’s concentration different from simply having two large customers that happen to buy a standard product. Its products are technically specialised and, according to management, many customer applications involve established relationships and qualification requirements.
The acquisition therefore gives Unimech access to a concentrated but established OEM customer base. The strategic question is whether those relationships can be used as references and entry points into additional programmes.
Can Hobel Actually Create New Customers?
There is already some evidence that Unimech is trying to use Hobel as a customer-expansion platform rather than merely adding its existing revenue.
Management said discussions were underway with two new customers, one in locomotives and one in power generation, with technical evaluations and commercial submissions in progress and an expectation of onboarding by the end of FY27 subject to qualification.
At the same time, Unimech is targeting new markets for Hobel’s capabilities. Its Vizag facility has started the AS9100 certification process, targeted for completion by Q4 FY27, which could allow Hobel’s manufacturing capabilities to enter aerospace and semiconductor qualification processes.
The roadmap is therefore more specific than simply saying “diversification”:
Near term: increase wallet share with existing locomotive, genset and energy customers.
Next: add other locomotive and power-generation OEMs.
Medium term: qualify Hobel capabilities for nuclear and additional industrial applications.
Longer term: use the facility’s certification and manufacturing capabilities to pursue aerospace and semiconductor customers.
The important point is that most of these opportunities are still qualification or commercial-discussion opportunities, rather than already-established revenue streams. To know more, check our latest video.
What Would Meaningful Diversification Actually Look Like?
Unimech does not need hundreds of customers to eliminate concentration. It needs enough new revenue streams to reduce the economic importance of its largest accounts.
A useful investor test is therefore to track three numbers together:
- Largest customer: currently 36.77% of FY26 revenue disclosed in the annual report.
- Top three customers: currently 62.17%.
- New-customer revenue: the amount generated by customers that were not part of the historical concentration base.
For example, if Unimech added new customers generating ₹25 crore of annual revenue while total revenue remained ₹240.49 crore, those customers would represent roughly 10.4% of the existing FY26 revenue base. A ₹50 crore new-customer pool would represent roughly 20.8%.
The more meaningful milestone is not simply adding six names to a customer list. It is converting qualification programmes into recurring revenue large enough to reduce the share of the existing largest accounts.
That is why the FACC five-year agreement, the two prospective Hobel customers, the six new qualification engagements and the ongoing nuclear, semiconductor and precision-component programmes matter. They represent different routes through which Unimech can build revenue outside its historical concentration.
The Real Risk Is Customer Concentration Plus Programme Concentration
Unimech’s customer concentration should therefore not be treated as an automatic sign of weak customer relationships.
The company operates in businesses where qualification, technical capability and customer approval can produce long relationships. That can make an established account more valuable than a large number of small, transactional customers.
But the same model creates a vulnerability: a small number of programmes can determine a large portion of annual revenue.
The risk becomes more serious if a major customer’s programme is delayed, procurement is reduced or production schedules change before newer customers have reached serial production.
Conversely, concentration becomes less important if FACC-type recurring programmes, nuclear orders, semiconductor qualifications and Hobel’s new customer discussions convert into meaningful production revenue.
The next stage of Unimech’s growth should therefore be measured through a more specific set of indicators:
largest-customer share ↓
top-three share ↓
new-customer revenue ↑
FAIs converting into production ↑
recurring component revenue ↑
Hobel customers beyond its existing two OEM groups ↑
That provides a much more useful test than simply asking whether Unimech has “more customers.”
Conclusion
Unimech’s customer concentration is partly a consequence of its qualification-led business model. The company has to invest time and manufacturing resources before a new OEM programme becomes recurring revenue, which helps explain why a relatively small group of established customers can dominate sales.
But the concentration is still financially meaningful. Based on the FY26 annual-report disclosure, the largest customer accounted for 36.77% of revenue and the top three accounted for 62.17%. A 20% reduction in orders from the largest customer, for example, would mechanically remove about ₹17.68 crore of annual revenue before considering any offset from new customers.
Hobel introduces a similar issue: 93% of its revenue comes from two OEM groups. Its value to Unimech will therefore depend not simply on retaining those customers, but on using Hobel’s bellows, tubing, forming and assembly capabilities to enter additional locomotive, power-generation, nuclear, aerospace and semiconductor programmes.
The evidence of diversification is beginning to emerge through FACC’s five-year supply agreement, six new qualification engagements and two prospective Hobel customers. But these programmes still have to convert into recurring production.
For investors, the most important change to watch is therefore not another large order-book number. It is whether new customers begin contributing enough recurring revenue to reduce the economic weight of the existing largest accounts.
