The Fortress vs. The Challenger: A deep dive into India’s two shipbuilding giants

Mazagon Dock Shipbuilders, the Navy’s chosen yard, has been the fortress of India’s maritime defence.

For decades, it built destroyers, frigates (mid-sized warships designed for patrolling, escorting larger vessels and anti-submarine missions), submarines and little else. It did not need to chase orders; the Navy came calling.

Now, Mazagon Dock is no longer the only name shaping India’s shipbuilding story.

Cochin Shipyard is quietly scripting its own sea change, one that could make it India’s first truly global shipbuilder.

The two state-run shipyards share the same roots in public sector enterprise.

Yet they have evolved in very different directions.

Mazagon Dock builds India’s naval might.

Cochin Shipyard is trying to build India’s maritime reach.

Mazagon: The fortress of defence

Mazagon Dock is the only Indian yard to have built both destroyers and submarines, a feat no India private shipyard can claim.

Its Project 15B destroyers were delivered months ahead of schedule, the stealth frigates under Project 17A are on track and its Scorpene submarine line has already completed delivery of six vessels.

In January 2025, the Indian Navy commissioned three frontline combatants, INS Surat, INS Nilgiri and INS Vaghsheer, all built at Mazagon. It was a display of India’s growing defence self-reliance and Mazagon Dock was its symbol.

This is visible in the numbers.

FY25 revenues touched Rs 11,432 crore up 21%, operating margins hovered near 18% and the order book crossed Rs 32,260 crore.

But there are limitations, too.

Mazagon Dock is almost entirely a defence story. Its fortunes rise and fall with the Navy’s procurement cycle and the government’s pace of approvals. Every ship is high-tech, high-value and high-dependency. For investors, that is a moat but also a ceiling.

Cochin: The challenger from the south

Over the last few years, Cochin has transformed from a PSU that executed fixed orders from the Ministry of Shipping into a commercially savvy, diversified shipbuilder.

FY25 was its breakout year. Revenue rose 26% to Rs 4,820 crore, profit after tax hit a record Rs 827 crore. Operating margins came in at 19%.

Unlike Mazagon, which depends on one big client, Cochin is diversifying across defence, commercial, exports and ship repair.

This shift is visible in its order book mix.

It’s Rs 21,100 crore order book (as on June 2025) includes tugs, hybrid electric ferries, European commercial vessels and offshore wind farm service ships. The company has just completed two large capex projects, the International Ship Repair Facility and a new Dry Dock, both capable of handling large naval and commercial ships.

The green push is its wild card. Cochin has already delivered India’s first hydrogen fuel-cell boat, several electric hybrid catamarans and is developing autonomous vessels through its “C-SAS” (Strategic & Advanced Solutions) arm.

Additionally, it is also partnering with HD Korea Shipbuilding and Drydocks World UAE, giving it access to global design and repair markets, something no other Indian shipyard has pulled off yet.

Margins, models and mindsets

Cochin and Mazagon are both profitable, both debt-free, and both public-sector giants. Yet the way they earn their profits and how that flows through the balance sheet couldn’t be more different.

Mazagon’s contracts are mostly cost-plus, with milestone payments from the Navy funding much of the work upfront. Now this makes earnings a lot more predictable and its capital surprisingly light. Even with fixed margins, returns stay high because very little shareholder money is actually tied up in projects.

Cochin’s model is more market-linked. It builds to order for defence, commercial and export clients, where payments often come later. That means more working capital, slower cash turns and a larger equity base sitting idle in the form of cash and reserves. Its ship repair arm provides steady cash flows, but it doesn’t move the needle on efficiency the way Navy advances do for Mazagon.

The result is visible in the numbers. Mazagon’s Retun on Equity (ROE) hovers near 34%, roughly double Cochin’s 15%, even though their margins aren’t worlds apart. Mazagon runs on the Navy’s money; Cochin runs on its own.

The diverging futures

For the next few years, Mazagon Dock’s path looks steady.

With an order book of around Rs 32,260 crore as on March 31^st, 2025, the company already has multi-year revenue visibility.

The proposed Project P-75I, India’s next-generation submarine program, could add nearly Rs 40,000 crore more, almost doubling the backlog. Its Rs 6,400-crore capacity expansion at Nhava is underway, preparing it to build 11 submarines and 10 warships simultaneously.

Management believes growth will remain stable as execution continues on the Project 17A stealth frigates and other naval contracts.

A major upside could come if the new submarine project is awarded, while offshore work for ONGC and export orders for hybrid vessels offer early signs of diversification, though still small in scale.

The key risk lies in dependence on government approvals and the pace of defence procurement. Even so, Mazagon’s finances remain strong. It is debt-free, delivers a robust Return on Equity above 34% and maintains high cash reserves.

Meanwhile, Cochin Shipyard’s next act looks more dynamic. With the new International Ship Repair Facility (ISRF) operational and foreign tie-ups expanding, management believes revenue will continue to grow with margins in the 25–28% range.

The big bet is on ship repair, which could double in scale over the next three years, supported by exports and the company’s early lead in green marine technologies such as hydrogen-powered and hybrid vessels.

Risks persist. Investors must watch how quickly these plans translate into numbers. Many orders are still in the design stage and ramp-up at new facilities will take time. Margin pressure could emerge if competition intensifies in commercial shipbuilding.

For now, the balance sheet provides comfort. Cochin is debt-free and generates healthy cash flows, fully capable of funding growth internally. Its RoE is at 15%.

The investor’s dilemma

Mazagon Dock trades and Cochin Shipyard both trade at nearly 55 times earnings, well above their historical medians.

Neither is cheap, but both are profitable and cash-rich.

Mazagon’s appeal lies in predictability; it is practically guaranteed work for years.

Cochin’s attraction is growth, the chance that it might become India’s first globally competitive shipbuilder.

If India’s naval spending continues to rise, Mazagon will keep compounding quietly. But if the country’s Maritime Vision 2047, to make India a global shipbuilding hub, starts to play out, Cochin might be the one with a leg up.

Disclaimer:

Note: We have relied on data from www.Screener.in throughout this article. Only in cases where the data was not available, have we used an alternate, but widely used and accepted source of information. 

The purpose of this article is only to share interesting charts, data points and thought-provoking opinions. It is NOT a recommendation. If you wish to consider an investment, you are strongly advised to consult your advisor. This article is strictly for educative purposes only. 

Manvi Aggarwal has been tracking the stock markets for nearly two decades. She spent about eight years as a financial analyst at a value-style fund, managing money for international investors. That’s where she honed her expertise in deep-dive research, looking beyond the obvious to spot value where others didn’t. Now, she brings that same sharp eye to uncovering overlooked and misunderstood investment opportunities in Indian equities. As a columnist for LiveMint and Equitymaster, she breaks down complex financial trends into actionable insights for investors.

Disclosure: The writer and his dependents do not hold the stocks discussed in this article. The website managers, its employee(s) and contributors/writers/authors of articles have or may have an outstanding buy or sell position or holding in the securities, options on securities or other related investments of issuers and/or companies discussed therein.  The content of the articles and the interpretation of data are solely the personal views of the contributors/ writers/authors.  Investors must make their own investment decisions based on their specific objectives, resources and only after consulting such independent advisors as may be necessary.

source : financialexpress