When the business press reports that one company has “merged” with another, the word does a lot of hiding. A telecom operator absorbing a rival, a foreign bank buying a controlling stake in an Indian lender, a holding company folding its wholly-owned subsidiary into itself: these are all called mergers in everyday speech, yet each is a legally distinct transaction with its own approvals, timeline, and tax bill. Understanding the types of mergers and acquisitions is the difference between a deal that closes cleanly and one that stalls before the National Company Law Tribunal (NCLT) for eighteen months.
Here’s the thing. Lawyers and deal-makers classify mergers along two very different axes, and confusing them is where a lot of first-year associates go wrong. One axis asks why two businesses are combining: the economic logic. The other asks how the combination is executed in law: the structure. A horizontal merger (the economic answer) can be carried out through a scheme of arrangement, a share purchase, or a slump sale (the structural answers). Get the two lenses straight and the rest of M&A starts to make sense.
This piece walks through both. First the economic categories every textbook lists, with current Indian examples. Then the structural categories that actually appear in the documents, mapped to the sections of the Companies Act, 2013 and the regulators who clear them. By the end you’ll know not just what a conglomerate merger is, but why a buyer would choose a slump sale over a share deal, and which structure triggers an open offer under SEBI’s takeover code.
Quick definition: Mergers and acquisitions are classified two ways. By economic rationale, they are horizontal (same industry), vertical (different stages of one supply chain), conglomerate (unrelated businesses), or extension mergers. By legal structure under Indian law, they take the form of a scheme of arrangement, a fast-track merger, a cross-border merger, a share or asset acquisition, or a takeover.
Merger, acquisition, amalgamation: what’s actually different
Before the categories, the vocabulary. These three words get used interchangeably, and they shouldn’t be.
A merger is the combination of two or more companies into one. In an amalgamation, two or more companies combine and a fresh or surviving entity holds the assets and liabilities of all of them: the term is used in Indian tax law and in the Companies Act tradition inherited from the 1956 statute. An acquisition (or takeover) is different in a way that matters: one company gains control of another, but both can keep their separate legal existence. Buy 51% of a target’s shares and you’ve acquired it; the target still files its own returns the next morning.
The working test senior counsel use is simple. Ask who survives. In a merger or amalgamation, at least one company ceases to exist as a separate entity. In an acquisition, nobody necessarily disappears: control changes hands, the corporate shell stays alive. That single question sorts most confusion. For a fuller treatment of the framework, our complete guide to mergers and acquisitions in India covers the governing statutes and the deal process end to end.
Types of mergers by economic rationale
This is the classification most people mean when they ask about “types of mergers.” It groups deals by the commercial relationship between the two businesses. Why does it matter beyond the textbook? Because the Competition Commission of India (CCI) cares a great deal about whether a combination is horizontal: that’s where competition concerns concentrate.
Horizontal merger
A horizontal merger joins two companies that do the same thing, at the same level of the market. Same products, same customers, often the same suppliers. The commercial logic is scale: combined buying power, a wider footprint, lower per-unit cost, and fewer competitors.
India has plenty of these. The 2018 combination of Vodafone India and Idea Cellular created the country’s then-largest telecom operator, two rivals becoming one. The merger of PVR and INOX Leisure, approved by the NCLT and completed in 2023, brought together the two biggest multiplex chains in the country. And the 2019 amalgamation of Bank of Baroda with Vijaya Bank and Dena Bank was a horizontal consolidation engineered by the government to build a stronger public-sector lender.
The catch with horizontal mergers? They draw the closest regulatory scrutiny. Because the merging parties were competitors, the deal can reduce competition in a market, which is exactly what the Competition Act, 2002 is built to police. Large horizontal combinations almost always need CCI clearance, and the CCI can demand structural remedies (selling off overlapping brands or outlets) before it approves.
Vertical merger
A vertical merger combines two companies at different stages of the same production or distribution chain. Think of a manufacturer merging with its raw-material supplier, or a producer absorbing its distributor. The buyer isn’t acquiring a competitor: it’s acquiring a step in its own value chain.
The appeal is control and margin. A car maker that buys its key components supplier secures its inputs, captures the supplier’s profit margin, and stops depending on an outside vendor for a critical part. A film studio that acquires a distribution network controls how its content reaches audiences. In practice, though, pure vertical mergers make fewer headlines in India than horizontal and conglomerate ones: a lot of vertical integration here happens through organic expansion or subsidiary structures rather than a single landmark merger.
From a competition standpoint, vertical deals are usually treated more leniently than horizontal ones, because the parties weren’t competing in the first place. That said, the CCI does examine whether a vertical merger lets the combined entity squeeze out rivals by, for instance, denying them access to an essential input. So “vertical, therefore safe” is not a rule you can bank on.
Conglomerate merger
A conglomerate merger joins two companies in unrelated businesses. No shared products, no shared supply chain, no obvious commercial overlap. The driver is diversification: spreading risk across sectors so that a downturn in one doesn’t sink the group.
Indian business houses have a long conglomerate tradition, which is why these deals feel familiar. When Reliance Brands acquired the toy retailer Hamleys in 2019, an oil-to-telecom group added a children’s-toys business that had nothing to do with its existing operations: a textbook conglomerate move. The broader Tata, Aditya Birla, and Adani groups all grew partly by acquiring across unrelated sectors.
Conglomerate mergers tend to clear competition review with the least friction, precisely because the businesses don’t compete and don’t sit in the same supply chain. The real risk here isn’t regulatory: it’s managerial. Running a toy retailer and a refinery demand different instincts, and the history of conglomerates is littered with diversifications that looked clever on a slide and bled cash in practice.
Market-extension and product-extension mergers
Two narrower categories round out the economic picture. A market-extension merger joins companies that sell the same product in different geographic markets: a brand strong in the south merging with one strong in the north to go national overnight. A product-extension merger joins companies that sell related but non-competing products to the same customers, letting each cross-sell into the other’s base.
Both sit somewhere between horizontal and conglomerate on the spectrum. They share something (a product or a customer base) without being direct competitors. You’ll see the labels more in business-school case studies than in NCLT orders, but they’re useful shorthand when a deal doesn’t fit cleanly into the big three.
Reverse merger
A reverse merger flips the usual direction: a private (often larger or stronger) company merges into a smaller listed company, and the private company’s owners end up controlling the listed entity. The point is usually to go public without the cost and disclosure burden of a fresh initial public offering, by stepping into an already-listed shell.
The classic Indian example is the 2002 merger of ICICI Limited, the parent financial institution, into its own subsidiary ICICI Bank: the parent merged into the child, an unusual direction that gave the group a single listed banking entity. The 2023 merger of HDFC Limited into HDFC Bank followed broadly similar logic on a much larger scale, folding the housing-finance parent into its listed banking subsidiary. Reverse mergers are legitimate and common, but SEBI watches listed-shell transactions closely to make sure they aren’t a backdoor route to dodge listing norms.
Types of mergers and acquisitions by legal structure
Now the other axis: the one that shows up in the transaction documents. Two companies might both want a “horizontal merger,” but how they execute it determines the approvals, the timeline, and who has to sign off. Indian law offers several routes, and choosing among them is the heart of deal structuring.
Scheme of arrangement (Sections 230 to 232)
This is the workhorse. A scheme of arrangement under Sections 230 to 232 of the Companies Act, 2013 is the court-supervised route for a true merger or amalgamation, where one company’s assets and liabilities transfer to another by operation of law and the transferor dissolves without winding up.
The process runs through the NCLT. The companies file the scheme, the tribunal usually orders meetings of shareholders and creditors, the scheme needs approval by a majority representing three-fourths in value of each class present and voting, and the NCLT then sanctions it after hearing objections and inputs from regulators. The Supreme Court’s four-point test in Miheer H. Mafatlal v. Mafatlal Industries Ltd., (1997) 1 SCC 579 still frames how a tribunal decides whether to sanction a scheme: statutory compliance, fairness to each class, conformity with law and public interest, and commercial wisdom left to those who voted. It’s thorough, it’s binding on dissenters, and it takes time.
Fast-track merger (Section 233)
Section 233 of the Companies Act, 2013 offers a lighter route that skips the NCLT entirely. A fast-track merger is approved by the Regional Director (through the Central Government) rather than the tribunal, which cuts months off the timeline. It was originally limited to mergers between two or more small companies and between a holding company and its wholly-owned subsidiary.
That gate has widened. The Ministry of Corporate Affairs amended the rules in September 2025 (the Companies (Compromises, Arrangements and Amalgamations) Amendment Rules, 2025, notified through G.S.R. 603(E)) to bring more classes of companies into the fast-track lane, including certain unlisted companies subject to a borrowing limit and additional intra-group combinations, with the process running on the revised Form CAA-10A and related filings. The exact eligibility conditions sit in the amended rules, so confirm the current thresholds against the MCA notification before you assume a deal qualifies. Our legal due diligence checklist for M&A flags where structure choice changes the documents you’ll need to review.
Cross-border merger (Section 234)
When one of the companies is foreign, Section 234 of the Companies Act, 2013 governs the combination, read together with the Foreign Exchange Management Act, 1999 and the FEMA (Cross-Border Merger) Regulations, 2018. A cross-border merger can be inbound (a foreign company merging into an Indian one) or outbound (an Indian company merging into a foreign one).
The structure layers exchange-control compliance on top of company-law approval. Pricing has to satisfy FEMA’s valuation norms, the resulting shareholding has to fit the sectoral foreign-investment caps, and reporting flows through the Reserve Bank of India’s machinery. Outbound mergers, in particular, are only permitted into companies in jurisdictions the rules specify, which narrows the field considerably. This is the structure behind a lot of the foreign-buyer activity in recent years, and you can see the pattern across the deals in our roundup of the biggest M&A deals in India in 2025 and 2026.
Demerger
Not every “type of merger” combines companies. A demerger does the opposite: it splits one company by transferring a business undertaking into a separate entity, usually so that distinct businesses can be valued and run on their own. It runs through the same Section 230 to 232 scheme machinery, just in reverse, and the Income-tax Act gives a tax-neutral path when the conditions for a qualifying demerger are met. Worth flagging because the word “merger” in a deal announcement sometimes describes a restructuring that is really a demerger followed by a merger of the carved-out piece.
Share acquisition, asset acquisition, and slump sale
On the acquisition side, structure splits three ways, and the choice carries real tax and liability consequences.
In a share acquisition, the buyer purchases the target’s shares and inherits the company whole: every asset, every liability, every contract, including the ones nobody mentioned in due diligence. It’s clean to execute but unforgiving on hidden liabilities. In an asset acquisition, the buyer cherry-picks specific assets and leaves unwanted liabilities behind with the seller, which is safer for the buyer but messier, because each asset and contract may need separate transfer and consent.
A slump sale sits in between: the transfer of an entire business undertaking as a going concern for a lump-sum price, without assigning values to individual assets. It’s defined and taxed as its own category under the Income-tax Act (long handled through the slump-sale provisions and the special capital-gains computation for such transfers), and it’s a favourite for hiving off one division without a full court-driven scheme. The new Income-tax Act, 2025, which comes into force on 1 April 2026, carries the slump-sale concept forward, though you’ll want to map the renumbered sections against the official text rather than the old numbering.
Takeover under the SEBI Takeover Code: friendly and hostile
When the target is a listed company, acquisitions run into the SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011, known as the Takeover Code. Cross the 25% voting-rights threshold and the acquirer must make a mandatory open offer to public shareholders for at least a further 26% of the company, at a price set by the regulations. Between 25% and 75%, acquirers can creep up by no more than 5% of voting rights in a financial year without triggering a fresh offer.
This is also where the friendly-versus-hostile distinction lives. A friendly takeover has the target board’s blessing; the deal is negotiated and recommended to shareholders. A hostile takeover bypasses the board and goes straight to shareholders through the open-offer route. Hostile takeovers are rare in India: concentrated promoter holdings, the cost of an open offer, and SEBI’s procedural guardrails make them hard to pull off, though they are not impossible. So is a hostile takeover legal here? Yes, within the Takeover Code’s framework. Common? Not really.
Deal structures at a glance
The table below maps the main structural choices to their legal basis and the practical levers (approvals, tax, liability) that usually decide which one a deal uses.
| Structure | Legal basis | Approving authority | Typical use |
|---|---|---|---|
| Scheme of arrangement | Companies Act, 2013, ss. 230 to 232 | NCLT | True merger or amalgamation; binds dissenters |
| Fast-track merger | Companies Act, 2013, s. 233 (2025 rules) | Regional Director / Central Government | Small companies, holding-subsidiary, eligible groups |
| Cross-border merger | s. 234 + FEMA Cross-Border Merger Regs, 2018 | NCLT + RBI / FEMA route | Inbound or outbound deals with a foreign party |
| Share acquisition | Share purchase agreement; SEBI SAST if listed | Parties / SEBI (listed targets) | Buying control; inherits all liabilities |
| Asset sale / slump sale | Business transfer agreement; Income-tax Act | Parties (board / shareholder consent) | Carving out a division; leaving liabilities behind |
| Takeover (open offer) | SEBI (SAST) Regulations, 2011 | SEBI | Acquiring a listed company past the 25% trigger |
Why the type of merger changes everything
Classification isn’t an academic exercise. The type of merger you pick, on both axes, decides three things that make or break a deal.
First, competition clearance. A horizontal merger between large players almost certainly needs CCI approval, and the analysis is far more searching than for a conglomerate deal. Under the Competition Act, 2002, a combination that crosses the prescribed asset or turnover thresholds, or the deal-value threshold of Rs. 2,000 crore introduced for transactions with substantial business operations in India, must be notified to the CCI before completion. Close a notifiable horizontal deal without clearance (“gun-jumping”) and the penalty can be steep.
Second, tax. A merger structured as a qualifying amalgamation can be tax-neutral, with capital-gains relief and the ability to carry forward the transferor’s accumulated losses where the Income-tax Act’s conditions are met. A slump sale is taxed under its own special head. A plain asset sale can attract tax on each asset transferred. The structure, not the headline, determines the bill, and a poorly chosen route can add crores in avoidable tax.
Third, liability and timeline. A scheme of arrangement binds every dissenting shareholder and creditor but runs through the NCLT and can take a year or more. A fast-track merger trades some flexibility for speed. A share deal is quick but swallows hidden liabilities whole, while an asset deal lets the buyer leave the skeletons with the seller. The right answer depends on what the buyer is most afraid of: time, tax, or what’s lurking in the target’s past.
Conclusion
“Types of mergers” is really two questions wearing one label. The economic categories (horizontal, vertical, conglomerate, and the extension and reverse variants) tell you why two businesses are combining and where the competition risk sits. The structural categories (scheme of arrangement, fast-track merger, cross-border merger, share or asset acquisition, slump sale, and takeover) tell you how the combination gets done and who has to approve it. Strong deal work means holding both lenses at once: knowing that a horizontal merger of two listed rivals will draw CCI scrutiny and trigger the Takeover Code, and choosing the structure that delivers the commercial goal at the lowest cost in tax, time, and risk.
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Frequently asked questions
What are the main types of mergers?
By economic rationale, the main types are horizontal (two companies in the same industry), vertical (companies at different stages of one supply chain), and conglomerate (companies in unrelated businesses). Market-extension, product-extension, and reverse mergers are further variants.
What is the difference between horizontal, vertical, and conglomerate mergers?
A horizontal merger joins direct competitors in the same market. A vertical merger joins a company with its supplier or distributor along the same value chain. A conglomerate merger joins two companies in unrelated businesses, mainly to diversify risk.
What is the difference between a merger and an acquisition?
In a merger, two or more companies combine and at least one ceases to exist as a separate entity. In an acquisition, one company takes control of another (usually by buying its shares), but the target can keep its separate legal existence.
What is a scheme of arrangement?
It is the court-supervised route for a merger or amalgamation under Sections 230 to 232 of the Companies Act, 2013. It requires approval by the prescribed majority of shareholders and creditors and sanction by the National Company Law Tribunal, and it binds dissenters.
What is a fast-track merger under Section 233?
It is a simplified merger approved by the Regional Director instead of the NCLT, available to small companies, holding-and-wholly-owned-subsidiary combinations, and (after the September 2025 amendment) additional classes of companies subject to the conditions in the amended rules.
Is a hostile takeover legal in India?
Yes, within the framework of the SEBI (SAST) Regulations, 2011. A hostile acquirer can make an open offer directly to public shareholders. In practice, hostile takeovers are rare because of concentrated promoter holdings and the cost of a mandatory open offer.
What is the difference between a slump sale and an asset sale?
A slump sale transfers an entire business undertaking as a going concern for a single lump-sum price, without valuing individual assets, and is taxed as its own category. An asset sale transfers specific assets with values assigned to each, and is taxed asset by asset.
References
- Companies Act, 2013, Sections 230 to 234 (schemes of arrangement, fast-track merger, cross-border merger).
- Companies (Compromises, Arrangements and Amalgamations) Amendment Rules, 2025, G.S.R. 603(E), notified September 2025.
- SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011.
- Competition Act, 2002 (as amended by the Competition (Amendment) Act, 2023) and the CCI Combinations Regulations, 2024.
- Foreign Exchange Management Act, 1999 and the FEMA (Cross-Border Merger) Regulations, 2018.
- Income-tax Act provisions on amalgamation, demerger, and slump sale; the Income-tax Act, 2025 (in force 1 April 2026).
- Miheer H. Mafatlal v. Mafatlal Industries Ltd., (1997) 1 SCC 579.
- Hindustan Lever Employees’ Union v. Hindustan Lever Ltd., 1995 Supp (1) SCC 499.
Disclaimer: This article is for informational and educational purposes only and does not constitute legal advice. The law on mergers, acquisitions, and their tax treatment changes through amendment and judicial interpretation, and specific deals turn on their own facts. Readers should consult a qualified company-law or M&A practitioner before acting on any transaction.
