Types of deals: mergers, tender offers, spin-offs and carve-outs
By SuperdayReps · Michigan Ross Undergrad | Wharton MBA · ex-Citi | ex-Greenhill · Former Head Mentor at a Leading IB Prep Service
11 min read · updated October 14, 2026
"M&A" is one label stretched over very different transactions. Two rivals combining. A manufacturer buying its supplier. A buyer going straight to shareholders over a board's head. A conglomerate handing a division to its own shareholders. Interviewers use the vocabulary to check that you can tell these apart and, more importantly, that you know why a company would pick one over another.
This lesson sorts deals four ways: by how the businesses relate, by legal form, by how the offer reaches shareholders, and by how a company gets rid of a business. It ends with the tax question that comes up when a target has losses on its books. For how a sale process runs, see how M&A deals actually work.
By how the businesses relate
Horizontal
A horizontal deal combines two companies at the same stage of the same industry. Usually that means competitors: two regional banks, two airlines, two packaged food makers.
The rationale is scale. The combined company can cut duplicate headquarters, close overlapping branches or plants, buy inputs more cheaply, and spread fixed costs over more revenue. These are the most believable synergies in M&A, because the buyer already knows the business inside out. The catch is antitrust. Taking a competitor out of the market is exactly what regulators look for, so horizontal deals carry the highest risk of being blocked or forced to sell off overlapping pieces.
Vertical
A vertical deal combines companies at different stages of the same supply chain. A carmaker buys a battery supplier. A streaming service buys a studio. A drug distributor buys pharmacies.
The rationale is control and margin: secure a critical input, stop paying a supplier's profit margin, coordinate planning across the chain. Regulators worry less about lost competition and more about foreclosure, the risk that the combined company cuts rivals off from the input or the customers it now controls.
Conglomerate
A conglomerate deal combines businesses with no meaningful link. The classic argument is diversification: a steadier, less cyclical company. The classic rebuttal, and the one interviewers want, is that shareholders can diversify themselves by owning both stocks, for free, without paying a control premium. That is why conglomerates often trade at a discount to the sum of their parts, and why pure conglomerate deals are rare today.
Between vertical and conglomerate sit adjacent deals: same customers but a different product (a payments company buying a payroll business), or same product in a new geography. Most real deals are horizontal or adjacent.
| Type | Example | Main rationale | Main risk |
|---|---|---|---|
| Horizontal | Two competing airlines | Scale and cost synergies | Antitrust blocks the deal |
| Vertical | Carmaker buys a battery supplier | Control of supply, capture margin | Foreclosure concerns, running an unfamiliar business |
| Conglomerate | Industrial group buys a media company | Diversification | Shareholders could diversify themselves; conglomerate discount |
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Frequently asked
- What is the difference between a horizontal and a vertical merger?
- A horizontal merger combines two companies at the same stage of the same industry, usually competitors, and is driven by scale and cost synergies. A vertical merger combines companies at different stages of the same supply chain, such as a manufacturer buying a supplier, and is driven by control of supply and capturing margin. Horizontal deals draw the most antitrust scrutiny.
- What is the difference between a merger and an acquisition?
- Legally, in a merger two companies combine by statute and one of them ceases to exist, while in an acquisition the buyer purchases the target's shares or assets and the target can survive as a subsidiary. In everyday banking language, merger usually means two companies of similar size combining and acquisition means a larger company buying a smaller one.
- Why would a company do a spin-off instead of selling a division?
- A spin-off hands shares of the division to the parent's own shareholders and is usually tax-free, while a sale raises cash but triggers tax on any gain over the division's tax basis. A company spins off when the division is worth more as its own public company, when the tax bill on a sale would be large, or when no buyer will pay full value.
- Can a buyer use the target's net operating losses after an acquisition?
- Yes, but slowly. In a stock deal the NOLs stay with the target entity, but after an ownership change Section 382 of the tax code caps how much of them can be used each year, at roughly the target's equity value times a published IRS rate. A buyer should value the NOLs at the present value of that capped stream, not at their face amount.
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