What is the Impact of Demerger on Shareholders?

Created on 07 Nov 2019

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Updated on 29 Nov 2023

shareholder thinking of impact of demerger

There are often times when a diversified company opts for focusing on its core businesses and transferring its other business operations to a different company. This is the simple idea behind a popular corporate restructuring activity i.e., Demerger.

In the article,  How is your Purchase Price Divided after a Demerger, we have discussed the advantages of Demerger and what does demerger mean for a shareholder.  Let us now focus on how the stock prices change after the demerger.

On a fundamental note, Demerger refers to the transfer of a company's one or more of its business operations into another company(s). The entity that transfers its business operations is known as "demerged company," and the entity created as a result of the demerger is known as the "resulting company."

What are the different kinds of demergers?

Before moving ahead and demystifying as to what happens to the stock price after a demerger, we must know the types of a demerger. They are:

Types of demergers

Let us understand how the stock prices are impacted in Splits and Spin-offs..


In a spin-off, a company retains a portion of the spun-off identity. Consider ABC, with a market capitalisation of 10,00,000 with 10,000 outstanding shares, which means a share price of 100. Let's say that the company is willing to spin off 50% of its business divisions, which is valued at ₹3,00,000 at an initial share price of ₹30.

Let us now calculate the post spun off the price.

In this scenario



Per Share Price

Market Capitalisation



Less: Business Required for a spin-off



Remaining Value of Business



Add the retained 50% stake in the spun-off division.





Value after spin-off




In a split, the shareholders are given an option to own shares of either parent company or the subsidiary company. In this scenario, the stock price of the company after is calculated as:

Price before the split (original share price) less the initial stock price of the split company.

Suppose ABC traded at ₹100 before the split. However, the initial stock price right after the split is ₹50.  Let us now calculate the post-split price.


Price per share (in ₹)

Original Market Price


Less: Stock Price after a split


Post-Split Price


The Bottom Line

The stock price of a company immediately drops after a demerger. This is because assets which once belonged to the parent company are removed from the parent company's books, which lowers its book value. However, investors should keep in mind that the subsidiary company has enormous potential for growth. However, it is subject to high risks as well.

Make sure to check our article titled: Everything you need to know about Demergers for better and detailed understanding.

Demergers help the company to focus on its core business operations fully and confidently. In any way, demergers create a win-win situation for both investors and the companies.

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Gaurja Newatia

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Gaurja is a Business Economics Student|Finance Enthusiast|Avid reader|

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