22 Indian companies broke themselves apart. Three months after the new businesses listed, their combined market value was 36% higher.

That helps explain why some of India’s biggest conglomerates are suddenly reaching for the corporate knife.

Tata Motors separated cars from trucks. Vedanta turned one listed company into five. Siemens carved out its energy business. ITC separated hotels.

The pitch is always similar: the pieces could be worth more than the whole.

But does that actually happen – or is “value unlocking” just corporate jargon?

1. Why ₹100 + ₹100 Can Sometimes Be Worth Less Than ₹200

The main reason is something called conglomerate discount.

When one company runs many different businesses, the market often pays less for the whole group than it would for each business on its own. This gap is typically 15–30%.

Why does the discount happen?

• It is hard to value. An investor must judge a car maker, a miner and an oil producer inside one share price.
• Cash gets shared. Profits from a strong business can end up funding a weak one, and outsiders can’t see how those choices are made.
• You can’t pick. If you only want the aluminium business, you must also buy everything else.
• Different businesses need different things. A cash-rich truck business and a heavy-spending car and EV business don’t have the same needs.

Vedanta’s chairman, Anil Agarwal, has said each new company can grow to the size of today’s parent. That is the hope behind every split: when each business stands on its own, each is easier to see, fund and run.

2. A Demerger Creates Zero Rupees on Day One

Suppose you own shares in a company worth ₹1 lakh. It splits into two companies.

The morning after the split, you have not become richer. You simply own two pieces instead of one, and together they are still worth about ₹1 lakh.

Value is created only afterwards, and only in two ways. Either investors come to value the separate businesses more highly than they valued the combined one, or independence helps each business grow its profits faster.

Tata Motors shows both halves of that sentence: a share worth ₹661 before the split became two shares worth ₹732 together on listing day, and ₹660 together a year later, almost exactly where it began.

So where can a higher valuation come from, and why does it sometimes stick?

• Simpler pricing. Each business is assessed individually.
• Sharper focus. Each has its own management, targets and spending plans.
• The right investors. A miner can attract metal-focused funds. A truck maker can attract auto-cycle funds.
• Its own funding. Each company can borrow or raise money against its own strength.

But here is the catch. A demerger does not change what the businesses earn. It only changes how they are run and how the market prices them. Whether that helps depends on the businesses themselves.

3. So We Checked: Did Recent Indian Demergers Actually Create Wealth?

What the History tells us

We asked one question of six well-known demergers: if you held one parent share before the split, what were all your pieces worth together a year after listing? Tata Motors, HUL and Vedanta haven’t reached a year, so we used their latest price.

Two came out ahead: Siemens (+54%) and Reliance (+29%). Tata Motors ended flat. Vedanta (−12%), HUL (−30%) and ITC (−30%) fell. Vedanta shows the journey behind those numbers.

The Vedanta shareholder’s year

Say you held one Vedanta share in April 2026, worth ₹774. After the split, it became five: Vedanta Ltd plus Aluminium, Oil & Gas, Power, and Iron & Steel. On listing day they added up to about ₹897, roughly 16% more. It felt like a win.

Four and a half months later, the five were worth about ₹682, the −12% in the chart. Aluminium, the biggest new piece, fell the most.

Tata Motors also gave back its listing-day gain, and ITC and HUL, already behind on listing day, fell further. We can’t blame the split alone, since metal prices, interest rates and company results also move shares.

But a listing-day jump told us little about where these shares would end up. A split shows what each business is worth. It doesn’t make any of them worth more.

4. What This Means for Investors

Is the era of the business empire ending? Not quite. Groups like Tata and Reliance still own many businesses, and Reliance listed part of Jio Platforms this week to show it can raise money from a single piece when it wants to. What is ending is the idea that being big is enough. Markets now want to see each business earn its place.

So if you hold a company that has just split, or is about to, here is what to look at before you celebrate.

The 3 Numbers to Check Before Celebrating a Demerger

1. What debt does each company inherit?
Borrowings get divided too, and rarely evenly. One company may start debt-free while another carries most of the loans. The demerger scheme document shows who gets what.

2. Where does the cash flow go after the split?
Inside a group, a cash-rich business can fund a cash-hungry one. After the split, that stops. At Tata Motors, trucks generate cash; cars and EVs need it.

3. What is the combined value compared with what you paid?
Add up all the pieces and compare them with your original purchase, as in Section 3. Your purchase cost is also split across the new shares in a ratio the company notifies, and that decides your tax when you sell.

And one thing that is not a number: your concentration.
One holding can quietly turn into five, and your exposure to one sector can grow without a single purchase. This is easy to miss if you also hold these stocks through mutual funds.

Whether to hold, trim or add depends on your goals, your time horizon and what else you own. That is a conversation, not a newsletter headline.

Hold Tata Motors, Vedanta or Reliance, directly or through your mutual funds? Our SEBI-registered advisors can map your exposure across the new companies and check whether your portfolio is balanced.