India's top 25 family business houses control up to a fifth of national GDP, World Bank study finds

By Rajiv Shah  

A new research has revealed that despite decades of liberalization, India's corporate dynasties have only tightened their grip on the economy—capturing 20% of GDP at their peak and expanding into nearly every industrial sector while quietly driving up prices.

At their zenith in 2012, the gross revenues of India's top 25 family business houses equaled one-fifth of the entire country's GDP. Even after a partial retreat, their collective share remained above 15%—nearly triple their footprint at the turn of the millennium. Just five conglomerates—Adani, Birla, Jindal, Reliance, and Tata—accounted for 12% of India's GDP at the 2012 peak, and now command over 60% of the top 25's combined revenues.

These are the findings of the study published in the World Bank Economic Review. Authored by Simon Commander (Altura Partners and IZA), Saul Estrin (London School of Economics and IZA), Naveen Thomas (O.P. Jindal Global University), and Varun Lingineni (LSE), the study draws on disaggregated data to track how India's corporate dynasties have evolved since economic liberalization.

Falling Concentration, Rising Clout

Drawing on data from 2000 to 2020, the study observes a striking paradox. On paper, market concentration has declined. The Hirschman-Herfindahl Index (HHI)—a standard measure of industry concentration—has fell sharply across Indian industries since 2000, from 0.123 to 0.037 in 2020. The share of revenues controlled by the top five firms in a given industry (CR5) dropped from 47.8% to 31.7%.

But the authors caution against reading this as a triumph of competitive markets. Much of the decline was driven not by vibrant private-sector entry but by the policy-induced shrinking of the state sector. 

"Although our evidence strongly points to a fall in concentration, there is no doubt that business groups—and particularly FBGs or Family Business Groups—retain a powerful position in the aggregate economy," the authors write. Several of the largest groups dominating the economy in the late 1950s remain the largest today, underscoring a remarkable persistence of dynastic wealth across generations.

The Diversification Engine

The study's most striking finding is the speed and scale at which India's leading family business groups have diversified—effectively spreading their wealth and influence across the entire economic landscape. In 2000, the average top-25 family business group operated in 13 specific product and service lines (for example, steel manufacturing, retail banking, or textile production). By 2010, that number had nearly doubled to 25, and by 2020 it stood at 26. The total number of distinct business lines populated by the top 25 groups jumped from 332 in 2000 to 664 in 2020.

The Adani Group, operating in just 5 specific business lines in 2000, had expanded into 38 by 2020—a 750% increase. Reliance grew its footprint nearly fourfold, from 17 to 63. Even venerable incumbents like the Tata and Birla groups deepened their already sprawling portfolios, with Tata moving from 43 business lines to 69 and Birla from 44 to 65.

Critically, the authors find that this diversification has been overwhelmingly across entirely different broad industries rather than within the same general sector. On average, 88–90% of the top groups' expansion into new specific business lines crossed over into completely unrelated major industries—such as a company moving from steel into pharmaceuticals, or from textiles into telecommunications. 

Indeed, the top groups weren't just deepening their presence within "manufacturing" or "financial services." They were planting flags in entirely unrelated industries—from food processing to electronics to finance—suggesting a strategy of empire-building rather than specializing within a single broad sector. 

Moreover, while the share of highly competitive broad industries rose from 28% to 47% between 2001 and 2020, a stubborn bloc of concentrated markets persisted. In 2020, over 20% of specific product and service categories still had their top five firms controlling more than 75% of revenues, and the largest five firms controlled more than half of revenues in roughly 15% of all business lines. "Most of the sectors that were highly concentrated in 2001 remained so in 2020," the authors note.

Significantly, the study highlight the role of government policy in sustaining these groups: tariff protection, preferential access to finance, and the overt designation of certain conglomerates as "national champions" have all helped entrench incumbents.

A Warning for Emerging Markets

Meanwhile, the authors reveal that India's family business groups have been quietly padding their prices. Between 2000 and 2013, the gap between what these groups charged and what it cost them to produce was relatively flat. But after 2013, that gap "rose quite sharply." The authors found a strong statistical link: the more concentrated a specific product market was, the higher the markup. 

They believe that their findings are relevant well beyond India. Family business groups are a defining feature of capitalism across Asia and Latin America, and the Indian case illustrates how liberalization can reshape the form of market power without necessarily diminishing its extent. As groups diversify across sectors rather than dominating any single one, they may escape traditional antitrust scrutiny while still extracting rents, deterring entry, and capturing an outsized share of national income.

"Indian family-owned business groups are entrenching across the economy and exploiting their monopoly power," the authors conclude—a dynamic they describe as "worrying" given the prevalence of this organizational form throughout the developing world.