India's largest business houses experienced a year of contrasts in 2025, with some groups creating substantial wealth while others faced significant market value erosion. The performance of the top 10 conglomerates reflected selective market optimism, driven by company-specific factors, sectoral dynamics, and varying investor sentiment across different business segments.

Reliance Industries: Market Value Leader

Reliance Industries emerged as the standout performer among major business houses, delivering the largest absolute gains in market capitalisation. The group's combined market value demonstrated remarkable growth throughout the year.

The gains were primarily driven by Reliance Industries, whose market value jumped more than 29% to over ₹21.2 lakh crore. Investor sentiment improved due to positive developments across multiple business segments. The telecom arm, Reliance Jio, regained momentum after a subdued phase in 2024, with brokerages turning increasingly bullish. Jefferies raised its target enterprise value for Jio to $180 billion, citing strong visibility on revenue and EBITDA growth over the next three years.

The oil-to-chemicals business also surprised positively, with improving Asian refining margins and steady demand for transportation fuels. UBS projected a sharp recovery in O2C earnings by FY27, helping offset weakness in smaller group companies including Network18, Just Dial, and Hathway, all of which posted double-digit declines.

Tata Group: Significant Market Value Decline

The Tata Group faced the most challenging year among India's top conglomerates, experiencing substantial market capitalisation erosion across multiple companies.

The underperformance was broad-based, with two major companies accounting for most of the decline. Tata Consultancy Services, representing a significant portion of the group's total market value, fell around 19% during the year. The decline reflected weak global IT spending, cautious client budgets, and concerns over pricing pressure in the artificial intelligence era.

Tata Motors' passenger vehicle business declined 21% in 2025, with investor confidence affected by a cyberattack that disrupted operations at Jaguar Land Rover. However, the group achieved a positive milestone with the demerger of its commercial vehicles business. The newly listed Tata Motors CV entity gained approximately 28% since listing, with a market capitalisation of around ₹1.5 lakh crore.

Strong Performers: HDFC, Aditya Birla, and Bajaj Groups

Several major business houses delivered solid performance, demonstrating resilience in volatile market conditions.

The HDFC Group's combined market capitalisation rose from approximately ₹15.8 lakh crore to ₹18 lakh crore, benefiting from consistent execution and balance sheet strength. HDB Financial's listing during the year added about ₹63,510 crore to the group's overall market value.

Mixed Results: Adani Group and Others

The Adani Group demonstrated recovery with volatility, adding around ₹1.4 lakh crore in market value. The combined market capitalisation increased from approximately ₹13.2 lakh crore to ₹14.6 lakh crore, though performance varied significantly across companies.

Strong Performers:

• Adani Power: 35%+ gains
• Adani Ports: Nearly 20% growth
• Adani Energy Solutions: Sharp rise

Underperformers:

• Adani Enterprises: Negative returns
• Adani Total Gas: Year-end decline
• AWL Agri Business: Red territory

Other notable performances included Larsen & Toubro group companies adding over ₹1.2 lakh crore, while the Mahindra Group gained approximately ₹1 lakh crore. The JSW Group posted moderate net gains led by JSW Steel and JSW Holdings, despite weakness in JSW Energy and JSW Infrastructure.

Market Outlook

The varied performance across India's top conglomerates highlighted the importance of company-specific execution and sectoral positioning. While some groups benefited from favorable business cycles and strategic initiatives, others faced headwinds from global economic conditions and operational challenges. The results underscored the selective nature of market optimism in 2025, with investors favoring companies demonstrating strong fundamentals and clear growth visibility.