AMFI Market-Cap Reclassification Could Change Large-, Mid- and Small-Cap Stock Lists

Key Takeaways:

• Market-capitalisation changes could lead to the reclassification of selected listed companies in AMFI's next stock categorisation exercise. 
• Reports published in early October identified NSE and Siemens Energy India among companies being examined for potential classification changes. 
• The changes remain projections until the relevant AMFI classification is officially published. 

Market-Cap Changes Bring Stock Classification Into Focus 

Potential changes to the market-capitalisation classification of Indian listed companies have attracted attention ahead of the next applicable classification exercise by the Association of Mutual Funds in India (AMFI). 

Reports published during the first week of October 2026 examined companies that could move between the large-cap, mid-cap and small-cap categories. 

NSE and Siemens Energy India were among the companies discussed in reporting on potential changes. 

These Mutual Funds are based on market-capitalisation rankings and should not be treated as confirmed AMFI classification decisions. 

How AMFI Classifies Listed Companies 

AMFI's market-capitalisation framework divides eligible listed companies into three categories based on their full market capitalisation rankings. 

The categorisation is updated periodically using the applicable methodology. 

Changes in market prices, newly listed companies and shifts in relative market capitalisation can alter the rankings. 

A company may therefore move between categories even without a fundamental change in its underlying business operations. 

Why Reclassification Matters for Mutual Funds 

SEBI's mutual fund categorisation rules require certain equity schemes to maintain minimum exposure to stocks belonging to their designated market-cap categories. 

Large-cap funds must invest at least 80% of their assets in equity and equity-related instruments of large-cap companies. 

Mid-cap mutual funds and small-cap funds must each maintain at least 65% exposure to their respective designated categories. 

Changes to the official classification can therefore affect the investment universe available to these schemes. 

However, a stock's movement from one category to another does not automatically require every mutual fund holding that stock to sell or purchase shares immediately. 

Actual portfolio decisions depend on scheme mandates, applicable transition provisions, portfolio positioning and investment management decisions. 

Projected Changes Are Not Official Reclassifications 

Market participants can estimate future classifications using market-capitalisation data, but such calculations remain provisional. 

The final AMFI list may differ because of subsequent market movements, changes in eligible securities or the methodology applied to the relevant review period. 

It is therefore important to distinguish between companies expected to change categories and companies that have officially been reclassified. 

The early-October reports provide a preliminary indication of possible changes to the mutual fund investment universe. The final position will depend on AMFI's official publication.