Description

BSE Index Services announces the addition of three companies to multiple BSE indices effective January 6, 2026, following methodology changes.

Summary

BSE Index Services Private Ltd announces the reconstitution of multiple BSE indices effective January 6, 2026. Three companies will be added across various indices: Tata Motors Ltd (Exchange Ticker: 544569), Billionbrains Garage Ventures Ltd (Exchange Ticker: 544603), and Lenskart Solutions Limited (Exchange Ticker: 544600). No companies are being removed from these indices. The changes follow the methodology notice 20251029-21.

Key Points

  • Three companies being added to multiple BSE indices with no deletions
  • Tata Motors Ltd added to BSE Allcap, BSE LargeCap, BSE LargeMidCap, and BSE Industrials
  • Billionbrains Garage Ventures Ltd added to BSE Allcap, BSE LargeCap, BSE LargeMidCap, and BSE Financial Services
  • Lenskart Solutions Limited added to BSE Allcap, BSE LargeCap, BSE LargeMidCap, and BSE Consumer Discretionary
  • Changes based on methodology notice 20251029-21
  • All additions effective at market open on Tuesday, January 6, 2026

Regulatory Changes

No regulatory changes. This is a routine index reconstitution based on previously announced methodology changes from October 29, 2025.

Compliance Requirements

  • Index fund managers and ETF providers tracking these indices must rebalance portfolios to include the new constituents
  • Portfolio managers must execute rebalancing trades effective at the open of January 6, 2026
  • Market participants should update their index composition data and systems
  • Queries can be directed to bseindex@bseindia.com

Important Dates

  • Notice Date: December 23, 2025
  • Effective Date: January 6, 2026 (at market open)
  • Referenced Methodology Notice: 20251029-21 (October 29, 2025)

Impact Assessment

Market Impact: Medium. The addition of three companies to multiple indices will trigger automatic buying by passive funds and ETFs that track these indices. Since no companies are being dropped, this represents net additions to index weights.

Affected Indices:

  • BSE Allcap (all 3 companies)
  • BSE LargeCap (all 3 companies)
  • BSE LargeMidCap (all 3 companies)
  • BSE Industrials (Tata Motors)
  • BSE Financial Services (Billionbrains Garage Ventures)
  • BSE Consumer Discretionary (Lenskart Solutions)

Fund Impact: Index-tracking funds will need to purchase shares of these companies on or before January 6, 2026, potentially creating buying pressure. Asset managers should prepare for rebalancing activities and associated transaction costs.

Investor Consideration: Investors in index funds tracking these BSE indices will gain exposure to these three stocks as part of their portfolio composition.

Impact Justification

Addition of three companies to multiple BSE indices will impact index-tracking funds and portfolios. No companies being dropped. Medium impact due to passive fund rebalancing requirements.