Indian newspaper Times of India reported on Wednesday, citing sources, that Nestlé is close to buying Horlicks and other GSK consumer healthcare assets but will not merge the business with its own local unit, Nestlé India Ltd.
A spokeswoman for GSK India told Reuters on Wednesday that the company is conducting a strategic review of its nutrition brands in India and expects to conclude the process by 2018.
If either of these two companies win the auction, that would mean they beat out Coca-Cola, another likely suitor who has been looking to expand in emerging markets as growth in the United States slows.
Coke was shortlisted to join the final round of the auction, which began in September, but its interest cooled, FT reported, citing one person familiar with the sales process.
The $4 billion valuation is considered too steep by some analysts as the Indian market for so-called health drinks - mostly dietary supplements or flavour enhancers typically drunk with milk - is seeing a sharp slowdown in growth.
Horlicks is still very popular and comfortably dominates the health-drinks market in India, but urban Indian consumers are increasingly turning to healthier, less-sugary alternatives and natural products.
Last month Kraft Heinz agreed to sell its popular health-drink brands Complan and Glucon-D, along with a couple of other brands and factories, to Indian pharma and consumer company Zydus Wellness Ltd for 45.95 billion rupees ($648.6 million).
A spokesman for Nestle India told Reuters on Wednesday that the company would not comment on speculation. A spokeswoman for Unilever said the company would get back on the Reuters query seeking comment about the media articles.