The death of Indian billionaire Rakesh Jhunjhunwala has brought the famed investor’s nearly $4 billion worth of shares into the spotlight and his dealings have come under scrutiny.

The man known as India’s Warren Buffett died of cardiac arrest on Sunday at the age of 62. The self-made trader has invested in many established businesses and startups and serves on the boards of several Indian companies.

Jhunjhunwala is one of the most influential market voices in Asia’s third-largest economy, with a large following among the country’s growing number of retail investors. This man, also known as “The Big Bull,” is a staunch proponent of India’s growth story.

Jewellery retailer Titan Co is one of the veteran traders, and his wife Rekha Jhunjhunwala’s biggest and most profitable investment makes up more than a third of his portfolio, according to data compiled by Bloomberg. Their other largest holdings by market value include Star Health & Allied Insurance Co, footwear maker Metro Brands Ltd and car maker Tata Motors Ltd Jhunjhunwala holds Star Health, IT firm Aptech Ltd and video game maker Nazara Technologies Ltd more than 10% of the shares.

Even Prime Minister Narendra Modi has acknowledged Jhunjhunwala’s impact on the investment community. Modi tweeted on Sunday that the “unrelenting” investor had “made an indelible contribution to the financial world.”