In its debut session, Tenneco Clean Air India Ltd. outpaced even the bluest of blue chips, topping the NSE’s turnover chart with trades worth ₹5,101 crore. The US-based Tenneco Group–backed auto components maker surged as much as 30.2% in intra-day trade from its IPO price of ₹397 after raising ₹3,600 crore through the three-day bidding process.
Close behind was Billionbrains Garage Ventures, the parent of discount broker Groww, which logged ₹2,522 crore in trades. Shares of the trading platform, which had rocketed nearly 90% in five sessions, hit its first lower circuit on Wednesday, trimming activity and pulling its average turnover since listing down to ₹6,100 crore.Ed-tech firm Physicswallah rounded out the trio, generating ₹2,369 crore in turnover as 16 crore shares changed hands. This marked a cooldown from its stunning debut-day turnover of ₹4,124 crore, with the stock ending 7.7% lower at ₹143.28.
Interestingly, while Tenneco held onto its debut gains, both Groww and Physicswallah ended the day in the red, signaling early profit-booking after a strong listing day performance.

