New Delhi, Aug. 28 -- Investors who received an allotment in the Tempsens Instruments IPO have reason to rejoice, as the stock made a stellar debut on Dalal Street, exceeding expectations based on its grey market premium and emerging as one of the biggest mainboard listings of 2026.

Tempsens Instruments shares debuted at Rs.634 apiece on the NSE, marking a 111% premium over the issue price of Rs.300. The stock maintained its strong momentum for most of the session before finally closing at Rs.586.65, still representing a 95.55% premium to the issue price.

The listing price also exceeded expectations implied by the grey market premium, which had indicated a potential listing price of Rs.607, based on a GMP of Rs.307 over the issue price....