Bumper stock market listing for Clean Science and Technology. Check details Bumper stock market listing for Clean Science and Technology. Check details Clean Science and Technology had a bumper listing on the stock market on Monday after a successful initial public offering. Here is all you need to know. advertisement UPDATED: July 19, 2021 11:33 IST At 11:15 am, shares of Clean Science and Technology were trading at Rs 1,600 on the BSE and Rs 1,599.75 on the NSE. (Photo: Reuters/Representational image) Speciality chemicals firm Clean Science and Technology made a bumper debut on the stock market on Monday. The company’s share price opened with a nearly 100 per cent premium on its issue price of Rs 900, marking a strong listing after its initial public offering (IPO).