SEBI issued its observations on the IPO papers of Ratnadeep Retail on October 27, Punjab Carbonic on October 29, and Atomberg Technologies and GNI Infrastructure on October 30. You are using an outdated browser. Please upgrade your browser to improve your experience and security. Atomberg Technologies has received approval from SEBI for its IPO, which includes a fresh issue of Rs 450 crore and an offer for sale of 7.65 crore shares.