Atomberg Technologies has received SEBI's approval for its IPO, comprising a Rs 450 crore fresh issue and an offer for sale of 7.65 crore shares, as it looks to fund growth and R&D. The Mumbai-based company filed its draft IPO papers in August. ET had reported in July that Atomberg was preparing for an offering of Rs 1,500-2,000 crore. The final issue size will depend on.