Wealthtech unicorn Groww has filed for an IPO with SEBI under the pre-filing mechanism.The company is eyeing a $7-8 billion valuation with a potential IPO size ranging between $700-920 million.Groww's IPO is expected to be closely watched in the Indian fintech sector where it competes with players like Zerodha and Upstox.SEBI will review Groww's confidential DRHP, and upon approval, a publicly available updated DRHP will be filed with detailed financial disclosures.