Shares of Olaplex Holdings Inc jumped more than 19% in their stock market debut on Thursday, giving the hair products maker a market capitalization of more than $16 billion. Shares of the company, owned by private equity firm Advent International, opened at $25, compared with their initial public offering price of $21 per share. (Reporting by Sohini Podder in Bengaluru; Additional reporting by Praveen Paramasivam; Editing by Amy Caren Daniel)