an instacart worker the company told employees in march that it would cut its valuation citing market turbulence instacart inc’s plans to launch a public offering puts the grocerydelivery company up against this year’s volatile stock market and longerterm questions about how consumers shop for staples san franciscobased instacart said late wednesday that it confidentially filed for an initial public offering less than two months after cutting its valuation by nearly 40 by filing confidentially now instacart is positioning itself to go public as early as september according to people familiar with the offering