The Watertown, Massachusetts-based company's shares debuted at $16.50 per share on Nasdaq, below the offer price of $17 apiece.

Instacart said it is now seeking to sell 22 million shares at $28 to $30 each. It was earlier aiming to sell those shares priced between $2...

Traditional U.S. IPOs have raked in more than $5 billion so far in September, according to data from Dealogic, already the second biggest m...