Ibotta, the digital marketing company backed by Walmart, said on Tuesday it was looking to raise about $551 million in an upsized initial public offering in the United States. The company and some of its existing shareholders plan to sell a combined 6.56 million shares, nearly one million more than its previous offering after some selling investors decided to offer more stock. The company is seeking a valuation of $2.55 billion and sell 2.5 million shares and the stock offering is expected to be... Read this story