The gross proceeds to Upstream from the initial public offering, before deducting underwriting discounts and commissions and offering expenses, are expected to be $255.0 million. Registration statements relating to the shares sold in the initial public offering have been filed with the Securities and Exchange Commission and became effective on October 10,

(Reuters) -Upstream Bio, which is developing treatments for some respiratory disorders, said on Thursday it had raised $255 million in its initial public offering in the United States. The drug developer joins a swath of biotech companies rushing towards a stock market listing as a long-awaited policy easing cycle begins.