Blood samples in vials. Photographer: Nathan Laine/Bloomberg BillionToOne Inc., a molecular diagnostics company, raised $273.1 million in an upsized US initial public offering, during a US government shutdown that has complicated the listing process. The Menlo Park, California-based company sold 4.55 million shares for $60 each, according to a statement Wednesday confirming an earlier Bloomberg News report. BillionToOne had marketed 3.85 million shares in a range of $49 to $55 each, according to its fili ...