Rubrik Inc., a cloud and data security startup backed by Microsoft Corp., filed for an initial public offering, disclosing growing revenue and losses.The offering is being led by Goldman Sachs Group Inc., Barclays Plc, Citigroup Inc. and Wells Fargo & Co., according to Monday’s filing with the US Securities and Exchange Commission, confirming a Bloomberg News report. The company plans to list its shares on the New York Stock Exchange under the symbol RBRK....