facebook may begin its ipo roadshow as early as monday of next week . * may 7 roadshow means stock may debut may 18 -source * zuckerberg to be involved in roadshow -source * regulatory review of facebook ipo near completion -source by alistair barr and alexei oreskovic san francisco , may 1 ( reuters ) - the roadshow for facebook inc 's initial public offering is scheduled to start on monday , meaning the company 's shares should begin trading on may 18 , a source familiar with the process said on tuesday . last week , facebook declined to comment . to be fair , facebook ’s growth had already slowed year - over - year from 154 % to 2010 to 88 % in 2011 . i wrote about facebook in march , citing its accelerating revenues , earnings and membership growth . all costs have increased , with cost of revenues up nearly 300 basis points , and operating income margin dropping from 52 % to 47 % for the full years of 2010 to 2011 . many on wall street had not expected zuckerberg to turn up on the roadshow after he skipped a march analysts ' meeting , ceding the stage to coo sheryl sandberg and cfo david ebersman . but the dow jones reprints : this copy is for your personal , non - commercial use only . the financials reflected the strength of facebook ’s unique position in the world of a destination where people wanted to go every day and provide all the data about themselves that marketers cared to learn .