** Strong debut from The Trade Desk, an onlineadvertising platform, keeps recent IPO momentum rolling
** Stock opens 60 pct above issue and climbs to $29.47 high,valuing co at about $1.1 bln
** Offers 4.7 mln shares at $18, top of upwardly revisedrange
** Bookrunners say deal was 20x subscribed with 300institutional orders. Top 10 accounts were allocated half theoffering's shares, and top 25 took down 75 pct; two-thirds ofaccounts were blanked
** At end of 2015, Trade Desk had 389 clients, primarilyadvertising agencies, with Omnicom Group and WPP PLC each representing over 10 pct of gross billings
** Co raised $60 mln in a Feb private round that includedparticipation from funds advised by Wellington Management (11.5pct pre-IPO stake)
** Trade Desk's successful listing comes amid a revival oftech IPOs; safety communications co Everbridge Inc delivered strong returns after its IPO last week
** Though 2016 deal flow down slightly more than half yr/yr,IPO activity continues to ramp; 6 offerings still scheduled thisweek, including Valvoline ($645 mln) and Swiss biotech AC Immune ($55 mln)
** And enterprise software firm Nutanix Inc appearsto be marquee name among 4 co's on next week's docket