** Stockholm-listed shares in security services group Verisure VSURE.ST open at EUR 14.6 per share on market debut, about 10% above the IPO price
** The IPO price set at EUR 13.25 per share valued the group at EUR 13.7 billion ($15.91 billion)
** The offering, which was oversubscribed, included an overallotment option, which if exercised in full, was to bring proceeds of the IPO to total around EUR 3.6 billion, the company said
** Verisure, a Switzerland-based alarm maker, is a former unit of Sweden's Securitas SECUb.ST, which spun off and listed in 2006 as Securitas Direct
** Its current majority owner is U.S. private equity firm Hellman & Friedman
($1 = 0.8612 euros)
(Reporting by Elviira Luoma)
((Elviira.luoma@thomsonreuters.com))