Unity gains after Reuters report Silver Lake, PIF held recent buyout talks
** Gaming software maker Unity Software's U.N shares rise 4.4% to $50.94 premarket
** Silver Lake, PIF held talks in recent weeks to acquire Unity, Reuters reported after markets closed on Thursday
** Stock extends gains after closing up nearly 15% on Thursday
** Valuation of about $25 billion was discussed before Unity's latest earnings report, which lifted its market capitalization to around $21.5 bln, Reuters reports
** Unity reported its first quarterly profit on a GAAP basis for the July-September period on Thursday
** Up to last close, Unity up 10.5% so far this year