** Johns Lyng Group JLG.AX soars as much as 23.3% to A$3.92, highest since late February
** Stock on track for biggest intraday pct gain ever
** Building services provider agrees to be acquired by Sherwood BidCo, entity owned by private equity investment firm Pacific Equity Partners, for A$1.1 bln ($725 mln)
** Deal values co at A$4.00 per share, a 25.8% premium to last close
** Stock sees most active session since March 16, with ~13 million shares traded vs 30-day avg of ~1.9 mln
** YTD, JLG falls ~15%
($1 = A$1.5172)
(Reporting by Anjali Singh in Bengaluru)
((anjali.singh2@thomsonreuters.com))