** Shares of Seamec SEAM.NS up as much as 13.08% to 725.95
rupees, their highest since Aug. 16
** Co hits sharpest intraday pct gain since June 30
** Oilfield services provider said it entered into addendum
with Posh India Offshore for project worth 486 million rupees
($5.8 million)
** Stock most active since March 10; about 442,911 shares
change hands as of 1:44 p.m. IST, 13.6x the 30-day average
** Stock last up 12.8%, trimming YTD losses to 21.1%
($1 = 83.2440 Indian rupees)
(Reporting by Manvi Pant in Bengaluru)
((Manvi.Pant@thomsonreuters.com; +918447554364;))