** Mastek MAST.NS rises as much as 5.8% to 2,318 rupees; set to snap three straight sessions of losses
** Technology solutions provider's promoters exploring sale of ~20% stake, per CNBC-TV18 report
** Promoters seeking up to 25% premium over current market price, report adds
** Stock rated "buy" on average; median PT at 2,757.5 rupees, per data compiled by LSEG
** MAST last up 1.6%, taking YTD losses to 25.5%
(Reporting by Mridula Kumar in Bengaluru)
((Mridula.Kumar@thomsonreuters.com;))