** Utility NRG Energy's NRG.N shares rise 6.4% to $109 premarket
** Co beats Q4 profit estimate, helped by lower costs and higher demand for power
** Q4 adj profit of $1.56/share beats est of $1.29/share - data compiled by LSEG
** Co announces agreement with GE Vernova and Kiewit to bring up to 5.4 gigawatts (GW) of new gas-fired power generation online between 2029 and 2032
** Co reaffirms 2025 guidance range of $6.75-$7.75 for adjusted earnings per share, midpoint of which is above est of $7.19 - LSEG data
** As of last close, shares up 13.54% YTD
(Reporting by Katha Kalia)
((katha.kalia@thomsonreuters.com))