** Shares of U.S. gas utility Southwest Gas Holdings SWX.N
up 5.5% at $66, hit highest in six months earlier in the session
** Co posts Q4 profit of $1.13/shr, beating analysts' avg
est of $1.12/shr - LSEG data
** Co's quarterly rev of $1.37 bln beats est of $1.30 bln
** Centuri business separation plan still on track - co
** Firm had previously announced in December its intention
to separate its utility infrastructure services business Centuri
via initial public offering
** SWX stock has risen 4.3% so far this year
(Reporting by Kabir Dweit)
((Kabir.Dweit@thomsonreuters.com;))