** Shares of Jack in the Box JACK.O down 2.57% at $14.01 premarket
** Co posts Q4 revenue of $326.2 mln vs $349.3 mln a year earlier; analysts' estimate was $356.5 mln according to data compiled by LSEG
** Jack in the Box and same-store sales down 7.4% and 3.9%, respectively in Q4, both hurt by lower transactions and unfavorable mix despite menu price hikes
** Net earnings drop to $5.8 mln from $21.9 mln last year
** CEO says company is "working with urgency" to restore momentum and expects improvements from structural changes under its "Jack on Track" plan
** As of last close, JACK down 65.47% YTD
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))