** Shares of Vault Minerals VAU.AX rise as much as 11.9% to A$0.47, their biggest intraday pct jump since October 6, 2023

** Stock hits its highest level since June 5

** Gold producer announces on-market share buy-back for up to 10% of shares on issue

** Posts turnaround to FY NPAT of A$237 mln ($152.44 mln) from loss A$5.4 mln last year

** Says full-year gold sales jumped 72% to 385,232 ounces

** Stock up 42.4% YTD

($1 = 1.5547 Australian dollars)

(Reporting by Sneha Kumar in Bengaluru)

((Sneha.kumar@thomsonreuters.com;))