** Shares of Fortescue FMG.AX rises 2.5% to A$15.85, touching their highest level since March 28

** FMG posts 6.5% higher third-quarter iron ore shipments despite weather related operational constraints

** Co maintains fiscal 2025 iron ore shipments and capital expenditure guidance

** Shares rise in tandem with a 0.6% gain on the mining sub-index .AXMM

** Stock rose as much as 2.8% earlier in the day, marking its biggest intraday gain since April 28

** FMG down 15.23% this year, as of last close

(Reporting by Roushni Nair in Bengaluru)

((Roushni.nair@thomsonreuters.com;))