** Shares of Magellan Financial MFG.AX jump as much as 31.3% to A$11.11, their highest level since August 20, 2025
** Stock set for it strongest intraday trading session since September 7, 2006, if gains hold
** Stock resumes trading after being on halt on Monday, but emerges as top gainer in ASX 200 benchmark index .AXJO
** Co said on Monday it will acquire all issued shares of Barrenjoey Capital Partners that it does not currently own at an implied value of A$1.62 billion ($1.15 billion) for Barrenjoey as a whole
** Co announced share placement to raise up to A$130 million at A$8.45 per share
** YTD, stock up 5.3%, including the day's moves
($1 = 1.4085 Australian dollars)
(Reporting by Shivangi Lahiri in Bengaluru)
((shivangi.lahiri@thomsonreuters.com))