** Shares of Cambium Bio rise as much as 220% to A$0.016, its highest since early-July 2023

** Stock last up 140%, set for best day ever

** Clinical-stage regenerative medicine maker says it has successful completed the merger with Cambium Medical Technologies

** Adds, it will raise A$3.48 mln ($2.3 mln) in placement at A$0.006 per share, a 20% premium to its last close

** About 22.9 mln shares change hands, in its most active session on record

** Stock up ~67% YTD, as of last close

($1 = 1.5221 Australian dollars)

(Reporting by Neha Soni in Bengaluru)

((Neha.Soni@thomsonreuters.com))