"Leqembi comes from the Japanese pharmaceutical company Eisai and its U.S. partner Biogen. The companies have said Leqembi will cost about $26,500 a year."
https://www.npr.org/sections/health-shots/2023/07/06/1186225580/alzheimers-drug-leqembi-gets-full-fda-approval-medicare-coverage-lecanemab#:~:text=Leqembi comes from the Japanese,and its U.S. partner Biogen.