Markku Juhani ”Mato” Valtonen (born 21 February 1955) is a Finnish actor, musician and entrepreneur. Valtonen has been a member of the Finnish band Sleepy Sleepers since 1975 and the Leningrad Cowboys since 1989.
He was the CEO of WAPit telecommunications company from its inception in 1998 until it declared bankruptcy in 2001.
