Wich game companies have never changed their logos?

[masschamber]

capcom has, I know of at least 2 other logos, one red lettered, and the other white letters in a red block in the same font, both of which are different than the current font

but it has been the same for the past ~15 years or so

atari's has changed, plus atari hasn't been atari in forever to begin with

sega's has changed for over 40 years, It has been the same since 1968's missile command, but on the early 1968 Periscope it Sega's logo was different, red letters in a different font

Nintendo's logo has changed, it was a different font, on a banner for Sherif, and it was probably different during their pre-video game hears

Activision's actually has changed, but it reverted back to the original logo, for a while it had rainbow colors leading up to the a of Activision