|this is too small to read (though you can click on it, which improves things).|
The chart deserves a careful look, as those faint lines can explain the confusing mess of who bought whom and why certain names vanish from the board. AOL didn't disappear—it became part of Time Warner for a while. Ask Jeeves became just Ask. CNET became part of the CBS empire.
Yahoo has been first or second every year from 1997 to 2013. I am astounded. As I am by Microsoft appearing at three in 2013.