In a little more than a year and a half, BlackBerry CEO Thorsten Heins has watched more than $3 billion of the company's market value vanish.
BlackBerry's stock and market cap remained relatively stable throughout his tenure. Until it reported earnings last Friday, that is.
Not pictured: a $3 billion-ish drop in market cap in the past week.
So, how has Heins fared relative to other tech CEOs attempting a corporate turnaround?
Let's start with Scott Thompson, who as a former Yahoo CEO had a short crack at turning around the company before he was kicked out for fudging his resume.
Yahoo stock did basically nothing during his tenure, which started at the beginning of 2012. Compare that to Marissa Mayer, who took over for Thompson as CEO in July 2012
What about Carol Bartz, Thompson's predecessor as Yahoo CEO?
Basically the same thing: Yahoo's market cap didn't do all that much under Bartz. In fact, Yahoo generally hadn't done much financially or strategically until Mayer took over.
(Just ignore that little dip in the middle, looks like a blip in the data.)