I can't name my employer (too small - less than a thousand egineers) but I can tell you they are tracking using a plugin for Atlassian. We are an Atlassian shop through and through including our source code control. They deployed this plugin last year. What is really sinister is that it's open to all employees so they can see in real time how they rank against their peers ącross the various metrics.

I'm pretty sure Atlassian peddles this product to everyone who uses their suite.