[nickpsecurity]

A company with 50,000 employees in its corporate office(s) is huge. Saying another huge company is a bit larger and therefore this company is no longer huge is nonsense. Also, that a common range for defining "mid-sized" companies is under 1,000 employees should hint that Apple is beyond large. Here's a nice summary on how SBA and some companies classify other organizations:

http://smbresearch.net/sizing-up-smb/

Businesses with thousand or more employees are so rare as percent of the whole that they deserve their own category anyway. As in, what you say about them wouldn't apply to businesses in general and vice versa.