&gt; [...] Aol are really the only large headquartered technology companies that I&#x27;ve seen in Ashburn<p>The AOL buildings are mostly rented out at this point; I believe a Raytheon office resides in the majority of them.  So looking for headquarters doesn&#x27;t seem particularly meaningful.  What about large offices of global companies?  AWS US-East runs out of Ashburn, for example (not sure why Amazon doesn&#x27;t appear on the list at the link you gave).