Oversee.net ($1B) – Los Angeles 23. ReachLocal ($450M) – Woodland Hills 55. Interestingly enough, two companies on the list (NewEgg and Demand Media) were ranked well above media darling Twitter (at #15, just above Oversee.net). The Silicon Alley Insider has weighed in on its list of “ 50+ most valuable startups “, and suprisingly, they didn’t neglect Southern California. Facebook was tops, but local companies highlighted in the list:

Total Funding: $355.00M Investors: 3i Ventures Generation Partners Goldman Sachs Lance Armstrong Foundation Oak Investment Partners Spectrum Equity Investors Oversee.net - 515 South Flower Street, Suite 4400 Los Angeles CA 90017 - Operates an advertising network, services for parked domain name holders, and a series of consumer focused web sites. Total Funding: $150M Investors: Oak Hill Capital Partners Adconion.com 1322 3rd Street Promenade, 2nd Level Santa Monica, CA 90401 Performance-driven online advertising and content syndication network. A stealth internet advertising / publishing renaissance is quietly happening in Southern California 10 years after the dot com bubble burst.

However, it was interesting to note that Number 1 on the list was ReachLocal , the Woodland Hills-based provider of local search advertising services — topping the list with 146,050% growth over 5 years. Aside from ReachLocal, I see The Search Agency (SEO services, #83), Hydra (Internet ads, 87), Gorilla Nation at 243, and Oversee.net at 326. Perusing the Deloitte Technology Fast 500 list for this year — the ranking of the fastest growing companies in North America , based on the last five years of revenue–it’s quite surprising to note the sheer number of Southern California firms listed.