Web Service for finding basic company info

I'm looking for a web service similar to StrikeIron Zacks Company Profile. In particular I'm look开发者_运维技巧ing for company headquarters based on company name or stock ticker. If anyone knows where Google, Yahoo, or StrikeIron find this information, I would greatly appreciate it.

Thanks in advance

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The Mergent Company Fundamentals API will do exactly what you need: http://www.mergent.com/servius/

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Dun & Bradstreet? AFAIK, nothing they provide is free.