Large Businesses in SD

Im looking for some key information for stat surveys.

I am currently trying to find the largest most successful businesses, which have offices located in SD.

Im mainly looking for companies who have many employees(50 min or more).

If anyone has feedback or shortcuts to finding this information, would be much appreciated.
Thanks in advance!

Hillbilly said:

Go to the American Chjamber of Commerce in Santo Domingo

HB

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Good suggestion HB! and yes I have already gone down that path with some, but not alot of success. I have reached out to all Chambers.

Any other ideas?