Well, I see then that you are relatively new to investing.
Those are very important documents for an investor to read about the companies he/she is about to invest in.
The 10-Q is the quarterly financial updates the 10-K is the yearly financial update. These contain financial and share structures. Very important to know the key points of them.
8-K is any pertinent changes to the company in regards to share structure, accountant changes, etc etc
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