8K's need to be filed on any "significant" event that the company experiences, in the case of an acquistion of something, and that something represents more then a certain percentage (10%) of the assets or revenue of the public company, the company has set number of days to provide an audited statement of what was acquired not of exact time but you can bet it isn't 90 days and they're beyond that now. You might go to www.sec.gov and do some searching for the exact time.
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