I just read your first couple of examples and while those types of shorts are called "naked" they aren't really.
That's very common, funders and insiders shorting against their own convertibles or restricted stock. They cover with their own stock, not on the open market. They are in effect borrowing their own stock for the short sales.
went NAKED anticipating RME to DUMP
In that case there would be fails to deliver...there aren't any, or not many anyways. If memory serves it was about 55k shares at the end of December.
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