you're close...
...the mystery buyer bought about that many shares and more from an old short seller for about that price (somewhat lower)...
...giving up, that short seller has now put it on the bid to buy back those shares before it's too late given the TICK TOCK situation.
My guess is that this old short convinced some new shorts (who know nothing about this company) to come on in and sell some of these shares short...so that he can cover and buy them. It's a shame that this old short doesn't only try to eat longs...but also likes to cannibalizes his own people too...I hope those new shorts learn never again to trust this old desperate short.
The above is just opinion speculating on who the buyers and sellers are...and as such I have no links...just an understanding.
I hope nobody sells to this old short...he needs to buy at a much higher price, I believe, in order to lose more money.
:)
Krombacher