The Q3 drop was not $35, but roughly one fifteenth of that - $2.11, as on 7/01 stock opened at $206.14 while on 9/30 it closed at $204.03
The net reduction of in institutional SO was not 11M shares, but about 30% less - 8.75M shares. See snapshot of the
NASDAQ summary below
The most likely sequence of events can be surmised by looking at the chart. Whatever positions institutional SO trimmed for whatever reason (whether unhappiness with SCTY acquisition, or in reaction to global concerns post Brexit) were most likely sold into the shares recall - it would be plain stupid for them not to do it, as they had first hand knowledge of the recall dynamics, and selling into the recall when stock was trading in $220-$230 range in spite of an assault of mostly fabricated "bad news" assured that they got top dollar for the stock. The slide down from this $220-$230 plateau was triggered when after period of no shares available for shorting there was over a sudden sizable dump of shares for shorting and sudden availability of them.
I think that before speculating one needs to take a look at the chart to see if speculation is consistent with it. Since this topic and narrative which I believe to be inaccurate keeps popping up, I am going to post annotated chart over the weekend which in my view shows that this narrative is questionable. What I see is that SP drop in Q3 (after the rise and trading in $220-$230 range associated with shares recall) was mostly defined by incessant negative propaganda coupled with the strategic shorting attacks.
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