...that is the quarterly report. Institutions have 45 days to file it. I asked about the monthly report you said was available.
Perhaps you mis-read what I said:
"I believe shorts are updated once a month in the second week - about 10th."
With respect to the monthly short report - they are computed up until about the 10th of the previous month. But the report, itself, will not appear until about 15-20th.
As for institutional ownership - do you know who it was who said there is a different reporting date for 5% and insider ownership and the rest? I can't find that post. Do you have a link to the reporting rules for institutional ownership?