RE:RE:Black Rock and Citadel Advisors increase $TLRY HoldingsYou are half right - only Citadel increased their holdings - it's indicated by the green color of the entry.
An Incomplete Picture
Another issue with 13F filings is that funds are only required to report long positions, in addition to their put and call options, American Depositary Receipts (ADRs), and convertible notes. This can give an incomplete and even misleading picture, because some funds generate most of their returns from their short-selling, only using long positions as hedges. There is no way to distinguish these hedges from genuine long positions on 13F forms.