From SEC staff Memorandum: Figures 9B and 10B display daily counts of gross positions that surpass 7% and 10% of a U.S. listed security's market cap, respectively.
A single participant can hold multiple large positions, hence the count can exceed the total number of market participants...
Source: Memorandum from the Division of Economic and Risk Analysis
Look at how everything spikes in 2021... If you would like to comment about this, check out this post: