Looks like Advisor Group inc bought about 1,400 sh

Looks like Advisor Group inc bought about 1,400 shares Q2. They have billions of dollars in companies. If you look at their new companies they have bought a low amount of shares in a large majority of them, some as low as 100 shares. It seems like they use the small amount of shares as a place holder, watch companies and increase share amount as they seem fit. They increased shares on about 50% of their positions