As I understand it, it’s called a Net Trade or Average Weighted Trade (Avg on the provided screenshot) where typically a financier or insider has a block of shares that they are selling and needs the broker dealer to liquidate them at a negotiated price.
From the FINRA handbook:
Section 404: Weighted Average Price/Special Pricing Formula Transactions
Q404.1: Member BD1 executes multiple trades to satisfy a customer order and then trades with the customer at a price equal to the volume-weighted average cost of the original trades plus a net difference in accordance with a net trading agreement with its customer.