"who (apparently) used to work as a market maker"
= possibly factual, possibly not, but you would like us to believe it's true anyway.
"range WOULD be on the radar of fund managers so would expect at least the 10M buy to be at least part of one of those orders"
Sounds LIKE supposition to me. Will we know if it is factual, or not, if we wait the 72 hours & a bit?