as MojaveMeg guessed they were all relatively low net worth's (all less then H$10 million IIRC) and it could be that 1 security was all they had left after delists and/or cashouts. But as these are 50% plus increases its still several million in profits in a week and it just looks odd to me (as an admited newbie) when all the top ten for the week only own 1 or 2 securities despite having been registered for many years. I dunno, I'm just trying to understand and learn so I ask questions, including some strange ones. Heck, strange questions sometimes generate the best answers!