Ann: Significant New Intersections in Step-Out Drilling at Jaguar, page-36

That's a valid point GH however in this case #2 (see below) is more than 1%. Apparently no applicable penalties so no big deal, but helpful to know what's happening on the register.

At just over 60% for top 20, register is become tighter with fewer shares available for sale which may explain the low volumes of late. Institutional buyers can't buy a full position all at once and rather than chase it up will accumulate over a long period of time which also means that, with long term intentions, they are not in a hurry to sell but will continue to nibble away on the buy side, preventing it from falling. They also like to keep their moves secret because they don't want to signal their moves to other investors who might buy ahead of them.