Net assets under active equities management. "Active management" is a management style. For a definition, see e.g.
http://en.wikipedia.org/wiki/Active_management. The variations in number look like scribal slips, even though I suspect that, errors aside, "gestions" could refer to "funds", so that an alternative rendering could be "Net assets in actively-managed equities funds", with the above-referenced definition still holding true.
Perhaps, in line with Philgoddard's suggestion, it would be an idea to set out the table headings here in order, since it's only one table, and if there aren't too many of them.