Nice collection of charts. However, I’m not really sure if it conveys the right message and the complete picture. You could have provided some more information about what you left out. As far as I can tell, the data at https://thetangle.org/statistics/tokens-distribution is accurate. It currently says that more than 75% of all IOTA is held by the top 100 addresses. This is far from the <40% in your chart.
Apart from that: Since transactions cost nothing, any whale can easily split his or her balance among as many addresses as necessary to achieve whatever distribution is desired (almost).