Since there are almost 400,000 shares on the list it mean PT shares are included. But there are no transfers with around 20,000 shares (btct.co and bitfunder). So it must mean the pass through exchanges don't get dividends in one transfer, but multiple.
Which of the transfers belong to pass throughs?
Hint: On the passthrus, you can see how many each hold (BF/BTCT). Check out the G Doc listed above to see which address that holds that number of shares. Presto...