The holding will only receive dividend if the subsidiary is listed on the stock exchange.
If the subsidiary is listed it will every week give away 15% of its profits, the percentage of shares the holding own will determine the percentage of those 15% it will receive. For example, if the holding own 100% then it will receive all those 15%, if it own 66% it will receive about 2/3 of the 15% which is about 10% of the total profits of the subsidiary.