No acquisitions or dispositions of assets need be reported under RCW 48.05.510 if the acquisitions or dispositions are not material. For purposes of RCW 48.05.510 through 48.05.535, a material acquisition, or the aggregate of any series of related acquisitions during any thirty-day period; or disposition, or the aggregate of any series of related dispositions during any thirty-day period is an acquisition or disposition that is nonrecurring and not in the ordinary course of business and involves more than five percent of the reporting insurer's total assets as reported in its most recent statutory statement filed with the commissioner.