For almost sixty years, Washington H. Soul Pattinson and Co. $SOL.AX and Brickworks Ltd. $BKW.AX have maintained an interlinked shareholding structure unique among listed companies. Soul Pattinson, a major diversified investment company, owns 43% of Brickworks, Australia’s leading brick manufacturer. Conversely, Brickworks holds 26% of Soul Pattinson. This reciprocal arrangement was originally designed to stabilize both firms' dividends amid cyclical downturns in the construction sector.