BHP’s plan to unify its corporate structure has won support from funds management consolidator Wilson Asset Management (WAM), with the acquisitive firm expressing confidence that pre-positioning by investors will soften the shock that BHP’s unification will have on Australia’s flagship market indices.

BHP shareholders will next week vote on a plan for the Australian side of BHP’s dual-listed company structure to acquire the British side through a one-for-one issue of shares in BHP’s Australian-listed company.