Ann: Syrah announces outcome of retail entitlement offer, page-21

The shortfall shares are not committed to institutions. There is a process to be followed here.
Firstly the retail holders have the chance to buy the shares at $3.25. If there is a shortfall (which there is), then the balance gets put into a retail book build facility under which institutions bid for the right to buy those shares. If there are no bids (likely in this case) then the underwriter must pick up the rights which have not been subscribed for. In turn the underwriter will claim on the sub-underwriters which means the sub-underwriters stump up the cash (@$3.25/share) and receive the shortfall stock.