It seems the term used for this strategy is "shorting against the box" , might be viable strategy as it doesnt trigger the ceasing sub holder notice until much later
Week 46 Wrap: Copper hits 2mth low as Trump threatens net zero pace; US rally fades; HotCopper’s picks
CUF CuFe sells its Crossroads gold royalty to Northern Star for $4M cash; says better than waiting for mine launch