Ann: Becoming a substantial holder, page-6

The RMS short is an all time high, 6.35% and rising. SPR more stable at 2.5%, perhaps up 0.5% since merger announced.

ShortMan - Short position graph for RMS

There is a positive aspect to short positions, in that the shares may be repurchased at some point, or absorb a placing supply. The RMS rise does seem strategic, like 'doubling down' from the previous 4% level.