The phrase "although possessing" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding someone's attributes or qualities.
Example: "Although possessing great talent, she struggled to find opportunities in her field."
Alternatives: "despite having" or "even though holding".
This, in Langella's interpretation, is Lear's tragedy: although possessing vast reserves of power, he is steeped in self-delusion.
And the room itself, although possessing the best view in the city, was not much bigger than the double bed it contained.
Although possessing a rather thin-toned tenor voice, Astaire received much praise from jazz critics for his innate sense of swing and his conversational way with a song.
Some Osteostraci, for example, possessed a flattened head shield and, although possessing a powerful swimming tail, appear to have been bottom dwellers.
Although possessing visibly human organs, the puppets are made out of mechanical spare parts that are easily detachable: when Pyramus seeks to woo Thisbe with fruit and flowers, he simply removes the top of her head and pops them inside her as if she were a walking trashcan.
Although possessing similar illness durations, these samples presented significant clinical differences and distinctive prescription patterns.
Although possessed of juvenile-lead looks and a fine speaking voice, he never liked acting and was much more at home producing.
Although possessed of a despotic temperament and capable of acts of cruelty, Justinian was in many ways an able ruler, who recovered for the empire areas of Macedonia that had previously been conquered by Slavic tribesmen.
This inevitably results in collections of models that, although individually possessing unique characteristics, also share a number of key similarities.
Although not possessing quick footwork, he was capable of quickly judging where the ball would land.
Although they possess colour vision, sloths' eyesight and hearing are not very acute; orientation is mainly by touch.
