Well, the manufacturer's site indicates that it will hold a maximum of 15 kg, which is roughly the weight of your monitor. However, I purchased it for my pg35vq which is about 10 kg and I am under the impression that it would not hold another kilogram. I think that it is because the screen is curved, which makes that the center of gravity of the monitor is further away than a non-curved one. Therefore, there's more pressure on the stand.
Also : while arctic indicates that this stands will hold a 21:9 screen, they say nothing about à 32:9.
Long story short : I wouldn't recommand this stand for your screen, I would go for something that could hold more weight.

Exactly what Skelerex says. Look for one where the vertical pipe is not a pipe but something with joints, or at least it has some grooves or a pin to support it. Also make sure that your table is very stable, due to the distance from the foot you can put up to a few times the weight of the monitor. Try holding a 5L bottle with your arm streight to see the difference.

Thank you very much for your feedback. I’ve also reconsidered and I am buying the Ergotron HX, I think that one will work just fine.