Omar was among the Ten Rings members who captured Tony Stark in an attempt to build advanced weapons for them, thanks to a deal forged between Raza and Stane. However, Stark managed built a suit of weaponized armor. In Stark's ensuing escape, he destroyed the terrorists' camp and the amassed piles of Stark Industries' weapons to ensure that they don't fall into the wrong hands.
Following the defeat of Abu Bakaar, Omar and Ahmed were able to obtain the remains of the Mark I armor. They both tagged along with Raza to personally deliver the armor to an arriving Stane. But rather than striking a new deal in exchange for the armor, Stane instead killed Raza before taking the armor for himself, intending to use it to take over Stark Industries for himself. Stane then proceeded to have Ahmed, Omar and the other terrorists murdered to cover his tracks.