Featured in: Underworld: Awakening (2012)
Antigen is a biotech pharmaceutical company employed by world governments to contain and experiment on Vampires and Lycans after they are captured. In reality, Antigen is a front operated by the Lycans to fool the governments into believing that they are extinct, as to turn the humans’ attention to killing the old adversary of the Lycans, the Vampires. The head of Antigen is Dr. Jacob Lane. Their headquarters are likely located in Hungary.
https://underworld.fandom.com/wiki/Antigen