What is the name of the company that built the Aperture Science Enrichment Center?

The company that built the Aperture Science Enrichment Center was Aperture Science. The facility is the underground testing complex where the company developed and evaluated portal technology, experimental energy devices, and artificial intelligence systems.

Aperture Science began as Aperture Fixtures, a shower-curtain company founded by Cave Johnson in 1947. It later became Aperture Science and shifted toward increasingly ambitious scientific research. The Enrichment Center expanded beneath Michigan and eventually became a vast network of laboratories, test chambers, storage areas, and automated systems.

A common mix-up is confusing Aperture Science with Black Mesa, the research corporation from the Half-Life series. Umbrella belongs to Resident Evil, while the Combine are an occupying force in Half-Life rather than a company. Aperture Science is both the organization and, in some contexts, the branding associated with its technology and facilities.