Narus encompasses all its subsidiaries. As pandutji started getting old, he took up the mantel of Peter Weyland and combined all of Narus into Weyland Yutami Corporation. A lot later in the time line at the start of the 22nd Century, around that time frame he became ubiquitous with staff and crew, the executives. The priests also got obfuscated and nobody knows what happened to them. UAC was born out of all this and replaced every other name and brand that ever existed. No one was unique anymore, just people in armor suits with tinted helmets and guns. Everyone got militarized under UAC. Money was replaced with ranks, and the hierarchy was not too deep. Space ships, bases on Mars primarily. Other planets with off world locations bases for infantry.