Who acquired Sotex?: Sotex was acquired into Chevron Corporation, which is the current successor entity in the chain tracked by the OGLandman M&A directory.
Is Sotex still an independent company?: No. Sotex is no longer independent; it is now part of Chevron Corporation.

Tracing a mineral owner's company?

Scout CRM carries corporate lineage in owner records so you know which successor entity a mineral interest rolls up to today.