> RICH WELL DRILLING & PUMP SERVICE, INC. California Since: 2007 RICH WELL DRILLING & PUMP SERVICE, INC.
> STALLWORTH CONSTRUCTION AND MANAGEMENT CORP California Since: 2020 STALLWORTH CONSTRUCTION AND MANAGEMENT CORP
> PHARMARON (SAN DIEGO) LAB SERVICES LLC California Since: 1999 PHARMARON (SAN DIEGO) LAB SERVICES LLC
