Grubb & Ellis Co. is a commercial real estate services and investment management company. The company's range of services includes tenant representation, property and agency leasing, commercial property and corporate facilities management, property sales, appraisal and valuation and commercial mortgage brokerage and investment management. It operates its business through the following segments: Management Services, Transaction Services, Investment Management and Daymark. The Management Services segment includes property management, corporate facilities management, project management, client accounting, business services and engineering services for corporate occupier and real estate investor clients. The Transaction Services segment comprises the company's real estate brokerage, valuation and appraisal operations. The Investment Management segment includes services for acquisition, financing and disposition with respect to its real estate investment trusts, asset management services related to its real estate investment trust, and dealer-manager services by its securities broker-dealer, which facilitates capital raising transactions for its real estate investment trust. The Daymark segment includes services for acquisition, financing and disposition with respect to the company's tenant-in-common programs and asset and property management services related to the company's tenant-in-common programs. The company was by Harold A. Ellis Jr. and Donald James Grubb Sr., founded in 1958 and is headquartered in Santa Ana, CA.