Grubb & Ellis Co. reported fourth-quarter revenues of $163.5 million, an increase of about 10 percent compared with revenues of $148.7 million in the last three months of 2009. For the full year of 2010, the real estate and investment services firm reported revenues of $575.5 million, compared with revenues of $527.9 million the prior year. On Feb. 10, the company announced the creation of Daymark Realty Advisors – a wholly owned subsidiary of Santa Ana, Calif.-based Grubb & Ellis – that will take over management of the company’s tenant-in-common programs. Revenue for that new reporting segment totaled $6.2 million for the fourth quarter, compared with $5.8 million in the fourth quarter of 2009. Daymark serves more than 5,200 investors and oversees a nationwide portfolio of commercial properties totaling approximately 33 million square feet, including more than 8,700 multifamily units.