Grubb & Ellis Co., a real estate services and investment firm, announced on Tuesday that it had revenues of $160.6 million for the first quarter of 2008 and a net loss of $5.9 million.

In a press release, the company said the loss was due to charges related to the previously announced write-off of the company’s investment in Grubb & Ellis Realty Advisors as well as merger-related and integration costs resulting from the recent merger with NNN Realty Advisors LLC.

Grubb & Ellis/Mid-America Commercial in West Des Moines is an affiliate of the company.