The lead tenants are in varying stages of occupancy in new Rosemont, Ill., and Naperville, Ill., office buildings that were developed and constructed by Ryan Cos.’ Midwest Division, headquartered in Naperville.

Rosemont Corporate Center and 111 Shuman Boulevard are the first Class A office buildings to come on line in the O’Hare and East-West Corridor markets since November 2008 and October 2008, respectively.

In addition to its role developing and constructing these buildings, Ryan is the property manager for both buildings.

Rosemont Corporate Center was constructed on a three-acre site south of Balmoral Avenue, between River Road and Interstate 294.

The site is immediately south of the Rosemont Theatre and adjacent to the Village’s Entertainment District consisting of restaurants, hotels and other retail amenities.

The building was constructed to meet LEED Gold certification criteria. Among the features helping the building and its tenants achieve certification is an under floor air distribution (UFAD) system.

Other green features include energy efficient mechanical and electrical systems and water conservation plumbing features.

The building at 111 Shuman Boulevard has been completed and Delta Dental of Illinois has moved into its space.

The 85,000-sq-ft building was designed and constructed by Ryan.