One Commerce Square

One Commerce Square is a 30-story skyscraper in Downtown Memphis which is locally referred to as the "iBank Tower". The building was formerly known as the NBC Building and the SunTrust Building, and is the fourth tallest building in Memphis, Tennessee. The building is located at the corner of Monroe Avenue and South Main Street.

Construction
Construction started in 1972 by the National Bank of Commerce (NBC), and the building was completed in 1973, preserving the original bank lobby that was built in 1929. One Commerce Square represents a modernism architectural style and is currently a Class A multi-tenant commercial office building in downtown Memphis. It was designed by local Memphis architect Roy Harrover who also designed the Memphis International Airport and Memphis College of Art. Locally, it became known as the "NBC Building." In 1984, NBC sold the building for $46.1 million.

Foreclosure
In 1996, the building was sold out of foreclosure for $21.7 million.. The building was purchased in 1999 for $31.5 million by Jacksonville, FL-based Southcoast Capital Group, which operated as One Commerce Square LLC. However, One Commerce Square LLC defaulted on a $24.5 million loan dated December 20, 2002, through Archon Financial LP.

SunTrust
In 2005, NBC, still the anchor tenant of the building at the time, was acquired by SunTrust Banks, and the building became known as the SunTrust Building. The building suffered a major blow when its anchor tenant, SunTrust, vacated 155000 sqft in the building when its lease ended in January 2009.

Pinnacle Airlines
On October 8, 2010, regional airline Pinnacle Airlines Corp. announced that it intended to move over 600 employees that would occupy 155000 sqft on 12 floors of One Commerce Square. The Downtown Memphis Commission helped attract Pinnacle by providing $5 million of a total $20 million public/private investment, along with the city of Memphis, to refurbish the building and provide below-market rental rates to new and existing tenants. The move took place in the autumn of 2011, contingent on a lease with the potential ownership group of Lynch-Schledwitz-Prosterman. The architecture firm of Looney Ricks Kiss designed a makeover of the building. However, Pinnacle Airlines announced in January 2013 that it would relocate to Minneapolis, thereby vacating the above mentioned space.

Southern Airways Express
Southern Airways Express launched operations in June 2013, with its first flight taking place on Wednesday, May 29, with an inaugural flight for industry partners and members of the media from Memphis to Destin. Stan Little, chairman and CEO, answered the first phone call after the airline moved into its new office headquarters in One Commerce. On March 7, 2016, Southern announced the acquisition of Fort Lauderdale-based Sun Air Express. Following the acquisition of Sun, the operational headquarters of Southern Airways was relocated from Memphis to Pompano Beach, Florida.

Memphis Commerce Square Partners
On October 30, 2009, Park National Bank was taken over by the Federal Deposit Insurance Corporation and the bank's assets were sold to U.S. Bancorp. In December 2010, a local investment group known as Memphis Commerce Square Partners purchased the building from U.S. Bancorp. Management is by Cushman & Wakefield.