SAN FRANCISCO — Unprofitable and struggling Twitter is looking to sublease out a total of 183,642 square feet of space in its San Francisco offices, according to a seven-page marketing prospectus posted online.

Despite its place in popular culture, Twitter has long struggled to gain users and make money. Last week the company announced second-quarter losses of $107.2 million, or 15 cents a share,  share. Analysts had hoped for earnings of 9 cents a share.

Twitter moved into the Market street building in 2012, part of a much heralded rebirth of a long-blighted portion of San Francisco’s downtown corridor along Market Street. Since the social networking company arrived, other companies have also entered the area, followed by high-end restaurants and food stores.