Internet-marketing firm Sidecar will lease 15,550 square feet at the One South Broad office building to accommodate an expansion, SSH Real Estate said in a release on Monday.

Sidecar is consolidating from a 3,500-square-foot space at 114 S. 13th St. and a 2,400-square-foot temporary office at 123 S. Broad St., according to SSH, which represented the company in the lease.

Clients of Sidecar, which uses predictive technologies to help retailers optimize results on search engines and shopping sites, include Under Armour, Century 21 and, according to its website.

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