Educational publisher Cengage has completed its search for new office space in Boston, with a commitment to move this fall from Channel Center to Tishman Speyer’s new 13-story office building on Pier 4 in the Seaport District.

The 10-year, 117,000-square-foot transaction completes the lease-up of the speculative project at the former Anthony’s Pier 4 restaurant property, which sits alongside a 100-unit luxury condo building also under construction. Boston Consulting Group in June leased 202,000 square feet on the seven upper floors, replacing its existing local offices at 53 State St. and 1 Beacon St. Investment managers Man Group signed a 10-year lease for 20,639 square feet on the fifth floor beginning July 1, according to a Suffolk County Registry of Deeds filing.

Cengage has 500 employees in its existing 120,000-square-foot offices at 20 Center Channel St. and plans to hire another 100. The textbook publisher, which reported fiscal 2017 revenues of $1.5 billion, is transitioning to digital course offerings, generating demand for additional positions including software engineers, product managers and salespeople.

“The amenities, dynamic nature of the neighborhood and unobstructed views of the Boston Harbor will fuel our momentum, while inspiring current and future employees to think big, embrace the unknown and accelerate new ways of learning,” Chief Technology Officer George Moore said in a statement.

New York-based developer Tishman Speyer acquired the Pier 4 property in 2014 for $71 million and partnered with two Chinese insurance companies on the $500 million office and condo development.

Pier 4 is the second speculative office building in the Seaport to complete its lease-up ahead of completion in recent months, following commitments by Needham-based PTC and New Haven, Connecticut life science firm Alexion Pharmaceuticals to fill up Skanska’s 121 Seaport office tower.