More than 21 outlet stores and restaurants will be in business by the end of the month at the 500,000-square-foot Outlets at Assembly Row in Somerville, developer Federal Realty Investment Trust announced.

The Nike Factory Store will open Friday, joining JP Licks and AMC Assembly Row 12 with IMAX as the first tenants to open their doors.

Starting May 22 and running through the end of the month, another 18 storefronts will open, including adidas, Brooks Brothers, Charlotte Russe, Chico’s Outlet, Clark’s, Converse Factory Store, Kay Jewelers Outlet, Le Creuset, LEGOLAND Discovery Center Boston, Luggage Factory, Orvis, Papagayo Mexican Restaurant and Tequila Bar, Pendleton Woolen Mills, PUMA, Reebok, Saks Fifth Avenue Off 5th, Steve Madden and Wilsons Leather.

Additional outlets and restaurants will open throughout the summer and fall including Hair Cuttery, Legal on the Mystic, Fuji Restaurant, Soma Salon by Aveda, candy shop Sugar Heaven, Motherhood Maternity, J. Crew and LOFT outlet stores, Ernesto’s Pizza, PAUL Bakery and Earls Kitchen + Bar. 

The 40-acre mixed-use development is being built on the Mystic River on the site of a former Ford Motor Co. factory that closed in the 1950s. It will include a six-acre waterfront park, a new station on the MBTA Orange Line, a hotel, 1.75 million square feet of office space and 2,100 residences.