The amount of the deal was not disclosed.
The company intends to use the proceeds to grow, support new business ventures, and take advantage of market opportunities over coming years.
Founded in 2000 by CEO Marc Katz, CustomInk is an online provider of custom apparel and accessories for groups and occasions. It combines an online Design Lab with personal customer care for customers to create the design for any club, school, business, team, or charity.
The company, which has offices in Charlottesville, Virginia; Reno, Nevada; Dallas, Texas; Boston, Massachusetts; and Chicago, Illinois, employs more than 1,300 people nationwide.