Which company co-founded Ivy Park with Beyoncé in 2016?

Topshop co-founded Ivy Park with Beyoncé in 2016.

Ivy Park began as a joint venture between Beyoncé and Sir Philip Green, whose Arcadia Group owned the Topshop retail brand. The activewear label was announced in 2016 and named partly after Beyoncé’s daughter, Blue Ivy, and Parkwood, the entertainment and management company she founded.

The partnership later ended, and Beyoncé became the sole owner of Ivy Park in 2018. In 2019, Ivy Park entered a separate creative partnership with Adidas, which led to a major fashion and footwear collaboration.

That later Adidas relationship is the main source of confusion in this question. Adidas was an important subsequent partner, but Topshop was the company associated with Ivy Park’s original 2016 joint venture.