The 2025 launch of biosimilars to Johnson & Johnson’s Stelara (ustekinumab) marks another turning point in pharmacy benefit dynamics. But unlike the chaotic rollout of Humira biosimilars, pharmacy benefit managers (PBMs) came prepared.
Private label strategies, aggressive pricing, and exclusive formulary deals have transformed what might have been a slow-crawling biosimilar introduction into a full-on pricing war. As with Humira, the reality of biosimilar economics is far messier—and more revealing—than the policy narratives suggest.
In this post, I examine how the major PBMs—and some of the smaller ones—are handling Stelara biosimilars, what’s changed since the Humira experience, and why their strategies reflect the growing dominance of private-label rebating schemes.
As always, with great pricing power comes great responsibility. Excelsior!