Horizon Therapeutics has struck a $3 billion deal to buy AstraZeneca spinout Viela Bio. The takeover will give Horizon a clutch of clinical-phase autoimmune and inflammatory disease drug candidates, R&D capabilities and an approved monoclonal antibody.

Viela spun out of AstraZeneca with six drug candidates and $250 million early in 2018. Since then, the biotech has gone on to raise more money from private and public markets to advance its pipeline of assets. The lead program, Uplizna in neuromyelitis optica spectrum disorder, won FDA approval last year.

MOE…