What happened

Regenexbio (RGNX 1.66%) stock is shooting higher after the clinical-stage biotech signed a new collaboration deal with AbbVie (ABBV 0.98%), a giant global pharmaceutical company. Investors happy with the generous terms of the deal pushed Regenexbio shares 25.6% higher as of 2:06 p.m. EDT on Monday.

So what 

License and royalty revenue from Novartis regarding Zolgensma isn't nearly enough to fuel Regenexbio's ambitious development pipeline. Today's deal with AbbVie, though, gives the company a lot more cash to work with.

Investor looking at a stock chart.

Image source: Getty Images.

Upfront, AbbVie will pay Regenexbio $370 million for rights to RGX-314, an experimental gene therapy for the treatment of progressive retinal diseases that cause vision loss for millions of older Americans. 

Regenexbio will be responsible for two ongoing phase 2 trials that administer RGX-314 with a relatively simple method of injection. AbbVie will share costs for upcoming trials that employ subretinal injections in the U.S. and lead global development efforts.

Now what

If RGX-314 earns approval, the partners will share equally in profits from net sales in the U.S. AbbVie will pay Regenexbio a tiered royalty percentage on any sales outside of the U.S. 

Under the terms of the agreement, Regenxbio is also eligible to receive up to $1.3 billion in milestone payments.

We'll get to see why AbbVie felt moved to make such a generous offer for Regenexbio later this month. The company will present data from a phase 2 trial with age-related macular degeneration patients at the Retina Society's 54th Annual Scientific Meeting.