The biggest moneymaker for Regeneron (REGN +3.08%) is Eylea, an eye disease drug that the company makes in collaboration with Bayer (BAYR.Y +4.15%). All net sales from Eylea in the U.S. are awarded to Regeneron, and the company splits the revenue earned from markets outside the U.S. with Bayer.
Regeneron also has a lucrative partnership with Sanofi (SNY -0.45%), another life sciences and pharmaceutical company. Together, the two companies are marketing and selling the autoimmune disease drugs Dupixent and Kevzara, the cancer drugs Libtayo and Zaltrap, and the cholesterol drug Praluent.
The company won initial approval from the FDA in February 2021 for Evkeeza in treating homozygous familial hypercholesterolemia (HoFH), a rare form of high cholesterol, in patients ages 12 and older. It also picked up an additional approval for the drug in March 2023 for treating HoFH patients between the ages of 5 and 11.
Regeneron also now has another drug in its lineup. The company won FDA approval of Lynozyfic (linvoseltamab) in treating relapsed/refractory multiple myeloma in July 2025. Its pipeline also includes 15 late-stage programs.