Alexey Lugovskoy

Alexey 'Alex' Lugovskoy is the co-founder and CEO of Diagonal Therapeutics, a Watertown/Cambridge, Massachusetts biotech building 'clustering' antibodies that switch cellular signaling back on rather than block it. A Harvard-trained biophysicist who left physics after deciding green leaves were more interesting than tau neutrinos, he spent two decades in antibody R&D at Biogen, Merrimack, Morphic, and Dragonfly before launching Diagonal in 2022. He has co-invented an FDA-approved cancer drug, authored more than 100 patents and papers, and edits the antibody journal mAbs. In January 2026 Diagonal closed an oversubscribed $125M Series B co-led by Sanofi Ventures and Janus Henderson to push its lead program, DIAG723, into human trials for hereditary hemorrhagic telangiectasia.