Amgen MariTide Stands Alone as Sole Obesity Asset After AMG 513 August Discontinuation; Wells Fargo Week Extended-Dosing Positioning Continues Into Weekend Commentary
Amgen (NASDAQ: AMGN) executive commentary continued through the weekend of September 12-13, 2026 following Thursday's Wells Fargo Healthcare Conference in Boston, reinforcing that MariTide (maridebart cafraglutide, antibody-peptide conjugate combining a GLP-1 receptor agonist peptide with a GIP receptor antagonist antibody scaffold) is Amgen's sole obesity asset following the August 4, 2026 Q2 earnings-call disclosure that Amgen had discontinued Phase 1 candidate AMG 513. The AMG 513 discontinuation followed a similar Amgen fate for AMG 786 in 2024 and reflects the company's high internal efficacy bar for obesity assets against the emerging retatrutide (Lilly, ~28% weight loss in TRIUMPH-1) and CagriSema (Novo, ~20% in REDEFINE) benchmarks. Amgen's positioning for MariTide anchors on 8-week or quarterly maintenance dosing (4-6 doses per year), Phase 2 20% weight loss at 52 weeks, and cardiometabolic secondary benefits (triglycerides, hs-CRP, blood pressure). MARITIME-SWITCH Phase 3 tests conversion from weekly injectable semaglutide or tirzepatide to monthly MariTide. Analysts continue to seek Amgen M&A activity to broaden the obesity asset base, but company executives at Wells Fargo said the late-stage pipeline is largely full and business development will focus on earlier-stage opportunities.