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Lilly agrees up to US$2.9bn deal for Merida Biosciences

The obesity drug leader is broadening into immunology with a platform that removes harmful antibodies rather than suppressing the immune system.

M&A News deals deskHealthcare / Biotech · United States, Americas31 Aug 2026

Eli Lilly agreed on 31 August to acquire Merida Biosciences, a developer of precision therapies for autoimmune and allergic diseases, for up to $2.875bn in cash.

Merida Biosciences website: meridabio.com

Why Eli Lilly and Company is buying Merida Biosciences

Lilly said Merida's antibody-engineering platform is designed to remove disease-causing antibodies precisely and durably while preserving normal immune function, strengthening its immunology pipeline.

“We’re building our pipeline around therapies that meaningfully change the course of disease, not just its downstream effects.”Francisco Ramírez-Valle, SVP, Lilly Immunology Research and Early Clinical Development

Deal terms and financing

The price includes an upfront payment and contingent milestone payments; Lilly did not disclose the split.

Regulatory approvals and timing

Closing is expected in the fourth quarter of 2026, subject to regulatory approvals and customary conditions.

Market context

Initial Phase 1 data showed MER511 substantially lowered thyroid-stimulating antibodies with a favourable early safety profile. Lilly's deal spending in 2026 has outpaced prior years as it expands beyond obesity and diabetes, Reuters reported.

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