Genmab to expand pipeline with Merus acquisition

29 September 2025

US traded shares of Dutch clinical-stage biotech Merus (Nasdaq: MRUS) leapt almost 38% to $94.85 in pre-market activity, on news of a takeover bid from Denmark’s Genmab (Nasdaq: GMAB).

Genmab has offered to acquire all of the shares of Merus, along with its lead candidate petosemtamab, for $97.00 each, representing a transaction value of around $8.0 billion.

The transaction has been unanimously approved by the Boards of Directors of both companies. A wholly owned subsidiary of Genmab will commence a tender offer for 100% of Merus’ common shares, which is anticipated to close by early in the first quarter of 2026.

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