GMAB stock slides as Genmab scraps late-stage acasunlimab cancer therapy
NEW YORK, December 30, 2025, 1:54 PM ET — Regular session Genmab A/S’s U.S.-listed shares (GMAB) fell 3.3% to $31.45 in Tuesday’s regular session. The stock traded between $31.40 and $32.06 after opening at $31.98, with about 1.9 million shares changing hands. The move keeps attention on Genmab’s pipeline as investors reassess which late-stage assets can power growth. Dropping a late-stage program can change a biotech’s outlook quickly because those trials sit closest to potential approvals and revenue. Genmab said on Monday it will discontinue further clinical development of acasunlimab after a portfolio review, citing a more competitive landscape. “After