Core Insights - Biotech companies experienced significant gains in after-hours trading, driven by investor interest despite limited news catalysts [1] Company Updates - GH Research PLC (GHRS) saw the largest increase, rising 22.36% to $16.20 ahead of a key update on its Investigational New Drug Application (IND) for GH001 with the FDA, scheduled for January 5, 2026 [2] - Phathom Pharmaceuticals, Inc. (PHAT) increased by 5.03% to $16.50, with the rise attributed to investor positioning rather than new announcements [3] - Forte Biosciences, Inc. (FBRX) gained 3.56%, closing at $24.45, continuing its upward trend in the biotech sector without any new updates [3] - OKYO Pharma Limited (OKYO) advanced 5.38% to $2.35, influenced by prior disclosures regarding share acquisitions by its Executive Chairman [4] - Zai Lab Limited (ZLAB) rose 5.60% to $18.30, reflecting ongoing investor interest in international biotech firms [5] - LifeMD, Inc. (LFMD) added 3.15% to $3.60, with no corporate updates released [5] - Werewolf Therapeutics, Inc. (HOWL) climbed 3.58% to $0.67, indicating speculative interest in smaller-cap biotech stocks [6] - Corvus Pharmaceuticals, Inc. (CRVS) increased by 7.24% to $7.85, extending its upward momentum without any new announcements [6]