NK cell therapy, a promising cancer treatment, sees robust R&D with 140+ companies developing 160+ therapies. Key players include Amgen, Innate Pharma, Nektar Therapeutics, and others. Promising therapies like Bemarituzumab, Monalizumab, and NKTR-225 are in various clinical phases. Recent milestones include Immunitybio's CAR-NK cell therapy for NHL, Nkarta's NKX019 for AAV, and KGen Biotech's SNK01 advancing to Phase II.