South32 Ltd (ASX: S32) Stock: Buyback Shrinks Share Count, Hermosa Water Probe Grabs Headlines, and What to Watch This Week (Updated 14 Dec 2025)
South32 Ltd stock (ASX: S32) heads into the new trading week with a busy mix of catalysts: an ongoing on‑market share buyback, a newly completed divestment in Colombia, boardroom changes, and fresh scrutiny around the company’s Hermosa project in Arizona.