3M (MMM) Stock: What to Know Before the U.S. Market Opens on Monday, Dec. 15, 2025
As U.S. investors head into Monday’s open (December 15, 2025), 3M Company (NYSE: MMM) is entering the week with two storylines in focus: a high-profile analyst downgrade after a powerful rally, and a turnaround narrative under CEO William “Bill” Brown that’s increasingly being judged on valuation rather than credibility. Shares were around $168.90 in the latest available quote heading into the new week. Below is what’s driving sentiment right now—and what to watch before the opening bell. Where 3M stock stands heading into Monday’s session The most market-moving headline in early December was Deutsche Bank’s downgrade to “Hold” from “Buy,”