Merck & Co., Inc. Market Cap

Data as of June 01, 2026

How It's Calculated

What This Means

Merck & Co., Inc. has a market capitalization of $293.22B, classifying it as Mega Cap — one of the largest companies in the world. Market cap represents the total value of all outstanding shares and is a key indicator of a company's size.

About Merck & Co., Inc.

Merck & Co., Inc. (MRK) operates in the Healthcare sector, specifically in Drug Manufacturers - General. With a market capitalization of about $293.22B, it ranks as a mega-cap stock — one of the largest publicly traded companies.

Shares recently traded near $118.72, within a 52-week range of $75.40 to $125.14 (-5.1% from the high, +57.5% from the low). Beta of 0.20 indicates relatively lower volatility versus the market.

Trailing profit margin is about 13.6%, signaling a solid profit margin for its industry.

Understanding This Metric

Market capitalization sums the market value of all outstanding shares. It helps classify Merck & Co., Inc. by size — mega-cap, large-cap, and mid-cap stocks tend to have different liquidity, volatility, and index inclusion profiles. Size alone does not determine quality, but it frames risk and how widely the stock is held.

Sector Comparison

Among Healthcare names on our S&P 100 coverage, Merck & Co., Inc.'s market cap of $293.22B can be compared with peers such as LLY ($985.37B), JNJ ($542.42B), UNH ($345.38B). Sector context helps interpretation, but each company's growth profile and balance sheet differ — use multiple metrics before drawing conclusions. View all Healthcare stocks.

Key Takeaways

• MRK is grouped in the Healthcare sector for peer comparisons.
• Recent beta of 0.20 suggests lower-than-market price sensitivity.
• Trailing profit margin of 13.6% provides context for how much earnings support the headline multiple.

Related Tools & Guides

Explore calculators and guides connected to this metric, or view all metrics for MRK.

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