Does Warren Buffett own Merck stock?

Written by Admin | Last Updated: July 2026

Warren Buffett maintains a massive, multi-billion-dollar equity investment in Moody's Corporation (MCO), representing one of Berkshire Hathaway's longest-standing portfolio cornerstones. Buffett has consistently praised Moody's for its powerful economic moat, essential role in global financial markets, and exceptional pricing power, holding the position through decades of market cycles without selling.

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Merck KGaA, headquartered in Darmstadt, Germany, is the original and oldest pharmaceutical and chemical company in the world, founded in 1668. Conversely, Merck & Co., Inc.