Quest Diagnostics reported a quarterly earnings per share of $2.30, exceeding estimates, with revenue of $2.49 billion, an 8.5% year-over-year increase. The company announced a quarterly dividend of $0.75 per share, reflecting a 1.84% yield, and insider activity showed significant stock sales by executives. The stock opened at $162.75, with a market cap of $18.16 billion and a P/E ratio of 21.88.