Quest Diagnostics stock heads into the open after a 1.6 percent gain

At the close on September 14, 2026, Quest Diagnostics stock ended at USD 185.38 on the New York Stock Exchange, up 1.6 percent. The S&P 500 fell 0.5 percent to 7,619.98, while Quest Diagnostics was discussed at the Morgan Stanley conference.

Quest Diagnostics stock ended at USD 185.38 on the New York Stock Exchange on September 14, 2026, up 1.6 percent. The move came as the S&P 500 fell 0.5 percent to 7,619.98, leaving the shares ahead of the broader market by 2.1 percentage points.

September 14, 2026 in numbers

Quest Diagnostics Inc. (ISIN US74834L1008) moved in a session range of USD 183.90 to USD 186.12 and traded 1.42 million shares. The close sat 3.4 percent below the 52-week high of USD 191.85 and 18.2 percent above the 52-week low of USD 156.99.

As Investing.com reported on September 14, 2026, Quest Diagnostics told the Morgan Stanley 24th Annual Global Healthcare Conference that growth had broadened, while management also pointed to slower growth ahead from health exchange disenrollments and partnership lapping.

Today

Quest Diagnostics is not due to report results today, and the main scheduled item in the near term is the company's appearance at the Morgan Stanley conference already reflected in the last session. The stock also enters today's session with the same broad U.S. market backdrop that left major indexes mixed on September 14, 2026.