Quest Diagnostics, US74834L1008

Quest Diagnostics stock heads into the open after closing at USD 234.76

Published on 09/24/2026 at 03:57 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

At the close on September 23, 2026, Quest Diagnostics stock stood at USD 234.76. The S&P 500 fell 0.8 percent to 7,706.03, while the company had gained 35.1 percent year to date.

Automatisierter Laboranalysator mit Blutproben-Röhrchen in klinischem Diagnostiklabor
Quest Diagnostics US74834L1008 zeigt automatisierten Laboranalysator mit Blutproben in modernem Diagnostiklabor fotorealistisch dargestellt, Illustration mit AI erstellt.

Quest Diagnostics stock closed at USD 234.76 on the NYSE on September 23, 2026. The S&P 500 fell 0.8 percent to 7,706.03 in the same session, providing the clearest quantified market comparison.

September 23, 2026 in numbers

Quest Diagnostics Incorporated (ISIN US74834L1008, NYSE: DGX) closed at USD 234.76 on the NYSE on September 23, 2026. The stock had gained 35.1 percent year to date, while its one-month return had slipped 3.9 percent, according to Yahoo Finance.

The broader market weakened during the session: the S&P 500 fell 0.8 percent to 7,706.03, the Dow Jones Industrial Average declined 0.7 percent to 51,511.59, and the Nasdaq Composite lost 1.1 percent to 26,936.04, as reported by ABC News.

October 22, 2026 results date

The next quarterly results are scheduled for October 22, 2026, according to PR Newswire. The company also drew attention after announcing an Apple Health integration, while Yahoo Finance reported a USD 119 preventive lab panel and a USD 247.40 fair-value narrative; those figures were discussed in the September 23 article.

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