Quest Diagnostics disclosed a cyberattack targeting its Quanum lab testing system, which handles patient test requests and billing. The breach exposed sensitive patient health and billing information, though the exact scope and number of affected records remain unclear. Quest is investigating and has notified law enforcement, but has not revealed if ransom demands were made. This incident adds to a series of recent cyberattacks on healthcare companies, highlighting ongoing risks to sensitive medical data.
Quest Diagnostics, with a market cap of $26.85 billion and a dividend yield of 1.41%, is a significant player in the health sector. As of Oct 23, 2026, 22:11 WIB, its stock price on Pluang stands at USD 242.24, down 0.54% for the day. The company’s shares have a typical hold time of 57 days on Pluang, indicating moderate investor interest amid ongoing cybersecurity concerns in healthcare.
