McKesson Discloses Cybersecurity Incident, Says Impact Not Yet Determined
Market cap : at edition (Aug 28, 2026) $103.8BMcKesson, the pharmaceutical distributor with $403 billion in annual revenues, disclosed on August 25, 2026 that it had discovered a cybersecurity incident affecting its information systems. The company filed voluntarily under Regulation FD on the same day the incident was found — before any materiality determination was required — and stated that as of the filing date, it had not concluded the incident was material or reasonably likely to have a material impact on its financial condition or operations. The investigation is described as being in its early stages, with no further operational or technical details provided.