Home › Organisations › Ernst & Young LLP Ernst & Young LLP is an organisation in Massachusetts. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register, the Washington State Attorney General breach-notification register, the Texas Attorney General breach-notification register, the Vermont Attorney General breach-notification register and the Delaware Attorney General data security breach database with 3 confirmed incidents (5 filings); the most recent notice was filed on July 17, 2026.
Data as of October 17, 2026.
Confirmed incident Filed in TX, CA, VT and MA The same incident was filed separately with 4 jurisdictions within a few days of each other (TX, CA, VT and MA) — shown here as one incident.
Occurred March 28, 2026 Disclosed July 17, 2026 Records affected 10,895 Was I affected? →
Timeline July 15, 2026
Reported to regulator Regulator CA AG breach notification: an unknown number of California residents affected
source July 15, 2026
Reported to regulator Regulator MA AG breach notification: 480 Massachusetts residents affected
source July 16, 2026
Reported to regulator Regulator VT AG breach notification: 13 Vermont residents affected
source July 17, 2026
Reported to regulator Regulator TX AG breach notification: 873 Texas residents affected
source What a Texas notice means Governed by Tex. Bus. & Com. Code §521.053 . Notice to the Attorney General is required when a breach affects at least 250 Texas residents.
Note: the published count is a total, not limited to Texas residents.
Texas breach-notification register ↗
What a California notice means Governed by Cal. Civ. Code §1798.82 . A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.
Note: no affected-count is published on this register.
California breach-notification register ↗
What a Vermont notice means Governed by 9 V.S.A. §2435 . Notification to the Attorney General is required.
Note: the count is Vermont residents.
Vermont breach-notification register ↗
What a Massachusetts notice means Governed by M.G.L. c. 93H . Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.
Note: the count is Massachusetts residents only, not a total.
Massachusetts breach-notification register ↗
Disclosed May 18, 2026 Timeline May 18, 2026
Reported to regulator Regulator MA AG breach notification: 1 Massachusetts residents affected
source Confirmed incident Filed in WA, CA, DE and MA — Hacking/IT Incident The same incident was filed separately with 4 jurisdictions within a few days of each other (WA, CA, DE and MA) — shown here as one incident.
Occurred May 27, 2023 Disclosed August 9, 2023 Timeline August 9, 2023
Reported to regulator Regulator MA AG breach notification: 7,320 Massachusetts residents affected
source August 9, 2023
Reported to regulator Regulator WA AG breach notification: 1,129 Washington residents affected
source August 9, 2023
Reported to regulator Regulator CA AG breach notification: an unknown number of California residents affected
source August 9, 2023
Reported to regulator Regulator DE AG breach notification: 2,048 Delaware residents affected
source August 9, 2023
Reported to regulator Regulator DE AG breach notification: 2,048 Delaware residents affected
source August 9, 2023
Reported to regulator Regulator DE AG breach notification: 2,048 Delaware residents affected
source July 1, 2024
Reported to regulator Regulator CA AG breach notification: an unknown number of California residents affected
source What a Washington notice means Governed by RCW 19.255.010 . Notice to the Attorney General is required when a breach affects more than 500 Washington residents.
Note: the count is Washington residents only, not a total.
Washington breach-notification register ↗
What a Delaware notice means Governed by 6 Del. C. §12B-102 . Notice to the Attorney General is required when a breach affects more than 500 Delaware residents.
Note: the count is Delaware residents only, not a total.
Delaware breach-notification register ↗