Home › Organisations › Maximus, Inc. Maximus, Inc. is a professional services 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 Hawaii Office of Consumer Protection breach-notice list and the Delaware Attorney General data security breach database with 6 confirmed incidents (7 filings); the most recent notice was filed on August 26, 2023.
Headquarters Tysons, United States LEI 549300DQCDS8HJ7QF202 Wikidata Q6795931 Data as of October 27, 2026.
Confirmed incident Filed in HI, WA and DE — Unauthorized Access/Disclosure The same incident was filed separately with 3 jurisdictions within a few days of each other (HI, WA and DE) — shown here as one incident.
Occurred May 27, 2023 Disclosed August 26, 2023 Timeline August 25, 2023
Reported to regulator Regulator WA AG breach notification: 70,847 Washington residents affected
source August 25, 2023
Reported to regulator Regulator DE AG breach notification: 14,158 Delaware residents affected
source August 25, 2023
Reported to regulator Regulator DE AG breach notification: 14,158 Delaware residents affected
source August 25, 2023
Reported to regulator Regulator DE AG breach notification: 14,158 Delaware residents affected
source August 25, 2023
Reported to regulator Regulator DE AG breach notification: 14,158 Delaware residents affected
source August 26, 2023
Reported to regulator Regulator HI AG breach notification: 2,807 Hawaii residents affected
source Litigation Possible litigation — multiple candidate dockets found, not yet resolved to a single case. Possible litigation — multiple candidate dockets found, not yet resolved to a single case. What a Hawaii notice means Governed by HRS §487N-2 . Notice to the Office of Consumer Protection is required when a breach affects 1,000 or more Hawaii residents.
Note: the count is Hawaii residents only, not a total.
Hawaii breach-notification register ↗
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 ↗
Disclosed July 28, 2023 Timeline July 28, 2023
Reported to regulator Regulator MA AG breach notification: 58,800 Massachusetts residents affected
source Litigation Possible litigation — multiple candidate dockets found, not yet resolved to a single case. 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 October 28, 2022 Timeline October 28, 2022
Reported to regulator Regulator MA AG breach notification: 13 Massachusetts residents affected
source Litigation Possible litigation — multiple candidate dockets found, not yet resolved to a single case. Disclosed June 23, 2021 Timeline June 23, 2021
Reported to regulator Regulator MA AG breach notification: 2,531 Massachusetts residents affected
source Litigation Possible litigation — multiple candidate dockets found, not yet resolved to a single case. Confirmed incident Filed in WA and CA — Unauthorized Access/Disclosure The same incident was filed separately with 2 jurisdictions within a few days of each other (WA and CA) — shown here as one incident.
Occurred May 17, 2021 Disclosed June 18, 2021 Timeline June 18, 2021
Reported to regulator Regulator WA AG breach notification: 2,560 Washington residents affected
source June 23, 2021
Reported to regulator Regulator CA AG breach notification: an unknown number of California residents affected
source Litigation Possible litigation — multiple candidate dockets found, not yet resolved to a single case. 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 ↗
Unverified claim US — Ransomware Attack This is an unverified claim — it has allegedly happened to this organisation, as posted by a source below, but has not been confirmed by a regulator, a court filing or the organisation’s own disclosure.
Timeline July 26, 2023
Claimed by threat actor (unverified) Claim Ransomware leak-site claim (ransomware_live)
source