In re T-Mobile Customer Data Security Breach Litigation (2021) data breach case

US District Court, Western District of Missouri · 4:21-md-03019 · filed Dec 3, 2021 · Settled

Consolidated suits over the 2021 cyberattack that exposed personal data of about 76 million people.

The case

Plaintiffs: Consumer class plaintiffs
Defendants: T-Mobile US, Inc.
Court: US District Court, Western District of Missouri
Docket: 4:21-md-03019
Filed: Dec 3, 2021
Status: Settled
Outcome: T-Mobile agreed to pay USD 350 million into a settlement fund and spend USD 150 million on data security.
Amount: $350 million

2 dated entries

Date	Entry	Type	Source
Jan 16, 2025	Ruling: ORDER AND JUDGMENT Granting Attorneys' Fees and Incentive Award ORDERED Plaintiffs' Amended Motion for Attorneys' Fees 253 is GRANTED. Plaintiffs shall be awarded attorneys' fees i	Ruling	Link
Dec 3, 2021	Filing: Complaint filed: In re T-Mobile Customer Data Security Breach Litigation	Filing	Link

When	Case	Kind	Status	Filed
Dec 11, 2025Filed 9mo agofiled	ICO fine: LastPass, 2022 breachDecidedData breachUK Information Commissioner's OfficeGBP 1.2 million	Data breach	Decided	Dec 11, 2025
Aug 13, 2025Filed 13mo agofiled	In re Coinbase Customer Data Security Breach LitigationActiveData breachS.D. N.Y.	Data breach	Active	Aug 13, 2025
Jun 17, 2025Filed 15mo agofiled	ICO fine: 23andMe, genetic data breachDecidedData breachUK Information Commissioner's OfficeGBP 2.31 million	Data breach	Decided	Jun 17, 2025
Apr 8, 2025Filed 18mo agofiled	In re PowerSchool Customer Data Security Breach LitigationActiveData breachS.D. Cal.	Data breach	Active	Apr 8, 2025
Jan 15, 2025Filed 20mo agofiled	FTC: GoDaddy, hosting securitySettledData breachUS Federal Trade Commission	Data breach	Settled	Jan 15, 2025
Dec 17, 2024Filed 21mo agofiled	DPC fine: Meta, 2018 Facebook breachDecidedData breachIrish DPCEUR 251 million	Data breach	Decided	Dec 17, 2024
Oct 9, 2024Filed 24mo agofiled	FTC: Marriott and Starwood, data breachesSettledData breachUS Federal Trade Commission	Data breach	Settled	Oct 9, 2024
Oct 8, 2024Filed 24mo agofiled	In re Snowflake Data Security Breach LitigationActiveData breachD. Mont.	Data breach	Active	Oct 8, 2024

Caption and links

In re T-Mobile Customer Data Security Breach Litigation