T-MOBILE USA, INC. — September 2015 breach

Clustered 7 filings across 6 jurisdictions · filing window Oct 1, 2015 → Nov 4, 2015. View entity profile → Other incidents for this victim →

⚠ 1 cross-filing discrepancy →Merge100%

Determination

Confirmed

Members

7 filings

States

Affected · reported

15,100,000

First → last filing

Oct 1, 2015 → Nov 4, 2015

Merge confidence

100%

incident inc_cacee14fccc84ae7 · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 7 regulatory filings. The filings describe hacking. Intrusion Sep 14, 2015, discovered Sep 15, 2015 — the first regulatory filing landed 16 days later. 15,100,000 individuals reported across the linked filings. Data reported: Government ID, Identity (basic), PII, and 2 more. Notifications rolled out on a 34-day schedule across 7 filings beginning Oct 1, 2015. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental

Notification delay

16days

Discovered → first regulatory filing

Discovery variance

0days

Range of discovered_at dates across filings

Filing span

34days

Time between earliest and latest filing

Not recorded for this incident

Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.

Regulatory clocksCalifornia✓ CA 60-day OK · 17dOregon✓ OR AG ≤45dFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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