Columbia University
17 disclosures across 16 jurisdictions · 2025-08-01 → 2026-05-20. Severity score: 8 across 2 incidents (max per incident: crit=4 high=3 med=2 low=1; per-filing sum: 46).
1825-day window · this entity as victim
apparent from filed dates · see trail
of 5 clock verdicts
max per incident · per-filing sum: 46
Sector context · Education
- This entity:
- 60.0% on-time (n=5 clock verdicts)
- Sector cohort:
- 30.4% on-time (n=899 clock verdicts)
Cohort: 2,352 filings from 883 organisations carrying NAICS 61 on the filing itself, same 1825-day window; merged entities counted once. Both percentages count clock verdicts through the same registry — a filing with no evaluable clock is excluded from both rather than counted as on time.
Compliance timing by regulator
Notice timing computed from the dates recorded in each filing — an indicative estimate from an automated clock, not a legal determination. Click any chip for this entity's source filings.
- Maine1 on-time · 0 late · 1 informational · 2
- Texas0 on-time · 1 late · 1 informational · 2
- Massachusetts0 on-time · 0 late · 1 informational · 1
- Vermont0 on-time · 1 review · 0 late · 1
- Oregon1 on-time · 0 late · 1
- Iowa1 on-time · 0 late · 1
us-ca — clock not computable from the dates recorded in the filings
us-de — no notification-clock framework implemented for this jurisdiction
us-il — no notification-clock framework implemented for this jurisdiction
us-in — no notification-clock framework implemented for this jurisdiction
us-mt — no notification-clock framework implemented for this jurisdiction
us-ne — no notification-clock framework implemented for this jurisdiction
us-nh — no notification-clock framework implemented for this jurisdiction
us-ri — clock not computable from the dates recorded in the filings
us-sc — no notification-clock framework implemented for this jurisdiction
us-wa — clock not computable from the dates recorded in the filings
Discovery dates behind these clocks: 4 ag web form · 5 letter-grounded · 1 notification date · 5 unattributed. Only a date the notification letter itself states is fully defensible; a date derived from another field makes the verdict indicative.
Regulators holding filings from this entity
Every regulator that has received a visible filing naming this entity, all time — filings first.
- Massachusetts State AG (6)
- New Hampshire State AG (4)
- California State AG (1)
- Delaware State AG (1)
- Iowa State AG (1)
- Illinois State AG (1)
- Indiana State AG (1)
- Maine State AG (1)
- Montana State AG (1)
- Nebraska State AG (1)
- Oregon State AG (1)
- Rhode Island State AG (1)
- South Carolina State AG (1)
- Texas State AG (1)
- Vermont State AG (1)
- Washington State AG (1)
Breach History (5-Year Lookback)
Historical incident recurrence, cumulative exposure, and per-jurisdiction compliance record
within lookback window
late notice filings
median days between incidents
Per-jurisdiction compliance record
| Jurisdiction | On-time | Late | Rate |
|---|---|---|---|
| us-ia | 1 | 0 | 100% |
| us-ma | 0 | 0 | — |
| us-me | 1 | 0 | 100% |
| us-or | 1 | 0 | 100% |
| us-tx | 0 | 1 | 0% |
| us-vt | 0 | 1 | 0% |
Cumulative data type exposure
Disclosure timeline
Most-recent 100 filings. Click a row to open the disclosure detail.
| Filed | Source | Jurisdiction | Severity | Affected | Clocks missed |
|---|---|---|---|---|---|
| 2026-05-20 | state_ag | us-tx | Critical | 3.1M | TX AG >30d· discovery date: ag web form |
| 2026-05-07 | state_ag | us-nh | High | 11.1Kstate | |
| 2025-08-26 | state_ag | us-ri | High | 2.5Kstate | |
| 2025-08-12 | state_ag | us-nh | High | 2.3Kstate | |
| 2025-08-08 | state_ag | us-ia | High | 1.6Kstate | |
| 2025-08-07 | state_ag | us-me | Critical | 869.0K | |
| 2025-08-07 | state_ag | us-ma | High | 28.1Kstate | |
| 2025-08-07 | state_ag | us-wa | High | 54.1Kstate | |
| 2025-08-07 | state_ag | us-in | High | 869.0K | |
| 2025-08-07 | state_ag | us-ne | Medium | — | |
| 2025-08-07 | state_ag | us-de | Medium | — | |
| 2025-08-07 | state_ag | us-mt | Medium | 686state | |
| 2025-08-07 | state_ag | us-vt | Medium | — | VT AG >14 bday· discovery date: unattributed |
| 2025-08-07 | state_ag | us-ca | Medium | — | |
| 2025-08-07 | state_ag | us-sc | Medium | — | |
| 2025-08-07 | state_ag | us-or | High | 869.0K | |
| 2025-08-01 | state_ag | us-il | Medium | — |