---
license: other
license_name: tensorust-sample-license
license_link: https://tensorust.com/datasets/data-breach-notices/
pretty_name: "Corporate Data Breach Notices (free sample)"
language:
- en
tags:
- tensorust
- sample
- compliance-and-sanctions
- government-data
- finance
size_categories:
- n<1K
configs:
- config_name: sample
  data_files:
  - split: train
    path: sample.csv
- config_name: summary
  data_files:
  - split: train
    path: summary_by_industry.csv
---

# Corporate Data Breach Notices: free sample (Tensorust LLC)

Every breach notice filed with the California and Washington Attorneys General, by company, with repeat notifiers flagged.

**Headline:** State law makes companies tell the Attorney General when residents' data is breached, yet no regulator publishes one cross-state view by company.

This repository is a **free teaser**, not the dataset. It holds 25 example rows and a summary table with no names in it. The full file has **7,045 rows** and is sold by Tensorust LLC: **[https://tensorust.com/datasets/data-breach-notices/](https://tensorust.com/datasets/data-breach-notices/)**.

## Files here

| file | what it is |
|---|---|
| `sample.csv` | 25 rows of the full file (the same sample shown on tensorust.com) |
| `summary_by_industry.csv` | row counts and totals by industry across the full file, no entity names (groups with fewer than 3 rows are folded into "Other") |

## Summary by industry (largest groups)

| Industry | rows | Residents affected |
|---|---|---|
| (blank) | 5,372 | 0 |
| Business | 756 | 17,402,851 |
| Health | 332 | 13,378,577 |
| Finance | 265 | 7,854,940 |
| Education | 137 | 2,913,925 |
| Non-Profit/Charity | 125 | 3,684,697 |
| Government | 58 | 4,190,695 |
| TOTAL | 7,045 | 49,425,685 |

Full table: `summary_by_industry.csv`.

## What the full file has

- 7,045 rows
- Key fields: organization, org_key, state_ag, reported_date, breach_dates, breach_start, residents_affected, breach_cause, attack_type, industry
- Parquet and CSV, a README with sources, method and limits, and the build script
- Free 25-row sample (no personal contact data)

Coverage: California notices since 2012 and Washington notices since 2016; 7,045 notices. Downloaded Nov 6, 2026; both lists update as notices are posted.

### Columns in the full file

| column | meaning |
|---|---|
| `organization` | Breached organization as named in the notice |
| `org_key` | Tensorust ontology organization key (normalized name) |
| `state_ag` | Attorney General office the notice was filed with (CA or WA) |
| `reported_date` | Date the AG received or posted the notice |
| `breach_dates` | Breach date(s) as given in the notice |
| `breach_start` | First breach date parsed from the notice |
| `residents_affected` | Residents of that state affected (WA notices only; CA does not publish counts) |
| `breach_cause` | Cause as classified by WA AG (cyberattack, unauthorized access, theft, error) |
| `attack_type` | WA attack type (ransomware, phishing, malware) |
| `industry` | WA industry type |
| `business_type` | WA business type |
| `days_to_notify` | WA: days from discovery to notification |
| `notices_all_states` | Notices from this organization across both lists |
| `states_notified` | Which of the two AGs it notified |
| `repeat_notifier` | True when the organization filed 3 or more notices |
| `fed_uei` | UEI of a matching federal award recipient (exact ontology name key) |
| `fed_recipient_name` | Matching USAspending recipient name |
| `fed_obligated_fy25_plus` | Federal obligations to that recipient FY2025 onward (USD) |
| `fed_top_agency` | Top awarding agency |
| `in_ontology` | Organization key exists in the Tensorust ontology |
| `source_url` | Public list the row came from |

## Get the full file

| tier | price | includes |
|---|---|---|
| Breach notice file | $750 | All 7,045 CA and WA AG breach notices as CSV and Parquet, with repeat-notifier flags and the federal-award join. |
| Monthly breach feed | $4,800 a year | The full file refreshed monthly with new notices, plus a monthly list of first-time and repeat notifiers. Up to 5 users. |
| Underwriting license | $18,000 a year | Weekly refresh, internal use across underwriting and claims teams, and the right to load the file into rating and portfolio tools. |

Email **mattbusel@tensorust.com** with the tier and a billing contact, and we will send a proper invoice (ACH or card). The file is delivered once the invoice is paid. Details and the live sample: [https://tensorust.com/datasets/data-breach-notices/](https://tensorust.com/datasets/data-breach-notices/). All datasets: https://tensorust.com/datasets/

## Method and limits

Both public lists are downloaded whole. Names are normalized with the Tensorust ontology key (case, punctuation and trailing legal-form words removed) to count notices per organization across the two states and to join exact-key matches to federal award recipients (USAspending obligations FY2025 onward). Duplicate rows (same organization, state and date) are dropped. repeat_notifier marks 3 or more notices.

Not a list of breached individuals (no personal data from the notices is included). Not a full national count: other states are not yet included, and California does not publish record counts. A federal-recipient match is an exact normalized-name match, not a verified corporate link. Not legal advice.

## Sources

- California Attorney General data breach list, CSV export: https://oag.ca.gov/privacy/databreach/list
- Washington Attorney General data breach notifications (data.wa.gov sb4j-ca4h): https://data.wa.gov/api/views/sb4j-ca4h/rows.csv?accessType=DOWNLOAD
- Washington AG notification page: https://www.atg.wa.gov/data-breach-notifications
- USAspending.gov recipients FY2025 onward via the Tensorust ontology: https://www.usaspending.gov/

## License

The sample and summary here are free to view, analyze and cite with attribution to "Tensorust LLC, https://tensorust.com/datasets/data-breach-notices/". The full dataset is licensed separately per tier. No resale or redistribution of Tensorust data without a written license.

Tensorust LLC, Tuckahoe NY. mattbusel@tensorust.com | https://tensorust.com