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/.
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/. 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