Regulator-posted notice

Breach notice filed by Sierra Construction Company, Inc. (October 2024)

Organization named: Sierra Construction Company, Inc. Provisional: identity as filed, not yet matched to the directory

What the sources say

Washington Attorney General data breach notifications Primary notice

Posted on the Washington Attorney General data breach notifications with a submission date of Oct. 30, 2024.

Organization as reported: Sierra Construction Company, Inc.
Information types as reported: Name; Social Security Number; Driver's License or Washington ID Card Number; Full Date of Birth; Passport Number; Health Insurance Policy or ID Number; Other
Incident dates as reported: Aug. 13, 2024
Submission date: Oct. 30, 2024
Observed by BreachRecords: 2026-10-19 04:56 UTC (revision 25537, page:8:row:44)
Archived copy: Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Washington data breach notifications dataset (data.wa.gov sb4j-ca4h) Duplicate filing

Posted on the Washington data breach notifications dataset with a submission date of Oct. 30, 2024.

Organization as reported: Sierra Construction Company, Inc., WA
Entity type as reported: Business
Category as reported: Cyberattack; Ransomware
Incident dates as reported: Aug. 13, 2024 to Aug. 14, 2024
Discovery date as reported: Aug. 14, 2024
Submission date: Oct. 30, 2024
Observed by BreachRecords: 2026-11-01 20:03 UTC (revision 63559, row:1275)
Extraction: Parsed from a document; extraction confidence 0.85
Archived copy: Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Figures, per source

1,103 individuals affected (residents of the reporting state), according to the Washington Attorney General data breach notifications, source date Oct. 30, 2024, revision observed 2026-10-19.
1,103 individuals affected (residents of the reporting state), according to the Washington data breach notifications dataset, source date Oct. 30, 2024, revision observed 2026-11-01.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

2024-10-30Submission date (Washington Attorney General data breach notifications)
2024-10-30Submission date (Washington data breach notifications dataset)
2026-10-19Observed by BreachRecords (revision 25537)
2026-11-01Observed by BreachRecords (revision 63559)
2026-11-04Approved by a reviewer

Organizations linked by a reviewer

Sierra Construction Company, Inc. Named as the filer Provisional: identity as filed, not yet matched to the directory Linked 2026-11-04, method manual.

Archived evidence

264d45f73831ec8fc298837002b836f792a7cfd7f3d6b4d2128484a23223c042
text/csv, 453,656 bytes, retrieved from Washington data breach notifications dataset, 2026-11-01 20:03 UTC. Archived privately · Provenance · Source page
a60958c0fc9f817cfd6a8301ab1c37edf1f7ed13eb7c4b3defa7e964d8d96c99
text/html, 155,789 bytes, retrieved from Washington Attorney General data breach notifications, 2026-10-19 04:56 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

Request a correction

A record that disagrees with its source, names the wrong organization or duplicates another is corrected after review. This form is about Breach notice filed by Sierra Construction Company, Inc. (October 2024). We acknowledge every request within two business days. We reply by email.

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