BreachCensus

Cornerstone, Inc.

United States of America

Cornerstone, Inc. is an organisation in Massachusetts. It appears on the Massachusetts Attorney General breach-notification register and the Wisconsin DATCP data breach list with 1 confirmed incident (2 filings); the most recent notice was filed on August 22, 2019.

Data as of September 6, 2026.

Confirmed incident

Filed in MA and WI

The same incident was filed separately with 2 jurisdictions within a few days of each other (MA and WI) — shown here as one incident.

Disclosed
August 22, 2019

Timeline

  1. August 19, 2019
    Reported to regulator Regulator

    WI AG breach notification: an unknown number of Wisconsin residents affected

    source
  2. August 22, 2019
    Reported to regulator Regulator

    MA AG breach notification: 4 Massachusetts residents affected

    source
What a Massachusetts notice means

Governed by M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗

What a Wisconsin notice means

Governed by Wis. Stat. §134.98. No state agency must be notified. Affected individuals must be told within 45 days, and the national credit bureaus too when 1,000 or more people are notified; DATCP lists breaches reported to it or found to affect Wisconsin consumers.

Note: the count is Wisconsin residents only when published, not a total; many notices do not include one.

Wisconsin breach-notification register ↗