Case file: Everside Health
Every government filing on this incident, the dates as stated, and the days to notice against each state's statute. Built from the records on Nov 9, 2026, agency link on every row. Not legal advice.
The incident
- Breach window
- Dec 2, 2025 to Dec 18, 2025
- Discovered
- May 26, 2026, as stated in the California letter
- State and federal records
- 3 filings, Jul 31, 2026 to Aug 4, 2026
- Residents counted
- 23,772 in 2 states (TX, MA), latest filing per state
- Everyone affected
- 1,389,758, as reported to Texas AG on Aug 4, 2026
- Information exposed
- Social Security number, Medical / health information, Date of birth, Postal address
- Offered to those affected
- No monitoring offer found in the letters we read
- Third party named
- No
- Days to notice
- Past the statutory period in all 2 states that set one, counted from discovery to each state's first record
The letter: "After an extensive forensic investigation and manual document review, on May 26, 2026, Aesto confirmed that between on or about December 2, 2025, and December 18, 2025, a limited amount of your protected health information, which was sto..."
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| Texas Texas AG | Aug 4, 2026 | 22,210 | 1,389,758 | 70 days, statute 60 days, over | Record |
| California California AG | Jul 31, 2026 | Not published | 66 days, statute 30 days, over | Letter Record | |
| Massachusetts Massachusetts OCABR | Jul 31, 2026 | 1,562 | 66 days, statute no fixed period | Record |
People is the count the filing gives, residents of the state unless marked total. Days to notice runs from the discovery date the letter states, or from the end of the breach window when no letter states one, to the date on the state's first record of the incident. "Over" marks a count past the days the state's statute allows for notice to residents. The statute's trigger is a question of fact, the days are arithmetic.
Notice timing, state by state
- 70 days from discovery (May 26, 2026) to the Texas record (Aug 4, 2026). Statute: 60 days from determination that the breach occurred (Tex. Bus. & Com. Code § 521.053).
- 66 days from discovery (May 26, 2026) to the California record (Jul 31, 2026). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
- 66 days from discovery (May 26, 2026) to the Massachusetts record (Jul 31, 2026). Statute: no fixed period from knowledge or reason to know of the breach (Mass. Gen. Laws ch. 93H, § 3).
The statutes
- Texas: 60 days to notify residents from determination that the breach occurred, Tex. Bus. & Com. Code § 521.053. Attorney General within 30 days of determination when 250 or more Texas residents are affected.
- California: 30 days to notify residents from discovery or notification of the breach, Cal. Civ. Code § 1798.82. Sample notice to the Attorney General when more than 500 Californians are notified, within 15 days of the consumer notice (effective 2026).
- Massachusetts: no fixed period to notify residents from knowledge or reason to know of the breach, Mass. Gen. Laws ch. 93H, § 3. Attorney General and OCABR as soon as practicable and without unreasonable delay, every breach.
Filings by others that name Everside Health
Clients of a breached vendor often file under their own names and name the vendor.
- Everside Health (Aesto, LLC), Washington, Jul 31, 2026, 21,308
Sources and method
Records as published by Texas AG, California AG, Massachusetts OCABR. Letter facts (discovery date, monitoring, third party) are read from the consumer letter the agency posted, 1 letter read for this incident, and quoted so you can check them. Texas and HHS publish no letters. First-seen times on each record page. Spot an error? Email support@breachtally.com with this page link.