Amphastar Pharmaceuticals, Inc.

Amphastar Pharmaceuticals, Inc. notified California AG on Aug 28, 2020 of a data breach, which occurred on May 2, 2020. Data exposed: Social Security number, Financial / bank account, Medical / health information, Health insurance, Usernames / passwords, Email address, Biometric data, Postal address, Name.

Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: Amphastar Pharmaceuticals, Inc.
Source: California AG · source record
Date reported: Aug 28, 2020
Date(s) of breach: Saturday, May 2, 2020
Residents affected: Not published by this source
Data exposed: Social Security number Financial / bank account Medical / health information Health insurance Usernames / passwords Email address Biometric data Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Jul 24, 2020, as stated in the letter
"On July 24, 2020, the Company learned for the first time that some Company data had been posted on the internet without authorization on July 21."
Days to notice: 35 days from discovery (Jul 24, 2020) to the California record (Aug 28, 2020). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter: 24 months of credit or identity monitoring through Experian
First seen by BreachTally: 2026-10-30 16:09 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

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Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.