BreachCensus

Regeneron Pharmaceuticals, Inc.

PharmaUnited States of America

Regeneron Pharmaceuticals, Inc. is a pharma organisation in California. It appears on the California Attorney General breach-notification register and the Delaware Attorney General data security breach database with 1 confirmed incident; the most recent notice was filed on May 22, 2024.

Headquarters
Eastview, United States
ISIN
US75886F1075
LEI
549300RCBFWIRX3HYQ56
Wikidata
Q7308054

Data as of October 17, 2026.

Confirmed incident

Filed in CA and DE

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

Occurred
February 21, 2024
Disclosed
May 22, 2024

Timeline

  1. May 22, 2024
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
  2. May 22, 2024
    Reported to regulator Regulator

    DE AG breach notification: 6,367 Delaware residents affected

    source
  3. May 22, 2024
    Reported to regulator Regulator

    DE AG breach notification: 6,367 Delaware residents affected

    source
  4. May 22, 2024
    Reported to regulator Regulator

    DE AG breach notification: 6,367 Delaware residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
What a California notice means

Governed by Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗

What a Delaware notice means

Governed by 6 Del. C. §12B-102. Notice to the Attorney General is required when a breach affects more than 500 Delaware residents.

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

Delaware breach-notification register ↗