BreachCensus

AMGEN INC

public companyPharmaUnited States of America

AMGEN INC is a pharma organisation in California. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register, the Texas Attorney General breach-notification register, the Vermont Attorney General breach-notification register, the New Hampshire Attorney General breach-notification register, the Delaware Attorney General data security breach database and an SEC 8-K filing with 6 confirmed incidents (7 filings); the most recent notice was filed on August 18, 2026.

Headquarters
Thousand Oaks, United States
Employees
17,900 (as of 2014)
ISIN
US0311621009
LEI
62QBXGPJ34PQ72Z12S66
Wikidata
Q470517

Data as of October 17, 2026.

Confirmed incident

Filed in MA, NH, CA, TX and VT

The same incident was filed separately with 5 jurisdictions within a few days of each other (MA, NH, CA, TX and VT) — shown here as one incident.

“On or about July 2, 2026, Amgen became aware of an unauthorized third party access to certain Amgen systems and data stored in cloud environments hosted by third party cloud service providers.”

Occurred
July 1, 2026
Discovered
July 2, 2026
Disclosed
August 17, 2026
Records affected
39,594

Timeline

  1. August 17, 2026
    Reported to regulator Regulator

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

    source
  2. August 17, 2026
    Reported to regulator Regulator

    VT AG breach notification: 24 Vermont residents affected

    source
  3. August 18, 2026
    Reported to regulator Regulator

    MA AG breach notification: 354 Massachusetts residents affected

    source
  4. August 18, 2026
    Reported to regulator Regulator

    TX AG breach notification: 6,714 Texas residents affected

    source
  5. August 18, 2026
    Reported to regulator Regulator

    NH AG breach notification: an unknown number of New Hampshire residents affected

    source

Litigation

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

Governed by RSA 359-C:20. Notification to the Attorney General is required.

Note: the count is New Hampshire residents.

New Hampshire breach-notification register ↗

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 Texas notice means

Governed by Tex. Bus. & Com. Code §521.053. Notice to the Attorney General is required when a breach affects at least 250 Texas residents.

Note: the published count is a total, not limited to Texas residents.

Texas breach-notification register ↗

What a Vermont notice means

Governed by 9 V.S.A. §2435. Notification to the Attorney General is required.

Note: the count is Vermont residents.

Vermont breach-notification register ↗

Confirmed incident

US

“In July 2026, Amgen Inc. (the "Company") identified unauthorized activity involving data stored in cloud environments hosted by third-party cloud service providers.”

Discovered
July 2026
Disclosed
July 31, 2026

Timeline

  1. July 31, 2026
    Acknowledged by organisation Self-reported

    Form 8-K Item 1.05 filed 2026-07-31

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

Filed in CA and MA

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

Occurred
August 16, 2023
Disclosed
September 25, 2024

Timeline

  1. September 25, 2024
    Reported to regulator Regulator

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

    source
  2. September 25, 2024
    Reported to regulator Regulator

    MA AG breach notification: 73 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

Filed in DE and CA

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

Occurred
February 21, 2024
Disclosed
May 30, 2024

Timeline

  1. May 30, 2024
    Reported to regulator Regulator

    DE AG breach notification: 8,491 Delaware residents affected

    source
  2. May 30, 2024
    Reported to regulator Regulator

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

    source
  3. May 30, 2024
    Reported to regulator Regulator

    DE AG breach notification: 8,491 Delaware residents affected

    source
  4. May 30, 2024
    Reported to regulator Regulator

    DE AG breach notification: 8,491 Delaware residents affected

    source
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 ↗

Confirmed incident

US-CA

Occurred
April 21, 2021
Disclosed
June 22, 2021

Timeline

  1. June 22, 2021
    Reported to regulator Regulator

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

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-CA

Occurred
February 21, 2018
Disclosed
June 26, 2018

Timeline

  1. June 26, 2018
    Reported to regulator Regulator

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

    source
  2. February 21, 2019
    Litigation filed Court

    RECAP docket 1:19-cv-00369 (ded): UFCW Local 1500 Welfare Fund v. Amgen Inc.

    source

Litigation