Gilead Sciences, Inc. data breach
Incident readout
- Company
- Gilead Sciences, Inc.
- Reported to
- California Attorney General
- Filed
- April 2, 2025
- People affected
- Not stated in the filing
- Incident type in filing
- Not stated
- Our review
- Investigation Open
Was this a ransomware attack?
The filing does not say ransomware was involved. We do not label an incident ransomware unless the company’s report says so. Whatever the cause, the steps to protect yourself and the legal question are the same.
What we know
Gilead Sciences, Inc. is a prominent research-based biopharmaceutical company that discovers, develops, and commercializes innovative medicines. As a leader in the healthcare and life sciences sector, the company maintains highly sensitive personal information, including patient health records, clinical trial data, and prescription-related details. In 2025, the company officially reported a data security incident to the California Attorney General, confirming that unauthorized access to their systems occurred. If you received a formal data breach notification letter from Gilead Sciences, it indicates that your personal or health-related information may have been compromised during this event. This notice serves to inform you of the nature of the incident and the steps the company is taking to address the security of your data.
See every breach reported in California or read what to do after a ransomware attack.
After the Gilead Sciences, Inc. incident: what to do and your options
- What should I do after getting the Gilead Sciences, Inc. data breach notice?
- Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
- Did Gilead Sciences, Inc. offer free credit monitoring?
- Any free monitoring Gilead Sciences, Inc. is offering will be described in the notice you received, along with an activation code and a sign-up deadline. Signing up doesn't waive any legal rights you may have.
- Can I sue Gilead Sciences, Inc. over the data breach?
- It depends on what was exposed, the law in California and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
- Do I need a Gilead Sciences, Inc. data breach lawyer or attorney?
- Whether the company's systems were encrypted by ransomware or data was simply taken, the legal question is the same: did it protect your information the way the law requires? An attorney can review your notice for free, and these cases are usually handled on contingency.
- Is there a Gilead Sciences, Inc. data breach class action lawsuit?
- Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Gilead Sciences, Inc.. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
- Is the Gilead Sciences, Inc. data breach letter legit or a scam?
- A notice from Gilead Sciences, Inc. in the mail matches the breach Gilead Sciences, Inc. reported to the California Attorney General on April 2, 2025. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Gilead Sciences, Inc. through a phone number or website you find yourself.
- How much could a Gilead Sciences, Inc. data breach settlement or claim be worth?
- There is no set amount, and no Gilead Sciences, Inc. settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.
Other breaches reported in California
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- Citizens BankCalifornia Attorney General · Filed October 19, 2026Count not stated
- John G. Yphantides, a Professional Law CorporationCA Attorney General · Filed October 16, 2026Count not stated
- Neuro Wellness SpaCalifornia Attorney General · Filed October 16, 2026Count not stated
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Attorney advertising. This page reflects a public regulator filing; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.