About Cytek Biosciences, Inc.
Cytek Biosciences, Inc., located in Fremont, California, is a commercial entity that recently reported a data breach. The breach involved unauthorized access to their systems, leading to the compromise of personal information. This incident affected a total of 331 individuals, including one resident of Maine. The breach was discovered on November 28, 2025, after occurring on November 1, 2025.
What Happened
Cytek Biosciences, Inc. (“Cytek”) experienced a data security incident involving unauthorized access to certain of our systems that occurred on or around November 1, 2025. Based on our investigation, we learned on or around November 28, 2025, that, in connection with this issue, an unauthorized party obtained certain of your personal information.
The breach involved an external system hacking, and those affected included Cytek employees and potentially other individuals whose personal data was stored in the compromised systems. The breach occurred on November 1, 2025.
Next Steps
Affected individuals should remain vigilant by reviewing their account statements and monitoring free credit reports for any suspicious activity. It is advisable to be cautious of unsolicited communications requesting personal information and to avoid clicking on links or downloading attachments from suspicious emails. Additionally, changing passwords for accounts using similar credentials to those of the compromised Cytek accounts is recommended. Affected individuals can obtain a free credit report annually from each of the three nationwide consumer reporting agencies.
Identity Theft Protection Services
Cytek Biosciences is offering 24 months of complimentary identity protection services and credit monitoring through Experian IdentityWorks. This service includes identity restoration support and fraud detection tools to help detect misuse of personal information. Enrollment is required by April 30, 2026, to activate the 24-month membership. The services also include access to Experian credit reports at signup, daily credit monitoring, and $1 million identity theft insurance. Affected individuals are encouraged to utilize these services to safeguard their personal information.