Material Event Form 8 K

On July 9, 2024, Repligen Corporation (the "Company") discovered that an unauthorized third party had accessed certain files on the Company's information systems. Upon this discovery, the Company immediately activated response procedures to investigate, contain, and remediate the incident and also notified law enforcement, in accordance with the Company's established protocols. The Company has engaged external cybersecurity experts to assist with the investigation and other response activities. As of the date of this report, other than the Company's response and remediation activities, the incident has not had an impact on the Company's business or operations. The Company's ability to serve customers has also not been impacted, and its information systems remain operational and undisrupted. Further, the Company does not anticipate that this incident will have a material impact on its financial condition or results of operations. While the Company believes it has contained the incident and that no systems were encrypted by malware, it continues to investigate this matter to determine the full extent of the impact on the Company, including what, if any, regulatory and legal notifications the Company will need to make as a result of this matter.

Forward-Looking Statements

This report contains "forward-looking statements" within the meaning of federal securities laws, including the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Any statements contained herein which do not describe historical facts, including, statements regarding plans, expectations and beliefs about the incident, the Company's incident response, the scope and impact of the incident on the Company's systems, customers, financial condition or results of operations, and the Company's investigation, containment and remediation efforts, are forward-looking statements based on management's current expectations and beliefs and involve risks and uncertainties that could cause actual results to differ materially from those discussed in such forward-looking statements, including the risk that the Company's has underestimated the scope of or impacts from the incident, the possibility that containment and remediation efforts may not be successful and other risk and uncertainties contained in the documents filed by the Company with the Securities and Exchange Commission. The Company cautions you not to place undue reliance on any forward-looking statements, which speak only as of the date they are made and the Company disclaims any obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.