REPLIGEN CORP

The matters discussed in this Quarterly Report on Form 10-Q (“Form 10-Q”) include forward-looking statements that involve risks or uncertainties. These statements are neither promises nor guarantees, but are based on various assumptions by management regarding future circumstances, over many of which Repligen has little or no control. A number of important risks and uncertainties, including those identified under the caption“Risk Factors” in Part I, Item 1A of our Annual Report on Form 10-K for the period ended December 31, 2023 (“Form 10-K”) and in subsequent filings, could cause our actual results to differ materially from those in the forward-looking statements.

As contemplated in Item 1A, entitled “Risk Factors,” in the Company's Form 10-K, the Company has in the past and may in the future experience data security incidents. If successful, these attacks could affect service reliability and threaten the confidentiality, integrity, and availability of information. The Company is updating the risk factor captioned”Our internal computer systems, or those of our customers, collaborators or other contractors, may be subject to cyber-attacks or security breaches, which could result in a material disruption of our product development programs”to reference the following incident:

As described on the Current Report on Form 8-K filed on July 15, 2024, on July 9, 2024, the Company discovered that an unauthorized third party had accessed certain files on the Company’s information systems. Based on information currently known as of the date of this Form 10-Q and management’s current assessment of quantitative and qualitative factors (including reputational harm, adverse impacts on relationships with vendors, customers and other business partners, and the impact of the foregoing on the Company’s stockholders), the Company does not believe this incident will have a material impact on its financial condition and results of operations. In addition, as of the date this Form 10-Q other than the Company’s response and remediation activities, the incident has not had an impact on the Company’s business or operations.

Other than the foregoing, there have been no material changes to the risk factors disclosed in Item 1A, entitled “Risk Factors,” in the Company’s Form 10-K.

ITEM 2. UNREGISTERED SALES OF EQUI