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REPLIGEN CORP

For the period ended Sep 30, 2025. Filed Nov 4, 2025.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2025 · Filed Nov 4, 2025

RGEN$178.94+3.1%Stored close · as of Nov 9, 2026

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Item 5. Other Information

(a)None.

(b)None.

(c) Rule 10b5-1 Trading Plans

On August 19, 2025, Olivier Loeillot, President and Chief Executive Officer, adopted a trading plan intended to satisfy Rule 10b5-1 under Item 408 of Regulation S-K, to sell up to 43,411 shares of our common stock between December 15, 2025 and December 15, 2026. The trading plan will cease upon the earlier of December 15, 2026 or the sale of all shares subject to the trading plan.

Other than those disclosed above, none of our directors or officers adopted, modified orterminateda Rule 10b5-1 trading arrangement during the three months ended September 30, 2025.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.