SCHEDULE 13G/A

REPLIGEN CORP COM

Common Stock, $.01 par value per share · CUSIP: 759916109

Event date: 2025-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Roy T. Eddleman Living Trust

  Shares: 2,705,689.00 · Class: 4.81%

• Roy T. Eddleman Charitable Remainder Trust #1

  Shares: 29,604.00 · Class: 0.001%

• Roy T. Eddleman Charitable Remainder Trust #2

  Shares: 0.00 · Class: 0.00%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.