Repligen (RGEN)Officer filed to sell ~$798K

~$798K

planned to sell · 4,202 shares, around Oct 5, 2026

Planned for

Oct 5, 2026

Notice filed

Oct 5, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Aug 20, 2026InsiderCEO sold ~$977K of RGEN shares in the open market
2. Sep 1, 2026Federal contract · $169K obligatedDepartment of Agriculture awarded REPLIGEN CORP: $169K obligated to date
3. Sep 4, 2026InsiderCEO sold ~$504K of RGEN shares in the open market
4. Sep 10, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On September 10, 2026, Karen A. Dawes notified Repligen Corporation (“Repligen”) that she will be retiring from the Repligen Board of Directors (the “Board”) after over twenty years of distinguished service to Repligen, effective as of September 30, 2026.”
5. Sep 21, 2026InsiderCEO sold ~$977K of RGEN shares in the open market
6. Sep 24, 2026Insider · 1 personInsiders: 2 sales (~$2.5M)
7. Oct 5, 2026Insider · 1 personInsiders: 2 sales (~$1.0M)

What came next

1. Oct 6, 2026Company filing · Form 8-K · Acquisition or sale, Reg FDCompleted buying or selling a business or assets, and shared information with investors“The information set forth in the “Explanatory Note” of this Current Report on Form 8-K is incorporated by reference into this”
2. Oct 7, 20265% stakeFMR LLC reported a passive stake (13G) of 13.0%

How to read SEC Form 144

Form 144 is a notice that a company insider plans to sell shares. It is filed when the sell order is placed, so it announces a planned sale and does not prove that the sale took place.

Full guide: What is an SEC Form 144?

What else is on file for Repligen

For Repligen, OQRO holds 10 insider filings (SEC Form 4 or Form 144), 15 fund holdings reports (13F) and 1 federal contract award dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its RGEN page.

How this filing works

• SEC Form 144
• Rule 10b5-1 trading plans

Other disclosures at Repligen

• SEC Form 4Oct 6, 2026
• SEC Form 4Oct 6, 2026
• SEC Form 144Oct 5, 2026
• SEC Form 4Sep 26, 2026
• SEC Form 4Sep 26, 2026
• SEC Form 4Sep 23, 2026

Everything OQRO holds on this company is on its RGEN page.