Company Analysis

Repligen Corporation (RGEN)

Nasdaq: RGEN · Biological Products, (No Diagnostic Substances) · Waltham, MA · filing with the SEC since 1995
Grade5.4
◀ Past 6.3● Present 6.4▶ Future 4.1

Filings

259 filings since 2017 beside 415 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026
Due nextLarge accelerated filer
10-K Annual report for the fiscal year ending Dec 31, 2026Large accelerated filers have 60 days after the fiscal year ends. by Mar 1, 2027
10-Q Quarterly report for the quarter ending Mar 31, 2027Large accelerated filers have 40 days after the quarter ends; quarter ends are taken to the month end. by May 10, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 27 days after the quarter ended. The proxy statement was last filed Apr 2, 2026.

Filings a yearinsider forms included
6066655764997082
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Officer or director change (8-K item 5.02): 5 times in the last 36 months, the newest Sep 15, 2026.Warning not to rely on past financial statements (8-K item 4.02): 1 time in the last 36 months, the newest Sep 18, 2024.SEC letters: 6 in the last 36 months, the newest Sep 10, 2025.A late-filing notice, Form NT 10-K, filed Mar 3, 2025.A late-filing notice, Form NT 10-Q, filed Nov 12, 2024.
Insider forms 415

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Nov 6, 2026 8-K items 1.01, 2.03, 3.02, 9.01 Major agreement signed; New debt or obligation taken on; Shares sold without registration · Current report
Oct 30, 2026 10-Q Quarterly report Sep 30, 2026
Oct 30, 2026 8-K items 3.02, 8.01, 9.01 Shares sold without registration; Other event · Current report Oct 29, 2026
Oct 27, 2026 8-K items 2.02, 9.01 Results released · Current report
Oct 7, 2026 SCHEDULE 13G/A Large holder update, amended
Oct 6, 2026 8-K items 2.01, 7.01, 9.01 Purchase or sale of a business completed; Investor disclosure (Regulation FD) · Current report
Sep 30, 2026 425 Merger communication
Sep 15, 2026 8-K item 5.02 Officer or director change · Current report Sep 10, 2026
Sep 8, 2026 425 Merger communication
Sep 8, 2026 8-K item 8.01 Other event · Current report Sep 3, 2026
Sep 4, 2026 EFFECT Registration effective
Sep 4, 2026 424B3 Shelf offering
Sep 4, 2026 S-4/A Merger or exchange registration, amended
Aug 25, 2026 S-4 Merger or exchange registration
Aug 14, 2026 SCHEDULE 13G/A Large holder update, amended
Aug 4, 2026 425 Merger communication
Jul 31, 2026 SCHEDULE 13G Large holder notice
Jul 29, 2026 10-Q Quarterly report Jun 30, 2026
Jul 28, 2026 8-K items 2.02, 9.01 Results released · Current report
Jul 24, 2026 425 Merger communication
Jul 22, 2026 425 Merger communication
Jul 22, 2026 425 Merger communication
Jul 22, 2026 8-K items 1.01, 2.02, 7.01, 8.01, 9.01 Major agreement signed; Results released; Investor disclosure (Regulation FD); Other event · Current report Jul 21, 2026
May 15, 2026 8-K item 5.07 Shareholder vote · Current report May 14, 2026
May 6, 2026 10-Q Quarterly report Mar 31, 2026
May 5, 2026 8-K items 2.02, 9.01 Results released · Current report
Apr 27, 2026 DEFA14A Extra proxy material
Apr 2, 2026 ARS Annual report to shareholders Dec 31, 2025
Apr 2, 2026 DEFA14A Extra proxy material
Apr 2, 2026 DEF 14A Proxy statement May 14, 2026
Mar 27, 2026 SCHEDULE 13G/A Large holder update, amended
Feb 26, 2026 10-K Annual report Dec 31, 2025
Feb 24, 2026 8-K items 2.02, 9.01 Results released · Current report
Feb 17, 2026 SCHEDULE 13G/A Large holder update, amended
Feb 13, 2026 SCHEDULE 13G/A Large holder update, amended
Feb 5, 2026 SCHEDULE 13G Large holder notice
Jan 6, 2026 8-K items 5.02, 7.01, 9.01 Officer or director change; Investor disclosure (Regulation FD) · Current report
Nov 4, 2025 10-Q Quarterly report Sep 30, 2025
Oct 28, 2025 8-K items 2.02, 9.01 Results released · Current report
Sep 10, 2025 UPLOAD SEC comment letter
40 of 259 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton RGEN · research, not advice