# REPLIGEN CORP (RGEN) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 759916109
Page URL: https://superinvestorclub.com/stock/RGEN
Last updated: 2026-08-29T13:46:29.337Z

## Summary

As of the most recent 13F filing period, REPLIGEN CORP (RGEN) is held by 3 tracked superinvestors with an aggregate position value of $286.9M representing 019845547740040800 shares.

## Top institutional holders (3)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Lee Ainslie](https://superinvestorclub.com/manager/58) | Maverick Capital | 1984554 | $270.8M | 2.39% | 2026-06-30 |
| 2 | [Stanley Druckenmiller](https://superinvestorclub.com/manager/19) | Duquesne Family Office | 77400 | $10.6M | 0.20% | 2026-06-30 |
| 3 | [Wallace Weitz](https://superinvestorclub.com/manager/82) | Weitz Investment Management | 40800 | $5.6M | 0.39% | 2026-06-30 |

## Ownership history (quarter-over-quarter)

- 2025-03-31: 1 holders, $3.9M aggregate, 030902 shares
- 2025-06-30: 1 holders, $238,436 aggregate, 01917 shares
- 2025-09-30: 1 holders, $4.5M aggregate, 033616 shares
- 2025-12-31: 1 holders, $1.3M aggregate, 07874 shares
- 2026-03-31: 2 holders, $182.0M aggregate, 0151880525500 shares
- 2026-06-30: 3 holders, $286.9M aggregate, 019845547740040800 shares

## Recent congressional trades (7)

- 2025-10-31: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-07-22: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-06-17: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-06-11: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-04-07: Jefferson Shreve (Republican-IN) sale $15,001 - $50,000

## Recent insider transactions (0)


## Citation

When citing, use: "REPLIGEN CORP (RGEN) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/RGEN), aggregating SEC 13F, Form 4, and congressional disclosures."