# Regeneron Pharmaceuticals, Inc. (REGN) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 75886F107
Page URL: https://superinvestorclub.com/stock/REGN
Last updated: 2026-07-08T11:30:34.428Z

## Summary

As of the most recent 13F filing period, Regeneron Pharmaceuticals, Inc. (REGN) is held by 4 tracked superinvestors with an aggregate position value of $3.68B representing 0445823815096013066222724 shares.

## Top institutional holders (4)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Dodge & Cox](https://superinvestorclub.com/manager/16) | Dodge & Cox | 4458238 | $3.44B | 1.89% | 2026-03-31 |
| 2 | [Harry Burn](https://superinvestorclub.com/manager/81) | Sound Shore Management | 150960 | $116.6M | 3.91% | 2026-03-31 |
| 3 | [Longleaf Partners](https://superinvestorclub.com/manager/15) | Southeastern Asset Management | 130662 | $101.0M | 4.97% | 2026-03-31 |
| 4 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 22724 | $17.6M | 0.08% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2023-12-31: 1 holders, $2.08B aggregate, 02367680 shares
- 2024-03-31: 2 holders, $2.33B aggregate, 0235986461146 shares
- 2024-06-30: 2 holders, $2.44B aggregate, 023156865354 shares
- 2024-09-30: 2 holders, $53.0M aggregate, 049870557 shares
- 2024-12-31: 2 holders, $1.65B aggregate, 02321316289 shares
- 2025-03-31: 4 holders, $1.62B aggregate, 023240851148809773920991 shares
- 2025-06-30: 5 holders, $2.25B aggregate, 038262832000001605818904715000 shares
- 2025-09-30: 4 holders, $2.84B aggregate, 04550845235381144607115028 shares
- 2025-12-31: 4 holders, $3.87B aggregate, 0459635817588716579272745 shares
- 2026-03-31: 4 holders, $3.68B aggregate, 0445823815096013066222724 shares

## Recent congressional trades (32)

- 2025-11-18: Gil Cisneros (Democrat-CA) purchase $1,001 - $15,000
- 2025-11-03: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-08-26: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-08-04: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-07-25: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-07-01: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-05-28: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-05-19: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-05-15: Rob Bresnahan (Republican-PA) purchase $1,001 - $15,000
- 2025-04-15: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-04-10: Byron Donalds (Republican-FL) sale $1,001 - $15,000
- 2025-04-09: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-04-08: Rob Bresnahan (Republican-PA) sale $1,001 - $15,000
- 2025-04-07: Jefferson Shreve (Republican-IN) sale $15,001 - $50,000
- 2025-04-01: Julie Johnson (Democrat-TX) sale $1,001 - $15,000

## Recent insider transactions (0)


## Citation

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