# Regeneron Pharmaceuticals (REGN): value investors who own it

3 value investors held Regeneron Pharmaceuticals in their Q3 2026 13F, led by Southeastern Asset Management, Dodge & Cox, Horizon Kinetics.

## 13F holders

| Manager | Portfolio | Value | Change | Quarters held |
| --- | --- | --- | --- | --- |
| Southeastern Asset Management | 5.0% | $95.0m | Added +17% | 6 |
| Dodge & Cox | 1.6% | $3.0bn | Added +9.3% | 19 |
| Horizon Kinetics | 0.0% | $402k | Trimmed -4.4% | 14 |

## Directors buying and selling (Form 4, last 12 months)

| Date | Who | Role | Bought or sold | Shares | Value |
| --- | --- | --- | --- | --- | --- |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 463 | $361k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 454 | $354k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 380 | $296k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 376 | $292k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 283 | $218k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 279 | $214k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 271 | $207k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 224 | $173k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 219 | $167k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 211 | $163k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 192 | $147k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 127 | $98k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 121 | $94k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 105 | $81k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 74 | $56k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 66 | $51k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 55 | $42k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 50 | $39k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 38 | $30k |
| 2026-10-14 | MURPHY ANDREW J | Co-Chief Scientific Officer | Sold | 35 | $26k |

## Fund holders

| Fund | Manager | Weight | Value | As at |
| --- | --- | --- | --- | --- |
| Longleaf Partners Global Fund | Southeastern Asset Management | 4.8% | $33.0m | 2026-06-30 |
| Dodge & Cox Global Stock Fund | Dodge & Cox | 1.4% | $187m | 2026-06-30 |

Source: SEC filings, via moatshark (https://www.moatshark.com/s/regn). Values traded and returns are estimates. Not investment advice. Built 2026-10-21.