Regeneron Pharmaceuticals, Inc.
REGN- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0000872589
In the last 90 days, Regeneron Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 5 sales; 1,341 institutions reported holding it in 13F filings for Q2 2026, worth $57.1B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.
Superinvestors holding REGN, Q2 2026
1 superinvestor reports holding Regeneron Pharmaceuticals, Inc. on Form 13F, worth $95.0M in total. Weight is Regeneron Pharmaceuticals, Inc.'s share of each 13F portfolio; actions compare shares with Q1 2026.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| Southeastern Asset Management (Longleaf)Mason Hawkins | 5.0% | 152,322 | $95.0M | Added+16.6% |
Moves by quarter
Superinvestors that opened, added to, trimmed or sold out of REGN each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.
Q2 2026
1 superinvestor holding at quarter end
- Added
- Southeastern Asset Management (Longleaf) (+16.6%)
Q1 2026
1 superinvestor holding at quarter end
- Reduced
- Southeastern Asset Management (Longleaf) (−21.2%)
- Sold out
- ARK Invest
Q4 2025
2 superinvestors holding at quarter end
- Added
- Southeastern Asset Management (Longleaf) (+14.7%)
- Reduced
- ARK Invest (−99.1%)
Q3 2025
2 superinvestors holding at quarter end
- Reduced
- Southeastern Asset Management (Longleaf) (−9.9%), ARK Invest (−3.7%)
Q2 2025
2 superinvestors holding at quarter end
- Added
- Southeastern Asset Management (Longleaf) (+39.8%)
- Reduced
- ARK Invest (−7.9%)
- Sold out
- Viking Global Investors, Greenwoods Asset Management
Q1 2025
4 superinvestors holding at quarter end
- New
- Southeastern Asset Management (Longleaf), Viking Global Investors
- Added
- ARK Invest (+3.8%), Greenwoods Asset Management (+37.7%)
Q4 2024
2 superinvestors holding at quarter end
- New
- Greenwoods Asset Management
- Reduced
- ARK Invest (−12.9%)
- Sold out
- Viking Global Investors
Q3 2024
2 superinvestors holding at quarter end
- New
- Viking Global Investors
- Reduced
- ARK Invest (−4.5%)
Q2 2024
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−12.9%)
- Sold out
- Soros Fund Management
Q1 2024
2 superinvestors holding at quarter end
- Reduced
- ARK Invest (−34.3%), Soros Fund Management (−14.3%)
- Sold out
- Maverick Capital
Q4 2023
3 superinvestors holding at quarter end
- New
- Soros Fund Management, Maverick Capital
- Reduced
- ARK Invest (0.0%)
Q3 2023
1 superinvestor holding at quarter end
- Reduced
- ARK Invest (−14.0%)
- Sold out
- Harris Associates (Oakmark)
Q2 2023
2 superinvestors holding at quarter end
- Reduced
- ARK Invest (−4.0%), Harris Associates (Oakmark) (−53.4%)
- Sold out
- HHLR Advisors (Hillhouse)
Q1 2023
3 superinvestors holding at quarter end
- New
- HHLR Advisors (Hillhouse)
- Reduced
- ARK Invest (−1.4%), Harris Associates (Oakmark) (−97.9%)
- Sold out
- Markel Group
Q4 2022
3 superinvestors holding at quarter end
- Reduced
- Harris Associates (Oakmark) (−52.4%), ARK Invest (−7.8%), Markel Group (−62.0%)
Q3 2022
3 superinvestors holding at quarter end
- Reduced
- Harris Associates (Oakmark) (−67.7%), ARK Invest (−33.8%)
Q2 2022
3 superinvestors holding at quarter end
- Reduced
- Harris Associates (Oakmark) (−46.7%), ARK Invest (−3.4%)
Q1 2022
3 superinvestors holding at quarter end
- Added
- Markel Group (+1.3%)
- Reduced
- Harris Associates (Oakmark) (−17.3%), ARK Invest (−20.9%)
Q4 2021
3 superinvestors holding at quarter end
- Added
- Markel Group (+6.7%)
- Reduced
- Harris Associates (Oakmark) (−0.4%), ARK Invest (−83.0%)
- Sold out
- Maverick Capital
Q3 2021
4 superinvestors holding at quarter end
- New
- Maverick Capital
- Added
- Markel Group (+11.2%)
- Reduced
- Harris Associates (Oakmark) (−8.2%), ARK Invest (−40.0%)
Q2 2021
3 superinvestors holding at quarter end
- Added
- Harris Associates (Oakmark) (+39.8%), Markel Group (+46.8%)
- Reduced
- ARK Invest (−41.5%)