REGENERON PHARMACEUTICALS (REGN) Stock Institutional Trading Activity
REGENERON PHARMACEUTICALS (REGN) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Longleaf Partners, Dodge & Cox Stock Fund, Sound Shore Management, and Sequoia Financial Advisors. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.
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- REGENERON PHARMACEUTICALS (REGN) stock institutional ownership
- REGENERON PHARMACEUTICALS (REGN) stock insider trading activity
- Stock rankings
| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2016 | Polen Capital Management | Buy | 80,393 | 706,090 | $254,503 |
| Q4 2015 | Renaissance Technologies LLC | Sell | -60,226 | 107,262 | $58,229 |
| Q4 2015 | Polen Capital Management | Buy | 50,192 | 625,697 | $339,672 |
| Q3 2015 | Sequoia Financial Advisors | Buy | 10 | 527 | $245 |
| Q3 2015 | Polen Capital Management | Buy | 20,546 | 575,505 | $267,690 |
| Q2 2015 | Sequoia Financial Advisors | Buy | 517 | 517 | $264 |
| Q2 2015 | Polen Capital Management | Sell | -11,906 | 554,959 | $283,101 |
| Q1 2015 | Renaissance Technologies LLC | Buy | 140,926 | 167,488 | $75,617 |
| Q1 2015 | Polen Capital Management | Buy | 24,572 | 566,865 | $255,928 |
| Q4 2014 | Polen Capital Management | Sell | -9,609 | 542,293 | $222,476 |
| Q3 2014 | Polen Capital Management | Buy | 343,312 | 551,902 | $198,972 |
| Q3 2014 | Renaissance Technologies LLC | Buy | 23,700 | 26,562 | $9,576 |
| Q3 2014 | Viking Global Investors | Sell | -1,882,774 | 1,080,682 | $389,607 |
| Q2 2014 | Polen Capital Management | Sell | -10,573 | 208,590 | $58,920 |
| Q2 2014 | Renaissance Technologies LLC | Sell | -67,200 | 2,862 | $808 |
| Q2 2014 | Viking Global Investors | Buy | 1,911,656 | 2,963,456 | $837,087 |
| Q1 2014 | Viking Global Investors | Buy | 1,051,800 | 1,051,800 | $315,835 |
| Q1 2014 | Polen Capital Management | Buy | 217,412 | 219,163 | $65,810 |
| Q4 2013 | Renaissance Technologies LLC | Sell | -179,459 | 70,062 | $19,284 |
| Q3 2013 | Renaissance Technologies LLC | Buy | 14,759 | 249,521 | $78,068 |
| Q2 2013 | Renaissance Technologies LLC | Buy | 234,762 | 234,762 | $52,793 |
| Q2 2013 | Polen Capital Management | Buy | 1,751 | 1,751 | $394 |
Frequently asked questions about REGN activity
Which institutional owners are buying REGN?
Institutional owners buying REGN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in REGN activity?
"Buy" means an investor increased their reported position in REGN compared to the prior reporting period. This reflects growing exposure to REGENERON PHARMACEUTICALS (REGN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in REGN increasing?
Institutional interest in REGN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.