Ticker · CUSIP 75886F107

REGN

REGENERON PHARMACEUTICALS
Healthcare·Biotechnology
···Share
Holders (tracked)
27
Combined shares
11,759,078
Combined value
$7.57B
Last close
$746.00
Quarter
2025Q4
Tracked holders · last 8 quarters
+5 vs previous quarter over the last 8.
27202024Q12025Q4
Price is +15.8% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

30 events
  1. Wellington Management added2026-02-17
    +656,845 shares · 2025Q4
    13F
  2. Izzy Englander (Millennium Mgmt) added2026-02-17
    +178,688 shares · 2025Q4
    13F
  3. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +77,700 shares · 2025Q4
    13F
  4. Ken Griffin (Citadel Advisors) trimmed2026-02-17
    −85,257 shares · 2025Q4
    13F
  5. D.E. Shaw & Co. trimmed2026-02-17
    −706,118 shares · 2025Q4
    13F
  6. Two Sigma Investments trimmed2026-02-17
    −188,752 shares · 2025Q4
    13F
  7. Jeremy Grantham (GMO) trimmed2026-02-17
    −4,770 shares · 2025Q4
    13F
  8. AQR Capital Management added2026-02-17
    +274,356 shares · 2025Q4
    13F
  9. Steve Cohen (Point72) added2026-02-17
    +61,028 shares · 2025Q4
    13F
  10. T. Rowe Price added2026-02-17
    +1,144,887 shares · 2025Q4
    13F
  11. Ray Dalio (Bridgewater Associates) trimmed2026-02-13
    −162,636 shares · 2025Q4
    13F
  12. Dodge & Cox added2026-02-13
    +45,513 shares · 2025Q4
    13F
  13. Southeastern Asset (Longleaf) added2026-02-13
    +21,185 shares · 2025Q4
    13F
  14. Renaissance Technologies trimmed2026-02-12
    −266,080 shares · 2025Q4
    13F
  15. Cathie Wood (ARK Invest) trimmed2026-02-11
    −12,032 shares · 2025Q4
    13F
  16. Norges Bank (Norway SWF) opened position2026-02-10
    +1,311,485 shares · 2025Q4
    13F
  17. Ken Fisher (Fisher Asset Mgmt) added2026-02-09
    +353 shares · 2025Q4
    13F
  18. Mario Gabelli (GAMCO) added2026-02-05
    +3 shares · 2025Q4
    13F
  19. Paul Tudor Jones (Tudor Investment) exited2025-12-09
    −84,550 shares · 2025Q3
    13F
  20. AQR Capital Management added2025-11-14
    +606,612 shares · 2025Q3
    13F
  21. Izzy Englander (Millennium Mgmt) trimmed2025-11-14
    −137,746 shares · 2025Q3
    13F
  22. Steve Cohen (Point72) added2025-11-14
    +58,391 shares · 2025Q3
    13F
  23. Two Sigma Investments trimmed2025-11-14
    −29,925 shares · 2025Q3
    13F
  24. D.E. Shaw & Co. added2025-11-14
    +84,124 shares · 2025Q3
    13F
  25. T. Rowe Price added2025-11-14
    +38,466 shares · 2025Q3
    13F
  26. Wellington Management trimmed2025-11-14
    −63,535 shares · 2025Q3
    13F
  27. Southeastern Asset (Longleaf) trimmed2025-11-14
    −15,974 shares · 2025Q3
    13F
  28. Dodge & Cox added2025-11-13
    +724,562 shares · 2025Q3
    13F
  29. Jeremy Grantham (GMO) trimmed2025-11-13
    −3,809 shares · 2025Q3
    13F
  30. Norges Bank (Norway SWF) exited2025-11-13
    −1,196,479 shares · 2025Q3
    13F

Insider activity

No insider transactions in the last 30 days.
View full insider history for REGN →
Follow-the-investor returns
If you'd copied each holder of REGN…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2016Q1$50.58+1374.8%$1.45B
Cathie Wood (ARK Invest)2016Q4$482.59+54.6%$82K
Renaissance Technologies2016Q1$542.98+37.4%$6.8M
Ray Dalio (Bridgewater Associates)2016Q1$558.08+33.7%$54.3M
Ken Fisher (Fisher Asset Mgmt)2016Q1$567.07+31.6%$3.7M
Steve Cohen (Point72)2016Q1$594.80+25.4%$671K
Steve Cohen (Point72)2016Q1$594.80+25.4%$671K
Steve Cohen (Point72)2016Q1$594.80+25.4%$671K
Dodge & Cox2021Q4$617.77+20.8%$3.43B
Two Sigma Investments2016Q1$624.38+19.5%$209.7M
Southeastern Asset (Longleaf)2025Q1$624.70+19.4%$123.7M
AQR Capital Management2016Q1$630.97+18.2%$742.8M
Mario Gabelli (GAMCO)2016Q1$631.72+18.1%$484K
Jeremy Grantham (GMO)2019Q1$637.45+17.0%$42.3M
Paul Tudor Jones (Tudor Investment)2016Q2$676.41+10.3%$38.9M
Paul Tudor Jones (Tudor Investment)2016Q2$676.41+10.3%$38.9M
Ken Griffin (Citadel Advisors)2016Q1$705.94+5.7%$204.4M
Ken Griffin (Citadel Advisors)2016Q1$705.94+5.7%$204.4M
Ken Griffin (Citadel Advisors)2016Q1$705.94+5.7%$204.4M
D.E. Shaw & Co.2016Q1$759.78-1.8%$11.3M
D.E. Shaw & Co.2016Q1$759.78-1.8%$11.3M
D.E. Shaw & Co.2016Q1$759.78-1.8%$11.3M
Izzy Englander (Millennium Mgmt)2016Q1$765.51-2.5%$29.1M
Izzy Englander (Millennium Mgmt)2016Q1$765.51-2.5%$29.1M
Izzy Englander (Millennium Mgmt)2016Q1$765.51-2.5%$29.1M
Wellington Management2016Q1$768.89-3.0%$495.7M
Norges Bank (Norway SWF)2016Q1$11418.12-93.5%$978.4M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions2
Added to9
Trimmed7
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
23
$702.93B
2022Q2
24
$532.66B
2022Q3
23
$637.2M
2022Q4
25
$11.88B
2023Q1
23
$13.61B
2023Q2
21
$11.44B
2023Q3
20
$11.54B
2023Q4
19
$12.22B
2024Q1
20
$13.74B
2024Q2
21
$15.18B
2024Q3
26
$5.88B
2024Q4
23
$3.88B
2025Q1
25
$3.13B
2025Q2
28
$4.74B
2025Q3
22
$4.77B
2025Q4
27
$7.57B
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2026-02-12Julia LetlowBuy$1K – $15KPDF ↗
2025-11-18Gilbert CisnerosBuy$1K – $15KPDF ↗
2025-05-15Rob BresnahanBuy$1K – $15KPDF ↗
2025-04-10Byron DonaldsSell$1K – $15KPDF ↗
2025-04-10Byron DonaldsSell$1K – $15KPDF ↗
2025-04-08Rob BresnahanSell$1K – $15KPDF ↗
2025-04-01Julie JohnsonSell$1K – $15KPDF ↗
2025-02-25Rob BresnahanSell$1K – $15KPDF ↗
2025-02-12Julie JohnsonSell (P)$1K – $15KPDF ↗
2025-01-24Josh GottheimerSell$1K – $15KPDF ↗
2025-01-15Julie JohnsonBuy$1K – $15KPDF ↗

Who owns REGN

27 super-investors · 2025Q4
Tracked stake
11.76M
shares
Combined value
$7.57B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added13Trim11
#ManagerSharesValue
1Dodge & Cox4.60M$3.55B
2Norges Bank
Norway SWF
1.31M$1.01B
3AQR Capital Management995.7K$769M
4Wellington Management664.5K$513M
5Izzy Englander
Millennium Mgmt
379.8K$293M
6Two Sigma Investments281.2K$217M
7Ken Griffin
Citadel Advisors
274.0K$211M
8Ken Griffin
Citadel Advisors
265.3K$205M
9Steve Cohen
Point72
262.5K$203M
10Southeastern Asset
Longleaf
165.8K$128M
11D.E. Shaw & Co.155.5K$120M
12Ken Griffin
Citadel Advisors
145.0K$112M
13Ray Dalio
Bridgewater Associates
72.7K$56M
14Jeremy Grantham
GMO
56.7K$44M
15Paul Tudor Jones
Tudor Investment
52.2K$40M
16Izzy Englander
Millennium Mgmt
39.0K$30M
17Paul Tudor Jones
Tudor Investment
25.5K$20M
18Izzy Englander
Millennium Mgmt
25.0K$19M
19D.E. Shaw & Co.15.2K$12M
20Renaissance Technologies9.1K$7M
21D.E. Shaw & Co.7.8K$6M
22Ken Fisher
Fisher Asset Mgmt
5.0K$4M
23Steve Cohen
Point72
2.4K$2M
24T. Rowe Price1.95M$2M
25Steve Cohen
Point72
900$695K
26Mario Gabelli
GAMCO
649$501K
27Cathie Wood
ARK Invest
110$85K

Recent moves

20 transactions
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