Ticker · CUSIP 75886F107

REGN

REGENERON PHARMACEUTICALS

Healthcare·Biotechnology

···Share

Holders (tracked)

Combined shares

11,759,078

Combined value

$9.08B

Last close

$750.57

Quarter

2025Q4

Price is -2.8% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$750.57+190.47 (+34.01%)H $811.29 · L $481.15 · Avg Vol 1.0M

Congress buy

Tracked holders · last 8 quarters

+5 vs previous quarter over the last 8.

SEC event timeline

30 events

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

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 each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Cathie Wood (ARK Invest)	2016Q4	$482.59	+55.5%	$83K
Ray Dalio (Bridgewater Associates)	2016Q1	$558.08	+34.5%	$54.6M
Ken Fisher (Fisher Asset Mgmt)	2016Q1	$571.09	+31.4%	$3.7M
Steve Cohen (Point72)	2016Q1	$594.80	+26.2%	$676K
Steve Cohen (Point72)	2016Q1	$594.80	+26.2%	$676K
Steve Cohen (Point72)	2016Q1	$594.80	+26.2%	$676K
Renaissance Technologies	2016Q1	$602.25	+24.6%	$6.8M
Dodge & Cox	2021Q4	$620.75	+20.9%	$3.45B
Two Sigma Investments	2016Q1	$624.38	+20.2%	$211.0M
Southeastern Asset (Longleaf)	2025Q1	$624.70	+20.1%	$124.4M
AQR Capital Management	2016Q1	$630.97	+19.0%	$747.4M
Mario Gabelli (GAMCO)	2016Q1	$631.72	+18.8%	$487K
Jeremy Grantham (GMO)	2019Q1	$637.45	+17.7%	$42.6M
Paul Tudor Jones (Tudor Investment)	2016Q2	$676.46	+11.0%	$39.2M
Paul Tudor Jones (Tudor Investment)	2016Q2	$676.46	+11.0%	$39.2M
Ken Griffin (Citadel Advisors)	2016Q1	$705.94	+6.3%	$205.7M
Ken Griffin (Citadel Advisors)	2016Q1	$705.94	+6.3%	$205.7M
Ken Griffin (Citadel Advisors)	2016Q1	$705.94	+6.3%	$205.7M
T. Rowe Price	2016Q1	$758.45	-1.0%	$1.46B
D.E. Shaw & Co.	2016Q1	$759.78	-1.2%	$11.4M
D.E. Shaw & Co.	2016Q1	$759.78	-1.2%	$11.4M
D.E. Shaw & Co.	2016Q1	$759.78	-1.2%	$11.4M
Izzy Englander (Millennium Mgmt)	2016Q1	$765.51	-2.0%	$29.3M
Izzy Englander (Millennium Mgmt)	2016Q1	$765.51	-2.0%	$29.3M
Izzy Englander (Millennium Mgmt)	2016Q1	$765.51	-2.0%	$29.3M
Wellington Management	2016Q1	$768.94	-2.4%	$498.7M
Norges Bank (Norway SWF)	2016Q1	$11418.12	-93.4%	$984.4M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions2

Norges Bank (Norway SWF)
+1,311,485
$1.01B
Paul Tudor Jones (Tudor Investment)
+77,700
$60.0M

Added to9

Wellington Management
+656,845
$507.0M
AQR Capital Management
+274,356
$211.8M
Izzy Englander (Millennium Mgmt)
+178,688
$137.9M
Steve Cohen (Point72)
+61,028
$47.1M
Dodge & Cox
+45,513
$35.1M
Southeastern Asset (Longleaf)
+21,185
$16.4M
T. Rowe Price
+1,144,887
$884K
Ken Fisher (Fisher Asset Mgmt)
+353
$273K
Mario Gabelli (GAMCO)
+3
$2K

Trimmed7

D.E. Shaw & Co.
−706,118
$545.0M
Renaissance Technologies
−266,080
$205.4M
Two Sigma Investments
−188,752
$145.7M
Ray Dalio (Bridgewater Associates)
−162,636
$125.5M
Ken Griffin (Citadel Advisors)
−85,257
$65.8M
Cathie Wood (ARK Invest)
−12,032
$9.3M
Jeremy Grantham (GMO)
−4,770
$3.7M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	23	19,805,206	$702.93B	—
2022Q2	24	19,663,636	$532.66B	+1
2022Q3	23	19,352,158	$13.33B	-1
2022Q4	25	18,687,502	$13.48B	+2
2023Q1	23	19,272,396	$15.84B	-2
2023Q2	21	18,258,709	$13.12B	-2
2023Q3	20	16,398,241	$13.50B	-1
2023Q4	19	14,870,418	$13.06B	-1
2024Q1	20	15,347,631	$14.77B	+1
2024Q2	21	15,378,947	$16.16B	+1
2024Q3	26	6,871,217	$7.22B	+5
2024Q4	23	7,526,333	$5.36B	-3
2025Q1	25	7,101,792	$4.50B	+2
2025Q2	28	9,790,223	$5.14B	+3
2025Q3	22	9,290,780	$5.22B	-6
2025Q4	27	11,759,078	$9.08B	+5

Congress members trading this stock

Date	Member	Type	Amount range	Filing
2026-02-12	Julia Letlow	Buy	$1K – $15K	PDF ↗
2025-11-18	Gilbert Cisneros	Buy	$1K – $15K	PDF ↗
2025-05-15	Rob Bresnahan	Buy	$1K – $15K	PDF ↗
2025-04-10	Byron Donalds	Sell	$1K – $15K	PDF ↗
2025-04-10	Byron Donalds	Sell	$1K – $15K	PDF ↗
2025-04-08	Rob Bresnahan	Sell	$1K – $15K	PDF ↗
2025-04-01	Julie Johnson	Sell	$1K – $15K	PDF ↗
2025-02-25	Rob Bresnahan	Sell	$1K – $15K	PDF ↗
2025-02-12	Julie Johnson	Sell (P)	$1K – $15K	PDF ↗
2025-01-24	Josh Gottheimer	Sell	$1K – $15K	PDF ↗
2025-01-15	Julie Johnson	Buy	$1K – $15K	PDF ↗

Who owns REGN

27 super-investors · 2025Q4

Tracked stake

11.76M

Combined value

$9.08B

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added13Trim11

#	Manager	Shares	Value	% of book	Last action
1	Dodge & Cox	4.60M	$3.55B	1.9%	Added+45.5K
2	T. Rowe Price	1.95M	$1.50B	0.2%	Added+1.14M
3	Norges Bank Norway SWF	1.31M	$1.01B	0.1%	New+1.31M
4	AQR Capital Management	995.7K	$769M	0.4%	Added+274.4K
5	Wellington Management	664.5K	$513M	0.1%	Added+656.8K
6	Izzy Englander Millennium Mgmt	379.8K	$293M	0.1%	Added+178.7K
7	Two Sigma Investments	281.2K	$217M	0.3%	Trim−188.8K
8	Ken Griffin Citadel Advisors	274.0K	$211M	0.0%	Trim−85.3K
9	Ken Griffin Citadel Advisors	265.3K	$205M	0.0%	Trim−85.3K
10	Steve Cohen Point72	262.5K	$203M	0.2%	Added+61.0K
11	Southeastern Asset Longleaf	165.8K	$128M	5.7%	Added+21.2K
12	D.E. Shaw & Co.	155.5K	$120M	0.1%	Trim−706.1K
13	Ken Griffin Citadel Advisors	145.0K	$112M	0.0%	Trim−85.3K
14	Ray Dalio Bridgewater Associates	72.7K	$56M	0.2%	Trim−162.6K
15	Jeremy Grantham GMO	56.7K	$44M	0.1%	Trim−4.8K
16	Paul Tudor Jones Tudor Investment	52.2K	$40M	0.1%	New+77.7K
17	Izzy Englander Millennium Mgmt	39.0K	$30M	0.0%	Added+178.7K
18	Paul Tudor Jones Tudor Investment	25.5K	$20M	0.0%	New+77.7K
19	Izzy Englander Millennium Mgmt	25.0K	$19M	0.0%	Added+178.7K
20	D.E. Shaw & Co.	15.2K	$12M	0.0%	Trim−706.1K
21	Renaissance Technologies	9.1K	$7M	0.0%	Trim−266.1K
22	D.E. Shaw & Co.	7.8K	$6M	0.0%	Trim−706.1K
23	Ken Fisher Fisher Asset Mgmt	5.0K	$4M	0.0%	Added+353
24	Steve Cohen Point72	2.4K	$2M	0.0%	Added+61.0K
25	Steve Cohen Point72	900	$695K	0.0%	Added+61.0K
26	Mario Gabelli GAMCO	649	$501K	0.0%	Added+3
27	Cathie Wood ARK Invest	110	$85K	0.0%	Trim−12.0K

Recent moves

20 transactions

NEWPaul Tudor Jones (Tudor Investment)
+77,700 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−85,257 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+178,688 · 2025Q4
TRIMD.E. Shaw & Co.
−706,118 · 2025Q4
TRIMTwo Sigma Investments
−188,752 · 2025Q4
TRIMJeremy Grantham (GMO)
−4,770 · 2025Q4
ADDAQR Capital Management
+274,356 · 2025Q4
ADDSteve Cohen (Point72)
+61,028 · 2025Q4
ADDT. Rowe Price
+1,144,887 · 2025Q4
ADDWellington Management
+656,845 · 2025Q4
ADDDodge & Cox
+45,513 · 2025Q4
TRIMRay Dalio (Bridgewater Associates)
−162,636 · 2025Q4
ADDSoutheastern Asset (Longleaf)
+21,185 · 2025Q4
TRIMRenaissance Technologies
−266,080 · 2025Q4
TRIMCathie Wood (ARK Invest)
−12,032 · 2025Q4
NEWNorges Bank (Norway SWF)
+1,311,485 · 2025Q4
ADDKen Fisher (Fisher Asset Mgmt)
+353 · 2025Q4
ADDMario Gabelli (GAMCO)
+3 · 2025Q4
SOLDPaul Tudor Jones (Tudor Investment)
−84,550 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−137,746 · 2025Q3

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