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REGN in the 13F filings

Regeneron Pharmaceuticals · CUSIP 75886F107

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2023
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 17 Jan 2024
Managers listing it
35
at least, of 95 tracked, among listed positions
Comparable managers
93
filed both Q3 2023 and Q4 2023; 25 listed it in both
Shares listed
24,926,379
combined, among listed positions
Reported value
$21.9bn
combined, at the quarter end

Among the 93 comparable managers: 22 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing REGN in Q4 2023

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2023, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

35 of 35 holders

ActionFiling
Fidelity (FMR LLC)10,317,415$9.1bn0.70%Added+476,5235 Nov 2026 (the filing on sec.gov)
Capital World Investors5,130,485$4.5bn0.80%Added+23,14613 Feb 2024 (the filing on sec.gov)
Dodge & Cox2,367,680$2.1bn1.32%Trimmed-5,31822 Feb 2024 (the filing on sec.gov)
Wellington Management Group LLP1,102,090$968m0.18%Trimmed-404,79512 Feb 2024 (the filing on sec.gov)
Invesco Ltd765,007$672m0.16%Added+21,65913 Feb 2024 (the filing on sec.gov)
AllianceBernstein LP744,217$654m0.25%Added+51,95914 Feb 2024 (the filing on sec.gov)
T. Rowe Price Associates Inc718,052$631m0.08%Trimmed-1,499,61316 Feb 2024 (the filing on sec.gov)
Neuberger Berman Group LLC465,889$409m0.36%Trimmed-241,92214 Nov 2024 (the filing on sec.gov)
Capital Research Global Investors406,404$357m0.09%Trimmed-6,98513 Feb 2024 (the filing on sec.gov)
D. E. Shaw & Co.364,058$320m0.28%Trimmed-6,36314 Feb 2024 (the filing on sec.gov)
Holocene Advisors LP360,480$317m1.23%Added+182,72714 Feb 2024 (the filing on sec.gov)
Citadel Advisors LLC284,591$250munder 0.1%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Millennium Management LLC280,281$246m0.11%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Renaissance Technologies LLC243,062$213m0.33%Added+81,00013 Feb 2024 (the filing on sec.gov)
MFS Investment Management242,350$213m0.07%Added+6,8798 Feb 2024 (the filing on sec.gov)
AQR Capital Management LLC195,881$172m0.32%Added+5,71214 Feb 2024 (the filing on sec.gov)
Woodline Partners LP170,090$149m1.62%Added+33,51814 Feb 2024 (the filing on sec.gov)
Janus Henderson Group Ltd112,829$99m0.06%Trimmed-9,58414 Feb 2024 (the filing on sec.gov)
Bridgewater Associates LP110,132$97m0.54%Added+49,38314 Feb 2024 (the filing on sec.gov)
Marshall Wace LLP94,526$83m0.14%Trimmed-10,75114 Feb 2024 (the filing on sec.gov)
Man Group PLC93,560$82m0.23%Added+53,17314 Feb 2024 (the filing on sec.gov)
Two Sigma Investments LP65,218$57m0.13%Trimmed-23,49714 Feb 2024 (the filing on sec.gov)
Acadian Asset Management LLC45,285$40m0.15%Trimmed-26,00713 Feb 2024 (the filing on sec.gov)
Squarepoint Ops LLC43,163$38m0.07%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Balyasny Asset Management LLC41,993$37m0.07%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2023 to Q4 2023, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (6)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
31 in Q3 2024 to 22 in Q2 2026

Tracked managers listing it, at least.

0102030402014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
REGN by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201320$8.0bnn.a.n.a.
Q3 201319$10.8bnn.a.n.a.
Q4 201317$8.9bnn.a.n.a.
Q1 201418$8.8bnn.a.n.a.
Q2 201420$8.4bnn.a.n.a.
Q3 201422$10.7bnn.a.n.a.
Q4 201416$12.3bnn.a.n.a.
Q1 201518$13.2bnn.a.n.a.
Q2 201516$14.7bnn.a.n.a.
Q3 201521$12.9bnn.a.n.a.
Q4 201520$15.3bnn.a.n.a.
Q1 201624$11.3bnn.a.n.a.
Q2 201620$10.5bnn.a.n.a.
Q3 201618$12.0bnn.a.n.a.
Q4 201622$10.4bnn.a.n.a.
Q1 201718$10.3bnn.a.n.a.
Q2 201723$13.6bnn.a.n.a.
Q3 201721$11.6bnn.a.n.a.
Q4 201727$9.4bnn.a.n.a.
Q1 201827$8.5bnn.a.n.a.
Q2 201824$9.2bnn.a.n.a.
Q3 201827$10.8bnn.a.n.a.
Q4 201828$9.9bnn.a.n.a.
Q1 201928$10.4bnn.a.n.a.
Q2 201929$8.3bnn.a.n.a.
Q3 201924$7.1bnn.a.n.a.
Q4 201918$9.0bnn.a.n.a.
Q1 202027$13.0bnn.a.n.a.
Q2 202023$19.8bnn.a.n.a.
Q3 202024$17.4bnn.a.n.a.
Q4 202026$15.2bnn.a.n.a.
Q1 202122$13.7bnn.a.n.a.
Q2 202127$15.3bnn.a.n.a.
Q3 202126$15.5bnn.a.n.a.
Q4 202128$16.3bnn.a.n.a.
Q1 202225$19.2bnn.a.n.a.
Q2 202226$16.5bnn.a.n.a.
Q3 202224$19.0bnn.a.n.a.
Q4 202230$20.2bnn.a.n.a.
Q1 202332$22.3bnn.a.n.a.
Q2 202328$18.8bnn.a.n.a.
Q3 202326$21.1bnn.a.n.a.
Q4 202335$21.9bn2214
Q1 202428$23.6bn1220
Q2 202428$25.6bn1515
Q3 202431$25.0bn1715
Q4 202427$13.8bn1712
Q1 202529$12.2bn2010
Q2 202532$9.3bn2410
Q3 202533$10.1bn2212
Q4 202533$16.3bn2023
Q1 202624$15.2bn1426
Q2 202622$10.6bn2415

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

REGN and LLY →REGN and JNJ →REGN and VRTX →Choose a stock to compare with REGN →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own REGN, latest filings →Back to the 13F Explorer →