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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 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 5 Feb 2026
Managers listing it
40
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 31 listed it in both
Shares listed
21,401,177
combined, among listed positions
Reported value
$16.5bn
combined, at the quarter end

Among the 92 comparable managers: 20 buyers (opened or added shares) and 23 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +2,784,775.

Managers listing REGN in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

40 of 40 holders

ActionFiling
Dodge & Cox4,596,358$3.5bn1.92%Added+45,51313 Feb 2026 (the filing on sec.gov)
Invesco Ltd3,911,496$3.0bn0.28%Added+2,427,02319 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)2,319,566$1.8bn0.09%Added+383,73117 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,949,797$1.5bn0.16%Added+1,144,88717 Feb 2026 (the filing on sec.gov)
Capital World Investors1,398,003$1.1bn0.15%Trimmed-600,36311 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC995,710$769m0.40%Added+274,35617 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP664,465$513m0.09%Added+656,84517 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP604,540$467m0.91%Trimmed-321,66017 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP478,551$369m0.34%Added+91,66713 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP478,389$369m0.12%Trimmed-45,49417 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP460,723$356m0.75%Added+308,99017 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC445,795$344m0.56%Trimmed-138,71010 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC422,127$326m0.24%Added+6,41327 Oct 2026 (the filing on sec.gov)
Millennium Management LLC379,768$293m0.12%Added+178,68817 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP281,151$217m0.31%Trimmed-188,75217 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP262,527$203m0.23%Added+61,02817 Feb 2026 (the filing on sec.gov)
Man Group PLC218,112$168m0.29%Trimmed-53,59517 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd205,672$159m0.07%Added+131,92917 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP194,695$150m0.09%Added+2,11113 Feb 2026 (the filing on sec.gov)
Southeastern Asset Management Inc165,792$128m5.70%Added+21,18513 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.155,475$120m0.07%Trimmed-706,11817 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC144,970$112munder 0.1%Trimmed-85,25717 Feb 2026 (the filing on sec.gov)
Capital Research Global Investors103,336$80munder 0.1%Trimmed-2,41311 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP92,461$71munder 0.1%Trimmed-97,71517 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP72,745$56m0.20%Trimmed-162,63613 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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 (1)

Exited (3)

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 →