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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 Mar 2025
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 7 May 2025
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q4 2024 and Q1 2025; 23 listed it in both
Shares listed
19,224,283
combined, among listed positions
Reported value
$12.2bn
combined, at the quarter end

Among the 95 comparable managers: 20 buyers (opened or added shares) and 10 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 Q1 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Fidelity (FMR LLC)7,598,584$4.8bn0.31%Trimmed-600,9955 Nov 2026 (the filing on sec.gov)
Dodge & Cox2,324,085$1.5bn0.84%Added+2,76914 May 2025 (the filing on sec.gov)
T. Rowe Price Associates Inc2,175,026$1.4bn0.17%Added+89,57914 May 2025 (the filing on sec.gov)
Capital World Investors1,938,634$1.2bn0.20%Trimmed-840,34612 May 2025 (the filing on sec.gov)
Invesco Ltd850,746$540m0.10%Trimmed-13,50312 May 2025 (the filing on sec.gov)
AllianceBernstein LP609,608$387m0.14%Trimmed-13,54815 May 2025 (the filing on sec.gov)
D. E. Shaw & Co.578,889$367m0.33%Added+78,65915 May 2025 (the filing on sec.gov)
Two Sigma Advisers LP553,800$351m0.79%Newnew15 May 2025 (the filing on sec.gov)
Neuberger Berman Group LLC436,508$277m0.23%Trimmed-26,02127 Oct 2026 (the filing on sec.gov)
Two Sigma Investments LP372,071$236m0.50%Added+337,52815 May 2025 (the filing on sec.gov)
Squarepoint Ops LLC284,003$180m0.22%Added+29,42427 Aug 2025 (the filing on sec.gov)
AQR Capital Management LLC235,950$149m0.15%Added+28,86515 May 2025 (the filing on sec.gov)
Voloridge Investment Management LLC228,270$145m0.54%Added+16,14215 May 2025 (the filing on sec.gov)
Millennium Management LLC169,585$108m0.06%Added+36,07815 May 2025 (the filing on sec.gov)
Acadian Asset Management LLC139,157$88m0.25%Added+56,81621 May 2025 (the filing on sec.gov)
Tudor Investment Corp126,093$80m0.27%Added+97,52315 May 2025 (the filing on sec.gov)
Southeastern Asset Management Inc114,880$73m3.88%Newnew15 May 2025 (the filing on sec.gov)
Woodline Partners LP106,217$67m0.44%Added+2,93815 May 2025 (the filing on sec.gov)
Viking Global Investors LP97,739$62m0.20%Newnew15 May 2025 (the filing on sec.gov)
Capital Research Global Investors82,113$52munder 0.1%Newnew12 May 2025 (the filing on sec.gov)
Renaissance Technologies LLC78,901$50m0.08%Trimmed-168,84214 May 2025 (the filing on sec.gov)
Man Group PLC35,586$23m0.06%Trimmed-55815 May 2025 (the filing on sec.gov)
Bridgewater Associates LP20,991$13m0.06%Addedn.a.14 May 2025 (the filing on sec.gov)
Hudson Bay Capital Management LP20,587$13munder 0.1%Added+5,58114 May 2025 (the filing on sec.gov)
Verition Fund Management LLC20,124$13m0.06%Trimmed-6,18715 May 2025 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2024 to Q1 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 (5)

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 →