Free · no sign-up · Q2 2026

Which funds own REGN

Regeneron Pharmaceuticals in the Q2 2026 filings. At least 17 of the 91 current managers on file reported a position, worth $9.9bn between them. It is among the largest positions of fewer than a fifth of the current managers on file. The quarter went one way: 11 managers opened or added against 8 cutting.

Managers holding: 17; at least, of 91 current
Combined value: $9.9bn; as reported
Opened: 0; new this quarter
Added to: 11; already held
Trimmed or sold out: 8; 2 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Dodge & Cox Value · $191bn book	$3.0bn	1.6%	4,871,137	-$407m+412,899	Added
Invesco Ltd Long-only · $1264bn book	$2.5bn	0.2%	3,940,665	-$560m+35,556	Added
T. Rowe Price Associates Inc Long-only · $999bn book	$954m	0.1%	1,529,709	-$729m-647,818	Trimmed
Wellington Management Group LLP Long-only · $580bn book	$792m	0.1%	1,270,087	-$628m-567,372	Trimmed
AQR Capital Management LLC Quantitative · $287bn book	$702m	0.2%	1,126,080	-$244m-104,928	Trimmed
Two Sigma Investments LP Quantitative · $138bn book	$409m	0.3%	656,124	-$218m-156,112	Trimmed
Man Group PLC Quantitative · $62.7bn book	$273m	0.4%	436,956	+$29m+121,744	Added
Neuberger Berman Group LLC Long-only · $150bn book	$263m	0.2%	421,976	-$67m-5,153	Trimmed
Arrowstreet Capital LP Quantitative · $225bn book	$246m	0.1%	393,685	+$113m+222,114	Added
AllianceBernstein LP Long-only · $302bn book	$226m	0.1%	292,338	-$104m-134,576	Trimmed
Squarepoint Ops LLC Multi-strategy · $90.5bn book	$124m	0.1%	198,567	-$2.0m+35,753	Added
Voloridge Investment Management LLC Quantitative · $23.5bn book	$102m	0.4%	163,963	+$90m+148,599	Added
Acadian Asset Management LLC Quantitative · $84.2bn book	$98m	0.1%	157,440	-$19m+6,249	Added
Southeastern Asset Management Inc Value · $1.9bn book	$95m	5.0%	152,322	-$6.0m+21,660	Added
Renaissance Technologies LLC Quantitative · $72.6bn book	$92m	0.1%	148,222	+$41m+81,420	Added
Woodline Partners LP Long/short equity · $32.4bn book	$45m	0.1%	72,595	-$7.1m+4,844	Added
Bridgewater Associates LP Macro · $24.4bn book	$32m	0.1%	51,333	+$15m+28,609	Added

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

Capital Research Global Investors · Long-only$79m held before
Freestone Grove Partners LP · Multi-strategy$24m held before

Ownership through time

At least 22 of the 95 managers whose filings are on file listed REGN in Q2 2026, against 20 in Q2 2013. 2 managers fewer than in Q1 2026: 1 listed it again; 1 sold out, by its own filing; 2 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

No manager on file started a position.

Largest increases, by shares

Dodge & Cox4,458,238 to 4,871,137 shares+$257m
Arrowstreet Capital LP171,571 to 393,685 shares+$138m
Voloridge Investment Management LLC15,364 to 163,963 shares+$93m
Man Group PLC315,212 to 436,956 shares+$76m
Renaissance Technologies LLC66,802 to 148,222 shares+$51m

Largest decreases, by shares

T. Rowe Price Associates Inc2,177,527 to 1,529,709 shares-$404m
Capital World Investors1,419,000 to 814,925 shares-$377m
Wellington Management Group LLP1,837,459 to 1,270,087 shares-$354m
AllianceBernstein LP426,914 to 292,338 shares-$104m
Two Sigma Investments LP812,236 to 656,124 shares-$97m

Left it

Capital Research Global Investorswas $79m

Manager	First listed	Largest	Q2 2026
Dodge & Cox	Q4 2021	$3.5bn	$3.0bn
Invesco Ltd	Q2 2013	$3.0bn	$2.5bn
T. Rowe Price Associates Inc	Q2 2013	$2.6bn	$954m
Wellington Management Group LLP	Q2 2013	$2.8bn	$792m
AQR Capital Management LLC	Q3 2013	$946m	$702m
Capital World Investors	Q2 2013	$4.9bn	$508m
Two Sigma Investments LP	Q2 2013	$628m	$409m
Man Group PLC	Q1 2020	$272m	$272m
Neuberger Berman Group LLC	Q2 2013	$583m	$263m
Arrowstreet Capital LP	Q4 2018	$245m	$245m
AllianceBernstein LP	Q2 2013	$983m	$226m
Squarepoint Ops LLC	Q1 2016	$181m	$124m
Voloridge Investment Management LLC	Q1 2015	$151m	$102m
Acadian Asset Management LLC	Q3 2018	$344m	$98m
Southeastern Asset Management Inc	Q1 2025	$128m	$95m
Fidelity (FMR LLC)	Q2 2013	$11.2bn	last listed Q1 2026
Harris Associates LP	Q1 2018	$1.6bn	last listed Q2 2023
Polen Capital Management LLC	Q2 2013	$1.2bn	last listed Q1 2022
Artisan Partners LP	Q2 2013	$1.1bn	last listed Q4 2017
Viking Global Investors LP	Q1 2014	$837m	last listed Q1 2025
Capital Research Global Investors	Q1 2023	$678m	last listed Q1 2026
ARK Investment Management LLC	Q4 2016	$577m	last listed Q4 2025
MFS Investment Management	Q2 2013	$568m	last listed Q3 2024
Two Sigma Advisers LP	Q2 2013	$521m	last listed Q4 2025
D. E. Shaw & Co.	Q3 2013	$484m	last listed Q4 2025

What REGN is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around REGN →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

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