$REGN

$807.84 +$2.82 (0.35%) Live

$REGN Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 102.8M shares outstanding

Who owns REGN?

By type of holder

Institutions 88.7% Insiders 3.4% Everyone else 7.9%

Concentration Top 10 holders own 42.8%

BlackRock, Inc. 8.9% · Vanguard Capital Management LLC 6.5%

Institutional ownership

88.7%

+0.6 pts vs last qtr

Institutional holders

1,327

-67 vs last qtr

Net shares bought

+644.2K

by institutions in Q2 2026

New / sold out

122 / 189

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Vanguard Portfolio Management LLC +1.5M
Norges Bank NEW +1.2M

Biggest sellers in Q2 2026

FMR LLC −686.2K
Price T Rowe Associates Inc /MD/ −647.8K

Who is planning to sell?

Notices of proposed sale, last 12 months

$12M

13 notices from 8 people

Shares covered

15.3K

0.01% of the company

Arranged in advance

98%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Murphy Andrew J Officer 10b5-1 $3.2M
McCourt Marion Officer 10b5-1 $2M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−6.6%

−0.76% a year

Each share's claim on the business

+7.1%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$18.1B vs $6.58B

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years80% 3–5 years8% 1–3 years8% Under 1 year5%

Quarterly turnover

9.4%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting REGN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	9.1M	8.87%	+165.8K (+1.9%)	≤2021	0.1%
Shares held by quarter Peak holding9.3M (Q2'25) Change over 8 quarters+633.2K Share of the company8.870% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	6.6M	6.45%	−25.2K (−0.4%)	≤2021	0.1%
Shares held by quarter Peak holding6.7M (Q1'26) Change over 8 quarters+6.6M Share of the company6.450% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

9.1M

% of company

8.87%

Change vs last qtr

+165.8K (+1.9%)

Held since

≤2021

Vanguard Capital Management LLC

6.6M

% of company

6.45%

Change vs last qtr

−25.2K (−0.4%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Regeneron Pharmaceuticals Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting REGN on Form N-PORT; together they hold 40.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$2.04B	3.3M	3.18%	0.09%	June 30, 2026
DC Dodge & Cox Stock Fund Dodge & Cox Funds	$1.95B	3.1M	3.04%	1.64%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$2.04B

% of company

3.18%

% of the fund

0.09%

As of

June 30, 2026

Dodge & Cox Stock Fund

Dodge & Cox Funds

Position value

$1.95B

% of company

3.04%

% of the fund

1.64%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Regeneron Pharmaceuticals Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
YG Yancopoulos George Insider	2.3M	2.20%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company2.200% Yancopoulos George's insider activity →
SL Schleifer Leonard S Insider	853.8K	0.83%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.830% Schleifer Leonard S's insider activity →

Yancopoulos George

Insider

2.3M

% of company

2.20%

Change vs last qtr

—

Held since

—

Schleifer Leonard S

Insider

853.8K

% of company

0.83%

Change vs last qtr

—

Held since

—

18 more holders behind a free account

See every insider and 5%+ holder of Regeneron Pharmaceuticals Inc.

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