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Regeneron Pharmaceuticals, Inc.

REGN
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0000872589

In the last 90 days, Regeneron Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 5 sales; 1,341 institutions reported holding it in 13F filings for Q2 2026, worth $57.1B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.

Key figures

Insider buysOpen market, last 90 days
0
Insider sellsLast 90 days, $3.43M in total
5
13F holdersQ2 2026, −44 vs. previous quarter
1,341
13F valueReported value at the end of Q2 2026
$57.1B
Superinvestors holdingAt the end of Q2 2026
1

Price chart

Superinvestors holding REGN, Q2 2026

1 superinvestor reports holding Regeneron Pharmaceuticals, Inc. on Form 13F. Percentages are the stock's share of each portfolio.

Go to the superinvestors tab

Southeastern Asset Management (Longleaf)

Mason Hawkins

5.0%

Regeneron Pharmaceuticals, Inc.'s share of the portfolio

Shares
152,322
Value
$95.0M

Latest insider trades

Open-market purchases and sales by Regeneron Pharmaceuticals, Inc. insiders from Form 4, newest first.

See all insider trades
Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 3, 2026 (view filing)4:50 PM ETSep 2-31 dayMcCourt MarionEVP CommercialSSale−2.35K$853.56−$2.00M−16.3%12.0K after2 lots10b5-1
Sep 3, 2026 (view filing)4:47 PM ETSep 21 dayGuarini KathrynDirectorSSale−400$850.00−$340.0K−39.9%603 after10b5-1
Aug 12, 2026 (view filing)4:16 PM ETAug 102 daysGuarini KathrynDirectorSSale−400$800.00−$320.0K−39.9%603 after10b5-1
Aug 12, 2026 (view filing)4:14 PM ETAug 102 daysZoghbi Huda YDirectorSSale−800$800.00−$640.0K−32.0%1.70K after10b5-1
Jul 7, 2026 (view filing)4:05 PM ETJul 25 daysRyan Arthur FDirectorSSale−200$650.15−$130.0K−1.1%17.3K after10b5-1
May 4, 2026 (view filing)May 13 daysRyan Arthur FDirectorSSale−100$705.24−$70.5K−0.6%17.5K after12 lots10b5-1
Apr 3, 2026 (view filing)Apr 12 daysRyan Arthur FDirectorSSale−100$777.27−$77.7K−0.6%17.6K after9 lots10b5-1
Mar 3, 2026 (view filing)Mar 21 dayRyan Arthur FDirectorSSale−100$785.50−$78.5K−0.6%17.7K after13 lots10b5-1
Feb 23, 2026 (view filing)Feb 194 daysZoghbi Huda YDirectorSSale−1.64K$781.33−$1.28M−49.0%1.70K after11 lots10b5-1
Feb 11, 2026 (view filing)Feb 92 daysPitofsky JasonSVP ControllerSSale−2.04K$778.52−$1.59M−32.3%4.27K after11 lots10b5-1

Top 10 13F holders, Q2 2026

The largest institutional positions in Regeneron Pharmaceuticals, Inc. at the end of Q2 2026; share changes are against Q1 2026.

See all 1,341 holders
Institutions holding REGN in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
BlackRock, Inc.9,113,506$5.68B0.08%+165,771+1.9%Added
Vanguard Capital Management LLC6,629,759$4.13B0.09%−25,154−0.4%Reduced
Dodge & Cox4,871,137$3.04B1.59%+412,899+9.3%Added
State Street Corp4,834,688$3.01B0.09%+170,210+3.6%Added
Invesco Ltd.3,940,665$2.46B0.19%+35,556+0.9%Added
JPMorgan Chase & Co3,774,199$2.38B0.14%−537,607−12.5%Reduced
Vanguard Portfolio Management LLC3,175,313$1.98B0.09%+1,454,539+84.5%Added
Franklin Resources Inc2,771,839$1.73B0.37%+49,768+1.8%Added
Geode Capital Management, LLC2,625,810$1.63B0.09%+18,078+0.7%Added
Nuveen, LLC2,019,974$1.26B0.30%−45,090−2.2%Reduced