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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.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Regeneron Pharmaceuticals, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
5 filings
4 insiders, $3.43M in total
Insiders trading
4
Net value
−$3.43M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Regeneron Pharmaceuticals, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Regeneron Pharmaceuticals, Inc.
NameTitleLast reported holdingLast filingFilings, past year
McCourt MarionEVP Commercial12,003Sep 3, 20263
Guarini KathrynDirector603Sep 3, 20263
Larosa Joseph JEVP General Counsel and Secret36,373Aug 21, 20263
Fenimore Christopher R.EVP Finance CFO19,984Aug 20, 20262
Zoghbi Huda YDirector1,703Aug 12, 20263
Ryan Arthur FDirector17,303Jul 7, 20266
Pitofsky JasonSVP Controller4,272Feb 11, 20263
Bassler Bonnie LDirector1,703Jan 8, 20263
Brown Michael SDirector1,703Jan 6, 20261
Poon Christine ADirector5,219Jan 6, 20262
Coles N AnthonyDirector1,714Jan 6, 20261
Sing George LDirector31,007Jan 6, 20262
Goldstein Joseph LDirector6,703Jan 6, 20261
Thompson Craig B.Director775Jan 6, 20261
Schenkein David PDirector603Jan 6, 20261
Schleifer Leonard SBd. Co-Chair, President & CEO214,523Jan 5, 20262
Yancopoulos GeorgeBd. Co-Chair, President & CSO310,460Jan 5, 20262
Van Plew Daniel PEVP & General Mgr, Industrial21,673Dec 11, 20252
Murphy Andrew JEVP Research47,833Dec 11, 20253
Stahl NeilEVP Research and Development48,829Dec 18, 20240
Landry Robert EEVP Finance CFO23,693Feb 6, 20240
Vagelos P RoyDirector125,493IndirectApr 5, 20230
Tessier-Lavigne MarcDirector2,434Jan 5, 20230

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

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
Feb 11, 2026 (view filing)Feb 92 daysRyan Arthur FDirectorSSale−100$778.53−$77.9K−0.6%17.8K after13 lots10b5-1
Jan 8, 2026 (view filing)Jan 71 dayBassler Bonnie LDirectorSSale−1.50K$800.00−$1.20M−46.8%1.70K after10b5-1
Nov 24, 2025 (view filing)Nov 204 daysBassler Bonnie LDirectorSSale−760$750.00−$570.0K−32.9%1.55K after10b5-1
Nov 10, 2025 (view filing)Nov 73 daysPitofsky JasonVP ControllerSSale−431$651.43−$280.8K−9.2%4.23K after
Oct 31, 2025 (view filing)Oct 292 daysPoon Christine ADirectorSSale−6.50K$654.27−$4.25M−73.4%2.35K after6 lots
Nov 5, 2024 (view filing)Nov 14 daysMcCourt MarionEVP CommercialSSale−1.00K$844.61−$844.6K−7.2%12.9K after10b5-1
Oct 3, 2024 (view filing)Oct 12 daysRyan Arthur FDirectorSSale−100$1,048.78−$104.9K−0.6%17.6K after17 lots10b5-1
Oct 3, 2024 (view filing)Oct 12 daysMcCourt MarionEVP CommercialSSale−1.00K$1,054.06−$1.05M−7.2%12.9K after10b5-1
Sep 5, 2024 (view filing)Sep 32 daysMcCourt MarionEVP CommercialSSale−1.00K$1,178.73−$1.18M−7.2%12.9K after10b5-1
Sep 5, 2024 (view filing)Sep 32 daysRyan Arthur FDirectorSSale−100$1,178.69−$117.9K−0.6%17.7K after20 lots10b5-1
Aug 29, 2024 (view filing)Aug 281 dayFenimore Christopher R.SVP Finance & CFOSSale−5.68K$1,205.33−$6.85M−99.6%25 after10 lots
Aug 19, 2024 (view filing)Aug 154 daysBassler Bonnie LDirectorSSale−756$1,170.00−$884.5K−35.4%1.38K after10b5-1
Aug 19, 2024 (view filing)Aug 154 daysPoon Christine ADirectorSSale−10.8K$1,158.17−$12.6M−83.3%2.17K after7 lots
Aug 15, 2024 (view filing)Aug 141 dayMurphy Andrew JEVP ResearchSSale−6.36K$1,153.15−$7.34M−11.6%48.3K after18 lots10b5-1
Aug 12, 2024 (view filing)Aug 84 daysStahl NeilEVP Research and DevelopmentSSale−5.20K$1,084.54−$5.64M−9.2%51.0K after6 lots10b5-1
Aug 7, 2024 (view filing)Aug 7Same dayPitofsky JasonVP ControllerSSale−487$1,070.00−$521.1K−10.4%4.20K after
Aug 5, 2024 (view filing)Aug 14 daysRyan Arthur FDirectorSSale−1$1,100.03−$1.10K0.0%17.8K after10b5-1
Aug 5, 2024 (view filing)Aug 14 daysRyan Arthur FDirectorSSale−99$1,085.53−$107.5K−0.6%17.8K after30 lots10b5-1
Aug 5, 2024 (view filing)Aug 23 daysBassler Bonnie LDirectorSSale−756$1,115.00−$842.9K−35.4%1.38K after10b5-1
Aug 5, 2024 (view filing)Aug 14 daysMcCourt MarionEVP CommercialSSale−1.14K$1,060.86−$1.21M−8.1%12.9K after10b5-1
Jul 12, 2024 (view filing)Jul 111 dayLarosa Joseph JEVP General Counsel and SecretSSale−1.87K$1,088.95−$2.03M−4.7%37.9K after10b5-1
Jul 2, 2024 (view filing)Jul 11 dayMcCourt MarionEVP CommercialSSale−1.14K$1,047.11−$1.19M−8.1%12.9K after10b5-1
Jul 2, 2024 (view filing)Jul 11 dayRyan Arthur FDirectorSSale−100$1,059.24−$105.9K−0.6%17.9K after19 lots10b5-1
Jun 25, 2024 (view filing)Jun 241 dayBassler Bonnie LDirectorSSale−756$1,062.00−$802.9K−35.4%1.38K after10b5-1
Jun 17, 2024 (view filing)Jun 143 daysBrown Michael SDirectorSSale−1.53K$1,040.00−$1.60M−52.6%1.38K after10b5-1
Jun 13, 2024 (view filing)Jun 11-122 daysSchleifer Leonard SBd. Co-Chair, President & CEOSSale−25.2K$1,015.75−$25.6M−100.0%0 after5 lots10b5-1
Jun 10, 2024 (view filing)Jun 64 daysSchleifer Leonard SBd. Co-Chair, President & CEOSSale−787$1,015.02−$798.8K−1.2%64.2K after10b5-1
Jun 7, 2024 (view filing)Jun 52 daysBassler Bonnie LDirectorSSale−827$1,011.00−$836.1K−37.4%1.38K after10b5-1
Jun 5, 2024 (view filing)Jun 32 daysMcCourt MarionEVP CommercialSSale−1.14K$980.16−$1.12M−8.1%12.9K after10b5-1
Jun 5, 2024 (view filing)Jun 32 daysRyan Arthur FDirectorSSale−100$994.50−$99.4K−0.6%18.0K after16 lots10b5-1
May 29, 2024 (view filing)May 281 dayBrown Michael SDirectorSSale−1.17K$974.86−$1.14M−45.9%1.38K after10b5-1
May 22, 2024 (view filing)May 211 dayLarosa Joseph JEVP General Counsel and SecretSSale−1.86K$994.90−$1.86M−5.1%34.7K after10b5-1
May 17, 2024 (view filing)May 161 dayYancopoulos GeorgeBd. Co-Chair, President & CSOSSale−50.0K$972.73−$48.6M−6.0%786.4K after12 lots10b5-1
May 17, 2024 (view filing)May 152 daysYancopoulos GeorgeBd. Co-Chair, President & CSOSSale−50.0K$975.87−$48.8M−5.6%836.4K after25 lots10b5-1
May 17, 2024 (view filing)May 17Same daySchleifer Leonard SBd. Co-Chair, President & CEOSSale−22.8K$979.23−$22.4M−4.7%466.9K after2 lots10b5-1
May 15, 2024 (view filing)May 14-151 daySchleifer Leonard SBd. Co-Chair, President & CEOSSale−35.9K$979.58−$35.2M−8.3%397.3K after12 lots10b5-1
May 3, 2024 (view filing)May 12 daysMcCourt MarionEVP CommercialSSale−250$889.41−$222.4K−1.9%12.9K after10b5-1
May 3, 2024 (view filing)May 12 daysRyan Arthur FDirectorSSale−100$899.61−$90.0K−0.5%18.1K after23 lots10b5-1
May 1, 2024 (view filing)Jan 2120 daysLateYancopoulos GeorgeBd. Co-Chair, President & CSOSSale−16.8K$900.00−$15.2M−8.6%180.0K after10b5-1Duplicate filing
Apr 3, 2024 (view filing)Apr 12 daysRyan Arthur FDirectorSSale−100$962.53−$96.3K−0.5%18.2K after9 lots10b5-1