Leonard S Schleifer Regeneron Pharmaceuticals, Inc. (REGN) insider trading activity

Leonard S Schleifer is Bd. Co-Chair, President & CEO of REGENERON PHARMACEUTICALS, INC.. Currently has a direct ownership of 214,523 shares of REGN, which is worth approximately $149 Million. The most recent transaction as insider was on Dec 09, 2025, when has been sold 155,145 shares (Common Stock) at a price of $701.51 per share, resulting in proceeds of $108,835,768. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 215K

54.05% 3M change

54.05% 12M change

Total Value Held $149 Million

LEONARD S SCHLEIFER Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Dec 09 2025	SELL Payment of exercise price or tax liability	$108,835,768 $701.51 p/Share	155,145 Reduced 41.97%	214,523 Common Stock
Dec 09 2025	BUY Exercise of conversion of derivative security	$95,976,989 $555.67 p/Share	172,723 Added 31.84%	369,668 Common Stock
May 17 2024	SELL Open market or private sale	$22,365,181 $979.64 p/Share	22,830 Reduced 4.66%	466,877 Common Stock
May 15 2024	SELL Open market or private sale	$10,766,272 $984.03 p/Share	10,941 Reduced 2.68%	397,259 Common Stock
May 14 2024	SELL Open market or private sale	$24,490,750 $979.63 p/Share	25,000 Reduced 5.77%	408,200 Common Stock
May 13 2024	SELL Payment of exercise price or tax liability	$141,080,710 $976.79 p/Share	144,433 Reduced 25.0%	433,200 Common Stock
May 13 2024	BUY Exercise of conversion of derivative security	$81,212,510 $399.66 p/Share	203,204 Added 26.02%	577,633 Common Stock

Dec 11 2023	SELL Payment of exercise price or tax liability	$10,838,959 $844.09 p/Share	12,841 Reduced 3.32%	374,429 Common Stock
Dec 11 2023	BUY Exercise of conversion of derivative security	-	25,155 Added 6.1%	387,270 Common Stock
Nov 19 2021	SELL Payment of exercise price or tax liability	$234,142,966 $651.96 p/Share	359,137 Reduced 43.53%	465,922 Common Stock
Nov 19 2021	BUY Exercise of conversion of derivative security	$116,955,956 $224.78 p/Share	520,313 Added 44.4%	651,568 Common Stock
Aug 18 2021	SELL Open market or private sale	$130,006,006 $650.03 p/Share	200,000 Reduced 39.62%	304,746 Common Stock
Aug 06 2021	SELL Payment of exercise price or tax liability	$138,861,600 $607.51 p/Share	228,575 Reduced 31.17%	504,746 Common Stock
Aug 06 2021	BUY Exercise of conversion of derivative security	$20,812,000 $52.03 p/Share	400,000 Added 40.15%	596,176 Common Stock
May 12 2020	SELL Open market or private sale	$85,646,725 $567.49 p/Share	150,922 Reduced 24.13%	474,499 Common Stock
May 11 2020	SELL Payment of exercise price or tax liability	$92,330,516 $571.43 p/Share	161,578 Reduced 20.53%	625,421 Common Stock
May 11 2020	BUY Exercise of conversion of derivative security	$9,571,875 $30.63 p/Share	312,500 Added 30.2%	722,368 Common Stock

LSS

Leonard S Schleifer

Bd. Co-Chair, President & CEO

Tarrytown, NY

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