Schleifer Leonard S (CIK 0001218629)

No recent ownership filings for this insider.

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Dec 9, 2025 Dec 11, 2025 REGENERON PHARMACEUTICALS, INC. CEO Sell 15.0 -155,145 -18.40% $108.8M
Jun 11, 2024 Jun 13, 2024 REGENERON PHARMACEUTICALS, INC. CEO Sell 30.0 -25,213 -3.62% $25.6M
Jun 6, 2024 Jun 10, 2024 REGENERON PHARMACEUTICALS, INC. CEO Sell 47.5 -787 -0.11% $798.8K
May 17, 2024 May 17, 2024 REGENERON PHARMACEUTICALS, INC. CEO Sell 30.0 -22,830 -3.18% $22.4M
May 13, 2024 May 15, 2024 REGENERON PHARMACEUTICALS, INC. CEO Sell 7.5 -180,374 -20.07% $176.3M
Dec 11, 2023 Dec 13, 2023 REGENERON PHARMACEUTICALS, INC. CEO Sell 15.0 -12,841 -1.81% $10.8M
Apr 5, 2022 Apr 7, 2022 REGENERON PHARMACEUTICALS, INC. CEO Sell 38.8 -7,114 -1.03% $5.1M
Mar 31, 2022 Apr 4, 2022 REGENERON PHARMACEUTICALS, INC. CEO Sell 43.8 -2,886 -0.42% $2M
Nov 19, 2021 Nov 19, 2021 REGENERON PHARMACEUTICALS, INC. CEO Sell 15.0 -359,137 -25.25% $234.1M
Aug 18, 2021 Aug 20, 2021 REGENERON PHARMACEUTICALS, INC. CEO Sell 2.5 -210,000 -28.31% $136.6M
Aug 16, 2021 Aug 17, 2021 REGENERON PHARMACEUTICALS, INC. CEO Sell 38.8 -10,000 -1.33% $6.2M
Aug 6, 2021 Aug 10, 2021 REGENERON PHARMACEUTICALS, INC. CEO Sell 12.5 -228,575 -16.14% $138.9M
May 11, 2020 May 13, 2020 REGENERON PHARMACEUTICALS, INC. CEO Sell 33.8 -312,500 -2.35% $178.2M
Dec 12, 2019 Dec 13, 2019 REGENERON PHARMACEUTICALS, INC. CEO Sell 17.5 -161,963 -14.38% $61.1M
Dec 13, 2018 Dec 14, 2018 REGENERON PHARMACEUTICALS, INC. CEO Sell 12.5 -160,131 -16.81% $60.4M
Dec 13, 2017 Dec 13, 2017 REGENERON PHARMACEUTICALS, INC. CEO Sell 2.5 -135,816 -32.87% $52.3M
Dec 15, 2016 Dec 19, 2016 REGENERON PHARMACEUTICALS, INC. CEO Sell 2.5 -135,397 -45.36% $51.5M