SCHLEIFER LEONARD S (CIK 1218629) reported 4 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-01-05). Recent activity: Buy REGN (28,570 shares), Sell REGN (28,570 shares), Buy REGN (172,723 shares), Sell REGN (155,145 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-05 | REGENERON PHARMACEUTICALS, INC. (REGN) | Bd. Co-Chair, President & CEO | Buy | 28,570 | $0 |
| 2026-01-05 | REGENERON PHARMACEUTICALS, INC. (REGN) | Bd. Co-Chair, President & CEO | Sell | 28,570 | $22.1M |
| 2025-12-11 | REGENERON PHARMACEUTICALS, INC. (REGN) | Bd. Co-Chair, President & CEO | Buy | 172,723 | $96.0M |
| 2025-12-11 | REGENERON PHARMACEUTICALS, INC. (REGN) | Bd. Co-Chair, President & CEO | Sell | 155,145 | $108.8M |
Source: SEC Form 4 filings · as of 2026-01-05