Leonard S. Schleifer is CEO & President at REGENERON PHARMACEUTICALS, INC. (REGN). They have made 5 open-market trades across 1 company since 2006, most recently 2025-12-31.
CIK 0001218629
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| REGN | 243,093 | $192.3M |
Shares reported on the most recent Form 4, priced at the 2026-01-05 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| REGN | SELL · 10b5-1 | 2024-06-11 | 2024-06-13 | $1015.56 | $50.2M | +4.4% | +5.6% | +11.4% |
| REGN | SELL · 10b5-1 | 2024-06-06 | 2024-06-10 | $1015.02 | $1.6M | +5.5% | +7.3% | +14.7% |
| REGN | SELL · 10b5-1 | 2024-05-17 | 2024-05-17 | $979.23 | $44.7M | -1.1% | +6.6% | +19.9% |
| REGN | SELL · 10b5-1 | 2024-05-14 | 2024-05-15 | $979.56 | $70.1M | -0.5% | +6.0% | +18.4% |
| REGN | SELL | 2022-04-05 | 2022-04-07 | $710.05 | $10.1M | -0.7% | -17.3% | -17.9% |
| REGN | SELL | 2022-03-31 | 2022-04-04 | $710.01 | $4.1M | +5.2% | -5.2% | -14.4% |
| REGN | SELL | 2021-08-18 | 2021-08-20 | $650.51 | $136.6M | +2.4% | -3.7% | -2.5% |
| REGN | SELL | 2021-08-16 | 2021-08-17 | $624.37 | $12.5M | +2.0% | +0.5% | -0.3% |
| REGN | SELL | 2020-05-12 | 2020-05-13 | $569.22 | $171.8M | -5.5% | +1.9% | +3.8% |
| REGN | SELL · 10b5-1 | 2015-01-02 | 2015-01-05 | $410.58 | $616K | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2014-11-11 | 2014-11-12 | $400.30 | $18.3M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2014-10-31 | 2014-11-04 | $400.11 | $1.4M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2014-10-28 | 2014-10-29 | $404.01 | $27.9M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2013-10-02 | 2013-10-03 | $313.82 | $2.9M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2013-09-19 | 2013-09-20 | $302.67 | $31.2M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2013-09-09 | 2013-09-11 | $275.47 | $1.4M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2013-05-01 | 2013-05-03 | $237.65 | $23.8M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2013-03-19 | 2013-03-21 | $175.02 | $640K | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2013-03-13 | 2013-03-15 | $175.01 | $816K | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2013-03-05 | 2013-03-07 | $175.33 | $16.1M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2012-05-01 | 2012-05-02 | $134.83 | $13.5M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2011-09-06 | 2011-09-08 | $66.03 | $522K | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2006-11-07 | 2006-11-08 | $23.13 | $1.2M | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2006-10-17 | 2006-10-18 | $18.00 | $540K | -13.6% | -2.9% | -2.9% |
| REGN | SELL · 10b5-1 | 2006-09-13 | 2006-10-18 | $16.53 | $263K | -13.6% | -2.9% | -2.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.