George L. Sing is Director at REGENERON PHARMACEUTICALS, INC. (REGN). They have made 36 open-market trades across 1 company since 2009, most recently 2026-11-02.
CIK 0001225471
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.
2 open-market purchases totalling $448K since 2009, against 34 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| REGN | 25,147 | $23.4M |
Shares reported on the most recent Form 4, priced at the 2026-11-04 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| REGN | SELL | 2026-11-02 | 2026-11-04 | $964.38 | $20.4M | — | — | — |
| REGN | SELL | 2024-02-26 | 2024-02-28 | $992.50 | $993K | -2.6% | -2.1% | -1.7% |
| REGN | SELL | 2024-02-22 | 2024-02-26 | $967.86 | $3.4M | -1.6% | -2.3% | -1.6% |
| REGN | SELL | 2024-02-08 | 2024-02-12 | $950.00 | $950K | +3.7% | +2.0% | +3.3% |
| REGN | SELL | 2022-02-25 | 2022-03-01 | $618.25 | $2.5M | +6.2% | +15.5% | +9.9% |
| REGN | SELL | 2021-11-19 | 2021-11-23 | $656.67 | $2.0M | -4.0% | -4.0% | -7.4% |
| REGN | SELL | 2021-11-16 | 2021-11-18 | $653.50 | $7.0M | -3.3% | -7.6% | -3.3% |
| REGN | SELL | 2021-08-26 | 2021-08-30 | $672.00 | $1.1M | -4.0% | -10.5% | -3.4% |
| REGN | SELL | 2021-08-16 | 2021-08-17 | $628.53 | $1.1M | +2.0% | +0.5% | -0.3% |
| REGN | SELL | 2021-08-11 | 2021-08-13 | $617.89 | $2.3M | +7.0% | +2.2% | +0.2% |
| REGN | SELL | 2021-08-06 | 2021-08-10 | $612.08 | $6.1M | +7.7% | +4.9% | +1.1% |
| REGN | SELL | 2020-08-31 | 2020-08-31 | $612.06 | $6.1M | -11.5% | -9.1% | -16.2% |
| REGN | SELL | 2020-08-25 | 2020-08-27 | $607.33 | $30.5M | -6.5% | -6.4% | -16.8% |
| REGN | SELL | 2020-08-20 | 2020-08-24 | $605.54 | $67.0M | -3.2% | -5.3% | -12.2% |
| REGN | SELL | 2020-07-07 | 2020-07-08 | $650.06 | $7.3M | +1.6% | -4.3% | -10.2% |
| REGN | SELL | 2020-06-29 | 2020-06-29 | $608.80 | $2.0M | -0.2% | +1.6% | -8.0% |
| REGN | SELL | 2020-05-28 | 2020-06-01 | $587.76 | $1.2M | -1.0% | +1.2% | +2.9% |
| REGN | SELL | 2020-05-11 | 2020-05-13 | $579.50 | $3.2M | -5.5% | +1.9% | +3.8% |
| REGN | SELL | 2020-02-26 | 2020-02-28 | $456.49 | $2.2M | +4.4% | +6.3% | +29.9% |
| REGN | SELL | 2020-01-02 | 2020-01-06 | $371.98 | $5.6M | +3.8% | +0.2% | +35.7% |
| REGN | SELL | 2018-05-09 | 2018-05-11 | $285.93 | $7.7M | -3.8% | +1.6% | +21.2% |
| REGN | SELL | 2015-11-18 | 2015-11-20 | $580.00 | $2.0M | -13.6% | -2.9% | -27.2% |
| REGN | SELL | 2015-05-27 | 2015-05-29 | $515.00 | $2.6M | -13.6% | -2.9% | -2.9% |
| REGN | SELL | 2015-02-20 | 2015-02-24 | $423.12 | $6.3M | -13.6% | -2.9% | -2.9% |
| REGN | SELL | 2014-02-21 | 2014-02-24 | $339.00 | $5.1M | -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.