Michael S. Brown is Director at REGENERON PHARMACEUTICALS, INC. (REGN). They have made 30 open-market trades across 1 company since 2006, most recently 2026-10-30.
CIK 0001174475
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 30 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| REGN | 1,380 | $1.3M |
Shares reported on the most recent Form 4, priced at the 2026-11-03 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| REGN | SELL · 10b5-1 | 2026-10-30 | 2026-11-03 | $875.00 | $1.7M | — | — | — |
| REGN | SELL · 10b5-1 | 2024-06-14 | 2024-06-17 | $1040.00 | $1.6M | +0.4% | +3.7% | +10.2% |
| REGN | SELL · 10b5-1 | 2024-05-28 | 2024-05-29 | $974.86 | $2.3M | +3.7% | +8.8% | +24.5% |
| REGN | SELL · 10b5-1 | 2023-12-27 | 2023-12-29 | $898.00 | $1.8M | +4.8% | +9.4% | +10.1% |
| REGN | SELL · 10b5-1 | 2023-04-21 | 2023-04-24 | $798.42 | $4.9M | -5.4% | -7.5% | -8.8% |
| REGN | SELL | 2023-02-06 | 2023-02-08 | $797.86 | $2.8M | -0.6% | -0.6% | +0.5% |
| REGN | SELL · 10b5-1 | 2023-01-27 | 2023-01-30 | $747.00 | $747 | +0.7% | +4.2% | +9.1% |
| REGN | SELL | 2023-01-06 | 2023-01-10 | $747.14 | $4.6M | +4.4% | +6.6% | +17.9% |
| REGN | SELL | 2022-11-08 | 2022-11-10 | $753.53 | $5.3M | +1.8% | +0.9% | +1.9% |
| REGN | SELL | 2022-03-29 | 2022-03-31 | $699.00 | $1.3M | +2.0% | -7.1% | -14.8% |
| REGN | SELL | 2022-02-23 | 2022-02-24 | $608.68 | $304K | +0.7% | +13.5% | +13.1% |
| REGN | SELL | 2021-09-13 | 2021-09-15 | $648.41 | $10.5M | -4.7% | -14.8% | +3.3% |
| REGN | SELL | 2021-08-09 | 2021-08-10 | $612.38 | $2.1M | +7.7% | +4.9% | +1.1% |
| REGN | SELL | 2021-06-25 | 2021-06-28 | $549.00 | $1.1M | +7.2% | +8.3% | +14.4% |
| REGN | SELL | 2021-06-14 | 2021-06-16 | $525.00 | $893K | +3.6% | +11.3% | +23.1% |
| REGN | SELL | 2021-01-25 | 2021-01-27 | $554.32 | $2.7M | -5.1% | -13.6% | -5.7% |
| REGN | SELL | 2020-09-22 | 2020-09-23 | $552.36 | $6.2M | +7.9% | +3.4% | -12.6% |
| REGN | SELL | 2020-07-01 | 2020-07-02 | $606.83 | $3.7M | -0.4% | +1.6% | -11.8% |
| REGN | SELL | 2020-05-07 | 2020-05-07 | $562.00 | $1.0M | -0.8% | +7.5% | +11.1% |
| REGN | SELL | 2020-02-24 | 2020-02-25 | $419.00 | $838K | +11.4% | +1.9% | +22.8% |
| REGN | SELL | 2019-12-13 | 2019-12-13 | $373.99 | $3.0M | +1.9% | +3.0% | +17.4% |
| REGN | SELL | 2019-11-12 | 2019-11-13 | $349.00 | $1.6M | +4.9% | +7.6% | +13.4% |
| REGN | SELL | 2018-09-27 | 2018-09-28 | $392.14 | $1.4M | -6.0% | -17.3% | -10.2% |
| REGN | SELL | 2018-08-22 | 2018-08-23 | $380.49 | $571K | +7.6% | +3.1% | -9.3% |
| REGN | SELL | 2017-10-05 | 2017-10-05 | $475.00 | $713K | -4.5% | -12.2% | -15.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.