Joseph J. Larosa is CLO & VP at REGENERON PHARMACEUTICALS, INC. (REGN). They have made 13 open-market trades across 1 company since 2015, most recently 2026-08-19.
CIK 0001238303
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 13 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| REGN | 36,373 | $28.8M |
Shares reported on the most recent Form 4, priced at the 2026-08-21 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| REGN | SELL · 10b5-1 | 2024-07-11 | 2024-07-12 | $1088.95 | $4.1M | -3.3% | +2.2% | -9.0% |
| REGN | SELL · 10b5-1 | 2024-05-21 | 2024-05-22 | $994.90 | $3.7M | +0.8% | +6.9% | +21.0% |
| REGN | SELL | 2024-02-26 | 2024-02-28 | $990.00 | $990K | -2.6% | -2.1% | -1.7% |
| REGN | SELL | 2024-02-22 | 2024-02-26 | $967.65 | $968K | -1.6% | -2.3% | -1.6% |
| REGN | SELL | 2024-02-07 | 2024-02-09 | $950.00 | $950K | +1.3% | +1.3% | +1.6% |
| REGN | SELL | 2022-04-07 | 2022-04-11 | $721.10 | $7.4M | -4.5% | -14.9% | -14.7% |
| REGN | SELL | 2022-04-01 | 2022-04-04 | $690.67 | $7.0M | +5.2% | -5.2% | -14.4% |
| REGN | SELL | 2021-08-23 | 2021-08-24 | $661.82 | $4.5M | +1.0% | -3.9% | -4.3% |
| REGN | SELL | 2021-07-06 | 2021-07-07 | $580.00 | $2.0M | +1.2% | +5.6% | -4.8% |
| REGN | SELL | 2020-08-31 | 2020-08-31 | $615.04 | $5.7M | -11.5% | -9.1% | -16.2% |
| REGN | SELL | 2020-05-15 | 2020-05-15 | $572.00 | $4.8M | -0.7% | +1.5% | +5.0% |
| REGN | SELL | 2020-04-20 | 2020-04-20 | $570.25 | $2.0M | -7.1% | +1.9% | +16.3% |
| REGN | SELL | 2020-04-17 | 2020-04-20 | $562.58 | $6.3M | -7.1% | +1.9% | +16.3% |
| REGN | SELL | 2020-04-15 | 2020-04-16 | $518.27 | $2.3M | -3.9% | +1.9% | +15.0% |
| REGN | SELL | 2020-04-02 | 2020-04-03 | $489.77 | $6.3M | +7.3% | +7.6% | +23.7% |
| REGN | SELL · 10b5-1 | 2015-03-16 | 2015-03-17 | $450.00 | $8.2M | -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.