Ralf Kuriyel is VP at REPLIGEN CORP (RGEN). They have made 18 open-market trades across 1 company since 2018, most recently 2026-03-05.
CIK 0001733143
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 18 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| RGEN | 20,062 | $3.5M |
Shares reported on the most recent Form 4, priced at the 2026-03-23 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| RGEN | SELL | 2024-08-02 | 2024-08-05 | $159.35 | $2.3M | +0.1% | -11.1% | -14.1% |
| RGEN | SELL | 2024-08-01 | 2024-08-01 | $165.67 | $1.5M | +2.1% | -12.0% | -15.4% |
| RGEN | SELL | 2024-03-11 | 2024-03-12 | $193.73 | $1.4M | +3.4% | -8.1% | -26.3% |
| RGEN | SELL | 2022-08-11 | 2022-08-12 | $254.24 | $2.3M | -8.4% | -7.4% | -24.6% |
| RGEN | SELL | 2021-08-30 | 2021-09-02 | $282.13 | $2.3M | +3.0% | -5.1% | -3.8% |
| RGEN | SELL | 2021-06-10 | 2021-06-14 | $189.19 | $2.6M | -0.5% | +0.4% | +49.3% |
| RGEN | SELL | 2021-05-14 | 2021-05-18 | $172.29 | $245K | +8.4% | +18.5% | +52.0% |
| RGEN | SELL | 2021-03-10 | 2021-03-12 | $190.44 | $3.0M | -3.4% | +5.7% | -3.0% |
| RGEN | SELL | 2021-03-04 | 2021-03-08 | $192.00 | $398K | +7.6% | +8.3% | -1.1% |
| RGEN | SELL | 2020-12-16 | 2020-12-18 | $186.18 | $162K | -0.2% | +15.8% | +4.2% |
| RGEN | SELL | 2020-08-06 | 2020-08-10 | $153.79 | $769K | +2.2% | -0.4% | +29.9% |
| RGEN | SELL | 2020-05-15 | 2020-05-19 | $140.69 | $122K | -5.6% | -17.2% | +7.7% |
| RGEN | SELL | 2020-05-13 | 2020-05-15 | $127.79 | $2.0M | -8.9% | -19.7% | +3.1% |
| RGEN | SELL | 2020-03-03 | 2020-03-05 | $90.63 | $445K | +7.7% | +11.2% | +40.4% |
| RGEN | SELL | 2020-02-26 | 2020-02-27 | $86.60 | $17K | +15.8% | +15.8% | +54.7% |
| RGEN | SELL | 2019-03-05 | 2019-03-05 | $58.53 | $262K | +3.4% | -2.0% | +19.5% |
| RGEN | SELL | 2019-02-28 | 2019-03-04 | $59.16 | $11K | -0.2% | +0.2% | +17.2% |
| RGEN | SELL | 2018-12-18 | 2018-12-20 | $54.44 | $17K | -2.6% | +8.6% | +17.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.