Luc Seraphin is CEO & President at RAMBUS INC (RMBS). They have made 35 open-market trades across 1 company since 2019, most recently 2026-04-02.
CIK 0001341984
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 35 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| RMBS | 345,767 | $30.2M |
Shares reported on the most recent Form 4, priced at the 2026-04-03 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 |
|---|---|---|---|---|---|---|---|---|
| RMBS | SELL · 10b5-1 | 2026-04-02 | 2026-04-03 | $86.65 | $470K | +29.0% | +19.8% | +21.2% |
| RMBS | SELL | 2026-03-02 | 2026-03-03 | $98.63 | $3.9M | +3.5% | +2.4% | +62.5% |
| RMBS | SELL · 10b5-1 | 2025-04-22 | 2025-04-24 | $46.79 | $653K | +3.7% | +13.8% | +36.3% |
| RMBS | SELL · 10b5-1 | 2025-04-15 | 2025-04-16 | $47.79 | $478K | +6.6% | +21.9% | +39.6% |
| RMBS | SELL · 10b5-1 | 2025-04-08 | 2025-04-08 | $46.81 | $468K | +2.7% | +20.3% | +48.7% |
| RMBS | SELL · 10b5-1 | 2025-04-01 | 2025-04-03 | $50.88 | $509K | +9.4% | +16.9% | +49.8% |
| RMBS | SELL · 10b5-1 | 2025-03-25 | 2025-03-26 | $58.64 | $586K | -19.8% | -8.8% | +11.6% |
| RMBS | SELL · 10b5-1 | 2025-03-18 | 2025-03-19 | $53.79 | $538K | -6.7% | -20.6% | +8.0% |
| RMBS | SELL · 10b5-1 | 2024-04-16 | 2024-04-16 | $58.66 | $324K | +0.7% | -1.5% | +10.3% |
| RMBS | SELL · 10b5-1 | 2024-04-09 | 2024-04-10 | $61.35 | $920K | -8.8% | -5.5% | +6.5% |
| RMBS | SELL · 10b5-1 | 2024-04-02 | 2024-04-02 | $59.94 | $899K | +2.8% | -7.3% | -0.9% |
| RMBS | SELL · 10b5-1 | 2024-03-26 | 2024-03-27 | $62.69 | $940K | -2.4% | -6.0% | -13.8% |
| RMBS | SELL · 10b5-1 | 2024-03-19 | 2024-03-20 | $58.36 | $875K | -5.4% | -13.0% | -9.8% |
| RMBS | SELL · 10b5-1 | 2024-03-12 | 2024-03-13 | $62.69 | $940K | +0.6% | -1.9% | -8.5% |
| RMBS | SELL · 10b5-1 | 2024-03-05 | 2024-03-06 | $62.17 | $933K | -6.4% | -7.0% | -16.4% |
| RMBS | SELL | 2023-05-15 | 2023-05-16 | $49.39 | $431K | +26.1% | +14.9% | +3.7% |
| RMBS | SELL | 2023-05-08 | 2023-05-09 | $47.98 | $600K | +23.4% | +33.8% | +11.5% |
| RMBS | SELL | 2023-05-01 | 2023-05-02 | $44.83 | $560K | +3.2% | +37.5% | +30.3% |
| RMBS | SELL | 2023-04-24 | 2023-04-25 | $49.41 | $618K | +7.3% | +40.4% | +32.7% |
| RMBS | SELL | 2023-04-17 | 2023-04-18 | $49.58 | $620K | -9.9% | +19.3% | +29.5% |
| RMBS | SELL | 2023-04-10 | 2023-04-11 | $48.68 | $609K | -1.7% | -1.7% | +22.8% |
| RMBS | SELL | 2023-04-03 | 2023-04-04 | $51.28 | $641K | +1.2% | -4.3% | +30.9% |
| RMBS | SELL | 2023-03-27 | 2023-03-28 | $44.99 | $562K | +13.2% | +1.7% | +30.6% |
| RMBS | SELL | 2023-03-20 | 2023-03-21 | $44.20 | $553K | +12.6% | +8.4% | +31.5% |
| RMBS | SELL | 2023-03-13 | 2023-03-14 | $41.06 | $513K | +4.4% | +19.4% | +49.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.