Updated Jul 16, 2026 · Last SEC filing 2026-06-03
RAMBUS INC (RMBS) has filed 10 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-03. 3 Form 8-K material event filings were reported by RMBS in the last 90 days. 9 Form 144 notices of proposed sale were filed for RMBS stock. InsiderAlpha tracks every RMBS SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Semiconductors & Related Devices (SIC 3674) |
|---|---|
| SEC CIK | 0000917273 |
| Form 4 filings (90d) | 10 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 9 |
| Latest Form 4 filing | 2026-06-03 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sayiner Necip | Insider | S — Open-market sale | 5.0K | $170.15 | $851K | SEC | |
| Higashi Emiko | Insider | S — Open-market sale | 5.0K | $158.00 | $790K | SEC | |
| Higashi Emiko | Insider | S — Open-market sale | 5.0K | $163.00 | $815K | SEC | |
| STANG ERIC B | Insider | S — Open-market sale | 5.0K | $146.00 | $730K | SEC | |
| Higashi Emiko | Insider | S — Open-market sale | 5.0K | $157.57 | $788K | SEC | |
| FAN XIANZHI SEAN | EVP, COO | S — Open-market sale | 37.8K | $151.69 | $5.74M | SEC | |
| FAN XIANZHI SEAN | EVP, COO | S — Open-market sale | 100 | $152.35 | $15K | SEC | |
| Shinn John | SVP, General Counsel | S — Open-market sale | 1.0K | $143.63 | $144K | SEC | |
| Sayiner Necip | Insider | S — Open-market sale | 9.8K | $130.18 | $1.28M | SEC | |
| LAUB STEVEN | Insider | S — Open-market sale | 1.5K | $125.52 | $188K | SEC | |
| Gagneja Sumeet | SVP, CFO | A — Grant or award | 26.8K | $0.00 | — | SEC | |
| Gagneja Sumeet | SVP, CFO | A — Grant or award | 14.5K | $0.00 | — | SEC | |
| Rao Meera | Insider | S — Open-market sale | 3.0K | $150.30 | $447K | SEC | |
| Rao Meera | Insider | S — Open-market sale | 8.5K | $118.08 | $1.01M | SEC | |
| Allen John K | Chief Accounting Officer | F — Tax withholding / forfeiture | 1.1K | $92.22 | $104K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for RAMBUS INC (RMBS). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Higashi Emiko | 3 | $2.39M |
| Gagneja Sumeet | 2 | — |
| Sayiner Necip | 2 | $2.13M |
| FAN XIANZHI SEAN | 2 | $5.75M |
| Rao Meera | 1 | $447K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in RMBS insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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