SEC Form 4 · Updated Daily
RMBS
— RAMBUS INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Seraphin Luc | Director · Officer | 345,767 | 2026-04-02 | S |
| FAN XIANZHI SEAN | Officer | 168,358 | 2026-05-26 | S |
| Lynch Desmond | Officer | 63,618 | 2026-02-23 | S |
| Higashi Emiko | Director | 49,519 | 2026-06-02 | S |
| Gagneja Sumeet | Officer | 41,320 | 2026-05-01 | A |
| Shinn John | Officer | 21,112 | 2026-05-22 | S |
| Rao Meera | Director | 19,974 | 2026-04-24 | S |
| STANG ERIC B | Director | 19,218 | 2026-06-01 | S |
| Sayiner Necip | Director | 18,223 | 2026-06-03 | S |
| Allen John K | Officer | 17,131 | 2026-04-03 | F |
| KISSNER CHARLES | Director | 13,747 | 2026-08-07 | S |
| LAUB STEVEN | Director | 7,519 | 2026-05-07 | S |
| PENG VICTOR | Director | 2,391 | 2026-04-01 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-07 | KISSNER CHARLES | Open-market sale | 5,000 | $100.92 | 13,747 |
| 2026-06-03 | Sayiner Necip | Open-market sale | 5,000 | $170.15 | 18,223 |
| 2026-06-02 | Higashi Emiko | Open-market sale | 5,000 | $158.00 | 49,519 |
| 2026-06-02 | Higashi Emiko | Open-market sale | 5,000 | $163.00 | 54,519 |
| 2026-06-01 | STANG ERIC B | Open-market sale | 5,000 | $146.00 | 19,218 |
| 2026-05-26 | FAN XIANZHI SEAN | Open-market sale | 100 | $152.35 | 168,358 |
| 2026-05-26 | FAN XIANZHI SEAN | Open-market sale | 37,814 | $151.69 | 168,458 |
| 2026-05-26 | Higashi Emiko | Open-market sale | 5,000 | $157.57 | 59,519 |
| 2026-05-22 | Shinn John | Open-market sale | 1,000 | $143.63 | 21,112 |
| 2026-05-08 | Sayiner Necip | Open-market sale | 9,824 | $130.18 | 23,223 |
| 2026-05-07 | LAUB STEVEN | Open-market sale | 1,500 | $125.52 | 7,519 |
| 2026-05-01 | Gagneja Sumeet | Grant / award | 26,802 | $0.00 | 41,320 |
| 2026-05-01 | Gagneja Sumeet | Grant / award | 14,518 | $0.00 | 14,518 |
| 2026-04-24 | Rao Meera | Open-market sale | 2,972 | $150.30 | 19,974 |
| 2026-04-14 | Rao Meera | Open-market sale | 8,538 | $118.08 | 22,946 |
| 2026-04-03 | Allen John K | Tax withholding | 1,131 | $92.22 | 17,131 |
| 2026-04-02 | Seraphin Luc | Open-market sale | 165 | $88.35 | 345,767 |
| 2026-04-02 | Seraphin Luc | Open-market sale | 2,750 | $87.11 | 345,932 |
| 2026-04-02 | Seraphin Luc | Open-market sale | 2,511 | $86.04 | 348,682 |
| 2026-04-01 | Allen John K | Tax withholding | 658 | $89.95 | 18,262 |
| 2026-04-01 | Allen John K | Tax withholding | 495 | $89.95 | 18,920 |
| 2026-04-01 | Allen John K | Grant / award | 2,779 | $0.00 | 19,415 |
| 2026-04-01 | FAN XIANZHI SEAN | Tax withholding | 9,916 | $89.95 | 206,272 |
| 2026-04-01 | FAN XIANZHI SEAN | Grant / award | 22,234 | $0.00 | 216,188 |
| 2026-04-01 | Seraphin Luc | Tax withholding | 12,561 | $89.95 | 351,193 |
| 2026-04-01 | Seraphin Luc | Grant / award | 32,684 | $0.00 | 363,754 |
| 2026-04-01 | Shinn John | Tax withholding | 1,913 | $89.95 | 22,112 |
| 2026-04-01 | Shinn John | Grant / award | 5,558 | $0.00 | 24,025 |
| 2026-04-01 | KISSNER CHARLES | Grant / award | 2,223 | $0.00 | 40,545 |
| 2026-04-01 | PENG VICTOR | Grant / award | 2,223 | $0.00 | 2,391 |
| 2026-04-01 | STANG ERIC B | Grant / award | 2,223 | $0.00 | 2,223 |
| 2026-04-01 | Sayiner Necip | Grant / award | 2,223 | $0.00 | 33,047 |
| 2026-04-01 | Rao Meera | Grant / award | 2,223 | $0.00 | 31,484 |
| 2026-04-01 | LAUB STEVEN | Grant / award | 2,223 | $0.00 | 9,019 |
| 2026-04-01 | Higashi Emiko | Grant / award | 2,223 | $0.00 | 64,519 |
| 2026-03-10 | Shinn John | Open-market sale | 200 | $89.55 | 18,467 |
| 2026-03-10 | Shinn John | Open-market sale | 4,356 | $88.64 | 18,667 |
| 2026-03-03 | Shinn John | Open-market sale | 700 | $94.89 | 23,023 |
| 2026-03-03 | Shinn John | Open-market sale | 1,603 | $94.07 | 23,723 |
| 2026-03-03 | Shinn John | Open-market sale | 2,254 | $92.77 | 25,326 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.