Rambus's three largest insider shareholders as of September 12, 2026 are Luc Seraphin (President And Ceo, 345.77K shares), Luc Seraphin (President And Ceo, 345.77K shares), Xianzhi Sean Fan (Evp, Coo, 206.27K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Luc Seraphin | President And Ceo | 345,767 | 0 | 345,767 | 39.8% | 03 Apr, 2026 |
| 2 | Xianzhi Sean Fan | Evp, Coo | 168,358 | 0 | 168,358 | 19.4% | 26 May, 2026 |
| 3 | Desmond Lynch | Svp, Cfo | 63,618 | 0 | 63,618 | 7.3% | 24 Feb, 2026 |
| 4 | Keith A Jones | Principal Accounting Officer | 54,719 | 0 | 54,719 | 6.3% | 02 Mar, 2022 |
| 5 | Sanjay Saraf | Director | 50,241 | 0 | 50,241 | 5.8% | 04 Apr, 2022 |
| 6 | Emiko Higashi | Director | 49,519 | 0 | 49,519 | 5.7% | 03 Jun, 2026 |
| 7 | Sumeet Gagneja | Svp, Cfo | 41,320 | 0 | 41,320 | 4.8% | 04 May, 2026 |
| 8 | John Shinn | Svp, General Counsel | 21,112 | 0 | 21,112 | 2.4% | 26 May, 2026 |
| 9 | Meera Rao | Director | 19,974 | 0 | 19,974 | 2.3% | 27 Apr, 2026 |
| 10 | John K Allen | Chief Accounting Officer | 17,131 | 0 | 17,131 | 2.0% | 07 Apr, 2026 |
| 11 | James A Mitarotonda | Director | 13,946 | 0 | 13,946 | 1.6% | 04 Apr, 2022 |
| 12 | Charles Kissner | Director | 0 | 13,747 | 13,747 | 1.6% | 10 Aug, 2026 |
| 13 | Steven Laub | Director | 7,519 | 0 | 7,519 | 0.9% | 11 May, 2026 |
| 14 | Victor Peng | Director | 2,391 | 0 | 2,391 | 0.3% | 03 Apr, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 07 Aug, 2026 | Charles Kissner | Director | Disposed S | 5,000 | $100.92 | $504.60K | 13,747 | Indirect |
| 02 Jun, 2026 | Emiko Higashi | Director | Disposed S | 5,000 | $163.00 | $815.00K | 54,519 | Direct |
| 03 Jun, 2026 | Necip Sayiner | Director | Disposed S | 5,000 | $170.15 | $850.75K | 18,223 | Direct |
| 02 Jun, 2026 | Emiko Higashi | Director | Disposed S | 5,000 | $158.00 | $790.00K | 49,519 | Direct |
| 26 May, 2026 | Emiko Higashi | Director | Disposed S | 5,000 | $157.57 | $787.85K | 59,519 | Direct |
| 22 May, 2026 | John Shinn | Svp, General Counsel | Disposed S | 1,000 | $143.63 | $143.63K | 21,112 | Direct |
| 26 May, 2026 | Xianzhi Sean Fan | Evp, Coo | Disposed S | 37,814 | $151.69 | $5.74Mn | 168,458 | Direct |
| 26 May, 2026 | Xianzhi Sean Fan | Evp, Coo | Disposed S | 100 | $152.35 | $15.24K | 168,358 | Direct |
| 08 May, 2026 | Necip Sayiner | Director | Disposed S | 9,824 | $130.18 | $1.28Mn | 23,223 | Direct |
| 07 May, 2026 | Steven Laub | Director | Disposed S | 1,500 | $125.52 | $188.28K | 7,519 | Direct |
| 01 May, 2026 | Sumeet Gagneja | Svp, Cfo | Acquired A | 14,518 | $0.00 | $0 | 14,518 | Direct |
| 01 May, 2026 | Sumeet Gagneja | Svp, Cfo | Acquired A | 26,802 | $0.00 | $0 | 41,320 | Direct |
| 24 Apr, 2026 | Meera Rao | Director | Disposed S | 2,972 | $150.30 | $446.69K | 19,974 | Direct |
| 14 Apr, 2026 | Meera Rao | Director | Disposed S | 8,538 | $118.08 | $1.01Mn | 22,946 | Direct |
| 03 Apr, 2026 | John K Allen | Chief Accounting Officer | Disposed F | 1,131 | $92.22 | $104.30K | 17,131 | Direct |
| 01 Apr, 2026 | Luc Seraphin | President And Ceo | Acquired A | 32,684 | $0.00 | $0 | 363,754 | Direct |
| 01 Apr, 2026 | Steven Laub | Director | Acquired A | 2,223 | $0.00 | $0 | 9,019 | Direct |
| 01 Apr, 2026 | Emiko Higashi | Director | Acquired A | 2,223 | $0.00 | $0 | 64,519 | Direct |
| 01 Apr, 2026 | Luc Seraphin | President And Ceo | Acquired A | 32,684 | $0.00 | $0 | 363,754 | Direct |
| 01 Apr, 2026 | Luc Seraphin | President And Ceo | Acquired A | 32,684 | $0.00 | $0 | 363,754 | Direct |