Xianzhi Sean Fan
Xianzhi Sean Fan: EVP, COO at Rambus. What Xianzhi Sean Fan holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Rambus (RMBS)
Xianzhi Sean Fan holds 168,358 Rambus shares (0.16% of the company), worth about $17.2M at the last price, according to the Form 4 of May 26, 2026.
- Shares held: 168,358 (0.16%), $17.2M — Held in their own name.
Declarations
- Rambus (RMBS) — Form 4 of May 26, 2026 (EVP, COO): open-market sale of 37,814 at $151.69; open-market sale of 100 at $152.35; 168,358 shares after 0001193125-26-239759
- Rambus (RMBS) — Form 4 of Apr 1, 2026 (EVP, COO): grant or award of 22,234; shares withheld for tax of 9,916 at $89.95; 206,272 shares after 0001193125-26-142581
- Rambus (RMBS) — Form 4 of Feb 1, 2026 (EVP, COO): grant or award of 148,802; shares withheld for tax of 92,403 at $113.71; 193,954 shares after 0001193125-26-036320
- Rambus (RMBS) — Form 4 of Nov 21, 2025 (EVP, COO): gift of 300; 137,555 shares after 0001193125-25-291401
- Rambus (RMBS) — Form 4 of Nov 19, 2025 (EVP, COO): gift of 300; 137,855 shares after 0001193125-25-290303
- Rambus (RMBS) — Form 4 of Apr 1, 2025 (EVP, COO): grant or award of 47,810; shares withheld for tax of 3,496 at $52.29; 138,155 shares after 0000917273-25-000045
- Rambus (RMBS) — Form 4 of Feb 19, 2025 (EVP, COO): open-market sale of 52,327 at $68.02; 93,841 shares after 0000917273-25-000016
- Rambus (RMBS) — Form 4 of Feb 1, 2025 (EVP, COO): grant or award of 112,675; shares withheld for tax of 78,078 at $60.35; 146,168 shares after 0000917273-25-000010
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.
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