Beta41% was sold under disclosed trading plans, 59% with no plan disclosed. The largest seller, Xianzhi Fan (EVP, COO), sold $5.8M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why
A share of stake is shown for 0 of the 10 officers and directors who sold. 14 are left out Disclosed company stock is not an insider's whole wealth.i
Left out: Luc Seraphin, Xianzhi Fan, Emiko Higashi, Desmond Lynch, Charles Kissner, Necip Sayiner, Meera Rao, Eric Stang, John Shinn, John Allen, William Taulbee II, Steven Laub, Victor Peng and Sumeet Gagneja (share of stake is being verified).
Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.
Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Charles Kissner Director | 5,000 | $111.00 | n/a | n/a | Oct 2, 2026 | Oct 5, 2026 |
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Charles Kissner Director | 5,000 | $105.00 | n/a | n/a | Sep 22, 2026 | Sep 24, 2026 |
"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.
Yes. Luc Seraphin sold 45K shares ($4.4M) in the past 12 months, all of it under a trading plan disclosed in the filings.
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 41% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 59% had no disclosed plan. A trading plan schedules sales in advance.
No. Officers and directors reported no purchases in the past 12 months.
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| Xianzhi Fan EVP, COO | $5.8M 38K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Luc Seraphin President and CEO, Director | $4.4M 45K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Emiko Higashi Director | $2.4M 15K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Necip Sayiner Director | $2.1M 15K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Eric Stang Director | $1.7M 14K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Charles Kissner Director | $1.6M 15K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Meera Rao Director | $1.5M 12K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| John Shinn SVP, General Counsel | $974K 10K shares | Not confirmedshare of stake is being verified. Why | 85% under a disclosed plan 15% no plan disclosed |
| Desmond Lynch SVP, CFO | $434K 4.3K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Steven Laub Director | $188K 1.5K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.
| Insider | Held Oct 16, 2025 | Sold | Held Oct 16, 2026 | Still held |
|---|---|---|---|---|
Luc Seraphin!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Luc Seraphin are complete. President and CEO, Director | n/a | −45K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Luc SeraphinHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Luc Seraphin are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −105Kwithheld by the company for taxes | ||||
Xianzhi Fan!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Xianzhi Fan are complete. EVP, COO | n/a | −38K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Xianzhi FanHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Xianzhi Fan are complete; balances and unit counts will be added when the check is finished. −600gifted (net of own trusts) −102Kwithheld by the company for taxes | ||||
Emiko Higashi!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Emiko Higashi are complete. Director | n/a | −15K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Emiko HigashiHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Emiko Higashi are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Desmond Lynch!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Desmond Lynch are complete. SVP, CFO | n/a | −4.3K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Desmond LynchHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Desmond Lynch are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −22Kwithheld by the company for taxes | ||||
Charles Kissner!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Charles Kissner are complete. Director | n/a | −15K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Charles KissnerHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Charles Kissner are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Necip Sayiner!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Necip Sayiner are complete. Director | n/a | −15K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Necip SayinerHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Necip Sayiner are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Meera Rao!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Meera Rao are complete. Director | n/a | −12K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Meera RaoHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Meera Rao are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Eric Stang!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Eric Stang are complete. Director | n/a | −14K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Eric StangHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Eric Stang are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
John Shinn!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for John Shinn are complete. SVP, General Counsel | n/a | −10K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for John ShinnHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for John Shinn are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −12Kwithheld by the company for taxes | ||||
John Allen!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for John Allen are complete. Chief Accounting Officer | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for John AllenHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for John Allen are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −2.3Kwithheld by the company for taxes | ||||
William Taulbee II!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for William Taulbee II are complete. Chief Accounting Officer | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for William Taulbee IIHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for William Taulbee II are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Steven Laub!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Steven Laub are complete. Director | n/a | −1.5K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Steven LaubHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Steven Laub are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Victor Peng!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Victor Peng are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Victor PengHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Victor Peng are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Sumeet Gagneja!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Sumeet Gagneja are complete. SVP, CFO | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Sumeet GagnejaHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Sumeet Gagneja are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Holdings and share of stake for Rambus Inc are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.
Officer and director open-market sales: $21.0M across 169,474 shares. Plan status and stated purpose are separate questions, and a sale can have both.
The lighter segment is sales with no plan disclosed in the filing ($12.3M), including tax-related sales outside a plan.
Sales with no 10b5-1 plan and no tax reference in the filing. $5.8M of it is Xianzhi Fan. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Xianzhi Fan, May 26, 2026
243,589 shares ($27.1M) were withheld by the company for taxes, which isn't a market sale.
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| Xianzhi Fan EVP, COO | 38K | $5.8M | 0% | 27% | May 26, 2026 to May 26, 2026 |
| Luc Seraphin President and CEO, Director | 45K | $4.4M | 100% | 21% | Mar 2, 2026 to Apr 2, 2026 |
| Emiko Higashi Director | 15K | $2.4M | 0% | 11% | May 26, 2026 to Jun 2, 2026 |
| Necip Sayiner Director | 15K | $2.1M | 0% | 10% | May 8, 2026 to Jun 3, 2026 |
| Eric Stang Director | 14K | $1.7M | 0% | 8% | Nov 7, 2025 to Jun 1, 2026 |
| Charles Kissner Director | 15K | $1.6M | 100% | 8% | Aug 7, 2026 to Oct 2, 2026 |
| Meera Rao Director | 12K | $1.5M | 100% | 7% | Apr 14, 2026 to Apr 24, 2026 |
| John Shinn SVP, General Counsel | 10K | $974K | 85% | 5% | Mar 3, 2026 to May 22, 2026 |
| Desmond Lynch SVP, CFO | 4.3K | $434K | 100% | 2% | Feb 23, 2026 to Feb 23, 2026 |
| Steven Laub Director | 1.5K | $188K | 0% | 0.9% | May 7, 2026 to May 7, 2026 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $0 | $0 | $0 | $0 |
| Nov 2025 | $959K | $0 | $0 | $959K |
| Dec 2025 | $0 | $0 | $0 | $0 |
| Jan 2026 | $0 | $0 | $0 | $0 |
| Feb 2026 | $434K | $434K | $0 | $0 |
| Mar 2026 | $4.8M | $4.8M | $0 | $0 |
| Apr 2026 | $1.9M | $1.9M | $0 | $0 |
| May 2026 | $8.1M | $0 | $0 | $8.1M |
| Jun 2026 | $3.2M | $0 | $0 | $3.2M |
| Jul 2026 | $0 | $0 | $0 | $0 |
| Aug 2026 | $505K | $505K | $0 | $0 |
| Sep 2026 | $525K | $525K | $0 | $0 |
| Oct 2026 | $555K | $555K | $0 | $0 |
In line with the past 5 years. 10 insiders sold; the average is 6 a year.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 16, 2026 Latest 12 months | 169K | 10 | $21.0M |
| Oct 16, 2025 1 year earlier | 196K | 9 | $12.6M |
| Oct 16, 2024 2 years earlier | 262K | 8 | $16.3M |
| Oct 17, 2023 3 years earlier | 310K | 5 | $13.5M |
| Oct 17, 2022 4 years earlier | 198K | 3 | $5.4M |
| Oct 17, 2021 5 years earlier | 100K | 4 | $1.8M |
Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.
Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Rambus Inc are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.
External context: we only cite outside events when a documented connection exists. None is shown for this period.
All 993 Forms 3, 4 and 5 on record for Rambus Inc (SEC CIK 917273), filed from Apr 23, 2003 to Oct 5, 2026; 41 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages. 1 older filing exists only on paper and could not be read.
Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.
Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".
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