Nasdaq · CIK 0000917273
RMBS RAMBUS INC
Insider trading from SEC Form 4. Last filing 8 d ago. Close $107.47 on Oct 9, 2026, +35% from the 52-week low and -37% from the high.
RAMBUS INC (RMBS) has 70 SEC Form 4 filings on file from 13 insiders, the latest filed on Oct 5, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 2 open-market sells worth $1.1M, net -$1.1M.
39 open-market trades have been scored at RMBS. The newest: Charles Kissner (director) sold $555k of stock on Oct 2, 2026, filed Oct 5, 2026, scored 34 (weak), under a 10b5-1 plan. The largest of the 39 shown: Xianzhi Sean Fan (EVP, COO) sold $5.8M on May 26, 2026, scored 65 (notable). 5 insiders sold within 14 days of each other around Jun 2, 2026.
RMBS closed at $107.47 on Oct 9, 2026, 35% above its 52-week low and 37% below its 52-week high.
25 Form 144 notices of planned sales are on file, the latest filed Sep 22, 2026.
Last 90 days
Net insider value
-$1.1M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
2
$1.1M by 1 insider
Insiders on file
13
with a Form 4 at this company
Price and insider trades, last year
RMBSOct 9, 2026 · close 107.47
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at RAMBUS INC, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 34Weak | Charles Kissner director sell | $555k 5,000 shares | -57% | +40% from low-34% from high | |
| 23Weak | Charles Kissner director sell | $525k 5,000 shares | -36% | +32% from low-38% from high | |
| 60Notable | Emiko Higashi director sell | $1.6M 10,000 shares | -17% | +205% from low0% from high | |
| 58Moderate | Necip Sayiner director sell | $851k 5,000 shares | -22% | +203% from low0% from high | |
| 56Moderate | Eric B Stang director sell | $730k 5,000 shares | -21% | +169% from low-7% from high | |
| 52Moderate | Emiko Higashi director sell | $788k 5,000 shares | -8% | +194% from low-1% from high | |
| 65Notable | Xianzhi Sean Fan EVP, COO sell | $5.8M 37,914 shares | -18% | +194% from low-1% from high | |
| 41Moderate | John Shinn SVP, General Counsel sell | $144k 1,000 shares | -5% | +167% from low-10% from high | |
| 47Moderate | Steven Laub director sell | $188k 1,500 shares | -17% | +149% from low-20% from high | |
| 65Notable | Necip Sayiner director sell | $1.3M 9,824 shares | -30% | +153% from low-18% from high | |
| 32Weak | Meera Rao director sell | $447k 2,972 shares | -13% | +225% from low0% from high | |
| 38Weak | Meera Rao director sell | $1.0M 8,538 shares | -27% | +176% from low-3% from high | |
| 30Weak | Luc Seraphin President and CEO sell | $470k 5,426 shares | -2% | +117% from low-26% from high | |
| 24Weak | John Shinn SVP, General Counsel sell | $404k 4,556 shares | -20% | +109% from low-29% from high | |
| 32Weak | John Shinn SVP, General Counsel sell | $426k 4,557 shares | -17% | +104% from low-30% from high | |
| 50Moderate | Luc Seraphin President and CEO sell | $3.9M 39,914 shares | -11% | +130% from low-21% from high | |
| 34Weak | Desmond Lynch SVP, CFO sell | $434k 4,273 shares | -6% | +122% from low-24% from high | |
| 49Moderate | Eric B Stang director sell | $959k 9,000 shares | -31% | +151% from low-5% from high | |
| 39Weak | Desmond Lynch SVP, CFO sell | $921k 9,074 shares | -14% | +146% from low-6% from high | |
| 11Weak | Meera Rao director sell | $67k 653 shares | -2% | +157% from low-4% from high | |
| 45Moderate | Desmond Lynch SVP, CFO sell | $832k 9,074 shares | -12% | +148% from low0% from high | |
| 55Moderate | Necip Sayiner director sell | $642k 7,500 shares | -20% | +131% from low0% from high | |
| 22Weak | Meera Rao director sell | $215k 3,000 shares | -9% | +92% from low-9% from high | |
| 47Moderate | Steven Laub director sell | $178k 2,261 shares | -25% | +93% from low-9% from high | |
| 39Weak | Emiko Higashi director sell | $84k 1,075 shares | -2% | +101% from low0% from high | |
| 54Moderate | Necip Sayiner director sell | $551k 7,500 shares | -16% | +90% from low-4% from high | |
| 39Weak | Emiko Higashi director sell | $83k 1,111 shares | -2% | +98% from low0% from high | |
| 37Weak | John Shinn SVP, General Counsel sell | $59k 790 shares | -4% | +98% from low0% from high | |
| 30Weak | Steven Laub director sell | $102k 1,847 shares | -17% | +44% from low-20% from high | |
| 52Moderate | Steven Laub director sell | $203k 3,653 shares | -25% | +46% from low-19% from high | |
| 47Moderate | Eric B Stang director sell | $187k 3,653 shares | -11% | +33% from low-26% from high | |
| 28Weak | Desmond Lynch SVP, CFO sell | $157k 3,118 shares | -4% | +32% from low-26% from high | |
| 28Weak | Luc Seraphin President and CEO sell | $355k 7,603 shares | -2% | +16% from low-35% from high | |
| 23Weak | Luc Seraphin President and CEO sell | $478k 10,000 shares | -3% | +24% from low-31% from high | |
| 22Weak | Luc Seraphin President and CEO sell | $468k 10,000 shares | -3% | +12% from low-37% from high | |
| 23Weak | Luc Seraphin President and CEO sell | $509k 10,000 shares | -3% | +37% from low-24% from high | |
| 55Moderate | Xianzhi Sean Fan EVP, COO sell | $3.6M 52,327 shares | -36% | - | |
| 42Moderate | Meera Rao director sell | $315k 5,408 shares | -16% | - | |
| 39Weak | John Shinn SVP, General Counsel sell | $143k 2,462 shares | -11% | - |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 22, 2026 | KISSNER CHARLES Director | 5,000 0.00% of outstanding | $525k | Sep 22, 2026 | $505k |
| Aug 7, 2026 | KISSNER CHARLES Director | 5,000 0.00% of outstanding | $505k | Aug 7, 2026 | none |
| Jun 3, 2026 | NECIP SAYINER Officer | 5,000 0.00% of outstanding | $851k | Jun 3, 2026 | $1.3M |
| Jun 2, 2026 | EMIKO HIGASHI Director | 10,000 0.01% of outstanding | $1.6M | Jun 2, 2026 | $788k |
| Jun 1, 2026 | STANG FAMILY TRUST Affiliate | 5,000 0.00% of outstanding | $730k | Jun 1, 2026 | none |
| May 26, 2026 | XIANZHI S FAN Officer | 37,914 0.04% of outstanding | $5.8M | May 26, 2026 | none |
| May 26, 2026 | EMIKO HIGASHI Director | 5,000 0.00% of outstanding | $788k | May 26, 2026 | none |
| May 22, 2026 | JOHN SHINN Officer | 1,000 0.00% of outstanding | $144k | May 22, 2026 | $830k |
| May 8, 2026 | NECIP SAYINER Director | 9,824 0.01% of outstanding | $1.3M | May 8, 2026 | none |
| May 7, 2026 | STEVEN LAUB Director | 1,500 0.00% of outstanding | $188k | May 7, 2026 | none |
| Apr 24, 2026 | MEERA RAO Director | 2,972 0.00% of outstanding | $447k | Apr 24, 2026 | $1.0M |
| Apr 14, 2026 | MEERA RAO Director | 8,538 0.01% of outstanding | $1.0M | Apr 14, 2026 | none |
| Apr 2, 2026 | DESMOND M LYNCH Officer | 1,586 0.00% of outstanding | $136k | Apr 2, 2026 | $434k |
| Apr 2, 2026 | LUC SERAPHIN Officer, Director | 5,426 0.01% of outstanding | $470k | Apr 2, 2026 | $3.9M |
| Mar 10, 2026 | JOHN SHINN Officer | 4,556 0.00% of outstanding | $404k | Mar 10, 2026 | $426k |
| Mar 3, 2026 | JOHN SHINN Officer | 4,557 0.00% of outstanding | $426k | Mar 3, 2026 | none |
| Mar 2, 2026 | LUC SERAPHIN Officer, Director | 39,914 0.04% of outstanding | $3.9M | Mar 2, 2026 | none |
| Feb 23, 2026 | DESMOND M LYNCH Officer | 4,273 0.00% of outstanding | $434k | Feb 23, 2026 | none |
| Nov 10, 2025 | STANG FAMILY TRUST Officer | 4,000 0.00% of outstanding | $447k | Nov 10, 2025 | $512k |
| Nov 7, 2025 | STANG FAMILY TRUST Officer | 5,000 0.00% of outstanding | $512k | Nov 7, 2025 | none |
| Oct 6, 2025 | DESMOND M LYNCH Officer | 9,074 0.01% of outstanding | $921k | Oct 6, 2025 | $832k |
| Oct 1, 2025 | MEERA RAO Director | 653 0.00% of outstanding | $67k | Oct 1, 2025 | $215k |
| Sep 15, 2025 | DESMOND M LYNCH Officer | 9,074 0.01% of outstanding | $832k | Sep 15, 2025 | none |
| Sep 11, 2025 | NECIP SAYINER Director | 7,500 0.01% of outstanding | $642k | Sep 11, 2025 | $551k |
| Sep 2, 2025 | MEERA RAO Director | 3,000 0.00% of outstanding | $215k | Sep 2, 2025 | none |
Transactions
The newest 50 of 104 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Charles Kissner director | SOpen-market sale Common Stockindirect: See Footnote10b5-1 | -5,000 | $111.00 | $555k | 3,747 | 8 d ago |
| Sep 22, 2026 | Charles Kissner director | SOpen-market sale Common Stockindirect: See Footnote10b5-1 | -5,000 | $105.00 | $525k | 8,747 | 19 d ago |
| Jun 2, 2026 | Emiko Higashi director | SOpen-market sale Common Stock | -5,000 | $163.00 | $815k | 54,519 | Jun 3, 2026 |
| Jun 3, 2026 | Necip Sayiner director | SOpen-market sale Common Stock | -5,000 | $170.15 | $851k | 18,223 | Jun 3, 2026 |
| Jun 2, 2026 | Emiko Higashi director | SOpen-market sale Common Stock | -5,000 | $158.00 | $790k | 49,519 | Jun 3, 2026 |
| Jun 1, 2026 | Eric B Stang director | SOpen-market sale Common Stockindirect: See Footnote | -5,000 | $146.00 | $730k | 19,218 | Jun 2, 2026 |
| May 26, 2026 | Emiko Higashi director | SOpen-market sale Common Stock | -5,000 | $157.57 | $788k | 59,519 | May 27, 2026 |
| May 26, 2026 | Xianzhi Sean Fan EVP, COO | SOpen-market sale Common Stock | -37,814 | $151.69 | $5.7M | 168,458 | May 26, 2026 |
| May 22, 2026 | John Shinn SVP, General Counsel | SOpen-market sale Common Stock | -1,000 | $143.63 | $144k | 21,112 | May 26, 2026 |
| May 26, 2026 | Xianzhi Sean Fan EVP, COO | SOpen-market sale Common Stock | -100 | $152.35 | $15k | 168,358 | May 26, 2026 |
| May 8, 2026 | Necip Sayiner director | SOpen-market sale Common Stock | -9,824 | $130.18 | $1.3M | 23,223 | May 11, 2026 |
| May 7, 2026 | Steven Laub director | SOpen-market sale Common Stock | -1,500 | $125.52 | $188k | 7,519 | May 11, 2026 |
| May 1, 2026 | Sumeet Gagneja SVP, CFO | AGrant or award Common Stock | +14,518 | $0.00 | $0 | 14,518 | May 4, 2026 |
| May 1, 2026 | Sumeet Gagneja SVP, CFO | AGrant or award Common Stock | +26,802 | $0.00 | $0 | 41,320 | May 4, 2026 |
| Apr 24, 2026 | Meera Rao director | SOpen-market sale Common Stock10b5-1 | -2,972 | $150.30 | $447k | 19,974 | Apr 27, 2026 |
| Apr 14, 2026 | Meera Rao director | SOpen-market sale Common Stock10b5-1 | -8,538 | $118.08 | $1.0M | 22,946 | Apr 15, 2026 |
| Apr 3, 2026 | John K Allen Chief Accounting Officer | FTax withholding Common Stock | -1,131 | $92.22 | $104k | 17,131 | Apr 7, 2026 |
| Apr 1, 2026 | John Shinn SVP, General Counsel | AGrant or award Common Stock | +5,558 | $0.00 | $0 | 24,025 | Apr 3, 2026 |
| Apr 1, 2026 | Eric B Stang director | AGrant or award Common Stock | +2,223 | $0.00 | $0 | 2,223 | Apr 3, 2026 |
| Apr 1, 2026 | Necip Sayiner director | AGrant or award Common Stock | +2,223 | $0.00 | $0 | 33,047 | Apr 3, 2026 |
| Apr 1, 2026 | Meera Rao director | AGrant or award Common Stock | +2,223 | $0.00 | $0 | 31,484 | Apr 3, 2026 |
| Apr 1, 2026 | John K Allen Chief Accounting Officer | AGrant or award Common Stock | +2,779 | $0.00 | $0 | 19,415 | Apr 3, 2026 |
| Apr 1, 2026 | Xianzhi Sean Fan EVP, COO | AGrant or award Common Stock | +22,234 | $0.00 | $0 | 216,188 | Apr 3, 2026 |
| Apr 1, 2026 | Emiko Higashi director | AGrant or award Common Stock | +2,223 | $0.00 | $0 | 64,519 | Apr 3, 2026 |
| Apr 1, 2026 | Charles Kissner director | AGrant or award Common Stock | +2,223 | $0.00 | $0 | 40,545 | Apr 3, 2026 |
| Apr 1, 2026 | Steven Laub director | AGrant or award Common Stock | +2,223 | $0.00 | $0 | 9,019 | Apr 3, 2026 |
| Apr 1, 2026 | Victor Peng director | AGrant or award Common Stock | +2,223 | $0.00 | $0 | 2,391 | Apr 3, 2026 |
| Apr 1, 2026 | Luc Seraphin President and CEO | AGrant or award Common Stock10b5-1 | +32,684 | $0.00 | $0 | 363,754 | Apr 3, 2026 |
| Apr 1, 2026 | John Shinn SVP, General Counsel | FTax withholding Common Stock | -1,913 | $89.95 | $172k | 22,112 | Apr 3, 2026 |
| Apr 1, 2026 | John K Allen Chief Accounting Officer | FTax withholding Common Stock | -495 | $89.95 | $45k | 18,920 | Apr 3, 2026 |
| Apr 1, 2026 | Xianzhi Sean Fan EVP, COO | FTax withholding Common Stock | -9,916 | $89.95 | $892k | 206,272 | Apr 3, 2026 |
| Apr 1, 2026 | Luc Seraphin President and CEO | FTax withholding Common Stock10b5-1 | -12,561 | $89.95 | $1.1M | 351,193 | Apr 3, 2026 |
| Apr 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -2,511 | $86.04 | $216k | 348,682 | Apr 3, 2026 |
| Apr 1, 2026 | John K Allen Chief Accounting Officer | FTax withholding Common Stock | -658 | $89.95 | $59k | 18,262 | Apr 3, 2026 |
| Apr 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -2,750 | $87.11 | $240k | 345,932 | Apr 3, 2026 |
| Apr 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -165 | $88.35 | $15k | 345,767 | Apr 3, 2026 |
| Mar 10, 2026 | John Shinn SVP, General Counsel | SOpen-market sale Common Stock10b5-1 | -4,356 | $88.64 | $386k | 18,667 | Mar 11, 2026 |
| Mar 10, 2026 | John Shinn SVP, General Counsel | SOpen-market sale Common Stock10b5-1 | -200 | $89.55 | $18k | 18,467 | Mar 11, 2026 |
| Mar 3, 2026 | John Shinn SVP, General Counsel | SOpen-market sale Common Stock10b5-1 | -2,254 | $92.77 | $209k | 25,326 | Mar 4, 2026 |
| Mar 3, 2026 | John Shinn SVP, General Counsel | SOpen-market sale Common Stock10b5-1 | -1,603 | $94.07 | $151k | 23,723 | Mar 4, 2026 |
| Mar 3, 2026 | John Shinn SVP, General Counsel | SOpen-market sale Common Stock10b5-1 | -700 | $94.89 | $66k | 23,023 | Mar 4, 2026 |
| Mar 2, 2026 | Victor Peng director | AGrant or award Common Stock | +168 | $0.00 | $0 | 168 | Mar 3, 2026 |
| Mar 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -1,679 | $95.83 | $161k | 369,305 | Mar 3, 2026 |
| Mar 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -7,225 | $97.38 | $704k | 362,080 | Mar 3, 2026 |
| Mar 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -13,654 | $98.22 | $1.3M | 348,426 | Mar 3, 2026 |
| Mar 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -9,469 | $99.17 | $939k | 338,957 | Mar 3, 2026 |
| Mar 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -6,587 | $100.20 | $660k | 332,370 | Mar 3, 2026 |
| Mar 2, 2026 | Luc Seraphin President and CEO | SOpen-market sale Common Stock10b5-1 | -1,300 | $101.65 | $132k | 331,070 | Mar 3, 2026 |
| Feb 23, 2026 | Desmond Lynch SVP, CFO | SOpen-market sale Common Stock10b5-1 | -4,273 | $101.53 | $434k | 63,618 | Feb 24, 2026 |
| Feb 1, 2026 | Xianzhi Sean Fan EVP, COO | AGrant or award Common Stock | +148,802 | $0.00 | $0 | 286,357 | Feb 3, 2026 |
50 of 104 rows shown.
Insiders
Everyone who has filed a Form 4 here.
- John K AllenChief Accounting Officer
- Xianzhi Sean FanEVP, COO
- Sumeet GagnejaSVP, CFO
- Emiko Higashidirector
- Charles Kissnerdirector
- Steven Laubdirector
- Desmond LynchSVP, CFO
- Victor Pengdirector
- Meera Raodirector
- Eric B Stangceo, officer, director, president
- Necip Sayinerdirector
- Luc SeraphinPresident and CEO
- John ShinnSVP, General Counsel
Questions about RMBS
Answered from the filings on this page, as of the latest one.
Are insiders buying RMBS?
As of Oct 5, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 2 open-market sells worth $1.1M by 1 insider at RAMBUS INC in the last 90 days, net -$1.1M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade RMBS on the open market?
Charles Kissner (director) sold $555k of RMBS on Oct 2, 2026 and filed the Form 4 on Oct 5, 2026. InsiderTell scored 34 (weak), under a 10b5-1 plan.
How many insiders file Form 4 at RAMBUS INC?
13 people have filed a Form 4 at RAMBUS INC, among them John K Allen (Chief Accounting Officer), Xianzhi Sean Fan (EVP, COO), Sumeet Gagneja (SVP, CFO). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.