RAMBUS INC (RMBS)
$86.08-$5.03 (-5.52%) Today
Emiko HigashiEmiko Higashi
Eric B. StangEmiko HigashiRambus Inc is a semiconductor company providing chips and silicon IP for data-intensive computing systems, focusing on data center and artificial intelligence (AI) infrastructure. The company is at the forefront of enabling the next era of AI-driven computing, addressing challenges of signal and power integrity at increasingly extreme data rates across the data center, edge, and client markets. It offers high-performance memory subsystems, with a balanced and diverse portfolio of products, IP, and patents that maximize performance and security in computationally intensive systems. The company operates in South Korea, Singapore, the United States, and other countries, with the majority of its revenue coming from South Korea.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 5 | 25,000 | $3.69M |
56 Form 4 filings on record, the earliest from Dec 12, 2024, newest first. Filing history page 1 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Charles Kissner - Director | Open-market sale | Common Stock | 5,000 | $100.92 | $505K | |
| Necip Sayiner | Open-market sale | Common Stock | 5,000 | $170.15 | $851K | |
| Emiko Higashi | Open-market sale | Common Stock | 5,000 | $163.00 | $815K | |
| Emiko Higashi | Open-market sale | Common Stock | 5,000 | $158.00 | $790K | |
| Eric B. Stang | Open-market sale | Common Stock | 5,000 | $146.00 | $730K | |
| Emiko Higashi | Open-market sale | Common Stock | 5,000 | $157.57 | $788K | |
| Xianzhi Sean Fan - Officer | Open-market sale | Common Stock | 37,814 | $151.69 | $5.74M | |
| Xianzhi Sean Fan - Officer | Open-market sale | Common Stock | 100 | $152.35 | $15K | |
 John Shinn - Officer | Open-market sale | Common Stock | 1,000 | $143.63 | $144K | |
| Necip Sayiner | Open-market sale | Common Stock | 9,824 | $130.18 | $1.28M | |
| Steven Laub | Open-market sale | Common Stock | 1,500 | $125.52 | $188K | |
| Sumeet Gagneja - Officer | Grant or award | Common Stock | 14,518 | $0.00 | - | |
| Sumeet Gagneja - Officer | Grant or award | Common Stock | 26,802 | $0.00 | - | |
| Meera Rao | Open-market sale | Common Stock | 2,972 | $150.30 | $447K | |
| Meera Rao | Open-market sale | Common Stock | 8,538 | $118.08 | $1.01M | |
 John K. Allen - Officer | Tax withholding / forfeiture | Common Stock | 1,131 | $92.22 | $104K | |
| Emiko Higashi | Grant or award | Common Stock | 2,223 | $0.00 | - | |
| Steven Laub | Grant or award | Common Stock | 2,223 | $0.00 | - | |
| Meera Rao | Grant or award | Common Stock | 2,223 | $0.00 | - | |
| Necip Sayiner | Grant or award | Common Stock | 2,223 | $0.00 | - | |
| Eric B. Stang | Grant or award | Common Stock | 2,223 | $0.00 | - | |
 Victor Peng | Grant or award | Common Stock | 2,223 | $0.00 | - | |
| Charles Kissner | Grant or award | Common Stock | 2,223 | $0.00 | - | |
| John Shinn - Officer | Grant or award | Common Stock | 5,558 | $0.00 | - | |
| John Shinn - Officer | Tax withholding / forfeiture | Common Stock | 1,913 | $89.95 | $172K | |
 Luc Seraphin - Officer | Grant or award | Common Stock | 32,684 | $0.00 | - | |
| Luc Seraphin - Officer | Tax withholding / forfeiture | Common Stock | 12,561 | $89.95 | $1.13M | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 2,511 | $86.04 | $216K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 2,750 | $87.11 | $240K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 165 | $88.35 | $15K | |
| Xianzhi Sean Fan - Officer | Grant or award | Common Stock | 22,234 | $0.00 | - | |
| Xianzhi Sean Fan - Officer | Tax withholding / forfeiture | Common Stock | 9,916 | $89.95 | $892K | |
| John K. Allen - Officer | Grant or award | Common Stock | 2,779 | $0.00 | - | |
| John K. Allen - Officer | Tax withholding / forfeiture | Common Stock | 495 | $89.95 | $45K | |
| John K. Allen - Officer | Tax withholding / forfeiture | Common Stock | 658 | $89.95 | $59K | |
| John Shinn - Officer | Open-market sale | Common Stock | 200 | $89.55 | $18K | |
| John Shinn - Officer | Open-market sale | Common Stock | 4,356 | $88.64 | $386K | |
| John Shinn - Officer | Open-market sale | Common Stock | 1,603 | $94.07 | $151K | |
| John Shinn - Officer | Open-market sale | Common Stock | 700 | $94.89 | $66K | |
| John Shinn - Officer | Open-market sale | Common Stock | 2,254 | $92.77 | $209K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 9,469 | $99.17 | $939K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 6,587 | $100.20 | $660K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 1,300 | $101.65 | $132K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 1,679 | $95.83 | $161K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 7,225 | $97.38 | $704K | |
| Luc Seraphin - Officer | Open-market sale | Common Stock | 13,654 | $98.22 | $1.34M | |
| Victor Peng | Grant or award | Common Stock | 168 | $0.00 | - | |
 Desmond Lynch - Officer | Open-market sale | Common Stock | 4,273 | $101.53 | $434K | |
| John Shinn - Officer | Grant or award | Common Stock | 17,276 | $0.00 | - | |
| John Shinn - Officer | Tax withholding / forfeiture | Common Stock | 9,884 | $113.71 | $1.12M |
A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| KISSNER CHARLES | Director | 5,000 | $505K | View on EDGAR | |
| - | - | - | - | View on EDGAR | |
| - | - | - | - | View on EDGAR |
RAMBUS INC (RMBS) had 4 insider filings in the last 90 days, with the most recent on 2026-08-10. The full record for RMBS runs to 56 Form 4 filings, the earliest from 2024-12-12. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of RMBS were filed in the last 90 days.
5 insider sales of RMBS were filed in the last 90 days, totaling $3.69M.
This page tracks RMBS Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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