RMBS
Rambus Inc
NASDAQ: RMBS · TECHNOLOGY · SEMICONDUCTORS
$91.03
+2.38% today
Updated 2026-10-28
Market cap
$9.46B
P/E ratio
40.02
P/S ratio
12.51x
EPS (TTM)
$2.18
Dividend yield
—
52W range
$78 – $174
Volume
2.2M
Rambus Inc (RMBS) Insider transactions
Net insider activity
Net buying (101,226 shares)
Buy transactions
29
Sell transactions
70
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-10-02 | KISSNER, CHARLES | Director | S | 5,000 | $111.00 | $555000.00 |
| 2026-09-22 | KISSNER, CHARLES | Director | Sale | 5,000 | $105.00 | $525000.00 |
| 2026-08-07 | KISSNER, CHARLES | Director | Sale | 5,000 | $100.92 | $504600.00 |
| 2026-06-03 | SAYINER, NECIP | Director | Sale | 5,000 | $170.15 | $850750.00 |
| 2026-06-02 | HIGASHI, EMIKO | Director | Sale | 5,000 | $158.00 | $790000.00 |
| 2026-06-01 | STANG, ERIC B | Director | Sale | 5,000 | $146.00 | $730000.00 |
| 2026-05-26 | HIGASHI, EMIKO | Director | Sale | 5,000 | $157.57 | $787850.50 |
| 2026-05-26 | FAN, XIANZHI SEAN | EVP, COO | Sale | 37,814 | $151.69 | $5.74M |
| 2026-05-26 | FAN, XIANZHI SEAN | EVP, COO | Sale | 100 | $152.35 | $15235.00 |
| 2026-05-22 | SHINN, JOHN | SVP, General Counsel | Sale | 1,000 | $143.63 | $143630.00 |
| 2026-05-08 | SAYINER, NECIP | Director | Sale | 9,824 | $130.18 | $1.28M |
| 2026-05-07 | LAUB, STEVEN | Director | Sale | 1,500 | $125.52 | $188279.25 |
| 2026-05-01 | GAGNEJA, SUMEET | SVP, CFO | Buy | 26,802 | — | — |
| 2026-05-01 | GAGNEJA, SUMEET | SVP, CFO | Buy | 14,518 | — | — |
| 2026-04-24 | RAO, MEERA | Director | Sale | 2,972 | $150.30 | $446691.60 |
| 2026-04-14 | RAO, MEERA | Director | Sale | 8,538 | $118.08 | $1.01M |
| 2026-04-03 | ALLEN, JOHN K | Chief Accounting Officer | Sale | 1,131 | $92.22 | $104300.82 |
| 2026-04-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 2,750 | $87.11 | $239564.88 |
| 2026-04-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 2,511 | $86.04 | $216045.44 |
| 2026-04-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 165 | $88.35 | $14577.77 |
| 2026-04-01 | STANG, ERIC B | Director | Buy | 2,223 | — | — |
| 2026-04-01 | SHINN, JOHN | SVP, General Counsel | Buy | 5,558 | — | — |
| 2026-04-01 | SHINN, JOHN | SVP, General Counsel | Sale | 1,913 | $89.95 | $172074.35 |
| 2026-04-01 | SERAPHIN, LUC | Director, President and CEO | Buy | 32,684 | — | — |
| 2026-04-01 | SERAPHIN, LUC | Director, President and CEO | Sale | 12,561 | $89.95 | $1.13M |
| 2026-04-01 | SAYINER, NECIP | Director | Buy | 2,223 | — | — |
| 2026-04-01 | RAO, MEERA | Director | Buy | 2,223 | — | — |
| 2026-04-01 | PENG, VICTOR | Director | Buy | 2,223 | — | — |
| 2026-04-01 | LAUB, STEVEN | Director | Buy | 2,223 | — | — |
| 2026-04-01 | KISSNER, CHARLES | Director | Buy | 2,223 | — | — |
| 2026-04-01 | HIGASHI, EMIKO | Director | Buy | 2,223 | — | — |
| 2026-04-01 | FAN, XIANZHI SEAN | EVP, COO | Buy | 22,234 | — | — |
| 2026-04-01 | FAN, XIANZHI SEAN | EVP, COO | Sale | 9,916 | $89.95 | $891944.20 |
| 2026-04-01 | ALLEN, JOHN K | Chief Accounting Officer | Buy | 2,779 | — | — |
| 2026-04-01 | ALLEN, JOHN K | Chief Accounting Officer | Sale | 658 | $89.95 | $59187.10 |
| 2026-04-01 | ALLEN, JOHN K | Chief Accounting Officer | Sale | 495 | $89.95 | $44525.25 |
| 2026-03-10 | SHINN, JOHN | SVP, General Counsel | Sale | 4,356 | $88.64 | $386098.85 |
| 2026-03-10 | SHINN, JOHN | SVP, General Counsel | Sale | 200 | $89.55 | $17909.00 |
| 2026-03-03 | SHINN, JOHN | SVP, General Counsel | Sale | 2,254 | $92.77 | $209104.48 |
| 2026-03-03 | SHINN, JOHN | SVP, General Counsel | Sale | 1,603 | $94.07 | $150793.89 |
| 2026-03-03 | SHINN, JOHN | SVP, General Counsel | Sale | 700 | $94.89 | $66420.97 |
| 2026-03-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 13,654 | $98.22 | $1.34M |
| 2026-03-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 9,469 | $99.17 | $939001.91 |
| 2026-03-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 7,225 | $97.38 | $703569.06 |
| 2026-03-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 6,587 | $100.20 | $660003.57 |
| 2026-03-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 1,679 | $95.83 | $160900.58 |
| 2026-03-02 | SERAPHIN, LUC | Director, President and CEO | Sale | 1,300 | $101.65 | $132149.94 |
| 2026-03-02 | PENG, VICTOR | Director | Buy | 168 | — | — |
| 2026-02-23 | LYNCH, DESMOND | SVP, CFO | Sale | 4,273 | $101.53 | $433837.69 |
| 2026-02-01 | SHINN, JOHN | SVP, General Counsel | Buy | 17,276 | — | — |
| 2026-02-01 | SHINN, JOHN | SVP, General Counsel | Sale | 9,884 | $113.71 | $1.12M |
| 2026-02-01 | SERAPHIN, LUC | Director, President and CEO | Buy | 143,744 | — | — |
| 2026-02-01 | SERAPHIN, LUC | Director, President and CEO | Sale | 92,523 | $113.71 | $10.52M |
| 2026-02-01 | LYNCH, DESMOND | SVP, CFO | Buy | 34,554 | — | — |
| 2026-02-01 | LYNCH, DESMOND | SVP, CFO | Sale | 22,105 | $113.71 | $2.51M |
| 2026-02-01 | FAN, XIANZHI SEAN | EVP, COO | Buy | 148,802 | — | — |
| 2026-02-01 | FAN, XIANZHI SEAN | EVP, COO | Sale | 92,403 | $113.71 | $10.51M |
| 2025-11-21 | FAN, XIANZHI SEAN | EVP, COO | Sale | 300 | — | — |
| 2025-11-19 | FAN, XIANZHI SEAN | EVP, COO | Sale | 300 | — | — |
| 2025-11-10 | STANG, ERIC B | Director | Sale | 4,000 | $111.79 | $447140.00 |
| 2025-11-07 | STANG, ERIC B | Director | Sale | 5,000 | $102.35 | $511760.00 |
| 2025-10-06 | LYNCH, DESMOND | SVP, CFO | Sale | 5,467 | $101.17 | $553086.00 |
| 2025-10-06 | LYNCH, DESMOND | SVP, CFO | Sale | 3,607 | $101.99 | $367886.59 |
| 2025-10-01 | RAO, MEERA | Director | Sale | 653 | $101.99 | $66599.47 |
| 2025-09-15 | LYNCH, DESMOND | SVP, CFO | Sale | 9,074 | $91.70 | $832098.50 |
| 2025-09-11 | SAYINER, NECIP | Director | Sale | 7,500 | $85.63 | $642225.75 |
| 2025-09-02 | RAO, MEERA | Director | Sale | 3,000 | $71.72 | $215160.00 |
| 2025-09-01 | LYNCH, DESMOND | SVP, CFO | Sale | 2,725 | $73.49 | $200246.63 |
| 2025-08-29 | LAUB, STEVEN | Director | Sale | 2,261 | $78.72 | $177994.96 |
| 2025-08-13 | HIGASHI, EMIKO | Director | Sale | 1,075 | $77.75 | $83581.25 |
| 2025-08-08 | SAYINER, NECIP | Director | Sale | 7,500 | $73.53 | $551448.00 |
| 2025-08-04 | SHINN, JOHN | SVP, General Counsel | Sale | 790 | $74.61 | $58944.90 |
| 2025-08-04 | HIGASHI, EMIKO | Director | Sale | 1,111 | $75.00 | $83325.00 |
| 2025-05-27 | LAUB, STEVEN | Director | Sale | 1,847 | $55.13 | $101815.88 |
| 2025-05-19 | LAUB, STEVEN | Director | Sale | 3,653 | $55.56 | $202960.68 |
| 2025-05-09 | STANG, ERIC B | Director | Sale | 3,653 | $51.13 | $186777.89 |
| 2025-05-05 | LYNCH, DESMOND | SVP, CFO | Sale | 3,118 | $50.31 | $156866.58 |
| 2025-04-23 | SERAPHIN, LUC | Director, President and CEO | Sale | 6,348 | $46.97 | $298165.56 |
| 2025-04-22 | SERAPHIN, LUC | Director, President and CEO | Sale | 1,255 | $45.00 | $56475.00 |
| 2025-04-15 | SERAPHIN, LUC | Director, President and CEO | Sale | 10,000 | $47.79 | $477868.00 |
| 2025-04-08 | SERAPHIN, LUC | Director, President and CEO | Sale | 10,000 | $46.81 | $468100.00 |
| 2025-04-03 | ALLEN, JOHN K | Chief Accounting Officer | Sale | 1,129 | $46.15 | $52103.35 |
| 2025-04-01 | STANG, ERIC B | Director | Buy | 3,824 | — | — |
| 2025-04-01 | SHINN, JOHN | SVP, General Counsel | Buy | 8,605 | — | — |
| 2025-04-01 | SHINN, JOHN | SVP, General Counsel | Sale | 817 | $52.29 | $42720.93 |
| 2025-04-01 | SERAPHIN, LUC | Director, President and CEO | Buy | 55,077 | — | — |
| 2025-04-01 | SERAPHIN, LUC | Director, President and CEO | Sale | 10,000 | $50.88 | $508815.00 |
| 2025-04-01 | SERAPHIN, LUC | Director, President and CEO | Sale | 5,164 | $52.29 | $270025.56 |
| 2025-04-01 | SAYINER, NECIP | Director | Buy | 3,824 | — | — |
| 2025-04-01 | RAO, MEERA | Director | Buy | 3,824 | — | — |
| 2025-04-01 | LYNCH, DESMOND | SVP, CFO | Buy | 18,167 | — | — |
| 2025-04-01 | LYNCH, DESMOND | SVP, CFO | Sale | 1,829 | $52.29 | $95638.41 |
| 2025-04-01 | LAUB, STEVEN | Director | Buy | 3,824 | — | — |
| 2025-04-01 | KISSNER, CHARLES | Director | Buy | 3,824 | — | — |
| 2025-04-01 | HIGASHI, EMIKO | Director | Buy | 3,824 | — | — |
| 2025-04-01 | FAN, XIANZHI SEAN | EVP, COO | Buy | 47,810 | — | — |
| 2025-04-01 | FAN, XIANZHI SEAN | EVP, COO | Sale | 3,496 | $52.29 | $182805.84 |
| 2025-04-01 | ALLEN, JOHN K | Chief Accounting Officer | Buy | 5,168 | — | — |
| 2025-04-01 | ALLEN, JOHN K | Chief Accounting Officer | Sale | 490 | $52.29 | $25622.10 |
| 2025-03-25 | SERAPHIN, LUC | Director, President and CEO | Sale | 10,000 | $58.64 | $586406.00 |
Frequently asked questions
Are RMBS insiders buying or selling?
Over the transactions on record, RMBS insiders have been net sellers, with about $54.25M in stock sold across 70 sales. The entries tagged as buys are stock grants and option exercises recorded at $0, not open-market purchases.
Does insider selling at RMBS mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which RMBS insiders are selling the most?
Recent selling is concentrated in a few names. SERAPHIN, LUC accounts for the largest share on record, with about $18.72M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.