RAMBUS INC
RMBS · Semiconductors & Related Devices · 108.1M shares · -0%/yr ↓ buyback · EDGAR filings ↗
Net buyback after stock comp: $56M (gross $101M, SBC $45M)
Reference price $170.15 · est. market cap ~$18.4B — last insider sale, 2026-06-03 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
B78Memory-interface IP/chip licensor with strong returns, free cash flow, and a cash-rich balance sheet.
Strengths
- Strong returns — ROE 16.9% (76th), ROA 15.1% (90th)
- Strong FCF, cash-rich — FCF $333.2M (73rd), current ratio 8.20 (88th)
- Earnings growth — net income +28.2% (78th)
Risks
- Customer concentration — risk factors: revenue concentrated in a few licensees
- Industry cyclicality — per 10-K
- Royalty/licensing-renewal dependence — per 10-K
Notable findings
- Customer concentration~10% of revenue from one customer/distributor — Information on customers that comprise 10% or more of our consolidated revenue and risks attendant to our foreign operations is set forth below in Item 1A, “Risk Factors
- Exec changeRecent 8-K item 5.02 8-K ↗
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Strong balance sheetStrong balance sheet — $762M cash & investments
- Insider sellingInsider selling — 27 open-market sale(s) by 9 insider(s) (cluster of 9 insiders, ~$18M, last 6mo) Form 4 ↗
- Notable holderHeld by 5 notable fund(s): STATE STREET CORP, FMR LLC, GOLDMAN SACHS GROUP INC +2 more (as of 2026-03-31)
- China exposure• We are subject to various government restrictions and regulations, including on the sale of products and services that use encryption and other technology, those related to privacy, other consumer p
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Return on equity
16.9%
Return on assets
15.1%
Revenue growth (QoQ)
21.6%
Net-income growth
28.2%
Current ratio
8.2×
Free cash flow
$333M
EBITDA
$272M
Tangible book value
$1.1B
Cash & investments
$762M
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-03 | Sayiner Necip | Sell | 5.0K | $170.15 |
| 2026-06-02 | Higashi Emiko | Sell | 5.0K | $158.00 |
| 2026-06-02 | Higashi Emiko | Sell | 5.0K | $163.00 |
| 2026-06-01 | STANG ERIC B | Sell | 5.0K | $146.00 |
| 2026-05-26 | Higashi Emiko | Sell | 5.0K | $157.57 |
| 2026-05-26 | FAN XIANZHI SEAN | Sell | 38K | $151.69 |
| 2026-05-26 | FAN XIANZHI SEAN | Sell | 100 | $152.35 |
| 2026-05-22 | Shinn John | Sell | 1.0K | $143.63 |
| 2026-05-08 | Sayiner Necip | Sell | 9.8K | $130.18 |
| 2026-05-07 | LAUB STEVEN | Sell | 1.5K | $125.52 |
| 2026-05-01 | Gagneja Sumeet | Grant | 15K | — |
| 2026-05-01 | Gagneja Sumeet | Grant | 27K | — |
| 2026-04-24 | Rao Meera | Sell | 3.0K | $150.30 |
| 2026-04-14 | Rao Meera | Sell | 8.5K | $118.08 |
| 2026-04-03 | Allen John K | Tax withheld | 1.1K | $92.22 |
| 2026-04-02 | Seraphin Luc | Sell | 165 | $88.35 |
| 2026-04-02 | Seraphin Luc | Sell | 2.8K | $87.11 |
| 2026-04-02 | Seraphin Luc | Sell | 2.5K | $86.04 |
| 2026-04-01 | KISSNER CHARLES | Grant | 2.2K | — |
| 2026-04-01 | Higashi Emiko | Grant | 2.2K | — |
| 2026-04-01 | LAUB STEVEN | Grant | 2.2K | — |
| 2026-04-01 | Rao Meera | Grant | 2.2K | — |
| 2026-04-01 | Sayiner Necip | Grant | 2.2K | — |
| 2026-04-01 | STANG ERIC B | Grant | 2.2K | — |
| 2026-04-01 | PENG VICTOR | Grant | 2.2K | — |
| 2026-04-01 | Shinn John | Grant | 5.6K | — |
| 2026-04-01 | Shinn John | Tax withheld | 1.9K | $89.95 |
| 2026-04-01 | Seraphin Luc | Grant | 33K | — |
| 2026-04-01 | Seraphin Luc | Tax withheld | 13K | $89.95 |
| 2026-04-01 | FAN XIANZHI SEAN | Grant | 22K | — |
| 2026-04-01 | FAN XIANZHI SEAN | Tax withheld | 9.9K | $89.95 |
| 2026-04-01 | Allen John K | Grant | 2.8K | — |
| 2026-04-01 | Allen John K | Tax withheld | 495 | $89.95 |
| 2026-04-01 | Allen John K | Tax withheld | 658 | $89.95 |
| 2026-03-10 | Shinn John | Sell | 4.4K | $88.64 |
| 2026-03-10 | Shinn John | Sell | 200 | $89.55 |
| 2026-03-03 | Shinn John | Sell | 2.3K | $92.77 |
| 2026-03-03 | Shinn John | Sell | 1.6K | $94.07 |
| 2026-03-03 | Shinn John | Sell | 700 | $94.89 |
| 2026-03-02 | Seraphin Luc | Sell | 1.7K | $95.83 |
| 2026-03-02 | Seraphin Luc | Sell | 7.2K | $97.38 |
| 2026-03-02 | Seraphin Luc | Sell | 14K | $98.22 |
| 2026-03-02 | Seraphin Luc | Sell | 9.5K | $99.17 |
| 2026-03-02 | Seraphin Luc | Sell | 6.6K | $100.20 |
| 2026-03-02 | Seraphin Luc | Sell | 1.3K | $101.65 |
| 2026-03-02 | PENG VICTOR | Grant | 168 | — |
| 2026-02-23 | Lynch Desmond | Sell | 4.3K | $101.53 |
| 2026-02-01 | Shinn John | Grant | 17K | — |
| 2026-02-01 | Shinn John | Tax withheld | 9.9K | $113.71 |
| 2026-02-01 | Lynch Desmond | Grant | 35K | — |
| 2026-02-01 | Lynch Desmond | Tax withheld | 22K | $113.71 |
| 2026-02-01 | Seraphin Luc | Grant | 144K | — |
| 2026-02-01 | Seraphin Luc | Tax withheld | 93K | $113.71 |
| 2026-02-01 | FAN XIANZHI SEAN | Grant | 149K | — |
| 2026-02-01 | FAN XIANZHI SEAN | Tax withheld | 92K | $113.71 |
| 2025-11-21 | FAN XIANZHI SEAN | Gift | 300 | — |
| 2025-11-19 | FAN XIANZHI SEAN | Gift | 300 | — |
| 2025-11-10 | STANG ERIC B | Sell | 4.0K | $111.78 |
| 2025-11-07 | STANG ERIC B | Sell | 5.0K | $102.35 |
| 2025-10-06 | Lynch Desmond | Sell | 5.5K | $101.17 |
| 2025-10-06 | Lynch Desmond | Sell | 3.6K | $101.99 |
| 2025-10-01 | Rao Meera | Sell | 653 | $101.99 |
| 2025-09-15 | Lynch Desmond | Sell | 9.1K | $91.70 |
| 2025-09-11 | Sayiner Necip | Sell | 7.5K | $85.63 |
| 2025-09-02 | Rao Meera | Sell | 3.0K | $71.72 |
| 2025-09-01 | Lynch Desmond | Tax withheld | 2.7K | $73.48 |
| 2025-08-29 | LAUB STEVEN | Sell | 2.3K | $78.72 |
| 2025-08-13 | Higashi Emiko | Sell | 1.1K | $77.75 |
| 2025-08-08 | Sayiner Necip | Sell | 7.5K | $73.53 |
| 2025-08-04 | Shinn John | Sell | 790 | $74.61 |
| 2025-08-04 | Higashi Emiko | Sell | 1.1K | $75.00 |
| 2025-05-27 | LAUB STEVEN | Sell | 1.8K | $55.12 |
| 2025-05-19 | LAUB STEVEN | Sell | 3.7K | $55.56 |
| 2025-05-09 | STANG ERIC B | Sell | 3.7K | $51.13 |
| 2025-05-05 | Lynch Desmond | Sell | 3.1K | $50.31 |
| 2025-04-23 | Seraphin Luc | Sell | 6.3K | $46.97 |
| 2025-04-22 | Seraphin Luc | Sell | 1.3K | $45.00 |
| 2025-04-15 | Seraphin Luc | Sell | 10K | $47.79 |
| 2025-04-08 | Seraphin Luc | Sell | 10K | $46.81 |
| 2025-04-03 | Allen John K | Tax withheld | 1.1K | $46.15 |
| 2025-04-01 | Shinn John | Grant | 8.6K | — |
| 2025-04-01 | Allen John K | Grant | 5.2K | — |
| 2025-04-01 | Allen John K | Tax withheld | 490 | $52.29 |
| 2025-04-01 | LAUB STEVEN | Grant | 3.8K | — |
| 2025-04-01 | Sayiner Necip | Grant | 3.8K | — |
| 2025-04-01 | Rao Meera | Grant | 3.8K | — |
| 2025-04-01 | Higashi Emiko | Grant | 3.8K | — |
| 2025-04-01 | KISSNER CHARLES | Grant | 3.8K | — |
| 2025-04-01 | STANG ERIC B | Grant | 3.8K | — |
| 2025-04-01 | Lynch Desmond | Grant | 18K | — |
| 2025-04-01 | Lynch Desmond | Tax withheld | 1.8K | $52.29 |
| 2025-04-01 | Shinn John | Tax withheld | 817 | $52.29 |
| 2025-04-01 | FAN XIANZHI SEAN | Grant | 48K | — |
| 2025-04-01 | FAN XIANZHI SEAN | Tax withheld | 3.5K | $52.29 |
| 2025-04-01 | Seraphin Luc | Grant | 55K | — |
| 2025-04-01 | Seraphin Luc | Tax withheld | 5.2K | $52.29 |
| 2025-04-01 | Seraphin Luc | Sell | 10K | $50.88 |
| 2025-03-25 | Seraphin Luc | Sell | 10K | $58.64 |
| 2025-03-21 | Shinn John | Sell | 7.6K | $55.73 |
| 2025-03-18 | Seraphin Luc | Sell | 10K | $53.79 |
| 2025-03-14 | Shinn John | Sell | 7.6K | $52.98 |
| 2025-03-14 | Lynch Desmond | Sell | 3.7K | $53.27 |
| 2025-02-19 | Sayiner Necip | Sell | 4.6K | $66.74 |
| 2025-02-19 | FAN XIANZHI SEAN | Sell | 52K | $68.02 |
| 2025-02-01 | Lynch Desmond | Grant | 39K | — |
| 2025-02-01 | Lynch Desmond | Tax withheld | 26K | $60.35 |
| 2025-02-01 | Shinn John | Grant | 19K | — |
| 2025-02-01 | Shinn John | Tax withheld | 11K | $60.35 |
| 2025-02-01 | FAN XIANZHI SEAN | Grant | 113K | — |
| 2025-02-01 | FAN XIANZHI SEAN | Tax withheld | 78K | $60.35 |
| 2025-02-01 | Seraphin Luc | Grant | 192K | — |
| 2025-02-01 | Seraphin Luc | Tax withheld | 128K | $60.35 |
All non-derivative Form 4 activity (SEC), newest first.
Supply chain
Customers (23)
- Winbond
- Western Digital
- AMD
- Amlogic
- Broadcom
- CXMT
- IBM
- Infineon
- Kioxia
- Marvell
- MediaTek
- Micron
- Nanya
- Nuvoton
- NVIDIA
- Phison
- Qualcomm
- Samsung
- Silicon Motion
- SK hynix
- Socionext
- STMicroelectronics
- Toshiba
Suppliers (0)
Named in the 10-K; linked when we track them.
Notable events (8-K)
| Date | Items | |
|---|---|---|
| 2026-04-29 | Exec/director changeExhibits | filing ↗ |
| 2026-04-27 | ResultsExhibits | filing ↗ |
| 2026-04-24 | Shareholder voteOther | filing ↗ |
| 2026-02-12 | Exec/director changeExhibits | filing ↗ |
| 2026-02-10 | Exec/director changeExhibits | filing ↗ |
| 2026-02-02 | ResultsExhibits | filing ↗ |
| 2025-10-27 | ResultsExhibits | filing ↗ |
| 2025-07-28 | ResultsExhibits | filing ↗ |
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-04-29 | 2026-04-29 | 0001193125-26-192210 ↗ |
| 10-Q | 2026-04-28 | 2026-03-31 | 0001193125-26-186931 ↗ |
| 8-K | 2026-04-27 | 2026-04-27 | 0001193125-26-182076 ↗ |
| 8-K | 2026-04-24 | 2026-04-23 | 0001193125-26-177140 ↗ |
| 10-K | 2026-02-18 | 2025-12-31 | 0001193125-26-057101 ↗ |
| 8-K | 2026-02-12 | 2026-02-12 | 0001193125-26-048728 ↗ |
| 8-K | 2026-02-10 | 2026-02-04 | 0001193125-26-044677 ↗ |
| 8-K | 2026-02-02 | 2026-02-02 | 0001193125-26-033624 ↗ |
| 10-Q | 2025-10-28 | 2025-09-30 | 0001193125-25-253472 ↗ |
| 8-K | 2025-10-27 | 2025-10-27 | 0001193125-25-251595 ↗ |
| 10-Q | 2025-07-29 | 2025-06-30 | 0000950170-25-099621 ↗ |
| 8-K | 2025-07-28 | 2025-07-28 | 0000950170-25-099166 ↗ |