Rambus Inc
RMBS- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0000917273
In the last 90 days, Rambus Inc insiders filed 0 open-market purchases and 2 sales; 627 institutions reported holding it in 13F filings for Q2 2026, worth $13.3B in total; superinvestors Duquesne Family Office and Maverick Capital hold it.
Key figures
- Market capClose on Nov 11, 2026
- $9.14B
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $1.08M in total
- 2
- 13F holdersQ2 2026, +72 vs. previous quarter
- 627
- 13F valueReported value at the end of Q2 2026
- $13.3B
- Superinvestors holdingAt the end of Q2 2026
- 2
Price chart
Financials
See financial statementsFrom SEC filings, in USD.
- Revenue, FY2025
- $707.6M
- +27.1% year over year
- Net income, FY2025
- $230.5M
- +28.2% year over year
- Free cash flow, FY2025
- $333.2M
- +66.7% year over year
- Revenue, Q3 FY2026
- $218.3M
- +22.3% year over year
Revenue flow, FY2025
Green is profit; orange is costs, expenses and taxes. Percentages are shares of revenue.
Short interest
See short dataFrom FINRA, settlement date Oct 30, 2026.
- Short interest
- 4.47M
- Shares sold short
- Change
- +186.8K
- +4.4% vs. previous
- Days to cover
- 2.06
- At average daily volume
Superinvestors holding RMBS, Q2 2026
Go to the superinvestors tab2 superinvestors report holding Rambus Inc on Form 13F. Percentages are the stock's share of each portfolio.
Duquesne Family Office
Stanley Druckenmiller
0.5%
Rambus Inc's share of the portfolio
- Shares
- 173,000
- Value
- $23.0M
Latest insider trades
See all insider tradesOpen-market purchases and sales by Rambus Inc insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Oct 5, 2026 (view filing)2:44 PM ET | Oct 2 | 3 days | Kissner CharlesDirector | SSale | −5.00K | $111.00 | −$555.0K | −57.2%3.75K after | 10b5-1 |
| Sep 24, 2026 (view filing)1:04 PM ET | Sep 22 | 2 days | Kissner CharlesDirector | SSale | −5.00K | $105.00 | −$525.0K | −36.4%8.75K after | 10b5-1 |
| Aug 10, 2026 (view filing)7:58 PM ET | Aug 7 | 3 days | Kissner CharlesDirector | SSale | −5.00K | $100.92 | −$504.6K | −26.7%13.7K after | 10b5-1 |
| Jun 3, 2026 (view filing) | Jun 3 | Same day | Sayiner NecipDirector | SSale | −5.00K | $170.15 | −$850.8K | −21.5%18.2K after | |
| Jun 3, 2026 (view filing) | Jun 2 | 1 day | Higashi EmikoDirector | SSale | −10.0K | $160.50 | −$1.60M | −16.8%49.5K after | 2 lots |
| Jun 2, 2026 (view filing) | Jun 1 | 1 day | Stang Eric BDirector | SSale | −5.00K | $146.00 | −$730.0K | −20.6%19.2K after | |
| May 27, 2026 (view filing) | May 26 | 1 day | Higashi EmikoDirector | SSale | −5.00K | $157.57 | −$787.9K | −7.7%59.5K after | |
| May 26, 2026 (view filing) | May 26 | Same day | Fan Xianzhi SeanEVP, COO | SSale | −37.9K | $151.69 | −$5.75M | −18.4%168.4K after | 2 lots |
| May 26, 2026 (view filing) | May 22 | 4 days | Shinn JohnSVP, General Counsel | SSale | −1.00K | $143.63 | −$143.6K | −4.5%21.1K after | |
| May 11, 2026 (view filing) | May 8 | 3 days | Sayiner NecipDirector | SSale | −9.82K | $130.18 | −$1.28M | −29.7%23.2K after |
Top 10 13F holders, Q2 2026
See all 627 holdersThe largest institutional positions in Rambus Inc at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 13,964,477 | $1.85B | 0.03% | −2,340,829−14.4% | Reduced |
| FMR LLC | 10,460,026 | $1.39B | 0.06% | +7,141,577+215.2% | Added |
| Invesco Ltd. | 6,632,458 | $880.4M | 0.07% | +133,410+2.1% | Added |
| Vanguard Portfolio Management LLC | 6,068,516 | $805.5M | 0.04% | −575,804−8.7% | Reduced |
| Vanguard Capital Management LLC | 4,874,385 | $647.0M | 0.01% | +46,531+1.0% | Added |
| State Street Corp | 3,915,113 | $519.5M | 0.02% | −458,504−10.5% | Reduced |
| Price T Rowe Associates Inc | 3,334,512 | $442.6M | 0.04% | −42,177−1.2% | Reduced |
| Geode Capital Management, LLC | 2,297,660 | $305.1M | 0.02% | −826,835−26.5% | Reduced |
| JPMorgan Chase & Co | 2,101,418 | $261.0M | 0.02% | +264,918+14.4% | Added |
| Dimensional Fund Advisors LP | 1,719,400 | $228.2M | 0.04% | −75,895−4.2% | Reduced |
Holders of 5% or more of RMBS
See all 5 holders and filingsHolders whose latest Schedule 13D or 13G filing reports 5% or more of Rambus Inc.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 10.40%11.3M shares | −1.80 ppfrom 12.20% | Oct 23, 20245 filings | Oct 27, 2026 | SEC |
| FMR LLC | 13G/A | 6.60%7.11M shares | −3.80 ppfrom 10.40% | Jun 5, 20262 filings | Nov 5, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 6.23%6.74M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
| Invesco Ltd. | 13G | 6.00%6.50M shares | New | May 6, 20261 filing | May 6, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 5.22%5.65M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
Politician trades
All politician trades in RMBS1 member of Congress reported 1 trade in Rambus Inc since 2020. Newest filings:
| Filed | Politician | Type | Amount |
|---|---|---|---|
| Sep 5, 2023 |  Thomas R. Carper Senate · DE | Sell (full) | $1K-$15K |
Senate · DE · Sep 5, 2023
Sell (full)$1K-$15K