Rambus (RMBS)
Market Price (6/6/2026): $143.26 | Market Cap: $15.5 BilSector: Information Technology | Industry: Semiconductors
Rambus (RMBS)
Market Price (6/6/2026): $143.26Market Cap: $15.5 BilSector: Information TechnologyIndustry: Semiconductors
Investment Highlights Why It Matters Detailed financial logic regarding cash flow yields vs trend-riding momentum.
Attractive operating marginsOp Mgn LTMOperating Margin = Operating Income / Revenue Reflects profitability before taxes and before impact of capital structure (interest payments). is 36% Attractive cash flow generationCFO/Rev LTMCash Flow from Operations / Revenue (Sales), Last Twelve Months (LTM) is 51%, FCF/Rev LTMFree Cash Flow / Revenue (Sales), Last Twelve Months (LTM) is 46% Megatrend and thematic driversMegatrends include Artificial Intelligence, and Cybersecurity. Themes include AI Chips, Data Centers & Infrastructure, Show more. | Expensive valuation multiplesP/SPrice/Sales ratio is 22x, P/EPrice/Earnings or Price/(Net Income) is 68x Stock price has recently run up significantly12M Rtn12 month market price return is 157% Valuation getting more expensiveP/S 6M Chg %Price/Sales change over 6 months. Declining P/S indicates valuation has become less expensive. is 56% Yield minus risk free rate is negativeERPEquity Risk Premium (ERP) = Total Yield - Risk Free Rate, Reflects the premium above risk free assets offered by the investment. is -2.7% Key risksRMBS key risks include [1] its inherent patent and intellectual property challenges, Show more. |
| Attractive operating marginsOp Mgn LTMOperating Margin = Operating Income / Revenue Reflects profitability before taxes and before impact of capital structure (interest payments). is 36% |
| Attractive cash flow generationCFO/Rev LTMCash Flow from Operations / Revenue (Sales), Last Twelve Months (LTM) is 51%, FCF/Rev LTMFree Cash Flow / Revenue (Sales), Last Twelve Months (LTM) is 46% |
| Megatrend and thematic driversMegatrends include Artificial Intelligence, and Cybersecurity. Themes include AI Chips, Data Centers & Infrastructure, Show more. |
| Expensive valuation multiplesP/SPrice/Sales ratio is 22x, P/EPrice/Earnings or Price/(Net Income) is 68x |
| Stock price has recently run up significantly12M Rtn12 month market price return is 157% |
| Valuation getting more expensiveP/S 6M Chg %Price/Sales change over 6 months. Declining P/S indicates valuation has become less expensive. is 56% |
| Yield minus risk free rate is negativeERPEquity Risk Premium (ERP) = Total Yield - Risk Free Rate, Reflects the premium above risk free assets offered by the investment. is -2.7% |
| Key risksRMBS key risks include [1] its inherent patent and intellectual property challenges, Show more. |
Qualitative Assessment
AI Analysis | Feedback
Rambus (RMBS) stock has gained about 45% since 2/28/2026 because of the following key factors:
1. Ramping demand in AI and data center markets fueled by Rambus's specialized memory solutions. Rambus's robust product and IP offerings, including its DDR5 memory interface chips and industry-leading HBM4E memory controller IP, are strategically positioned for the expanding AI and data center infrastructure. The company exited fiscal year 2025 with a mid-40% market share in DDR5 RCDs, indicating strong competitive standing. Rambus management anticipates the ramp of its high-capacity, high-bandwidth MRDIMM solutions to begin in fiscal year 2027, driven by upcoming server platform rollouts from Intel and AMD.
2. Strong financial performance in fiscal Q1 2026 and positive guidance for fiscal Q2 2026. Rambus reported solid fiscal Q1 2026 results on April 27, 2026, with GAAP revenue reaching $180.2 million, surpassing the midpoint of its guidance and slightly exceeding consensus estimates. Product revenue surged 15% year-over-year to $88.0 million, and non-GAAP diluted earnings per share (EPS) of $0.63 beat analyst consensus. The company provided optimistic guidance for fiscal Q2 2026, projecting product revenue to further increase to between $95 million and $101 million and non-GAAP EPS to be in the range of $0.65 to $0.73.
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Stock Movement Drivers
Fundamental Drivers
The 45.8% change in RMBS stock from 2/28/2026 to 6/5/2026 was primarily driven by a 46.5% change in the company's P/E Multiple.| (LTM values as of) | 2282026 | 6052026 | Change |
|---|---|---|---|
| Stock Price ($) | 99.66 | 145.31 | 45.8% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 708 | 721 | 1.9% |
| Net Income Margin (%) | 32.6% | 31.9% | -2.1% |
| P/E Multiple | 46.6 | 68.2 | 46.5% |
| Shares Outstanding (Mil) | 108 | 108 | -0.3% |
| Cumulative Contribution | 45.8% |
Market Drivers
2/28/2026 to 6/5/2026| Return | Correlation | |
|---|---|---|
| RMBS | 45.8% | |
| Market (SPY) | 7.8% | 55.8% |
| Sector (XLK) | 30.1% | 65.4% |
Fundamental Drivers
The 52.0% change in RMBS stock from 11/30/2025 to 6/5/2026 was primarily driven by a 51.8% change in the company's P/E Multiple.| (LTM values as of) | 11302025 | 6052026 | Change |
|---|---|---|---|
| Stock Price ($) | 95.57 | 145.31 | 52.0% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 678 | 721 | 6.3% |
| Net Income Margin (%) | 33.7% | 31.9% | -5.4% |
| P/E Multiple | 45.0 | 68.2 | 51.8% |
| Shares Outstanding (Mil) | 108 | 108 | -0.4% |
| Cumulative Contribution | 52.0% |
Market Drivers
11/30/2025 to 6/5/2026| Return | Correlation | |
|---|---|---|
| RMBS | 52.0% | |
| Market (SPY) | 8.5% | 54.1% |
| Sector (XLK) | 26.3% | 62.0% |
Fundamental Drivers
The 171.8% change in RMBS stock from 5/31/2025 to 6/5/2026 was primarily driven by a 146.7% change in the company's P/E Multiple.| (LTM values as of) | 5312025 | 6052026 | Change |
|---|---|---|---|
| Stock Price ($) | 53.47 | 145.31 | 171.8% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 605 | 721 | 19.1% |
| Net Income Margin (%) | 34.2% | 31.9% | -6.8% |
| P/E Multiple | 27.7 | 68.2 | 146.7% |
| Shares Outstanding (Mil) | 107 | 108 | -0.7% |
| Cumulative Contribution | 171.8% |
Market Drivers
5/31/2025 to 6/5/2026| Return | Correlation | |
|---|---|---|
| RMBS | 171.8% | |
| Market (SPY) | 26.6% | 54.6% |
| Sector (XLK) | 57.1% | 62.2% |
Fundamental Drivers
The 127.2% change in RMBS stock from 5/31/2023 to 6/5/2026 was primarily driven by a 171.3% change in the company's Net Income Margin (%).| (LTM values as of) | 5312023 | 6052026 | Change |
|---|---|---|---|
| Stock Price ($) | 63.96 | 145.31 | 127.2% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 470 | 721 | 53.6% |
| Net Income Margin (%) | 11.8% | 31.9% | 171.3% |
| P/E Multiple | 125.5 | 68.2 | -45.6% |
| Shares Outstanding (Mil) | 108 | 108 | 0.2% |
| Cumulative Contribution | 127.2% |
Market Drivers
5/31/2023 to 6/5/2026| Return | Correlation | |
|---|---|---|
| RMBS | 127.2% | |
| Market (SPY) | 83.4% | 59.8% |
| Sector (XLK) | 124.1% | 67.8% |
Price Returns Compared
| 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Total [1] | |
|---|---|---|---|---|---|---|---|
| Returns | |||||||
| RMBS Return | 68% | 22% | 91% | -23% | 74% | 84% | 870% |
| Peers Return | 44% | -21% | 30% | 8% | 19% | 97% | 278% |
| S&P 500 Return | 27% | -19% | 24% | 23% | 16% | 11% | 102% |
Monthly Win Rates [3] | |||||||
| RMBS Win Rate | 67% | 58% | 58% | 50% | 42% | 67% | |
| Peers Win Rate | 65% | 37% | 67% | 52% | 52% | 77% | |
| S&P 500 Win Rate | 75% | 42% | 67% | 75% | 67% | 67% | |
Max Drawdowns [4] | |||||||
| RMBS Max Drawdown | -18% | -39% | -27% | -49% | -37% | -37% | |
| Peers Max Drawdown | -19% | -38% | -25% | -25% | -37% | -18% | |
| S&P 500 Max Drawdown | -5% | -25% | -10% | -8% | -19% | -9% | |
[1] Cumulative total returns since the beginning of 2021
[2] Peers: AMAT, TXN, ADI, MTSI, DIOD. See RMBS Returns vs. Peers.
[3] Win Rate = % of calendar months in which monthly returns were positive
[4] Max drawdown represents maximum peak-to-trough decline within a year
[5] 2026 data is for the year up to 6/5/2026 (YTD)
How Low Can It Go
| Event | RMBS | S&P 500 |
|---|---|---|
| 2025 US Tariff Shock | ||
| % Loss | -35.3% | -18.8% |
| % Gain to Breakeven | 54.6% | 23.1% |
| Time to Breakeven | 99 days | 79 days |
| 2024 Yen Carry Trade Unwind | ||
| % Loss | -39.2% | -7.8% |
| % Gain to Breakeven | 64.4% | 8.5% |
| Time to Breakeven | 182 days | 18 days |
| Summer-Fall 2023 Five Percent Yield Shock | ||
| % Loss | -20.4% | -9.5% |
| % Gain to Breakeven | 25.6% | 10.5% |
| Time to Breakeven | 13 days | 24 days |
| 2022 Inflation Shock & Fed Tightening | ||
| % Loss | -29.8% | -24.5% |
| % Gain to Breakeven | 42.4% | 32.4% |
| Time to Breakeven | 118 days | 427 days |
| 2020 COVID-19 Crash | ||
| % Loss | -43.4% | -33.7% |
| % Gain to Breakeven | 76.6% | 50.9% |
| Time to Breakeven | 85 days | 140 days |
| Q4 2018 Fed Policy Error / Growth Scare | ||
| % Loss | -30.6% | -19.2% |
| % Gain to Breakeven | 44.0% | 23.8% |
| Time to Breakeven | 58 days | 105 days |
In The Past
Rambus's stock fell -35.3% during the 2025 US Tariff Shock. Such a loss loss requires a 54.6% gain to breakeven.
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| Event | RMBS | S&P 500 |
|---|---|---|
| 2025 US Tariff Shock | ||
| % Loss | -35.3% | -18.8% |
| % Gain to Breakeven | 54.6% | 23.1% |
| Time to Breakeven | 99 days | 79 days |
| 2024 Yen Carry Trade Unwind | ||
| % Loss | -39.2% | -7.8% |
| % Gain to Breakeven | 64.4% | 8.5% |
| Time to Breakeven | 182 days | 18 days |
| Summer-Fall 2023 Five Percent Yield Shock | ||
| % Loss | -20.4% | -9.5% |
| % Gain to Breakeven | 25.6% | 10.5% |
| Time to Breakeven | 13 days | 24 days |
| 2022 Inflation Shock & Fed Tightening | ||
| % Loss | -29.8% | -24.5% |
| % Gain to Breakeven | 42.4% | 32.4% |
| Time to Breakeven | 118 days | 427 days |
| 2020 COVID-19 Crash | ||
| % Loss | -43.4% | -33.7% |
| % Gain to Breakeven | 76.6% | 50.9% |
| Time to Breakeven | 85 days | 140 days |
| Q4 2018 Fed Policy Error / Growth Scare | ||
| % Loss | -30.6% | -19.2% |
| % Gain to Breakeven | 44.0% | 23.8% |
| Time to Breakeven | 58 days | 105 days |
| 2015-2016 China Devaluation / Global Growth Scare | ||
| % Loss | -26.7% | -12.2% |
| % Gain to Breakeven | 36.4% | 13.9% |
| Time to Breakeven | 154 days | 62 days |
| 2011 US Debt Ceiling Crisis & European Contagion | ||
| % Loss | -36.9% | -17.9% |
| % Gain to Breakeven | 58.5% | 21.8% |
| Time to Breakeven | 57 days | 123 days |
| 2010 Eurozone Sovereign Debt Crisis / Flash Crash | ||
| % Loss | -29.7% | -15.4% |
| % Gain to Breakeven | 42.3% | 18.2% |
| Time to Breakeven | 4051 days | 125 days |
| 2008-2009 Global Financial Crisis | ||
| % Loss | -75.8% | -53.4% |
| % Gain to Breakeven | 314.0% | 114.4% |
| Time to Breakeven | 384 days | 1085 days |
| Summer 2007 Credit Crunch | ||
| % Loss | -30.6% | -8.6% |
| % Gain to Breakeven | 44.1% | 9.5% |
| Time to Breakeven | 32 days | 47 days |
In The Past
Rambus's stock fell -35.3% during the 2025 US Tariff Shock. Such a loss loss requires a 54.6% gain to breakeven.
Preserve Wealth
Limiting losses and compounding gains is essential to preserving wealth.
Asset Allocation
Actively managed asset allocation strategies protect wealth. Learn more.
About Rambus (RMBS)
AI Analysis | Feedback
Here are 1-2 brief analogies for Rambus (RMBS):
- They're essentially the ARM Holdings of high-speed computer memory – providing the core technology and chips that make data move fast and securely.
- Imagine a highly specialized Texas Instruments or Analog Devices, but solely dedicated to designing the crucial interface chips and intellectual property that power high-speed, secure computer memory.
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- DDR Memory Interface Chips: Rambus offers DDR5, DDR4, and DDR3 memory interface chips to module manufacturers and OEMs.
- Silicon IP Solutions: The company provides interface and security IP solutions that move and protect data in advanced applications.
- Physical Interface and Digital Controller IP: Rambus offers physical interface and digital controller IP for integrated memory and interconnect subsystems.
- Patent Portfolio: Rambus holds a portfolio of patents covering memory architecture, high-speed serial links, and security products, which it licenses.
AI Analysis | Feedback
Rambus (RMBS) primarily sells its semiconductor products, IP solutions, and patent licenses to other companies.
Based on the provided company description, its major customer categories include:
- Module manufacturers: These companies integrate Rambus's DDR memory interface chips (such as DDR5, DDR4, and DDR3) into memory modules.
- Original Equipment Manufacturers (OEMs): These companies incorporate Rambus's DDR memory interface chips into their own systems and products.
- Semiconductor companies: These companies license Rambus's silicon IP solutions (including interface and security IP, as well as physical interface and digital controller IP) for integration into advanced applications, and/or license its portfolio of patents covering memory architecture, high-speed serial links, and security products.
The provided background information does not name specific customer companies or their public symbols.
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- Taiwan Semiconductor Manufacturing Company (TSM)
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Luc Seraphin President & CEOMr. Seraphin has over 30 years of experience managing global businesses. Before becoming CEO, he served as Senior Vice President and General Manager of the Memory and Interface Division (October 2015 - June 2018) and Senior Vice President of Worldwide Sales and Operations (June 2014 - October 2015). His career began at NEC in 1985, followed by roles at AT&T Bell Labs, Lucent Technologies, and Agere Systems (now Broadcom Inc.), where he was Executive Vice President and General Manager of the Wireless Business Unit. He also held the position of general manager at a GPS startup company in Switzerland and was Vice President of Worldwide Sales and Support at Sequans Communications.
John Allen Interim CFOMr. Allen joined Rambus in 2023 and leads the global accounting organization, bringing over 40 years of finance experience. Prior to Rambus, he served as senior vice president and corporate controller at Xperi (formerly Tessera), a role that included a period as acting chief financial officer. He also held senior finance leadership positions at Corsair as vice president, corporate controller, and at Leadis Technology, where he was chief financial officer and vice president, corporate controller.
Sean Fan EVP & COOMr. Fan joined Rambus as Chief Operating Officer in August 2019, with a track record of over 20 years in semiconductor operations. Before Rambus, he was a corporate vice president and general manager at Renesas Electronics, leading the datacenter business unit. Prior to Renesas's acquisition of Integrated Device Technology Inc. (IDT) in March 2019, Mr. Fan spent over 19 years at IDT in various senior executive roles, actively participating in corporate strategy, mergers and acquisitions, and leading efforts in business turnaround and transformation. He previously worked at Lucent Microelectronics, Mitel Semiconductor, and the National Lab of Telecom in China.
Simon Blake-Wilson SVP & General Manager of Silicon IPDr. Blake-Wilson joined Rambus in January 2026. He is responsible for the development and growth of the company's silicon IP products, driving high-performance, secured memory and interconnect architectural innovation. Throughout his career, he has focused on driving commercial adoption of advanced technologies, beginning as Director of Research at Certicom, where he spearheaded the adoption of Elliptic Curve Cryptography (ECC).
Rami Sethi SVP & General Manager of Memory Interface ChipsPrior to joining Rambus, Mr. Sethi was Corporate Vice President and General Manager of the Analog and Mixed Signal Business Unit at Renesas Electronics. Before Renesas acquired Integrated Device Technology (IDT) in 2019, he served as Vice President and General Manager of the Memory Interface and Power Management Divisions at IDT starting in 2013. His experience also includes various marketing and engineering roles at IDT, SiTime, and Essential Test Systems.
AI Analysis | Feedback
The key risks to Rambus (RMBS) are primarily related to the inherent volatility and complexities of the semiconductor industry, specifically in its supply chain, competitive landscape, and customer relationships.
- Supply Chain Disruptions: Rambus faces significant risks from disruptions in its global supply chain. The semiconductor industry is characterized by a complex and geographically concentrated supply chain, making it vulnerable to various external factors. Recently, Rambus experienced a manufacturing issue in its backend supply chain during Q4 2025, which negatively impacted its Q1 2026 product revenue guidance and led to a temporary drop in stock price. Broader industry risks such as geopolitical tensions (e.g., U.S.-China trade relations, the role of Taiwan in chip manufacturing), natural disasters, and limited foundry options can also disrupt the availability of critical materials and components, affecting Rambus's production and ability to meet customer demand.
- Intense Industry Competition and Technological Obsolescence: The semiconductor market is highly competitive and rapidly evolving, with short product lifecycles and constant technological advancements. Rambus competes with larger companies that possess greater resources. The company's success relies on its ability to continuously innovate and develop new memory interface chips and silicon IP solutions (like DDR5, HBM4, and PCIe 7) to meet the demands of emerging technologies such as AI and high-performance computing. Failure to keep pace with these advancements or the emergence of alternative technologies could render its products less competitive, impacting revenue and market share.
- Customer Concentration Risks: A notable portion of Rambus Inc.'s revenue is concentrated in a limited number of key customers. The loss of one or more of these major customers, whether due to contract termination, acquisition, or other factors, could lead to a substantial decrease in revenue and financial performance. This reliance on a concentrated customer base increases Rambus's vulnerability to market fluctuations and risks specific to those customers.
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Rambus Inc. operates in several key addressable markets for its semiconductor products and intellectual property (IP) solutions. These include the markets for DDR memory interface chips, as well as broader silicon IP markets encompassing interface and security IP.
Addressable Markets for Rambus's Main Products and Services
DDR Memory Interface Chips
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Global DRAM Market: The global Dynamic Random-Access Memory (DRAM) market is a significant addressable market for Rambus's DDR memory interface chips. This market was valued at approximately USD 121.83 billion in 2025 and is projected to grow to about USD 223.7 billion by 2034, demonstrating a Compound Annual Growth Rate (CAGR) of 7.20% during the forecast period. Another estimate places the global DRAM market size at USD 99.29 billion in 2025, growing to USD 141.81 billion in 2031 with a CAGR of 6.1%. Asia Pacific dominated the global DRAM market with a share of 45.80% in 2025.
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Global Memory Interface Chip Market: More specifically, the global memory interface chip market, which includes DDR, GDDR, HBM, and LPDDR types, was valued at USD 1.37 billion in 2026 and is expected to reach USD 14.03 billion by 2035, with a robust CAGR of 29.5% from 2026 to 2035. Another report indicates a market size of USD 1.33 billion in 2024, growing to USD 1.75 billion in 2025 and exceeding USD 12.66 billion by 2033, with a CAGR of 28.5%.
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Global DDR5 Memory Interface Chip Market: For DDR5, a key focus area for Rambus, the global DDR5 Memory Interface Chip market is projected to be approximately USD 1.64 billion in 2025 and is expected to reach about USD 5.02 billion in 2033, growing at a CAGR of 15.03% from 2025 to 2033. The DDR5 RDIMM memory interface chip market alone is estimated to have a current annual value exceeding USD 5 billion, with a projected CAGR of around 15% for the next five years. Rambus is identified as a key player in the DDR5 Memory Interface Chip market.
Silicon IP (Interface and Security IP Solutions)
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Global Semiconductor IP Market: The broader global semiconductor IP market, which includes various types of IP solutions, was valued at approximately USD 7.5 billion in 2024 and is projected to grow to USD 11.2 billion by 2029, at a CAGR of 8.5%. Another source estimates the market at USD 8.8 billion in 2024, with a projection to reach around USD 35.7 billion by 2034, driven by a CAGR of 15.1% from 2025 to 2034. Asia Pacific held the largest share of this market, at 52.63% in 2025. North America is also a major market, holding approximately 45% of the global market share.
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Global Interface IP Market: Specifically for interface IP, the global market was valued at USD 2.91 billion in 2024 and is expected to reach USD 6.86 billion by 2032, growing at a CAGR of 11.30% during the forecast period. Another report valued the Interface IP Market at USD 1.33 billion in 2025, with an expected increase to USD 2.83 billion by 2032, at a CAGR of 11.4%. North America dominated the interface IP market with over 35% revenue share in 2024.
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Global Security IP Market (IPSec): For security IP, the global IP Security (IPSec) market is projected to reach approximately USD 15 billion by 2032, increasing from USD 5 billion in 2023, with a CAGR of around 12%. In 2024, the global IPSec market size was estimated at USD 2.9 billion. North America is expected to lead this market, with a projected market size of approximately USD 5 billion by 2032.
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Here are 3-5 expected drivers of future revenue growth for Rambus (RMBS) over the next 2-3 years:
- Accelerating DDR5 Adoption and Market Share Expansion: Rambus is experiencing robust growth driven by the increasing adoption of DDR5 memory interface chips, particularly Register Clock Drivers (RCDs), across server and client platforms. The company maintains a leading market share in the DDR5 RCD market and anticipates further gains as the industry transitions from DDR4 to DDR5.
- Surging Demand from AI and Data Centers: The exponential growth of AI workloads, encompassing both training and inference, and the continuous expansion of high-performance computing in data centers are significant long-term revenue drivers. AI architectures are leading to substantially higher DRAM content per server, directly benefiting Rambus's memory interface chip and Silicon IP offerings.
- Launch and Ramp-up of New High-Performance Products and Silicon IP: Rambus is consistently introducing and scaling new products and intellectual property crucial for advanced memory and interconnect solutions. Key examples include High Bandwidth Memory (HBM4), GDDR7, PCIe 7.0, CXL 3.1 solutions, and Multiplexed Registering Dual Inline Memory Modules (MRDIMMs). The initial ramp of MRDIMM in late 2026 is identified as a substantial market opportunity, and these new offerings are critical for addressing the evolving demands of high-speed memory interconnect and security in next-generation computing.
- Growth in Silicon IP Business: Rambus's Silicon IP business, which includes high-speed memory and security IP solutions, is expected to continue its consistent growth trajectory of 10-15% annually. This growth is fueled by the ongoing need for enhanced speed and security for data in advanced data center applications and other computing environments.
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Share Repurchases
- Rambus initiated an accelerated share repurchase (ASR) program of approximately $100 million in June 2021, as part of a broader 20 million share repurchase program authorized in October 2020.
- In August 2023, the company launched another ASR program to repurchase approximately $100 million of its common stock.
- A $50 million ASR program was initiated in March 2024.
Share Issuance
- The issuance of common shares by Rambus Inc. was USD 6.9 million in 2025, marking a 25.5% increase year-over-year.
Outbound Investments
- Rambus's annual net acquisitions/divestitures for 2023 were $0.106 billion.
- In December 2025, the CEO stated the company continued to explore acquisitions and had made several small acquisitions, primarily in the silicon IP sector, over the preceding year.
Capital Expenditures
- Rambus reported capital expenditures of $14 million in 2021, $17 million in 2022, $23 million in 2023, $31 million in 2024, and $27 million in 2025.
- Capital expenditures for the fourth quarter of 2025 were $8.6 million.
- The company's capital expenditures are primarily focused on supporting its core business in semiconductor products and IP, particularly for data centers and AI applications.
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Peer Comparisons
| Peers to compare with: |
Financials
| Median | |
|---|---|
| Name | |
| Mkt Price | 315.23 |
| Mkt Cap | 110.9 |
| Rev LTM | 7,148 |
| Op Inc LTM | 2,226 |
| FCF LTM | 2,028 |
| FCF 3Y Avg | 1,144 |
| CFO LTM | 2,736 |
| CFO 3Y Avg | 2,344 |
Growth & Margins
| Median | |
|---|---|
| Name | |
| Rev Chg LTM | 17.5% |
| Rev Chg 3Y Avg | 2.3% |
| Rev Chg Q | 20.3% |
| QoQ Delta Rev Chg LTM | 4.6% |
| Op Inc Chg LTM | 22.6% |
| Op Inc Chg 3Y Avg | 6.6% |
| Op Mgn LTM | 31.5% |
| Op Mgn 3Y Avg | 28.5% |
| QoQ Delta Op Mgn LTM | 0.9% |
| CFO/Rev LTM | 33.8% |
| CFO/Rev 3Y Avg | 33.6% |
| FCF/Rev LTM | 19.3% |
| FCF/Rev 3Y Avg | 20.2% |
Valuation
| Median | |
|---|---|
| Name | |
| Mkt Cap | 110.9 |
| P/S | 14.7 |
| P/Op Inc | 53.7 |
| P/EBIT | 43.6 |
| P/E | 56.7 |
| P/CFO | 40.6 |
| Total Yield | 2.3% |
| Dividend Yield | 0.2% |
| FCF Yield 3Y Avg | 3.3% |
| D/E | 0.0 |
| Net D/E | -0.0 |
Returns
| Median | |
|---|---|
| Name | |
| 1M Rtn | 2.2% |
| 3M Rtn | 55.8% |
| 6M Rtn | 63.7% |
| 12M Rtn | 134.9% |
| 3Y Rtn | 133.5% |
| 1M Excs Rtn | 1.9% |
| 3M Excs Rtn | 46.2% |
| 6M Excs Rtn | 55.7% |
| 12M Excs Rtn | 108.9% |
| 3Y Excs Rtn | 56.1% |
Price Behavior
| Market Price | $145.31 | |
| Market Cap ($ Bil) | 15.7 | |
| First Trading Date | 05/14/1997 | |
| Distance from 52W High | -14.9% | |
| 50 Days | 200 Days | |
| DMA Price | $124.93 | $103.97 |
| DMA Trend | up | up |
| Distance from DMA | 16.3% | 39.8% |
| 3M | 1YR | |
| Volatility | 94.2% | 74.4% |
| Downside Capture | 323.71 | 308.39 |
| Upside Capture | 400.40 | 340.37 |
| Correlation (SPY) | 49.1% | 52.6% |
| 1M | 2M | 3M | 6M | 1Y | 3Y | |
|---|---|---|---|---|---|---|
| Beta | 5.07 | 4.80 | 3.36 | 3.39 | 3.31 | 2.49 |
| Up Beta | 6.92 | 5.35 | 3.95 | 4.22 | 3.98 | 2.37 |
| Down Beta | -1.40 | 1.97 | 1.65 | 2.28 | 3.09 | 2.22 |
| Up Capture | 632% | 580% | 541% | 661% | 1115% | 6916% |
| Bmk +ve Days | 13 | 28 | 36 | 67 | 141 | 432 |
| Stock +ve Days | 9 | 24 | 34 | 64 | 135 | 379 |
| Down Capture | 615% | 563% | 291% | 242% | 187% | 114% |
| Bmk -ve Days | 7 | 13 | 27 | 57 | 109 | 318 |
| Stock -ve Days | 11 | 17 | 29 | 59 | 113 | 367 |
[1] Upside and downside betas calculated using positive and negative benchmark daily returns respectively
Based On 1-Year Data
| Annualized Return | Annualized Volatility | Sharpe Ratio | Correlation with RMBS | |
|---|---|---|---|---|
| RMBS | 160.1% | 75.7% | 1.59 | - |
| Sector ETF (XLK) | 53.4% | 22.0% | 1.86 | 62.1% |
| Equity (SPY) | 25.3% | 12.1% | 1.57 | 54.5% |
| Gold (GLD) | 27.6% | 26.9% | 0.88 | 18.9% |
| Commodities (DBC) | 36.9% | 19.0% | 1.52 | -2.8% |
| Real Estate (VNQ) | 12.5% | 13.3% | 0.63 | 20.6% |
| Bitcoin (BTCUSD) | -39.7% | 42.2% | -1.08 | 29.6% |
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Based On 5-Year Data
| Annualized Return | Annualized Volatility | Sharpe Ratio | Correlation with RMBS | |
|---|---|---|---|---|
| RMBS | 50.0% | 55.2% | 0.95 | - |
| Sector ETF (XLK) | 22.1% | 25.1% | 0.78 | 64.5% |
| Equity (SPY) | 13.5% | 17.1% | 0.62 | 56.4% |
| Gold (GLD) | 17.3% | 18.1% | 0.78 | 13.0% |
| Commodities (DBC) | 9.5% | 19.4% | 0.38 | 9.1% |
| Real Estate (VNQ) | 3.2% | 18.8% | 0.07 | 28.0% |
| Bitcoin (BTCUSD) | 12.1% | 54.6% | 0.42 | 23.9% |
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Based On 10-Year Data
| Annualized Return | Annualized Volatility | Sharpe Ratio | Correlation with RMBS | |
|---|---|---|---|---|
| RMBS | 28.7% | 46.2% | 0.72 | - |
| Sector ETF (XLK) | 24.8% | 24.6% | 0.91 | 63.3% |
| Equity (SPY) | 15.3% | 17.9% | 0.73 | 57.6% |
| Gold (GLD) | 13.0% | 16.0% | 0.67 | 10.4% |
| Commodities (DBC) | 7.1% | 18.0% | 0.32 | 15.1% |
| Real Estate (VNQ) | 5.6% | 20.7% | 0.24 | 33.2% |
| Bitcoin (BTCUSD) | 63.9% | 66.9% | 1.03 | 17.8% |
Smart multi-asset allocation framework can stack odds in your favor. Learn How
Earnings Returns History
Updated 6/2/2026| Forward Returns | |||
|---|---|---|---|
| Earnings Date | 1D Returns | 5D Returns | 21D Returns |
| 4/27/2026 | -21.3% | -21.1% | 5.2% |
| 2/2/2026 | -13.4% | -2.5% | -19.1% |
| 10/27/2025 | -8.7% | -6.9% | -18.6% |
| 7/28/2025 | 13.9% | 17.9% | 16.8% |
| 4/28/2025 | -5.6% | -2.9% | 3.8% |
| 2/3/2025 | 6.8% | 11.3% | -10.6% |
| 10/28/2024 | 13.8% | 8.3% | 29.0% |
| 7/29/2024 | -13.0% | -26.0% | -19.3% |
| ... | |||
| SUMMARY STATS | |||
| # Positive | 13 | 13 | 15 |
| # Negative | 11 | 11 | 9 |
| Median Positive | 5.0% | 7.1% | 14.2% |
| Median Negative | -9.4% | -5.8% | -10.6% |
| Max Positive | 13.9% | 21.3% | 41.3% |
| Max Negative | -21.3% | -26.0% | -19.3% |
SEC Filings
Expand for More| Report Date | Filing Date | Filing |
|---|---|---|
| 03/31/2026 | 04/28/2026 | 10-Q |
| 12/31/2025 | 02/18/2026 | 10-K |
| 09/30/2025 | 10/28/2025 | 10-Q |
| 06/30/2025 | 07/29/2025 | 10-Q |
| 03/31/2025 | 04/29/2025 | 10-Q |
| 12/31/2024 | 02/24/2025 | 10-K |
| 09/30/2024 | 10/30/2024 | 10-Q |
| 06/30/2024 | 07/31/2024 | 10-Q |
| 03/31/2024 | 05/02/2024 | 10-Q |
| 12/31/2023 | 02/23/2024 | 10-K |
| 09/30/2023 | 11/03/2023 | 10-Q |
| 06/30/2023 | 08/04/2023 | 10-Q |
| 03/31/2023 | 05/05/2023 | 10-Q |
| 12/31/2022 | 02/24/2023 | 10-K |
| 09/30/2022 | 11/04/2022 | 10-Q |
| 06/30/2022 | 08/05/2022 | 10-Q |
Insider Activity
Updated 6/3/2026| # | Owner | Title | Holding | Action | Filing Date | Price | Shares | Transacted Value | Value of Held Shares | Form |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Sayiner, Necip | Direct | Sell | 6032026 | 170.15 | 5,000 | 850,750 | 3,100,643 | Form | |
| 2 | Higashi, Emiko | Direct | Sell | 6032026 | 160.50 | 10,000 | 1,605,000 | 7,947,800 | Form | |
| 3 | Stang, Eric B | See Footnote | Sell | 6022026 | 146.00 | 5,000 | 730,000 | 2,805,828 | Form | |
| 4 | Higashi, Emiko | Direct | Sell | 5272026 | 157.57 | 5,000 | 787,850 | 9,378,415 | Form | |
| 5 | Fan, Xianzhi Sean | EVP, COO | Direct | Sell | 5262026 | 151.69 | 37,914 | 5,751,226 | 25,538,451 | Form |
RMBS Trade Sentinel
UNDERWEIGHT (Score 3-4)
CONVICTION RATIONALE
The final score is a 4 (UNDERWEIGHT). While Rambus benefits from a powerful secular tailwind in AI-driven data center demand, the investment thesis is critically flawed by an eroding competitive moat. The company's growth is lagging its market, implying share loss, yet it trades at a speculative valuation that prices in market dominance. The risk-reward skew is unfavorable, with significantly more downside from multiple compression than upside from earnings beats. The stock is a 'junk boat' being lifted by a 'rising tide', making it a high-risk, underweight position.
STOCK ARCHETYPE
Type C: Secular CyclicalRambus is primarily driven by the data center memory upgrade cycle (DDR4 to DDR5, then DDR6), which is a classic cyclical investment case. While it is undergoing a strategic transition (Type F), its near-to-medium term performance is inextricably linked to the timing and magnitude of this technology adoption cycle within the broader secular growth of AI.
INVESTMENT THESIS
The primary bull case for Rambus is its successful transition to a product-centric company, capitalizing on the industry-wide shift to DDR5 memory. As AI workloads demand unprecedented memory bandwidth, data centers are forced to upgrade, making Rambus's portfolio of DDR5 Registering Clock Driver (RCD) chips and companion components essential technology. This creates a durable, high-growth revenue stream that is shifting the company's valuation narrative.
- Product revenue grew 15% YoY in Q1 2026, following a 41% YoY growth in FY2025, demonstrating strong adoption.
- Management has guided for ~11% sequential product revenue growth for Q2 2026, indicating continued robust demand.
- The shift to more complex and higher-value DDR5 chips allowed Rambus to grow its market share from ~25% in the DDR4 cycle to a mid-40% share in the DDR5 cycle.
- The underlying Data Center Chip Market is projected to grow at a CAGR of over 15%, providing a strong secular tailwind.
PRIMARY RISK
The single greatest risk is that Rambus's growth is failing to keep pace with its end market, indicating market share loss to aggressive competitors like Montage Technology and Renesas. While Rambus's product revenue growth of 15% is solid in isolation, it significantly lags the Core SAM CAGR of ~29.5%. This suggests that competitors are capturing a disproportionate share of the hypergrowth in the memory interface market, which could lead to future price pressure and multiple compression.
- Rambus's +15% YoY product revenue growth is significantly below the Memory Interface Chip market's CAGR of +29.5%, a mathematical indicator of share loss.
- Montage Technology reported a 61% YoY profit increase in Q1 2026 driven by its own DDR5 RCD chips.
- Renesas is already sampling its 6th-gen DDR5 RCD, indicating the competitive technology cycle is accelerating.
- The negative stock reaction to the Q1 2026 earnings, despite YoY growth, shows high investor sensitivity to any signs of decelerating momentum.
| KPI | Threshold | Rationale |
|---|---|---|
| Product Revenue Growth YoY | > 25% YoY | This is the primary metric for the bull thesis. Growth needs to be at or above the market growth rate (~29%) to prove market share is not eroding. |
| DDR5 RCD Market Share | Hold > 45% | Management has anchored their leadership claim to a mid-40% share. Any confirmed drop below this level would validate the bear case of competitive intrusion from Montage and Renesas. |
| Blended Gross Margin | Stable at ~80% | A decline in gross margin would signal that increased competition is leading to pricing pressure, directly impacting the profitability of the core thesis. |
Market Share Capture vs. Erosion in the DDR5 Cycle
BULL VIEW
Strong product revenue growth (+15% YoY) and leadership in the DDR5 RCD market (mid-40% share) proves the successful pivot to a high-growth, product-centric model.
CORE TENSION
Bulls see a product-led growth story capturing the AI-driven DDR5 upgrade cycle. Bears see a company growing slower than its market, mathematically implying share loss to competitors.
PREVAILING SENTIMENT
The company's +15% YoY product revenue growth significantly underperforms the Memory Interface Chip market's +29.5% CAGR, providing mathematical evidence of market share loss.
BEAR VIEW
Product revenue growth (+15%) critically lags the core market's hypergrowth (+29.5%), proving that aggressive competitors like Montage Technology and Renesas are winning disproportionate share.
| Timeline | Event & Metric To Watch |
|---|---|
Late July 2026 | Q2 2026 Earnings Call Watch: Product Revenue YoY Growth. Watch if it re-accelerates toward the market CAGR of ~29.5%, or continues to lag behind Q1's +15% rate, confirming share loss. |
Late October 2026 | Q3 2026 Earnings & FY27 Guidance Watch: DDR5 RCD market share update. Any commentary suggesting a drop below the anchored 'mid-40%' level would validate the bear thesis of competitive intrusion. |
June & August 2026 | Competitor Announcements at Computex / Flash Memory Summit Watch: Headline of a competitor launching a next-gen memory interface chip (DDR6, CXL 3.x+) with validated performance benchmarks exceeding Rambus's public roadmap. |
Next 1-3 Months | Permanent CFO Announcement Watch: The profile of the incoming CFO. A well-respected industry veteran would be a positive signal, while a prolonged search or an underwhelming hire could increase uncertainty. |
| Date | Event | Stock Impact |
|---|---|---|
Oct 2025 - Apr 2026 | Concentrated Insider Selling Details: Over the past six months, insiders conducted 19 open-market sale transactions with zero purchases, including 9 sales by the CEO, signaling low management conviction. | - |
Oct 27, 2025 | Q3 2025 Earnings Release Details: Company reported a miss on EPS estimates, contributing to forecasting unpredictability and raising concerns about execution heading into a period of supply chain challenges. | Crashed 8.7% $113.61 -> $103.72 |
Nov 28, 2025 | Competitor Renesas Samples 6th-Gen DDR5 RCD Details: Key competitor Renesas began sampling its next-generation 9600 MT/s DDR5 RCD, signaling an accelerating technology cycle and ratcheting up competitive pressure. | Slight -1.4% pullback $95.57 -> $94.19 |
Feb 2, 2026 | Q4 2025 Earnings & Supply Chain Disclosure Details: Disclosed a 'one-time supply chain disruption' that would impact Q1 2026 revenue, which triggered significant investor concern and shareholder investigations. | Plummeted 13.4% $113.71 -> $98.45 |
Feb 10, 2026 | CFO Resignation Details: Company announced the resignation of CFO Desmond Lynch, effective Feb 27, 2026. An interim CFO was appointed while a formal search for a permanent replacement began. | Fell notably by 3.5% $110.92 -> $106.99 |
Apr 27, 2026 | Q1 2026 Earnings Release Details: Missed EPS and revenue forecasts despite 15% YoY product revenue growth to $88.0M. Market reacted negatively to the miss and ongoing supply chain commentary. | Fell notably. Per raw_data_map, stock declined ~10.79% |
Position Sizing
1% - 3%
CONSERVATIVE
Stock is in an Explosive Volatility regime (5.3x S&P) with Spiking near-term fear. The Bearish sentiment, speculative valuation, and eroding moat mandate a conservative sizing to avoid significant drawdowns until fundamentals improve.
Diversification Alternatives
CDNS
SECTORSuperior business model with a wider moat through EDA software integration. Strong IP revenue growth (+22% YoY) contrasts with Rambus's challenges. Less exposed to single product cycle risk.
688008.SS (Montage Technology)
INDUSTRYDirectly winning the race that Rambus is losing. It is a pure-play on the same DDR5 theme but with superior momentum, evidenced by its 61% YoY profit growth in Q1 2026.
Rambus is transforming from a pure patent-licensing entity into a product-centric semiconductor company, with growth now driven by its leadership in high-speed memory interface chips for data centers and AI.
Filter all news through the lens of data center and AI-driven demand for DDR5 memory, which is the primary driver of the high-growth, high-margin product business.
Product revenue growth >15% YoY; explicit market share gains in DDR5 RCD or companion chips cited by Rambus or third parties; design wins for next-generation interfaces like CXL or HBM IP with major data center or AI hardware providers.
Decelerating product revenue growth; loss of DDR5 market share to competitors like Montage or Renesas; delays in the ramp of next-generation server platforms from Intel or AMD; significant negative litigation outcomes impacting the high-margin royalty stream.
Quarterly fluctuations in patent licensing revenue (this is lumpy but stable long-term); minor product announcements for non-data center markets; general semiconductor industry cyclicality news not specific to the high-performance data center memory segment.
Repricing Catalyst
The market is re-rating Rambus based on the accelerating adoption of DDR5 memory in servers, particularly for AI workloads. This shifts the revenue mix toward higher-growth product sales (DDR5 Registering Clock Drivers and companion chips) and away from the slower-growth patent licensing business, driving overall revenue acceleration and margin expansion. Management guidance for 11% sequential product revenue growth in Q2 2026 confirms this momentum.
Memory Interface Chips (Products)
$0.4B TTM (49% of Total) · 62% MarginWhat It Is
DDR5 Registering Clock Driver (RCD) chips, Serial Presence Detect (SPD) hubs, and Power Management ICs (PMICs) which are essential components for server memory modules (RDIMMs).
Who Pays & How
Major memory module manufacturers (e.g., Micron, Samsung, SK Hynix) and server OEMs pay for these chips because they are required to ensure the stability and high performance of DDR5 memory, which is critical for data center and AI applications. The high technical barrier to entry and long qualification cycles create significant switching costs.
Competition
IP & Patent Licensing (Royalties & Contract)
$0.4B TTM (51% of Total) · 90% MarginWhat It Is
Licenses to a large portfolio of patents covering memory interface and security technologies. Silicon IP (pre-designed functional blocks) for high-speed interfaces like HBM, PCIe, and CXL.
Who Pays & How
Nearly all major semiconductor and electronics companies (e.g., Micron, Samsung, NVIDIA) pay royalties to use Rambus's foundational patents in their chip designs to avoid litigation and ensure access to essential technology. Customers license Silicon IP to accelerate their own chip development cycles.
Competition
Industry Resources
| Information Technology Resources |
| TechCrunch |
| Wired |
| CIO |
| MIT Technology Review |
| Gartner Insights |
| Ars Technica |
| Semiconductors Resources |
| EE Times |
| Semiconductor Engineering |
| Semiconductor Digest |
External Quote Links
| Y Finance | Barrons |
| TradingView | Morningstar |
| SeekingAlpha | ValueLine |
| Motley Fool | Robinhood |
| CNBC | Etrade |
| MarketWatch | Unusual Whales |
| YCharts | Perplexity Finance |
| FinViz |
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