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; 621 institutions reported holding it in 13F filings for Q2 2026, worth $13.3B in total; superinvestors Duquesne Family Office and Maverick Capital hold it.
13F holders, Q2 2026
Institutional positions in Rambus Inc as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 621
- +71 vs. Q1 2026
- Shares held
- 100.5M
- −1.86M (−1.8%) vs. Q1 2026
- Total value
- $13.3B
- +$4.50B (+51.2%) vs. Q1 2026
- New holders
- 137
- 190 more added
- Sold out
- 66
- 229 more reduced
7 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting RMBS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 621 | $13.3B |
| Q1 2026 | 557 | $8.83B |
| Q4 2025 | 554 | $9.18B |
| Q3 2025 | 513 | $10.3B |
| Q2 2025 | 459 | $6.22B |
| Q1 2025 | 413 | $5.01B |
| Q4 2024 | 395 | $5.03B |
| Q3 2024 | 376 | $3.94B |
| Q2 2024 | 363 | $5.64B |
| Q1 2024 | 375 | $6.00B |
| Q4 2023 | 400 | $6.62B |
| Q3 2023 | 350 | $5.48B |
| Q2 2023 | 393 | $6.14B |
| Q1 2023 | 337 | $4.81B |
| Q4 2022 | 303 | $3.27B |
| Q3 2022 | 241 | $2.38B |
| Q2 2022 | 253 | $2.07B |
| Q1 2022 | 276 | $2.98B |
| Q4 2021 | 258 | $2.80B |
| Q3 2021 | 236 | $2.07B |
| Q2 2021 | 219 | $2.30B |
| Q1 2021 | 213 | $1.86B |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bessemer Group Inc | 958,929 | $127.3M | 0.18% | −80,976−7.8% | Reduced |
| Goldman Sachs Group Inc | 960,878 | $127.5M | 0.01% | +38,773+4.2% | Added |
| Rafferty Asset Management, LLC | 984,388 | $130.7M | 0.30% | +238,869+32.0% | Added |
| EdgePoint Investment Group Inc. | 1,086,213 | $144.2M | 1.09% | −861,529−44.2% | Reduced |
| Charles Schwab Investment Management Inc | 1,109,132 | $147.2M | 0.02% | −217,270−16.4% | Reduced |
| AQR Capital Management LLC | 1,211,009 | $152.5M | 0.05% | −39,447−3.2% | Reduced |
| Bank of America Corp | 1,218,726 | $161.8M | 0.01% | −142,844−10.5% | Reduced |
| Neuberger Berman Group LLC | 1,311,777 | $173.4M | 0.12% | +9,608+0.7% | Added |
| Morgan Stanley | 1,444,281 | $191.7M | 0.01% | +231,084+19.0% | Added |
| Norges Bank | 1,532,622 | $203.4M | 0.02% | +1,532,622 | New |
| Swedbank AB | 1,646,500 | $218.6M | 0.19% | +83,500+5.3% | Added |
| Dimensional Fund Advisors LP | 1,719,400 | $228.2M | 0.04% | −75,895−4.2% | Reduced |
| JPMorgan Chase & Co | 2,101,418 | $261.0M | 0.02% | +264,918+14.4% | Added |
| Geode Capital Management, LLC | 2,297,660 | $305.1M | 0.02% | −826,835−26.5% | Reduced |
| Price T Rowe Associates Inc | 3,334,512 | $442.6M | 0.04% | −42,177−1.2% | Reduced |
| State Street Corp | 3,915,113 | $519.5M | 0.02% | −458,504−10.5% | Reduced |
| Vanguard Capital Management LLC | 4,874,385 | $647.0M | 0.01% | +46,531+1.0% | Added |
| Vanguard Portfolio Management LLC | 6,068,516 | $805.5M | 0.04% | −575,804−8.7% | Reduced |
| Invesco Ltd. | 6,632,458 | $880.4M | 0.07% | +133,410+2.1% | Added |
| FMR LLC | 10,460,026 | $1.39B | 0.06% | +7,141,577+215.2% | Added |
| BlackRock, Inc. | 13,964,477 | $1.85B | 0.03% | −2,340,829−14.4% | Reduced |
| T. Rowe Price Investment Management, Inc. | 0 | $0 | 0.00% | −2,391,020−100.0% | Sold out |
| Hood River Capital Management LLC | 0 | $0 | 0.00% | −727,494−100.0% | Sold out |
| Steadfast Capital Management LP | 0 | $0 | 0.00% | −153,250−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −120,282−100.0% | Sold out |
| Tairen Capital Ltd | 0 | $0 | 0.00% | −120,000−100.0% | Sold out |
| Osterweis Capital Management Inc | 0 | $0 | 0.00% | −84,930−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −66,862−100.0% | Sold out |
| Munro Partners | 0 | $0 | 0.00% | −64,395−100.0% | Sold out |
| Thornburg Investment Management Inc | 0 | $0 | 0.00% | −58,106−100.0% | Sold out |
| Holocene Advisors, LP | 0 | $0 | 0.00% | −49,604−100.0% | Sold out |
| AI-Squared Management Ltd | 0 | $0 | 0.00% | −49,578−100.0% | Sold out |
| Moody Aldrich Partners LLC | 0 | $0 | 0.00% | −37,335−100.0% | Sold out |
| Future Fund LLC | 0 | $0 | 0.00% | −34,386−100.0% | Sold out |
| South Dakota Investment Council | 0 | $0 | 0.00% | −28,613−100.0% | Sold out |
| Element Squared LLC | 0 | $0 | 0.00% | −23,567−100.0% | Sold out |
| Capstone Capital Management Ltd | 0 | $0 | 0.00% | −23,326−100.0% | Sold out |
| Cookson Peirce & Co Inc | 0 | $0 | 0.00% | −17,328−100.0% | Sold out |
| Wesbanco Bank Inc | 0 | $0 | 0.00% | −14,300−100.0% | Sold out |
| Sunstone Asset Management, L.P. | 0 | $0 | 0.00% | −11,746−100.0% | Sold out |
| Aurora Investment Counsel | 0 | $0 | 0.00% | −10,883−100.0% | Sold out |
| Bailard, Inc. | 0 | $0 | 0.00% | −9,375−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −8,849−100.0% | Sold out |
| Inspire Advisors, LLC | 0 | $0 | 0.00% | −7,383−100.0% | Sold out |
| RSM US Wealth Management LLC | 0 | $0 | 0.00% | −6,578−100.0% | Sold out |
| Monolith Management Ltd | 0 | $0 | 0.00% | −6,200−100.0% | Sold out |
| China Universal Asset Management Co., Ltd. | 0 | $0 | 0.00% | −6,000−100.0% | Sold out |
| Systematic Alpha Investments, LLC | 0 | $0 | 0.00% | −5,300−100.0% | Sold out |
| QVT Financial LP | 0 | $0 | 0.00% | −4,648−100.0% | Sold out |
| Qsemble Capital Management, LP | 0 | $0 | 0.00% | −4,529−100.0% | Sold out |
| Savvy Advisors, Inc. | 0 | $0 | 0.00% | −4,308−100.0% | Sold out |
| Ground Swell Capital, LLC | 0 | $0 | 0.00% | −3,613−100.0% | Sold out |
| Blackstone Group Inc. | 0 | $0 | 0.00% | −3,314−100.0% | Sold out |
| Focused Alpha, LLC | 0 | $0 | 0.00% | −3,269−100.0% | Sold out |
| Bamco Inc | 0 | $0 | 0.00% | −3,111−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −3,051−100.0% | Sold out |
| Chase Investment Counsel Corp | 0 | $0 | 0.00% | −3,018−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −2,995−100.0% | Sold out |
| Abacus Wealth Partners, LLC | 0 | $0 | 0.00% | −2,898−100.0% | Sold out |
| Mirabella Financial Services LLP | 0 | $0 | 0.00% | −2,485−100.0% | Sold out |
| Financiere des Professionnels - Fonds d,investissement inc. | 0 | $0 | 0.00% | −2,299−100.0% | Sold out |
| Stonehage Fleming Financial Services Holdings Ltd | 0 | $0 | 0.00% | −1,634−100.0% | Sold out |
| Byrne Asset Management LLC | 0 | $0 | 0.00% | −1,237−100.0% | Sold out |
| Kemnay Advisory Services Inc. | 0 | $0 | 0.00% | −730−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −665−100.0% | Sold out |
| Bayforest Capital Ltd | 0 | $0 | 0.00% | −632−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −480−100.0% | Sold out |
| Steward Partners Investment Advisory, LLC | 0 | $0 | 0.00% | −411−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −372−100.0% | Sold out |
| University of Texas/Texas Am Investment Managment Co | 0 | $0 | 0.00% | −308−100.0% | Sold out |
| Tradewinds Capital Management, LLC | 0 | $0 | 0.00% | −296−100.0% | Sold out |
| Wall Street Financial Group, Inc. | 0 | $0 | 0.00% | −268−100.0% | Sold out |
| Root Financial Partners, LLC | 0 | $0 | 0.00% | −247−100.0% | Sold out |
| Innovative Asset Advisors Group, LLC | 0 | $0 | 0.00% | −126−100.0% | Sold out |
| Globeflex Capital L P | 0 | $0 | 0.00% | −101−100.0% | Sold out |
| Global Trust Asset Management, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Crews Bank & Trust | 0 | $0 | 0.00% | −59−100.0% | Sold out |
| Legacy Wealth Managment, LLC | 0 | $0 | 0.00% | −56−100.0% | Sold out |
| Raleigh Capital Management Inc. | 0 | $0 | 0.00% | −21−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −19−100.0% | Sold out |
| Central Trust Co | 0 | $0 | 0.00% | −17−100.0% | Sold out |
| Cullen/Frost Bankers, Inc. | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| Operose Advisors LLC | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| Rachor Investment Advisory Services, LLC | 0 | $0 | 0.00% | −9−100.0% | Sold out |
| Vermillion Wealth Management, Inc. | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Intentional Wealth Strategies, LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Curio Wealth, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Janus Henderson Group PLC | – | – | – | – | Not filed |
| Gibbs Wealth Management | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |
| Skopos Labs, Inc. | – | – | – | – | Not filed |
| Journey Strategic Wealth LLC | – | – | – | – | Not filed |
| Sunbelt Securities, Inc. | – | – | – | – | Not filed |
| USA Financial Portformulas Corp | – | – | – | – | Not filed |