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; 620 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 2025
Institutional positions in Rambus Inc as of Jun 30, 2025. 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
- 459
- +49 vs. Q1 2025
- Shares held
- 97.1M
- +715.5K (+0.7%) vs. Q1 2025
- Total value
- $6.22B
- +$1.23B (+24.5%) vs. Q1 2025
- New holders
- 88
- 191 more added
- Sold out
- 39
- 131 more reduced
3 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: 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 | 620 | $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 2025
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Royal Bank of Canada | 240,224 | $15.4M | 0.00% | +38,502+19.1% | Added |
| Ameriprise Financial Inc | 251,918 | $16.1M | 0.00% | −28,147−10.1% | Reduced |
| Macquarie Group Ltd | 256,093 | $16.4M | 0.02% | +613+0.2% | Added |
| Segall Bryant & Hamill, LLC | 262,577 | $16.8M | 0.24% | −23,185−8.1% | Reduced |
| Prudential Financial Inc | 263,371 | $16.9M | 0.02% | +6,115+2.4% | Added |
| SummitTX Capital, L.P. | 268,895 | $17.2M | 0.76% | +40,731+17.9% | Added |
| Alliancebernstein L.P. | 270,871 | $17.3M | 0.01% | +43,073+18.9% | Added |
| Osterweis Capital Management Inc | 284,410 | $18.2M | 0.87% | −1,895−0.7% | Reduced |
| Penn Capital Management Co Inc | 286,263 | $18.4M | 1.59% | +39,434+16.0% | Added |
| Glenmede Investment Management, LP | 297,440 | $19.0M | 0.10% | +297,440 | New |
| T. Rowe Price Investment Management, Inc. | 312,952 | $20.0M | 0.01% | +312,952 | New |
| Barclays PLC | 316,067 | $20.2M | 0.01% | +135,632+75.2% | Added |
| Lord, Abbett & Co. LLC | 318,322 | $20.4M | 0.07% | −23,664−6.9% | Reduced |
| FMR LLC | 338,261 | $21.7M | 0.00% | +295,693+694.6% | Added |
| Qube Research & Technologies Ltd | 349,273 | $22.4M | 0.03% | +104,385+42.6% | Added |
| Rhumbline Advisers | 352,028 | $22.5M | 0.02% | +18,959+5.7% | Added |
| Schwartz Investment Counsel Inc | 380,337 | $24.3M | 0.80% | 00.0% | Unchanged |
| MetLife Investment Management | 390,442 | $25.0M | 0.15% | +29,807+8.3% | Added |
| SEI Investments Co | 407,356 | $26.1M | 0.03% | +70,131+20.8% | Added |
| Emerald Mutual Fund Advisers Trust | 416,122 | $26.6M | 1.62% | +110,016+35.9% | Added |
| WCM Investment Management, LLC | 416,901 | $26.7M | 0.06% | +28,246+7.3% | Added |
| Millennium Management LLC | 418,512 | $26.8M | 0.02% | +182,417+77.3% | Added |
| UBS Asset Management Americas Inc | 422,805 | $27.1M | 0.01% | +113,293+36.6% | Added |
| Franklin Resources Inc | 427,949 | $27.4M | 0.01% | +53,569+14.3% | Added |
| Panagora Asset Management Inc | 477,359 | $30.6M | 0.14% | +16,921+3.7% | Added |
| Silvercrest Asset Management Group LLC | 480,448 | $30.8M | 0.21% | −33,480−6.5% | Reduced |
| Oberweis Asset Management Inc | 505,780 | $32.4M | 1.41% | −1,570−0.3% | Reduced |
| Principal Financial Group Inc | 516,023 | $33.0M | 0.02% | +9,310+1.8% | Added |
| Bank of America Corp | 523,889 | $33.5M | 0.00% | +127,172+32.1% | Added |
| Goldman Sachs Group Inc | 659,609 | $42.2M | 0.01% | −13,369−2.0% | Reduced |
| Park West Asset Management LLC | 660,000 | $42.3M | 3.22% | +70,850+12.0% | Added |
| AQR Capital Management LLC | 701,746 | $44.9M | 0.04% | +462,116+192.8% | Added |
| Emerald Advisers, LLC | 710,123 | $45.5M | 1.67% | +179,421+33.8% | Added |
| Analog Century Management LP | 827,102 | $53.0M | 3.10% | +146,989+21.6% | Added |
| Assenagon Asset Management S.A. | 881,562 | $56.4M | 0.09% | +702,704+392.9% | Added |
| Hood River Capital Management LLC | 955,600 | $61.2M | 0.85% | +10,706+1.1% | Added |
| Westfield Capital Management Co LP | 962,419 | $61.6M | 0.26% | −126,662−11.6% | Reduced |
| Nuveen, LLC | 1,135,670 | $72.7M | 0.02% | +33,121+3.0% | Added |
| Morgan Stanley | 1,163,259 | $74.5M | 0.00% | +225,227+24.0% | Added |
| Voya Investment Management LLC | 1,199,373 | $76.8M | 0.08% | +90,258+8.1% | Added |
| Wellington Management Group LLP | 1,206,766 | $77.3M | 0.01% | +12,720+1.1% | Added |
| Congress Asset Management Co | 1,276,926 | $81.7M | 0.56% | +77,362+6.4% | Added |
| Charles Schwab Investment Management Inc | 1,287,035 | $82.4M | 0.01% | +30,689+2.4% | Added |
| Neuberger Berman Group LLC | 1,348,038 | $86.3M | 0.07% | +65,870+5.1% | Added |
| Raymond James Financial Inc | 1,372,109 | $87.8M | 0.03% | +432,397+46.0% | Added |
| Northern Trust Corp | 1,393,686 | $89.2M | 0.01% | −26,927−1.9% | Reduced |
| Swedbank AB | 1,700,000 | $108.8M | 0.12% | +1,700,000 | New |
| Westwood Holdings Group Inc. | 1,737,062 | $111.2M | 0.80% | +504,852+41.0% | Added |
| Dimensional Fund Advisors LP | 1,917,673 | $122.8M | 0.03% | +49,239+2.6% | Added |
| Norges Bank | 1,972,325 | $126.3M | 0.02% | −37,401−1.9% | Reduced |
| Bank of New York Mellon Corp | 2,019,504 | $129.3M | 0.02% | +235,253+13.2% | Added |
| Invesco Ltd. | 2,322,124 | $148.7M | 0.03% | −2,209,902−48.8% | Reduced |
| Geode Capital Management, LLC | 2,687,691 | $172.1M | 0.01% | +35,744+1.3% | Added |
| EdgePoint Investment Group Inc. | 2,787,327 | $178.4M | 1.35% | +1,618,133+138.4% | Added |
| JPMorgan Chase & Co | 3,180,376 | $203.6M | 0.01% | −467,030−12.8% | Reduced |
| State Street Corp | 4,508,997 | $288.7M | 0.01% | −71,560−1.6% | Reduced |
| Price T Rowe Associates Inc | 4,693,390 | $300.5M | 0.03% | −4,053,466−46.3% | Reduced |
| Vanguard Group Inc | 12,560,825 | $804.1M | 0.01% | +118,413+1.0% | Added |
| BlackRock, Inc. | 15,000,080 | $960.3M | 0.02% | +763,514+5.4% | Added |
| Vaughan Nelson Investment Management, L.P. | 0 | $0 | 0.00% | −562,813−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −203,645−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −169,347−100.0% | Sold out |
| Ellsworth Advisors, LLC | 0 | $0 | 0.00% | −74,709−100.0% | Sold out |
| Barington Capital Group, L.P. | 0 | $0 | 0.00% | −55,000−100.0% | Sold out |
| Lisanti Capital Growth, LLC | 0 | $0 | 0.00% | −51,925−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −38,249−100.0% | Sold out |
| Westpac Banking Corp | 0 | $0 | 0.00% | −26,843−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −22,900−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −16,810−100.0% | Sold out |
| Twin Tree Management, LP | 0 | $0 | 0.00% | −16,172−100.0% | Sold out |
| Legato Capital Management LLC | 0 | $0 | 0.00% | −11,575−100.0% | Sold out |
| K2 Principal Fund, L.P. | 0 | $0 | 0.00% | −11,520−100.0% | Sold out |
| Pinebridge Investments, L.P. | 0 | $0 | 0.00% | −10,601−100.0% | Sold out |
| Ieq Capital, LLC | 0 | $0 | 0.00% | −10,485−100.0% | Sold out |
| Unique Wealth Strategies, LLC | 0 | $0 | 0.00% | −9,717−100.0% | Sold out |
| United Services Automobile Association | 0 | $0 | 0.00% | −7,171−100.0% | Sold out |
| Equitable Trust Co | 0 | $0 | 0.00% | −6,870−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −6,558−100.0% | Sold out |
| Oppenheimer Asset Management Inc. | 0 | $0 | 0.00% | −5,762−100.0% | Sold out |
| Summit Global Investments | 0 | $0 | 0.00% | −5,005−100.0% | Sold out |
| Fiduciary Financial Group, LLC | 0 | $0 | 0.00% | −5,498−100.0% | Sold out |
| Allianz Asset Management GmbH | 0 | $0 | 0.00% | −4,700−100.0% | Sold out |
| Snowden Capital Advisors LLC | 0 | $0 | 0.00% | −4,341−100.0% | Sold out |
| Ontario Teachers Pension Plan Board | 0 | $0 | 0.00% | −4,135−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −4,028−100.0% | Sold out |
| Headlands Technologies LLC | 0 | $0 | 0.00% | −2,160−100.0% | Sold out |
| Harvest Fund Management Co., Ltd | 0 | $0 | 0.00% | −2,003−100.0% | Sold out |
| McIlrath & Eck, LLC | 0 | $0 | 0.00% | −804−100.0% | Sold out |
| V-Square Quantitative Management LLC | 0 | $0 | 0.00% | −508−100.0% | Sold out |
| Eq Wealth Advisors, LLC | 0 | $0 | 0.00% | −285−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −223−100.0% | Sold out |
| Mather Group, LLC. | 0 | $0 | 0.00% | −113−100.0% | Sold out |
| Cape Investment Advisory, Inc. | 0 | $0 | 0.00% | −88−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −30−100.0% | Sold out |
| TD Private Client Wealth LLC | 0 | $0 | 0.00% | −16−100.0% | Sold out |
| Global Financial Private Client, LLC | 0 | $0 | 0.00% | −9−100.0% | Sold out |
| TD Capital Management LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Highline Wealth Partners LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Glenmede Trust Co NA | – | – | – | – | Not filed |
| Lindbrook Capital, LLC | – | – | – | – | Not filed |