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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15,000,080 | $960.3M | 0.02% | +763,514+5.4% | Added |
| Vanguard Group Inc | 12,560,825 | $804.1M | 0.01% | +118,413+1.0% | Added |
| Price T Rowe Associates Inc | 4,693,390 | $300.5M | 0.03% | −4,053,466−46.3% | Reduced |
| State Street Corp | 4,508,997 | $288.7M | 0.01% | −71,560−1.6% | Reduced |
| JPMorgan Chase & Co | 3,180,376 | $203.6M | 0.01% | −467,030−12.8% | Reduced |
| EdgePoint Investment Group Inc. | 2,787,327 | $178.4M | 1.35% | +1,618,133+138.4% | Added |
| Geode Capital Management, LLC | 2,687,691 | $172.1M | 0.01% | +35,744+1.3% | Added |
| Invesco Ltd. | 2,322,124 | $148.7M | 0.03% | −2,209,902−48.8% | Reduced |
| Bank of New York Mellon Corp | 2,019,504 | $129.3M | 0.02% | +235,253+13.2% | Added |
| Norges Bank | 1,972,325 | $126.3M | 0.02% | −37,401−1.9% | Reduced |
| Dimensional Fund Advisors LP | 1,917,673 | $122.8M | 0.03% | +49,239+2.6% | Added |
| Westwood Holdings Group Inc. | 1,737,062 | $111.2M | 0.80% | +504,852+41.0% | Added |
| Swedbank AB | 1,700,000 | $108.8M | 0.12% | +1,700,000 | New |
| Northern Trust Corp | 1,393,686 | $89.2M | 0.01% | −26,927−1.9% | Reduced |
| Raymond James Financial Inc | 1,372,109 | $87.8M | 0.03% | +432,397+46.0% | Added |
| Neuberger Berman Group LLC | 1,348,038 | $86.3M | 0.07% | +65,870+5.1% | Added |
| Charles Schwab Investment Management Inc | 1,287,035 | $82.4M | 0.01% | +30,689+2.4% | Added |
| Congress Asset Management Co | 1,276,926 | $81.7M | 0.56% | +77,362+6.4% | Added |
| Wellington Management Group LLP | 1,206,766 | $77.3M | 0.01% | +12,720+1.1% | Added |
| Voya Investment Management LLC | 1,199,373 | $76.8M | 0.08% | +90,258+8.1% | Added |
| Morgan Stanley | 1,163,259 | $74.5M | 0.00% | +225,227+24.0% | Added |
| Nuveen, LLC | 1,135,670 | $72.7M | 0.02% | +33,121+3.0% | Added |
| Westfield Capital Management Co LP | 962,419 | $61.6M | 0.26% | −126,662−11.6% | Reduced |
| Hood River Capital Management LLC | 955,600 | $61.2M | 0.85% | +10,706+1.1% | Added |
| Assenagon Asset Management S.A. | 881,562 | $56.4M | 0.09% | +702,704+392.9% | Added |
| Analog Century Management LP | 827,102 | $53.0M | 3.10% | +146,989+21.6% | Added |
| Emerald Advisers, LLC | 710,123 | $45.5M | 1.67% | +179,421+33.8% | Added |
| AQR Capital Management LLC | 701,746 | $44.9M | 0.04% | +462,116+192.8% | Added |
| Park West Asset Management LLC | 660,000 | $42.3M | 3.22% | +70,850+12.0% | Added |
| Goldman Sachs Group Inc | 659,609 | $42.2M | 0.01% | −13,369−2.0% | Reduced |
| Bank of America Corp | 523,889 | $33.5M | 0.00% | +127,172+32.1% | Added |
| Principal Financial Group Inc | 516,023 | $33.0M | 0.02% | +9,310+1.8% | Added |
| Oberweis Asset Management Inc | 505,780 | $32.4M | 1.41% | −1,570−0.3% | Reduced |
| Silvercrest Asset Management Group LLC | 480,448 | $30.8M | 0.21% | −33,480−6.5% | Reduced |
| Panagora Asset Management Inc | 477,359 | $30.6M | 0.14% | +16,921+3.7% | Added |
| Franklin Resources Inc | 427,949 | $27.4M | 0.01% | +53,569+14.3% | Added |
| UBS Asset Management Americas Inc | 422,805 | $27.1M | 0.01% | +113,293+36.6% | Added |
| Millennium Management LLC | 418,512 | $26.8M | 0.02% | +182,417+77.3% | Added |
| WCM Investment Management, LLC | 416,901 | $26.7M | 0.06% | +28,246+7.3% | Added |
| Emerald Mutual Fund Advisers Trust | 416,122 | $26.6M | 1.62% | +110,016+35.9% | Added |
| SEI Investments Co | 407,356 | $26.1M | 0.03% | +70,131+20.8% | Added |
| MetLife Investment Management | 390,442 | $25.0M | 0.15% | +29,807+8.3% | Added |
| Schwartz Investment Counsel Inc | 380,337 | $24.3M | 0.80% | 00.0% | Unchanged |
| Rhumbline Advisers | 352,028 | $22.5M | 0.02% | +18,959+5.7% | Added |
| Qube Research & Technologies Ltd | 349,273 | $22.4M | 0.03% | +104,385+42.6% | Added |
| FMR LLC | 338,261 | $21.7M | 0.00% | +295,693+694.6% | Added |
| Lord, Abbett & Co. LLC | 318,322 | $20.4M | 0.07% | −23,664−6.9% | Reduced |
| Barclays PLC | 316,067 | $20.2M | 0.01% | +135,632+75.2% | Added |
| T. Rowe Price Investment Management, Inc. | 312,952 | $20.0M | 0.01% | +312,952 | New |
| Glenmede Investment Management, LP | 297,440 | $19.0M | 0.10% | +297,440 | New |
| Penn Capital Management Co Inc | 286,263 | $18.4M | 1.59% | +39,434+16.0% | Added |
| Osterweis Capital Management Inc | 284,410 | $18.2M | 0.87% | −1,895−0.7% | Reduced |
| Alliancebernstein L.P. | 270,871 | $17.3M | 0.01% | +43,073+18.9% | Added |
| SummitTX Capital, L.P. | 268,895 | $17.2M | 0.76% | +40,731+17.9% | Added |
| Prudential Financial Inc | 263,371 | $16.9M | 0.02% | +6,115+2.4% | Added |
| Segall Bryant & Hamill, LLC | 262,577 | $16.8M | 0.24% | −23,185−8.1% | Reduced |
| Macquarie Group Ltd | 256,093 | $16.4M | 0.02% | +613+0.2% | Added |
| Ameriprise Financial Inc | 251,918 | $16.1M | 0.00% | −28,147−10.1% | Reduced |
| Royal Bank of Canada | 240,224 | $15.4M | 0.00% | +38,502+19.1% | Added |
| Legal & General Group Plc | 230,197 | $14.7M | 0.00% | +270+0.1% | Added |
| Bridgewater Associates, LP | 226,869 | $14.5M | 0.06% | +148,790+190.6% | Added |
| Loomis Sayles & Co L P | 220,228 | $14.1M | 0.02% | +220,228 | New |
| HighTower Advisors, LLC | 218,320 | $14.0M | 0.02% | +24,776+12.8% | Added |
| Lazard Asset Management LLC | 214,437 | $13.7M | 0.02% | +105,860+97.5% | Added |
| Janus Henderson Group PLC | 213,403 | $13.7M | 0.01% | +23,085+12.1% | Added |
| BNP Paribas Arbitrage, SA | 209,330 | $13.4M | 0.01% | +128,660+159.5% | Added |
| New York State Common Retirement Fund | 207,239 | $13.3M | 0.02% | −145,073−41.2% | Reduced |
| Swiss National Bank | 205,200 | $13.1M | 0.01% | −1,200−0.6% | Reduced |
| Stephens Investment Management Group LLC | 195,123 | $12.5M | 0.16% | +1,462+0.8% | Added |
| Congress Wealth Management LLC | 191,225 | $12.2M | 0.12% | +8,569+4.7% | Added |
| California Public Employees Retirement System | 185,883 | $11.9M | 0.01% | +13,499+7.8% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 174,218 | $11.2M | 0.02% | −8,722−4.8% | Reduced |
| Algert Global LLC | 170,844 | $10.9M | 0.23% | −452−0.3% | Reduced |
| Wells Fargo & Company | 170,639 | $10.9M | 0.00% | +61,297+56.1% | Added |
| DekaBank Deutsche Girozentrale | 154,173 | $10.0M | 0.02% | 00.0% | Unchanged |
| Citadel Advisors LLC | 152,404 | $9.76M | 0.01% | +134,132+734.1% | Added |
| Mutual of America Capital Management LLC | 151,854 | $9.72M | 0.10% | +6,932+4.8% | Added |
| Citigroup Inc | 150,134 | $9.61M | 0.01% | +38,180+34.1% | Added |
| First Trust Advisors LP | 149,330 | $9.56M | 0.01% | +20,601+16.0% | Added |
| Susquehanna International Group, LLP | 143,716 | $9.20M | 0.01% | +12,219+9.3% | Added |
| Canada Pension Plan Investment Board | 141,500 | $9.06M | 0.01% | +800+0.6% | Added |
| Man Group plc | 141,292 | $9.05M | 0.02% | +113,144+402.0% | Added |
| UBS Group AG | 140,441 | $8.99M | 0.00% | +17,765+14.5% | Added |
| Two Sigma Investments, LP | 131,653 | $8.43M | 0.02% | −181,521−58.0% | Reduced |
| Retirement Systems of Alabama | 131,283 | $8.40M | 0.03% | +1,568+1.2% | Added |
| Russell Investments Group, Ltd. | 131,178 | $8.40M | 0.01% | −8,979−6.4% | Reduced |
| Schroder Investment Management Group | 130,621 | $8.36M | 0.01% | +130,621 | New |
| Granahan Investment Management Inc | 130,081 | $8.33M | 0.34% | +1,399+1.1% | Added |
| Two Sigma Advisers, LP | 129,300 | $8.28M | 0.02% | −164,500−56.0% | Reduced |
| Deutsche Bank AG | 127,806 | $8.18M | 0.00% | −65,020−33.7% | Reduced |
| Assetmark, Inc | 125,556 | $8.04M | 0.02% | +11,100+9.7% | Added |
| Renaissance Group LLC | 121,593 | $7.78M | 0.30% | +27,928+29.8% | Added |
| Manufacturers Life Insurance Company, The | 121,209 | $7.76M | 0.01% | −4,844−3.8% | Reduced |
| Castleark Management LLC | 114,700 | $7.34M | 0.22% | −3,400−2.9% | Reduced |
| Van Eck Associates Corp | 113,364 | $7.26M | 0.01% | −14,939−11.6% | Reduced |
| Apis Capital Advisors, LLC | 112,000 | $7.17M | 2.55% | +18,000+19.1% | Added |
| Jane Street Group, LLC | 108,921 | $6.97M | 0.01% | −239,370−68.7% | Reduced |
| Los Angeles Capital Management LLC | 104,146 | $6.67M | 0.02% | +84,509+430.4% | Added |
| Hillsdale Investment Management Inc. | 103,630 | $6.63M | 0.24% | +39,030+60.4% | Added |
| Stanley-Laman Group, Ltd. | 103,312 | $6.61M | 0.98% | +103,312 | New |