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 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
- 620
- +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
- 189 more added
- Sold out
- 66
- 229 more reduced
8 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 | 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 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 |
|---|---|---|---|---|---|
| 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 |
| Swedbank AB | 1,646,500 | $218.6M | 0.19% | +83,500+5.3% | Added |
| Norges Bank | 1,532,622 | $203.4M | 0.02% | +1,532,622 | New |
| Morgan Stanley | 1,444,281 | $191.7M | 0.01% | +231,084+19.0% | Added |
| Neuberger Berman Group LLC | 1,311,777 | $173.4M | 0.12% | +9,608+0.7% | Added |
| Bank of America Corp | 1,218,726 | $161.8M | 0.01% | −142,844−10.5% | Reduced |
| AQR Capital Management LLC | 1,211,009 | $152.5M | 0.05% | −39,447−3.2% | Reduced |
| Charles Schwab Investment Management Inc | 1,109,132 | $147.2M | 0.02% | −217,270−16.4% | Reduced |
| EdgePoint Investment Group Inc. | 1,086,213 | $144.2M | 1.09% | −861,529−44.2% | Reduced |
| Rafferty Asset Management, LLC | 984,388 | $130.7M | 0.30% | +238,869+32.0% | Added |
| Goldman Sachs Group Inc | 960,878 | $127.5M | 0.01% | +38,773+4.2% | Added |
| Bessemer Group Inc | 958,929 | $127.3M | 0.18% | −80,976−7.8% | Reduced |
| Northern Trust Corp | 949,113 | $126.0M | 0.01% | −384,982−28.9% | Reduced |
| Bank of New York Mellon Corp | 828,233 | $109.9M | 0.02% | +48,355+6.2% | Added |
| Manufacturers Life Insurance Company, The | 797,195 | $105.8M | 0.08% | +694,792+678.5% | Added |
| Congress Asset Management Co | 777,993 | $103.3M | 0.64% | −497,985−39.0% | Reduced |
| PointState Capital LP | 764,172 | $101.4M | 1.79% | +62,865+9.0% | Added |
| D. E. Shaw & Co., Inc. | 739,701 | $98.2M | 0.06% | +726,896+5,676.7% | Added |
| Fisher Asset Management, LLC | 705,847 | $93.7M | 0.03% | −32,509−4.4% | Reduced |
| Vanguard Fiduciary Trust Co | 699,213 | $92.8M | 0.02% | −50,667−6.8% | Reduced |
| Barclays PLC | 645,970 | $85.7M | 0.03% | −449,731−41.0% | Reduced |
| Raymond James Financial Inc | 603,874 | $80.2M | 0.02% | −187,105−23.7% | Reduced |
| Clearbridge Investments, LLC | 589,641 | $78.3M | 0.06% | +6,371+1.1% | Added |
| Susquehanna International Group, LLP | 555,935 | $73.8M | 0.07% | +470,111+547.8% | Added |
| Citigroup Inc | 532,402 | $70.7M | 0.03% | −475,146−47.2% | Reduced |
| Oberweis Asset Management Inc | 527,016 | $70.0M | 1.45% | +700+0.1% | Added |
| Nuveen, LLC | 496,422 | $65.9M | 0.02% | −395,915−44.4% | Reduced |
| Millennium Management LLC | 472,818 | $62.8M | 0.04% | +331,504+234.6% | Added |
| Loomis Sayles & Co L P | 470,934 | $62.5M | 0.08% | −188,901−28.6% | Reduced |
| Principal Financial Group Inc | 429,951 | $57.1M | 0.03% | +56,415+15.1% | Added |
| HRT Financial LP | 423,352 | $56.2M | 0.10% | +423,352 | New |
| Wellington Management Group LLP | 418,533 | $55.6M | 0.01% | −438,065−51.1% | Reduced |
| Stephens Investment Management Group LLC | 409,436 | $54.3M | 0.58% | +1,653+0.4% | Added |
| Citadel Advisors LLC | 400,151 | $53.1M | 0.03% | +383,656+2,325.9% | Added |
| Westfield Capital Management Co LP | 385,811 | $51.2M | 0.17% | +371,375+2,572.6% | Added |
| UBS Group AG | 373,590 | $49.6M | 0.01% | −582,797−60.9% | Reduced |
| Maple Rock Capital Partners Inc. | 342,600 | $45.5M | 0.89% | +342,600 | New |
| Canada Pension Plan Investment Board | 330,648 | $43.9M | 0.02% | +131,200+65.8% | Added |
| Ameriprise Financial Inc | 321,195 | $42.6M | 0.01% | −654,014−67.1% | Reduced |
| Nykredit A/S | 320,040 | $42.5M | 0.16% | +320,040 | New |
| Champlain Investment Partners, LLC | 299,368 | $39.7M | 1.02% | −57,855−16.2% | Reduced |
| Rhumbline Advisers | 296,916 | $39.4M | 0.03% | −22,664−7.1% | Reduced |
| Shannon River Fund Management LLC | 291,713 | $38.7M | 3.46% | −42,104−12.6% | Reduced |
| UBS Asset Management Americas Inc | 289,022 | $38.4M | 0.01% | +48,416+20.1% | Added |
| Jupiter Topco LLC | 288,553 | $38.3M | 0.02% | +288,553 | New |
| Caisse de Depot Et Placement du Quebec | 282,580 | $37.5M | 0.05% | −166,015−37.0% | Reduced |
| Nomura Asset Management International Inc. | 271,982 | $36.1M | 0.05% | −54,956−16.8% | Reduced |
| TimesSquare Capital Management, LLC | 267,705 | $35.5M | 0.52% | −44,655−14.3% | Reduced |
| SEI Investments Co | 261,830 | $34.8M | 0.03% | −78,101−23.0% | Reduced |
| Westwood Holdings Group Inc. | 260,065 | $34.5M | 0.26% | −109,085−29.6% | Reduced |
| First Trust Advisors LP | 258,308 | $34.3M | 0.02% | −48,936−15.9% | Reduced |
| Gilder Gagnon Howe & Co LLC | 257,434 | $34.2M | 0.35% | +257,434 | New |
| Allianz Asset Management GmbH | 254,879 | $33.8M | 0.03% | +165,773+186.0% | Added |
| Emerald Advisers, LLC | 252,693 | $33.5M | 0.79% | −240,543−48.8% | Reduced |
| Mackenzie Financial Corp | 242,194 | $32.1M | 0.03% | +188,505+351.1% | Added |
| California Public Employees Retirement System | 230,004 | $30.5M | 0.02% | +2,733+1.2% | Added |
| Two Sigma Investments, LP | 222,921 | $29.6M | 0.02% | +145,511+188.0% | Added |
| BNP Paribas Arbitrage, SA | 220,814 | $29.3M | 0.02% | −43,584−16.5% | Reduced |
| Swiss National Bank | 217,000 | $28.8M | 0.02% | +4,000+1.9% | Added |
| Victory Capital Management Inc | 208,063 | $27.6M | 0.02% | +25,064+13.7% | Added |
| William Blair Investment Management, LLC | 200,116 | $26.6M | 0.08% | +200,116 | New |
| Toroso Investments, LLC | 180,833 | $24.0M | 0.06% | +55,528+44.3% | Added |
| Ranger Investment Management, L.P. | 176,692 | $23.5M | 1.48% | −47,673−21.2% | Reduced |
| Duquesne Family Office LLCSuperinvestorDuquesne Family Office | 173,000 | $23.0M | 0.53% | +173,000 | New |
| Royal Bank of Canada | 169,479 | $22.5M | 0.00% | +139,937+473.7% | Added |
| Van Eck Associates Corp | 167,993 | $22.3M | 0.01% | +22,742+15.7% | Added |
| Russell Investments Group, Ltd. | 162,179 | $21.5M | 0.02% | +32,287+24.9% | Added |
| Segall Bryant & Hamill, LLC | 160,293 | $21.3M | 0.25% | +2,843+1.8% | Added |
| Lord, Abbett & Co. LLC | 158,260 | $21.0M | 0.06% | −228,859−59.1% | Reduced |
| Tudor Investment Corp Et Al | 157,155 | $20.9M | 0.09% | +157,155 | New |
| Mirae Asset Global Investments Co., Ltd. | 154,872 | $20.6M | 0.04% | +20,599+15.3% | Added |
| Legal & General Group Plc | 153,857 | $20.4M | 0.00% | −4,847−3.1% | Reduced |
| Handelsbanken Fonder AB | 150,857 | $20.0M | 0.06% | +33,060+28.1% | Added |
| Los Angeles Capital Management LLC | 150,204 | $19.9M | 0.07% | +137,176+1,052.9% | Added |
| Driehaus Capital Management LLC | 144,875 | $19.2M | 0.11% | −29,078−16.7% | Reduced |
| Retirement Systems of Alabama | 141,345 | $18.8M | 0.06% | +9,373+7.1% | Added |
| Emerald Mutual Fund Advisers Trust | 139,275 | $18.5M | 0.65% | −167,973−54.7% | Reduced |
| Advisor Group Holdings, Inc. | 137,170 | $18.2M | 0.02% | −62,556−31.3% | Reduced |
| HighTower Advisors, LLC | 132,484 | $17.6M | 0.02% | −49,112−27.0% | Reduced |
| Thrivent Financial for Lutherans | 129,787 | $17.2M | 0.03% | −32,270−19.9% | Reduced |
| California State Teachers Retirement System | 125,421 | $16.6M | 0.02% | +1,226+1.0% | Added |
| WCM Investment Management, LLC | 130,986 | $16.2M | 0.03% | −34,032−20.6% | Reduced |
| Mutual of America Capital Management LLC | 121,491 | $16.1M | 0.16% | −11,120−8.4% | Reduced |
| Creative Planning | 120,191 | $16.0M | 0.01% | +17,871+17.5% | Added |
| Assetmark, Inc | 119,875 | $15.9M | 0.03% | −27,679−18.8% | Reduced |
| Vanguard Asset Management, Ltd | 103,541 | $13.7M | 0.01% | +6,352+6.5% | Added |
| DF Dent & Co Inc | 102,771 | $13.6M | 0.26% | +906+0.9% | Added |
| Nomura Holdings Inc | 101,062 | $13.4M | 0.06% | +101,062 | New |
| Alliancebernstein L.P. | 155,136 | $13.3M | 0.00% | −112,053−41.9% | Reduced |
| Schwartz Investment Counsel Inc | 100,000 | $13.3M | 0.44% | −320,337−76.2% | Reduced |
| Voya Investment Management LLC | 99,762 | $13.2M | 0.01% | −666,023−87.0% | Reduced |