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 |
|---|---|---|---|---|---|
| Great West Life Assurance Co | 67,896 | $9.00M | 0.01% | +5,766+9.3% | Added |
| Susquehanna Portfolio Strategies, LLC | 69,324 | $9.20M | 0.15% | +38,746+126.7% | Added |
| New York State Teachers Retirement System | 71,833 | $9.54M | 0.02% | −1,489−2.0% | Reduced |
| Weiss Asset Management LP | 73,781 | $9.79M | 0.11% | +10,681+16.9% | Added |
| Franklin Resources Inc | 74,031 | $9.83M | 0.00% | −249,333−77.1% | Reduced |
| LPL Financial LLC | 82,343 | $10.9M | 0.00% | −5,621−6.4% | Reduced |
| Jump Financial, LLC | 83,050 | $11.0M | 0.10% | +77,886+1,508.2% | Added |
| Wells Fargo & Company | 83,655 | $11.1M | 0.00% | −41,234−33.0% | Reduced |
| State Board of Administration of Florida Retirement System | 84,930 | $11.3M | 0.02% | +58,347+219.5% | Added |
| Lazard Asset Management LLC | 87,304 | $11.6M | 0.02% | −14,397−14.2% | Reduced |
| Catalyst Funds Management Pty Ltd | 88,800 | $11.8M | 0.66% | +88,800 | New |
| ArrowMark Colorado Holdings LLC | 89,514 | $11.9M | 0.49% | −172,202−65.8% | Reduced |
| Qube Research & Technologies Ltd | 89,539 | $11.9M | 0.01% | +89,539 | New |
| Intech Investment Management LLC | 90,158 | $12.0M | 0.11% | −24,209−21.2% | Reduced |
| DekaBank Deutsche Girozentrale | 154,173 | $12.2M | 0.02% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 94,035 | $12.5M | 0.01% | −47,050−33.3% | Reduced |
| State of Wisconsin Investment Board | 94,192 | $12.5M | 0.03% | −1,176−1.2% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 94,680 | $12.6M | 0.25% | +57,779+156.6% | Added |
| Jane Street Group, LLC | 95,013 | $12.6M | 0.01% | +89,587+1,651.1% | Added |
| Rockefeller Capital Management L.P. | 96,045 | $12.7M | 0.02% | +593+0.6% | Added |
| Nordea Investment Management AB | 104,479 | $13.1M | 0.01% | −3,576−3.3% | Reduced |
| Voya Investment Management LLC | 99,762 | $13.2M | 0.01% | −666,023−87.0% | Reduced |
| Schwartz Investment Counsel Inc | 100,000 | $13.3M | 0.44% | −320,337−76.2% | Reduced |
| Alliancebernstein L.P. | 155,136 | $13.3M | 0.00% | −112,053−41.9% | Reduced |
| Nomura Holdings Inc | 101,062 | $13.4M | 0.06% | +101,062 | New |
| DF Dent & Co Inc | 102,771 | $13.6M | 0.26% | +906+0.9% | Added |
| Vanguard Asset Management, Ltd | 103,541 | $13.7M | 0.01% | +6,352+6.5% | Added |
| Assetmark, Inc | 119,875 | $15.9M | 0.03% | −27,679−18.8% | Reduced |
| Creative Planning | 120,191 | $16.0M | 0.01% | +17,871+17.5% | Added |
| Mutual of America Capital Management LLC | 121,491 | $16.1M | 0.16% | −11,120−8.4% | Reduced |
| WCM Investment Management, LLC | 130,986 | $16.2M | 0.03% | −34,032−20.6% | Reduced |
| California State Teachers Retirement System | 125,421 | $16.6M | 0.02% | +1,226+1.0% | Added |
| Thrivent Financial for Lutherans | 129,787 | $17.2M | 0.03% | −32,270−19.9% | Reduced |
| HighTower Advisors, LLC | 132,484 | $17.6M | 0.02% | −49,112−27.0% | Reduced |
| Advisor Group Holdings, Inc. | 137,170 | $18.2M | 0.02% | −62,556−31.3% | Reduced |
| Emerald Mutual Fund Advisers Trust | 139,275 | $18.5M | 0.65% | −167,973−54.7% | Reduced |
| Retirement Systems of Alabama | 141,345 | $18.8M | 0.06% | +9,373+7.1% | Added |
| Driehaus Capital Management LLC | 144,875 | $19.2M | 0.11% | −29,078−16.7% | Reduced |
| Los Angeles Capital Management LLC | 150,204 | $19.9M | 0.07% | +137,176+1,052.9% | Added |
| Handelsbanken Fonder AB | 150,857 | $20.0M | 0.06% | +33,060+28.1% | Added |
| Legal & General Group Plc | 153,857 | $20.4M | 0.00% | −4,847−3.1% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 154,872 | $20.6M | 0.04% | +20,599+15.3% | Added |
| Tudor Investment Corp Et Al | 157,155 | $20.9M | 0.09% | +157,155 | New |
| Lord, Abbett & Co. LLC | 158,260 | $21.0M | 0.06% | −228,859−59.1% | Reduced |
| Segall Bryant & Hamill, LLC | 160,293 | $21.3M | 0.25% | +2,843+1.8% | Added |
| Russell Investments Group, Ltd. | 162,179 | $21.5M | 0.02% | +32,287+24.9% | Added |
| Van Eck Associates Corp | 167,993 | $22.3M | 0.01% | +22,742+15.7% | Added |
| Royal Bank of Canada | 169,479 | $22.5M | 0.00% | +139,937+473.7% | Added |
| Duquesne Family Office LLCSuperinvestorDuquesne Family Office | 173,000 | $23.0M | 0.53% | +173,000 | New |
| Ranger Investment Management, L.P. | 176,692 | $23.5M | 1.48% | −47,673−21.2% | Reduced |
| Toroso Investments, LLC | 180,833 | $24.0M | 0.06% | +55,528+44.3% | Added |
| William Blair Investment Management, LLC | 200,116 | $26.6M | 0.08% | +200,116 | New |
| Victory Capital Management Inc | 208,063 | $27.6M | 0.02% | +25,064+13.7% | Added |
| Swiss National Bank | 217,000 | $28.8M | 0.02% | +4,000+1.9% | Added |
| BNP Paribas Arbitrage, SA | 220,814 | $29.3M | 0.02% | −43,584−16.5% | Reduced |
| Two Sigma Investments, LP | 222,921 | $29.6M | 0.02% | +145,511+188.0% | Added |
| California Public Employees Retirement System | 230,004 | $30.5M | 0.02% | +2,733+1.2% | Added |
| Mackenzie Financial Corp | 242,194 | $32.1M | 0.03% | +188,505+351.1% | Added |
| Emerald Advisers, LLC | 252,693 | $33.5M | 0.79% | −240,543−48.8% | Reduced |
| Allianz Asset Management GmbH | 254,879 | $33.8M | 0.03% | +165,773+186.0% | Added |
| Gilder Gagnon Howe & Co LLC | 257,434 | $34.2M | 0.35% | +257,434 | New |
| First Trust Advisors LP | 258,308 | $34.3M | 0.02% | −48,936−15.9% | Reduced |
| Westwood Holdings Group Inc. | 260,065 | $34.5M | 0.26% | −109,085−29.6% | Reduced |
| SEI Investments Co | 261,830 | $34.8M | 0.03% | −78,101−23.0% | Reduced |
| TimesSquare Capital Management, LLC | 267,705 | $35.5M | 0.52% | −44,655−14.3% | Reduced |
| Nomura Asset Management International Inc. | 271,982 | $36.1M | 0.05% | −54,956−16.8% | Reduced |
| Caisse de Depot Et Placement du Quebec | 282,580 | $37.5M | 0.05% | −166,015−37.0% | Reduced |
| Jupiter Topco LLC | 288,553 | $38.3M | 0.02% | +288,553 | New |
| UBS Asset Management Americas Inc | 289,022 | $38.4M | 0.01% | +48,416+20.1% | Added |
| Shannon River Fund Management LLC | 291,713 | $38.7M | 3.46% | −42,104−12.6% | Reduced |
| Rhumbline Advisers | 296,916 | $39.4M | 0.03% | −22,664−7.1% | Reduced |
| Champlain Investment Partners, LLC | 299,368 | $39.7M | 1.02% | −57,855−16.2% | Reduced |
| Nykredit A/S | 320,040 | $42.5M | 0.16% | +320,040 | New |
| Ameriprise Financial Inc | 321,195 | $42.6M | 0.01% | −654,014−67.1% | Reduced |
| Canada Pension Plan Investment Board | 330,648 | $43.9M | 0.02% | +131,200+65.8% | Added |
| Maple Rock Capital Partners Inc. | 342,600 | $45.5M | 0.89% | +342,600 | New |
| UBS Group AG | 373,590 | $49.6M | 0.01% | −582,797−60.9% | Reduced |
| Westfield Capital Management Co LP | 385,811 | $51.2M | 0.17% | +371,375+2,572.6% | Added |
| Citadel Advisors LLC | 400,151 | $53.1M | 0.03% | +383,656+2,325.9% | Added |
| Stephens Investment Management Group LLC | 409,436 | $54.3M | 0.58% | +1,653+0.4% | Added |
| Wellington Management Group LLP | 418,533 | $55.6M | 0.01% | −438,065−51.1% | Reduced |
| HRT Financial LP | 423,352 | $56.2M | 0.10% | +423,352 | New |
| Principal Financial Group Inc | 429,951 | $57.1M | 0.03% | +56,415+15.1% | Added |
| Loomis Sayles & Co L P | 470,934 | $62.5M | 0.08% | −188,901−28.6% | Reduced |
| Millennium Management LLC | 472,818 | $62.8M | 0.04% | +331,504+234.6% | Added |
| Nuveen, LLC | 496,422 | $65.9M | 0.02% | −395,915−44.4% | Reduced |
| Oberweis Asset Management Inc | 527,016 | $70.0M | 1.45% | +700+0.1% | Added |
| Citigroup Inc | 532,402 | $70.7M | 0.03% | −475,146−47.2% | Reduced |
| Susquehanna International Group, LLP | 555,935 | $73.8M | 0.07% | +470,111+547.8% | Added |
| Clearbridge Investments, LLC | 589,641 | $78.3M | 0.06% | +6,371+1.1% | Added |
| Raymond James Financial Inc | 603,874 | $80.2M | 0.02% | −187,105−23.7% | Reduced |
| Barclays PLC | 645,970 | $85.7M | 0.03% | −449,731−41.0% | Reduced |
| Vanguard Fiduciary Trust Co | 699,213 | $92.8M | 0.02% | −50,667−6.8% | Reduced |
| Fisher Asset Management, LLC | 705,847 | $93.7M | 0.03% | −32,509−4.4% | Reduced |
| D. E. Shaw & Co., Inc. | 739,701 | $98.2M | 0.06% | +726,896+5,676.7% | Added |
| PointState Capital LP | 764,172 | $101.4M | 1.79% | +62,865+9.0% | Added |
| Congress Asset Management Co | 777,993 | $103.3M | 0.64% | −497,985−39.0% | Reduced |
| Manufacturers Life Insurance Company, The | 797,195 | $105.8M | 0.08% | +694,792+678.5% | Added |
| Bank of New York Mellon Corp | 828,233 | $109.9M | 0.02% | +48,355+6.2% | Added |
| Northern Trust Corp | 949,113 | $126.0M | 0.01% | −384,982−28.9% | Reduced |