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, Q3 2025
Institutional positions in Rambus Inc as of Sep 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
- 513
- +62 vs. Q2 2025
- Shares held
- 98.8M
- +3.82M (+4.0%) vs. Q2 2025
- Total value
- $10.3B
- +$4.21B (+69.3%) vs. Q2 2025
- New holders
- 123
- 169 more added
- Sold out
- 61
- 163 more reduced
8 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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 | 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, Q3 2025
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Renaissance Group LLC | 108,467 | $11.3M | 0.43% | −13,126−10.8% | Reduced |
| Tairen Capital Ltd | 103,073 | $10.7M | 1.16% | +103,073 | New |
| California State Teachers Retirement System | 101,119 | $10.5M | 0.01% | +1,567+1.6% | Added |
| Danske Bank A/S | 101,058 | $10.5M | 0.03% | +71,199+238.5% | Added |
| LPL Financial LLC | 100,601 | $10.5M | 0.00% | +13,418+15.4% | Added |
| Assenagon Asset Management S.A. | 94,654 | $9.86M | 0.01% | −786,908−89.3% | Reduced |
| Bessemer Group Inc | 93,719 | $9.77M | 0.01% | +93,256+20,141.7% | Added |
| Envestnet Asset Management Inc | 93,124 | $9.70M | 0.00% | −6,357−6.4% | Reduced |
| EAM Investors, LLC | 89,201 | $9.14M | 1.05% | +89,201 | New |
| Creative Planning | 86,598 | $9.02M | 0.01% | +16,373+23.3% | Added |
| D. E. Shaw & Co., Inc. | 86,103 | $8.97M | 0.01% | +33,571+63.9% | Added |
| GF Fund Management Co. Ltd. | 85,293 | $8.89M | 0.16% | +85,293 | New |
| Great West Life Assurance Co | 82,243 | $8.55M | 0.01% | −64−0.1% | Reduced |
| Los Angeles Capital Management LLC | 78,032 | $8.13M | 0.03% | −26,114−25.1% | Reduced |
| Two Sigma Investments, LP | 77,890 | $8.12M | 0.01% | −53,763−40.8% | Reduced |
| Royal Bank of Canada | 76,311 | $7.95M | 0.00% | −163,913−68.2% | Reduced |
| New York State Teachers Retirement System | 72,861 | $7.59M | 0.01% | +7,700+11.8% | Added |
| Rakuten Investment Management, Inc. | 52,387 | $7.49M | 0.03% | +52,387 | New |
| Victory Capital Management Inc | 69,497 | $7.24M | 0.00% | +31,668+83.7% | Added |
| Citadel Advisors LLC | 68,703 | $7.16M | 0.01% | −83,701−54.9% | Reduced |
| Thornburg Investment Management Inc | 68,591 | $7.15M | 0.09% | −18,157−20.9% | Reduced |
| SummitTX Capital, L.P. | 67,388 | $7.02M | 0.29% | −201,507−74.9% | Reduced |
| Fred Alger Management, LLC | 67,293 | $7.01M | 0.03% | −26,491−28.2% | Reduced |
| AXA Investment Managers S.A. | 65,678 | $6.84M | 0.02% | +65,678 | New |
| Intech Investment Management LLC | 64,571 | $6.73M | 0.06% | −4,839−7.0% | Reduced |
| Globeflex Capital L P | 63,818 | $6.65M | 1.02% | −1,752−2.7% | Reduced |
| Primecap Management Co | 59,000 | $6.15M | 0.00% | −3,300−5.3% | Reduced |
| Vident Advisory, LLC | 57,087 | $5.95M | 0.06% | −18,419−24.4% | Reduced |
| Baird Financial Group, Inc. | 56,554 | $5.89M | 0.01% | +1,749+3.2% | Added |
| Comerica Bank | 55,890 | $5.82M | 0.02% | −27,869−33.3% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 52,435 | $5.46M | 0.01% | +19,046+57.0% | Added |
| Teachers Retirement System of the State of Kentucky | 49,360 | $5.14M | 0.04% | −4,242−7.9% | Reduced |
| Erste Asset Management GmbH | 50,000 | $5.13M | 0.05% | +50,000 | New |
| Rice Hall James & Associates, LLC | 48,779 | $5.08M | 0.28% | −20,007−29.1% | Reduced |
| Moody Aldrich Partners LLC | 47,803 | $4.98M | 0.94% | −31,347−39.6% | Reduced |
| Amalgamated Bank | 47,224 | $4.92M | 0.04% | +110.0% | Added |
| State of Tennessee, Treasury Department | 44,078 | $4.59M | 0.02% | −2,188−4.7% | Reduced |
| SG Americas Securities, LLC | 43,880 | $4.57M | 0.02% | +35,292+410.9% | Added |
| Aspetuck Financial Management LLC | 42,275 | $4.41M | 3.02% | 00.0% | Unchanged |
| Captrust Financial Advisors | 42,034 | $4.38M | 0.01% | −644−1.5% | Reduced |
| Campbell Newman Asset Management Inc | 41,851 | $4.36M | 0.32% | +188+0.5% | Added |
| Lisanti Capital Growth, LLC | 41,532 | $4.33M | 1.06% | +41,532 | New |
| Two Sigma Advisers, LP | 40,100 | $4.18M | 0.01% | −89,200−69.0% | Reduced |
| Point72 Hong Kong Ltd | 39,524 | $4.12M | 0.19% | +39,524 | New |
| South Dakota Investment Council | 38,813 | $4.04M | 0.08% | +10,200+35.6% | Added |
| Ensign Peak Advisors, Inc | 38,321 | $3.99M | 0.01% | +5,795+17.8% | Added |
| Teacher Retirement System of Texas | 37,036 | $3.86M | 0.02% | +635+1.7% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 36,442 | $3.80M | 0.01% | +6,344+21.1% | Added |
| State of New Jersey Common Pension Fund D | 36,327 | $3.79M | 0.01% | +1,781+5.2% | Added |
| Stephens Inc | 36,142 | $3.77M | 0.05% | +32,612+923.9% | Added |
| American Century Companies Inc | 34,991 | $3.65M | 0.00% | +2,038+6.2% | Added |
| Penserra Capital Management LLC | 34,162 | $3.56M | 0.04% | +27,899+445.5% | Added |
| Yousif Capital Management, LLC | 33,835 | $3.53M | 0.04% | −2,160−6.0% | Reduced |
| Handelsbanken Fonder AB | 33,797 | $3.52M | 0.01% | +4,100+13.8% | Added |
| ProShare Advisors LLC | 32,958 | $3.43M | 0.01% | −6,742−17.0% | Reduced |
| Cerity Partners LLC | 32,783 | $3.42M | 0.01% | +3,613+12.4% | Added |
| Susquehanna Portfolio Strategies, LLC | 32,526 | $3.39M | 0.05% | +32,526 | New |
| Arizona State Retirement System | 31,759 | $3.31M | 0.02% | +419+1.3% | Added |
| B. Metzler seel. Sohn & Co. AG | 31,732 | $3.31M | 0.03% | −14,747−31.7% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 30,134 | $3.14M | 0.03% | +5,777+23.7% | Added |
| Louisiana State Employees Retirement System | 30,000 | $3.13M | 0.05% | −200−0.7% | Reduced |
| Hancock Whitney Corp | 29,835 | $3.11M | 0.06% | +22,368+299.6% | Added |
| Investors Towarzystwo Funduszy Inwestycyjnych Spolka Akcyjna | 29,750 | $3.10M | 1.24% | −3,400−10.3% | Reduced |
| Diversified Trust Co | 29,622 | $3.09M | 0.06% | −1,320−4.3% | Reduced |
| Capital Fund Management S.A. | 29,371 | $3.06M | 0.03% | +3,655+14.2% | Added |
| Ameritas Investment Partners, Inc. | 29,287 | $3.05M | 0.09% | −2,596−8.1% | Reduced |
| Qube Research & Technologies Ltd | 29,117 | $3.03M | 0.00% | −320,156−91.7% | Reduced |
| Meritage Portfolio Management | 28,789 | $3.00M | 0.20% | −13,035−31.2% | Reduced |
| State Board of Administration of Florida Retirement System | 28,610 | $2.98M | 0.01% | −2,513−8.1% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 27,614 | $2.88M | 0.01% | +17+0.1% | Added |
| Nomura Holdings Inc | 27,046 | $2.82M | 0.01% | +27,046 | New |
| AMJ Financial Wealth Management | 26,973 | $2.81M | 0.68% | +26,973 | New |
| Hennion & Walsh Asset Management, Inc. | 26,495 | $2.76M | 0.10% | +5,329+25.2% | Added |
| Linden Thomas Advisory Services, LLC | 26,402 | $2.75M | 0.28% | −156−0.6% | Reduced |
| Natixis Advisors, L.P. | 26,058 | $2.71M | 0.00% | +1,661+6.8% | Added |
| Edgestream Partners, L.P. | 25,685 | $2.68M | 0.08% | +10,809+72.7% | Added |
| State of Michigan Retirement System | 25,600 | $2.67M | 0.01% | −200−0.8% | Reduced |
| TD Asset Management Inc | 25,306 | $2.64M | 0.00% | +20,816+463.6% | Added |
| Azzad Asset Management Inc | 24,825 | $2.59M | 0.26% | +24,825 | New |
| Thrivent Financial for Lutherans | 24,719 | $2.58M | 0.01% | −572−2.3% | Reduced |
| STRS Ohio | 24,600 | $2.56M | 0.01% | −3,000−10.9% | Reduced |
| Northwestern Mutual Investment Management Company, LLC | 23,982 | $2.50M | 0.04% | 00.0% | Unchanged |
| Jackson Creek Investment Advisors LLC | 23,920 | $2.49M | 0.72% | +23,920 | New |
| Cambiar Investors LLC | 23,747 | $2.47M | 0.11% | −5,077−17.6% | Reduced |
| Aurora Investment Counsel | 23,598 | $2.46M | 1.29% | +287+1.2% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 23,197 | $2.42M | 0.01% | −7,160−23.6% | Reduced |
| Wesbanco Bank Inc | 22,809 | $2.38M | 0.07% | −5,175−18.5% | Reduced |
| KLP Kapitalforvaltning AS | 22,400 | $2.33M | 0.01% | +200+0.9% | Added |
| Nissay Asset Management Corp | 22,257 | $2.32M | 0.01% | +22,257 | New |
| New Mexico Educational Retirement Board | 22,100 | $2.30M | 0.07% | 00.0% | Unchanged |
| Moody National Bank Trust Division | 21,975 | $2.29M | 0.19% | +13,069+146.7% | Added |
| JustInvest LLC | 21,819 | $2.27M | 0.02% | +305+1.4% | Added |
| Oregon Public Employees Retirement Fund | 21,716 | $2.26M | 0.03% | −300−1.4% | Reduced |
| Cetera Investment Advisers | 20,863 | $2.17M | 0.00% | −10,804−34.1% | Reduced |
| Stifel Financial Corp | 20,594 | $2.15M | 0.00% | +3,323+19.2% | Added |
| IMC-Chicago, LLC | 20,443 | $2.13M | 0.04% | +20,443 | New |
| Epoch Investment Partners, Inc. | 20,164 | $2.10M | 0.01% | +1,875+10.3% | Added |
| Pathstone Holdings, LLC | 20,005 | $2.08M | 0.01% | +1,775+9.7% | Added |
| Quantinno Capital Management LP | 19,972 | $2.08M | 0.01% | +3,445+20.8% | Added |
| Mariner, LLC | 19,871 | $2.07M | 0.00% | +1,960+10.9% | Added |