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, Q4 2025
Institutional positions in Rambus Inc as of Dec 31, 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
- 554
- +50 vs. Q3 2025
- Shares held
- 99.8M
- +1.42M (+1.4%) vs. Q3 2025
- Total value
- $9.18B
- −$1.08B (−10.5%) vs. Q3 2025
- New holders
- 103
- 190 more added
- Sold out
- 53
- 195 more reduced
9 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| California State Teachers Retirement System | 101,025 | $9.28M | 0.01% | −94−0.1% | Reduced |
| SummitTX Capital, L.P. | 97,372 | $8.95M | 0.27% | +29,984+44.5% | Added |
| Deutsche Bank AG | 97,196 | $8.93M | 0.00% | −28,748−22.8% | Reduced |
| Castleark Management LLC | 95,578 | $8.78M | 0.26% | −15,260−13.8% | Reduced |
| Ranger Investment Management, L.P. | 95,490 | $8.77M | 0.60% | +95,490 | New |
| AMJ Financial Wealth Management | 94,946 | $8.72M | 2.10% | +67,973+252.0% | Added |
| Thrivent Financial for Lutherans | 94,495 | $8.68M | 0.02% | +69,776+282.3% | Added |
| Bessemer Group Inc | 93,728 | $8.61M | 0.01% | +90.0% | Added |
| Creative Planning | 91,313 | $8.39M | 0.01% | +4,715+5.4% | Added |
| Osterweis Capital Management Inc | 89,065 | $8.18M | 0.35% | −62,495−41.2% | Reduced |
| Hillsdale Investment Management Inc. | 88,990 | $8.18M | 0.23% | −23,710−21.0% | Reduced |
| LPL Financial LLC | 84,535 | $7.77M | 0.00% | −16,066−16.0% | Reduced |
| Los Angeles Capital Management LLC | 70,746 | $7.62M | 0.03% | −7,286−9.3% | Reduced |
| Danske Bank A/S | 77,728 | $7.14M | 0.02% | −23,330−23.1% | Reduced |
| New York State Teachers Retirement System | 76,926 | $7.07M | 0.01% | +4,065+5.6% | Added |
| Trexquant Investment LP | 74,943 | $6.89M | 0.06% | +74,943 | New |
| Envestnet Asset Management Inc | 69,387 | $6.38M | 0.00% | −23,737−25.5% | Reduced |
| Fred Alger Management, LLC | 67,203 | $6.18M | 0.02% | −90−0.1% | Reduced |
| Victory Capital Management Inc | 66,985 | $6.16M | 0.00% | −2,512−3.6% | Reduced |
| Vident Advisory, LLC | 66,071 | $6.07M | 0.06% | +8,984+15.7% | Added |
| SG Americas Securities, LLC | 63,652 | $5.85M | 0.01% | +19,772+45.1% | Added |
| Great West Life Assurance Co | 61,971 | $5.69M | 0.01% | −20,272−24.6% | Reduced |
| EAM Investors, LLC | 60,957 | $5.60M | 0.62% | −28,244−31.7% | Reduced |
| Globeflex Capital L P | 59,103 | $5.43M | 0.83% | −4,715−7.4% | Reduced |
| American Century Companies Inc | 58,302 | $5.36M | 0.00% | +23,311+66.6% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 57,799 | $5.31M | 0.01% | +56,699+5,154.5% | Added |
| Thornburg Investment Management Inc | 57,554 | $5.29M | 0.07% | −11,037−16.1% | Reduced |
| Erste Asset Management GmbH | 55,600 | $5.23M | 0.04% | +5,600+11.2% | Added |
| State of Tennessee, Treasury Department | 42,268 | $4.81M | 0.02% | −1,810−4.1% | Reduced |
| M37 Management LP | 50,000 | $4.59M | 3.16% | +50,000 | New |
| Teachers Retirement System of the State of Kentucky | 49,360 | $4.54M | 0.03% | 00.0% | Unchanged |
| Nicholas Investment Partners, LP | 47,803 | $4.39M | 0.32% | +31,173+187.5% | Added |
| Primecap Management Co | 47,500 | $4.36M | 0.00% | −11,500−19.5% | Reduced |
| Two Sigma Advisers, LP | 46,700 | $4.29M | 0.01% | +6,600+16.5% | Added |
| Assenagon Asset Management S.A. | 46,357 | $4.26M | 0.01% | −48,297−51.0% | Reduced |
| Amalgamated Bank | 45,339 | $4.17M | 0.03% | −1,885−4.0% | Reduced |
| Rice Hall James & Associates, LLC | 44,945 | $4.13M | 0.23% | −3,834−7.9% | Reduced |
| Toroso Investments, LLC | 42,502 | $3.91M | 0.02% | +26,168+160.2% | Added |
| New York State Common Retirement Fund | 41,938 | $3.85M | 0.01% | −83,775−66.6% | Reduced |
| Captrust Financial Advisors | 40,876 | $3.76M | 0.01% | −1,158−2.8% | Reduced |
| Pictet Asset Management Holding SA | 40,751 | $3.74M | 0.00% | +25,846+173.4% | Added |
| Campbell Newman Asset Management Inc | 40,346 | $3.71M | 0.27% | −1,505−3.6% | Reduced |
| Yousif Capital Management, LLC | 33,317 | $3.67M | 0.04% | −518−1.5% | Reduced |
| Baird Financial Group, Inc. | 38,441 | $3.53M | 0.01% | −18,113−32.0% | Reduced |
| Aspetuck Financial Management LLC | 38,175 | $3.51M | 2.36% | −4,100−9.7% | Reduced |
| ProShare Advisors LLC | 37,770 | $3.47M | 0.01% | +4,812+14.6% | Added |
| EFG International AG | 37,531 | $3.45M | 0.07% | +37,531 | New |
| State of New Jersey Common Pension Fund D | 36,975 | $3.40M | 0.01% | +648+1.8% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 36,802 | $3.38M | 0.01% | +360+1.0% | Added |
| Moody Aldrich Partners LLC | 36,432 | $3.35M | 0.62% | −11,371−23.8% | Reduced |
| Weiss Asset Management LP | 36,300 | $3.34M | 0.05% | +36,300 | New |
| Royal Bank of Canada | 34,004 | $3.12M | 0.00% | −42,307−55.4% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 32,526 | $2.99M | 0.05% | 00.0% | Unchanged |
| Handelsbanken Fonder AB | 31,797 | $2.92M | 0.01% | −2,000−5.9% | Reduced |
| Comerica Bank | 30,625 | $2.81M | 0.01% | −25,265−45.2% | Reduced |
| Hancock Whitney Corp | 30,528 | $2.81M | 0.05% | +693+2.3% | Added |
| Cerity Partners LLC | 30,476 | $2.80M | 0.00% | −2,307−7.0% | Reduced |
| Point72 Asset Management, L.P. | 30,021 | $2.76M | 0.00% | −136,646−82.0% | Reduced |
| Stephens Inc | 29,936 | $2.75M | 0.03% | −6,206−17.2% | Reduced |
| Louisiana State Employees Retirement System | 29,800 | $2.74M | 0.05% | −200−0.7% | Reduced |
| Arizona State Retirement System | 29,760 | $2.73M | 0.01% | −1,999−6.3% | Reduced |
| Investors Towarzystwo Funduszy Inwestycyjnych Spolka Akcyjna | 29,750 | $2.73M | 1.04% | 00.0% | Unchanged |
| Stifel Financial Corp | 29,473 | $2.71M | 0.00% | +8,879+43.1% | Added |
| Y-Intercept (Hong Kong) Ltd | 29,450 | $2.71M | 0.06% | +29,450 | New |
| Police & Firemen's Retirement System of New Jersey | 28,951 | $2.66M | 0.02% | −1,183−3.9% | Reduced |
| New Age Alpha Advisors, LLC | 28,668 | $2.63M | 0.11% | +28,668 | New |
| Ameritas Investment Partners, Inc. | 28,644 | $2.63M | 0.08% | −643−2.2% | Reduced |
| South Dakota Investment Council | 28,613 | $2.63M | 0.05% | −10,200−26.3% | Reduced |
| Ensign Peak Advisors, Inc | 28,440 | $2.61M | 0.00% | −9,881−25.8% | Reduced |
| Cetera Investment Advisers | 28,391 | $2.61M | 0.00% | +7,528+36.1% | Added |
| Natixis Advisors, L.P. | 28,366 | $2.61M | 0.00% | +2,308+8.9% | Added |
| Diversified Trust Co | 28,355 | $2.61M | 0.05% | −1,267−4.3% | Reduced |
| Meritage Portfolio Management | 27,432 | $2.52M | 0.17% | −1,357−4.7% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 26,938 | $2.48M | 0.01% | −676−2.4% | Reduced |
| F/M Investments LLC | 26,710 | $2.45M | 0.09% | +26,710 | New |
| State Board of Administration of Florida Retirement System | 26,583 | $2.44M | 0.00% | −2,027−7.1% | Reduced |
| Pathstone Holdings, LLC | 26,549 | $2.44M | 0.01% | +6,544+32.7% | Added |
| Linden Thomas Advisory Services, LLC | 26,259 | $2.41M | 0.24% | −143−0.5% | Reduced |
| Nissay Asset Management Corp | 26,105 | $2.40M | 0.01% | +3,848+17.3% | Added |
| Truist Financial Corp | 26,033 | $2.39M | 0.00% | +23,127+795.8% | Added |
| Hennion & Walsh Asset Management, Inc. | 25,979 | $2.39M | 0.08% | −516−1.9% | Reduced |
| State of Michigan Retirement System | 25,400 | $2.33M | 0.01% | −200−0.8% | Reduced |
| Mackenzie Financial Corp | 24,149 | $2.28M | 0.00% | +5,736+31.2% | Added |
| Tower Research Capital LLC (TRC) | 24,705 | $2.27M | 0.05% | +20,930+554.4% | Added |
| STRS Ohio | 24,600 | $2.26M | 0.01% | 00.0% | Unchanged |
| Illinois Municipal Retirement Fund | 24,340 | $2.24M | 0.03% | +5,845+31.6% | Added |
| Elo Mutual Pension Insurance Co | 24,212 | $2.22M | 0.03% | +7,750+47.1% | Added |
| Azzad Asset Management Inc | 24,187 | $2.22M | 0.22% | −638−2.6% | Reduced |
| Skandinaviska Enskilda Banken AB (publ) | 24,177 | $2.22M | 0.01% | +980+4.2% | Added |
| Northwestern Mutual Investment Management Company, LLC | 24,085 | $2.21M | 0.03% | +103+0.4% | Added |
| TD Asset Management Inc | 24,010 | $2.21M | 0.00% | −1,296−5.1% | Reduced |
| Guggenheim Capital LLC | 23,505 | $2.16M | 0.02% | +9,154+63.8% | Added |
| Quantinno Capital Management LP | 23,402 | $2.15M | 0.00% | +3,430+17.2% | Added |
| KLP Kapitalforvaltning AS | 23,000 | $2.11M | 0.01% | +600+2.7% | Added |
| Teacher Retirement System of Texas | 22,771 | $2.09M | 0.01% | −14,265−38.5% | Reduced |
| New Mexico Educational Retirement Board | 22,100 | $2.03M | 0.06% | 00.0% | Unchanged |
| JustInvest LLC | 21,720 | $2.00M | 0.02% | −99−0.5% | Reduced |
| Oregon Public Employees Retirement Fund | 21,516 | $1.98M | 0.03% | −200−0.9% | Reduced |
| US Bancorp | 21,132 | $1.94M | 0.00% | +8,381+65.7% | Added |
| Walleye Capital LLC | 20,794 | $1.91M | 0.01% | +20,794 | New |