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 |
|---|---|---|---|---|---|
| Handelsbanken Fonder AB | 31,797 | $2.92M | 0.01% | −2,000−5.9% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 32,526 | $2.99M | 0.05% | 00.0% | Unchanged |
| Royal Bank of Canada | 34,004 | $3.12M | 0.00% | −42,307−55.4% | Reduced |
| Weiss Asset Management LP | 36,300 | $3.34M | 0.05% | +36,300 | New |
| Moody Aldrich Partners LLC | 36,432 | $3.35M | 0.62% | −11,371−23.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 36,802 | $3.38M | 0.01% | +360+1.0% | Added |
| State of New Jersey Common Pension Fund D | 36,975 | $3.40M | 0.01% | +648+1.8% | Added |
| EFG International AG | 37,531 | $3.45M | 0.07% | +37,531 | New |
| ProShare Advisors LLC | 37,770 | $3.47M | 0.01% | +4,812+14.6% | Added |
| Aspetuck Financial Management LLC | 38,175 | $3.51M | 2.36% | −4,100−9.7% | Reduced |
| Baird Financial Group, Inc. | 38,441 | $3.53M | 0.01% | −18,113−32.0% | Reduced |
| Yousif Capital Management, LLC | 33,317 | $3.67M | 0.04% | −518−1.5% | Reduced |
| Campbell Newman Asset Management Inc | 40,346 | $3.71M | 0.27% | −1,505−3.6% | Reduced |
| Pictet Asset Management Holding SA | 40,751 | $3.74M | 0.00% | +25,846+173.4% | Added |
| Captrust Financial Advisors | 40,876 | $3.76M | 0.01% | −1,158−2.8% | Reduced |
| New York State Common Retirement Fund | 41,938 | $3.85M | 0.01% | −83,775−66.6% | Reduced |
| Toroso Investments, LLC | 42,502 | $3.91M | 0.02% | +26,168+160.2% | Added |
| Rice Hall James & Associates, LLC | 44,945 | $4.13M | 0.23% | −3,834−7.9% | Reduced |
| Amalgamated Bank | 45,339 | $4.17M | 0.03% | −1,885−4.0% | Reduced |
| Assenagon Asset Management S.A. | 46,357 | $4.26M | 0.01% | −48,297−51.0% | Reduced |
| Two Sigma Advisers, LP | 46,700 | $4.29M | 0.01% | +6,600+16.5% | Added |
| Primecap Management Co | 47,500 | $4.36M | 0.00% | −11,500−19.5% | Reduced |
| Nicholas Investment Partners, LP | 47,803 | $4.39M | 0.32% | +31,173+187.5% | Added |
| Teachers Retirement System of the State of Kentucky | 49,360 | $4.54M | 0.03% | 00.0% | Unchanged |
| M37 Management LP | 50,000 | $4.59M | 3.16% | +50,000 | New |
| State of Tennessee, Treasury Department | 42,268 | $4.81M | 0.02% | −1,810−4.1% | Reduced |
| Erste Asset Management GmbH | 55,600 | $5.23M | 0.04% | +5,600+11.2% | Added |
| Thornburg Investment Management Inc | 57,554 | $5.29M | 0.07% | −11,037−16.1% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 57,799 | $5.31M | 0.01% | +56,699+5,154.5% | Added |
| American Century Companies Inc | 58,302 | $5.36M | 0.00% | +23,311+66.6% | Added |
| Globeflex Capital L P | 59,103 | $5.43M | 0.83% | −4,715−7.4% | Reduced |
| EAM Investors, LLC | 60,957 | $5.60M | 0.62% | −28,244−31.7% | Reduced |
| Great West Life Assurance Co | 61,971 | $5.69M | 0.01% | −20,272−24.6% | Reduced |
| SG Americas Securities, LLC | 63,652 | $5.85M | 0.01% | +19,772+45.1% | Added |
| Vident Advisory, LLC | 66,071 | $6.07M | 0.06% | +8,984+15.7% | Added |
| Victory Capital Management Inc | 66,985 | $6.16M | 0.00% | −2,512−3.6% | Reduced |
| Fred Alger Management, LLC | 67,203 | $6.18M | 0.02% | −90−0.1% | Reduced |
| Envestnet Asset Management Inc | 69,387 | $6.38M | 0.00% | −23,737−25.5% | Reduced |
| Trexquant Investment LP | 74,943 | $6.89M | 0.06% | +74,943 | New |
| New York State Teachers Retirement System | 76,926 | $7.07M | 0.01% | +4,065+5.6% | Added |
| Danske Bank A/S | 77,728 | $7.14M | 0.02% | −23,330−23.1% | Reduced |
| Los Angeles Capital Management LLC | 70,746 | $7.62M | 0.03% | −7,286−9.3% | Reduced |
| LPL Financial LLC | 84,535 | $7.77M | 0.00% | −16,066−16.0% | Reduced |
| Hillsdale Investment Management Inc. | 88,990 | $8.18M | 0.23% | −23,710−21.0% | Reduced |
| Osterweis Capital Management Inc | 89,065 | $8.18M | 0.35% | −62,495−41.2% | Reduced |
| Creative Planning | 91,313 | $8.39M | 0.01% | +4,715+5.4% | Added |
| Bessemer Group Inc | 93,728 | $8.61M | 0.01% | +90.0% | Added |
| Thrivent Financial for Lutherans | 94,495 | $8.68M | 0.02% | +69,776+282.3% | Added |
| AMJ Financial Wealth Management | 94,946 | $8.72M | 2.10% | +67,973+252.0% | Added |
| Ranger Investment Management, L.P. | 95,490 | $8.77M | 0.60% | +95,490 | New |
| Castleark Management LLC | 95,578 | $8.78M | 0.26% | −15,260−13.8% | Reduced |
| Deutsche Bank AG | 97,196 | $8.93M | 0.00% | −28,748−22.8% | Reduced |
| SummitTX Capital, L.P. | 97,372 | $8.95M | 0.27% | +29,984+44.5% | Added |
| California State Teachers Retirement System | 101,025 | $9.28M | 0.01% | −94−0.1% | Reduced |
| State of Wisconsin Investment Board | 101,320 | $9.31M | 0.02% | −13,674−11.9% | Reduced |
| Tudor Investment Corp Et Al | 101,605 | $9.34M | 0.05% | +101,605 | New |
| Schroder Investment Management Group | 99,055 | $9.38M | 0.01% | −44,038−30.8% | Reduced |
| DekaBank Deutsche Girozentrale | 154,173 | $9.52M | 0.02% | 00.0% | Unchanged |
| Segall Bryant & Hamill, LLC | 108,429 | $9.96M | 0.13% | −139,650−56.3% | Reduced |
| Renaissance Group LLC | 108,775 | $10.0M | 0.40% | +308+0.3% | Added |
| Assetmark, Inc | 110,754 | $10.2M | 0.02% | −10,395−8.6% | Reduced |
| Manufacturers Life Insurance Company, The | 113,988 | $10.5M | 0.01% | −1,382−1.2% | Reduced |
| Intech Investment Management LLC | 120,052 | $11.0M | 0.10% | +55,481+85.9% | Added |
| Nordea Investment Management AB | 120,976 | $11.2M | 0.01% | −18,454−13.2% | Reduced |
| Janney Montgomery Scott LLC | 122,562 | $11.3M | 0.03% | +122,562 | New |
| Retirement Systems of Alabama | 129,198 | $11.9M | 0.04% | −890−0.7% | Reduced |
| Federated Hermes, Inc. | 129,360 | $11.9M | 0.02% | +19,519+17.8% | Added |
| Mutual of America Capital Management LLC | 136,390 | $12.5M | 0.13% | −5,484−3.9% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 137,692 | $12.7M | 0.02% | +85,257+162.6% | Added |
| Russell Investments Group, Ltd. | 142,390 | $13.1M | 0.01% | −5,881−4.0% | Reduced |
| Two Sigma Investments, LP | 144,403 | $13.3M | 0.02% | +66,513+85.4% | Added |
| Van Eck Associates Corp | 147,123 | $13.5M | 0.01% | −5,389−3.5% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 150,124 | $13.8M | 0.02% | −2,409−1.6% | Reduced |
| Bridgewater Associates, LP | 154,296 | $14.2M | 0.05% | −20,818−11.9% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 157,148 | $14.4M | 0.04% | +27,472+21.2% | Added |
| HighTower Advisors, LLC | 157,470 | $14.5M | 0.02% | +3,441+2.2% | Added |
| Man Group plc | 162,940 | $15.0M | 0.03% | +28,565+21.3% | Added |
| Axiom Investors LLC | 163,242 | $15.0M | 0.13% | +163,242 | New |
| Acadian Asset Management LLC | 169,421 | $15.6M | 0.03% | +8,293+5.1% | Added |
| Citadel Advisors LLC | 169,902 | $15.6M | 0.01% | +101,199+147.3% | Added |
| Glenmede Trust Co NA | 172,534 | $15.9M | 0.08% | +172,534 | New |
| Legal & General Group Plc | 177,596 | $16.3M | 0.00% | −42,118−19.2% | Reduced |
| WCM Investment Management, LLC | 172,366 | $16.3M | 0.03% | −126,514−42.3% | Reduced |
| Schwartz Investment Counsel Inc | 180,337 | $16.6M | 0.58% | −50,000−21.7% | Reduced |
| Stephens Investment Management Group LLC | 193,702 | $17.8M | 0.23% | +311+0.2% | Added |
| California Public Employees Retirement System | 196,207 | $18.0M | 0.01% | +116+0.1% | Added |
| Algert Global LLC | 202,222 | $18.6M | 0.29% | +79,835+65.2% | Added |
| Swiss National Bank | 212,200 | $19.5M | 0.01% | +4,000+1.9% | Added |
| Prudential Financial Inc | 213,642 | $19.6M | 0.02% | −7,379−3.3% | Reduced |
| Nomura Asset Management International Inc. | 216,867 | $19.9M | 0.03% | +216,867 | New |
| Wells Fargo & Company | 216,914 | $19.9M | 0.00% | +35,934+19.9% | Added |
| Advisor Group Holdings, Inc. | 217,072 | $19.9M | 0.03% | −7,583−3.4% | Reduced |
| MetLife Investment Management | 240,162 | $22.1M | 0.11% | −5,650−2.3% | Reduced |
| UBS Asset Management Americas Inc | 244,344 | $22.5M | 0.00% | −9,562−3.8% | Reduced |
| BNP Paribas Arbitrage, SA | 246,494 | $22.7M | 0.01% | +81,183+49.1% | Added |
| Silvercrest Asset Management Group LLC | 249,986 | $23.0M | 0.16% | −214,903−46.2% | Reduced |
| Millennium Management LLC | 262,578 | $24.1M | 0.02% | +65,346+33.1% | Added |
| Granahan Investment Management Inc | 265,516 | $24.4M | 1.04% | +27,073+11.4% | Added |
| ArrowMark Colorado Holdings LLC | 272,010 | $25.0M | 0.55% | +272,010 | New |
| Westwood Holdings Group Inc. | 285,073 | $26.2M | 0.21% | +50,016+21.3% | Added |