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, Q1 2026
Institutional positions in Rambus Inc as of Mar 31, 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
- 557
- +11 vs. Q4 2025
- Shares held
- 102.8M
- +17.0M (+19.8%) vs. Q4 2025
- Total value
- $8.83B
- +$938.8M (+11.9%) vs. Q4 2025
- New holders
- 85
- 189 more added
- Sold out
- 74
- 207 more reduced
8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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 | 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, Q1 2026
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Novem Group | 10,113 | $870.0K | 0.10% | +481+5.0% | Added |
| Wiley Bros.-Aintree Capital, LLC | 10,421 | $887.9K | 0.00% | +3,180+43.9% | Added |
| Portside Wealth Group, LLC | 10,411 | $895.7K | 0.12% | −1,104−9.6% | Reduced |
| Mercer Global Advisors Inc | 10,585 | $910.6K | 0.00% | +1,440+15.7% | Added |
| Public Employees Retirement Association of Colorado | 10,766 | $926.0K | 0.00% | 00.0% | Unchanged |
| Aurora Investment Counsel | 10,883 | $936.3K | 0.52% | −8,315−43.3% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 10,098 | $939.4K | 0.00% | +50+0.5% | Added |
| Defiance ETFs, LLC | 11,439 | $984.1K | 0.01% | +11,439 | New |
| E Fund Management Co., Ltd. | 11,596 | $997.6K | 0.03% | +11,596 | New |
| Sunstone Asset Management, L.P. | 11,746 | $1.01M | 1.19% | +11,746 | New |
| Caitong International Asset Management Co., Ltd | 11,997 | $1.03M | 0.19% | +11,121+1,269.5% | Added |
| The PNC Financial Services Group, Inc. | 12,328 | $1.06M | 0.00% | −641−4.9% | Reduced |
| Allstate Corp | 12,460 | $1.07M | 0.01% | +12,460 | New |
| Penn Capital Management Co Inc | 12,371 | $1.08M | 0.08% | −4,334−25.9% | Reduced |
| Kovitz Investment Group Partners, LLC | 12,789 | $1.10M | 0.03% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 12,805 | $1.10M | 0.00% | −5,686−30.8% | Reduced |
| RE Advisers Corp | 13,000 | $1.12M | 0.03% | +13,000 | New |
| Los Angeles Capital Management LLC | 13,028 | $1.12M | 0.00% | −57,718−81.6% | Reduced |
| Maverick Capital LtdSuperinvestorMaverick Capital | 13,028 | $1.12M | 0.01% | +13,028 | New |
| New York Life Investment Management LLC | 13,521 | $1.16M | 0.01% | +3,501+34.9% | Added |
| Teacher Retirement System of Texas | 14,011 | $1.21M | 0.01% | −8,760−38.5% | Reduced |
| Wesbanco Bank Inc | 14,300 | $1.23M | 0.03% | 00.0% | Unchanged |
| Westfield Capital Management Co LP | 14,436 | $1.24M | 0.01% | −347,656−96.0% | Reduced |
| First Citizens Bank & Trust Co | 14,736 | $1.27M | 0.03% | −77−0.5% | Reduced |
| Quadrant Capital Group LLC | 14,904 | $1.28M | 0.04% | +28+0.2% | Added |
| FORA Capital, LLC | 15,151 | $1.30M | 0.10% | −695−4.4% | Reduced |
| Meiji Yasuda Life Insurance Co | 15,300 | $1.32M | 0.04% | +15,300 | New |
| Xponance, Inc. | 15,331 | $1.32M | 0.01% | +2,119+16.0% | Added |
| Gould Capital, LLC | 15,760 | $1.36M | 0.82% | −2,627−14.3% | Reduced |
| CWM, LLC | 15,769 | $1.36M | 0.00% | −416−2.6% | Reduced |
| Moody National Bank Trust Division | 16,170 | $1.39M | 0.13% | +2,385+17.3% | Added |
| Azzad Asset Management Inc | 16,221 | $1.40M | 0.14% | −7,966−32.9% | Reduced |
| Amundi | 16,384 | $1.41M | 0.00% | +4,013+32.4% | Added |
| Citadel Advisors LLC | 16,495 | $1.42M | 0.00% | −153,407−90.3% | Reduced |
| Envestnet Portfolio Solutions, Inc. | 16,590 | $1.43M | 0.01% | −485−2.8% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 16,682 | $1.44M | 0.00% | −339−2.0% | Reduced |
| Acadian Asset Management LLC | 17,096 | $1.47M | 0.00% | −152,325−89.9% | Reduced |
| Cookson Peirce & Co Inc | 17,328 | $1.49M | 0.06% | +3,721+27.3% | Added |
| Great Lakes Advisors, LLC | 17,751 | $1.53M | 0.01% | −473−2.6% | Reduced |
| Bank of Montreal | 17,851 | $1.54M | 0.00% | +5,959+50.1% | Added |
| Gibbs Wealth Management | 18,234 | $1.57M | 0.21% | +7,121+64.1% | Added |
| Cambiar Investors LLC | 18,494 | $1.59M | 0.07% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 18,621 | $1.60M | 0.02% | +145+0.8% | Added |
| B. Metzler seel. Sohn & Co. AG | 18,658 | $1.61M | 0.01% | 00.0% | Unchanged |
| Tealwood Asset Management Inc | 18,979 | $1.63M | 0.74% | −35−0.2% | Reduced |
| Park Avenue Securities LLC | 18,997 | $1.63M | 0.01% | +137+0.7% | Added |
| Mariner, LLC | 19,275 | $1.66M | 0.00% | −83−0.4% | Reduced |
| Virginia Retirement Systems Et Al | 20,210 | $1.74M | 0.01% | +5,500+37.4% | Added |
| Equitable Holdings, Inc. | 19,563 | $1.80M | 0.01% | +12,630+182.2% | Added |
| XTX Topco Ltd | 21,202 | $1.82M | 0.03% | +21,202 | New |
| Oregon Public Employees Retirement Fund | 22,069 | $1.90M | 0.03% | +553+2.6% | Added |
| New Mexico Educational Retirement Board | 22,100 | $1.90M | 0.06% | 00.0% | Unchanged |
| JustInvest LLC | 22,144 | $1.91M | 0.02% | +424+2.0% | Added |
| Independent Solutions Wealth Management, LLC | 22,574 | $1.94M | 0.29% | +22,574 | New |
| Capstone Capital Management Ltd | 23,326 | $2.01M | 2.02% | +23,326 | New |
| Element Squared LLC | 23,567 | $2.03M | 1.14% | +23,567 | New |
| KLP Kapitalforvaltning AS | 23,800 | $2.05M | 0.01% | +800+3.5% | Added |
| CWA Asset Management Group, LLC | 23,967 | $2.06M | 0.07% | +23,967 | New |
| Baird Financial Group, Inc. | 24,090 | $2.07M | 0.00% | −14,351−37.3% | Reduced |
| Northwestern Mutual Investment Management Company, LLC | 24,116 | $2.07M | 0.03% | +31+0.1% | Added |
| US Bancorp | 24,246 | $2.09M | 0.00% | +3,114+14.7% | Added |
| STRS Ohio | 24,300 | $2.09M | 0.01% | −300−1.2% | Reduced |
| Silvercrest Asset Management Group LLC | 25,451 | $2.19M | 0.02% | −224,535−89.8% | Reduced |
| Quantinno Capital Management LP | 25,621 | $2.20M | 0.00% | +2,219+9.5% | Added |
| Cerity Partners LLC | 25,687 | $2.21M | 0.00% | −4,789−15.7% | Reduced |
| Elo Mutual Pension Insurance Co | 25,691 | $2.21M | 0.04% | +1,479+6.1% | Added |
| Investors Towarzystwo Funduszy Inwestycyjnych Spolka Akcyjna | 25,700 | $2.21M | 0.91% | −4,050−13.6% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 25,727 | $2.21M | 0.07% | −252−1.0% | Reduced |
| State of Michigan Retirement System | 25,900 | $2.23M | 0.01% | +500+2.0% | Added |
| Stifel Financial Corp | 25,943 | $2.23M | 0.00% | −3,530−12.0% | Reduced |
| SG Americas Securities, LLC | 25,962 | $2.23M | 0.00% | −37,690−59.2% | Reduced |
| Linden Thomas Advisory Services, LLC | 26,221 | $2.26M | 0.22% | −38−0.1% | Reduced |
| Nissay Asset Management Corp | 26,374 | $2.27M | 0.01% | +269+1.0% | Added |
| State Board of Administration of Florida Retirement System | 26,583 | $2.29M | 0.00% | 00.0% | Unchanged |
| Vanguard Investments Australia, Ltd. | 26,807 | $2.31M | 0.01% | +26,807 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 26,972 | $2.32M | 0.01% | +34+0.1% | Added |
| Illinois Municipal Retirement Fund | 27,314 | $2.35M | 0.03% | +2,974+12.2% | Added |
| Fifth Third Bancorp | 27,361 | $2.35M | 0.00% | +25,820+1,675.5% | Added |
| Ensign Peak Advisors, Inc | 27,480 | $2.36M | 0.00% | −960−3.4% | Reduced |
| New Age Alpha Advisors, LLC | 27,979 | $2.41M | 0.11% | −689−2.4% | Reduced |
| Emerald Investment Advisers, LLC | 28,090 | $2.42M | 0.22% | +28,090 | New |
| South Dakota Investment Council | 28,613 | $2.46M | 0.05% | 00.0% | Unchanged |
| Cetera Investment Advisers | 28,692 | $2.47M | 0.00% | +301+1.1% | Added |
| Ameritas Investment Partners, Inc. | 28,746 | $2.47M | 0.08% | +102+0.4% | Added |
| Police & Firemen's Retirement System of New Jersey | 29,310 | $2.52M | 0.02% | +359+1.2% | Added |
| Royal Bank of Canada | 29,542 | $2.54M | 0.00% | −4,462−13.1% | Reduced |
| Arizona State Retirement System | 29,569 | $2.54M | 0.01% | −191−0.6% | Reduced |
| ProShare Advisors LLC | 29,844 | $2.57M | 0.00% | −7,926−21.0% | Reduced |
| Natixis Advisors, L.P. | 30,567 | $2.63M | 0.00% | +2,201+7.8% | Added |
| Susquehanna Portfolio Strategies, LLC | 30,578 | $2.63M | 0.04% | −1,948−6.0% | Reduced |
| Louisiana State Employees Retirement System | 31,200 | $2.68M | 0.05% | +1,400+4.7% | Added |
| Yousif Capital Management, LLC | 31,695 | $2.73M | 0.03% | −1,622−4.9% | Reduced |
| Stephens Inc | 32,981 | $2.84M | 0.04% | +3,045+10.2% | Added |
| Future Fund LLC | 34,386 | $2.96M | 1.04% | +34,386 | New |
| Pathstone Holdings, LLC | 36,183 | $3.11M | 0.01% | +9,634+36.3% | Added |
| Y-Intercept (Hong Kong) Ltd | 36,901 | $3.17M | 0.06% | +7,451+25.3% | Added |
| State of New Jersey Common Pension Fund D | 36,975 | $3.18M | 0.01% | 00.0% | Unchanged |
| Pacer Advisors, Inc. | 37,001 | $3.18M | 0.01% | +16,542+80.9% | Added |
| Rice Hall James & Associates, LLC | 37,059 | $3.19M | 0.18% | −7,886−17.5% | Reduced |
| Moody Aldrich Partners LLC | 37,335 | $3.21M | 0.58% | +903+2.5% | Added |