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, 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 | 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, 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 |
|---|---|---|---|---|---|
| KLP Kapitalforvaltning AS | 23,800 | $2.05M | 0.01% | +800+3.5% | Added |
| Element Squared LLC | 23,567 | $2.03M | 1.14% | +23,567 | New |
| Capstone Capital Management Ltd | 23,326 | $2.01M | 2.02% | +23,326 | New |
| Independent Solutions Wealth Management, LLC | 22,574 | $1.94M | 0.29% | +22,574 | New |
| JustInvest LLC | 22,144 | $1.91M | 0.02% | +424+2.0% | Added |
| New Mexico Educational Retirement Board | 22,100 | $1.90M | 0.06% | 00.0% | Unchanged |
| Oregon Public Employees Retirement Fund | 22,069 | $1.90M | 0.03% | +553+2.6% | Added |
| XTX Topco Ltd | 21,202 | $1.82M | 0.03% | +21,202 | New |
| Equitable Holdings, Inc. | 19,563 | $1.80M | 0.01% | +12,630+182.2% | Added |
| Virginia Retirement Systems Et Al | 20,210 | $1.74M | 0.01% | +5,500+37.4% | Added |
| Mariner, LLC | 19,275 | $1.66M | 0.00% | −83−0.4% | Reduced |
| Park Avenue Securities LLC | 18,997 | $1.63M | 0.01% | +137+0.7% | Added |
| Tealwood Asset Management Inc | 18,979 | $1.63M | 0.74% | −35−0.2% | Reduced |
| B. Metzler seel. Sohn & Co. AG | 18,658 | $1.61M | 0.01% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 18,621 | $1.60M | 0.02% | +145+0.8% | Added |
| Cambiar Investors LLC | 18,494 | $1.59M | 0.07% | 00.0% | Unchanged |
| Gibbs Wealth Management | 18,234 | $1.57M | 0.21% | +7,121+64.1% | Added |
| Bank of Montreal | 17,851 | $1.54M | 0.00% | +5,959+50.1% | Added |
| Great Lakes Advisors, LLC | 17,751 | $1.53M | 0.01% | −473−2.6% | Reduced |
| Cookson Peirce & Co Inc | 17,328 | $1.49M | 0.06% | +3,721+27.3% | Added |
| Acadian Asset Management LLC | 17,096 | $1.47M | 0.00% | −152,325−89.9% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 16,682 | $1.44M | 0.00% | −339−2.0% | Reduced |
| Envestnet Portfolio Solutions, Inc. | 16,590 | $1.43M | 0.01% | −485−2.8% | Reduced |
| Citadel Advisors LLC | 16,495 | $1.42M | 0.00% | −153,407−90.3% | Reduced |
| Amundi | 16,384 | $1.41M | 0.00% | +4,013+32.4% | Added |
| Azzad Asset Management Inc | 16,221 | $1.40M | 0.14% | −7,966−32.9% | Reduced |
| Moody National Bank Trust Division | 16,170 | $1.39M | 0.13% | +2,385+17.3% | Added |
| CWM, LLC | 15,769 | $1.36M | 0.00% | −416−2.6% | Reduced |
| Gould Capital, LLC | 15,760 | $1.36M | 0.82% | −2,627−14.3% | Reduced |
| Xponance, Inc. | 15,331 | $1.32M | 0.01% | +2,119+16.0% | Added |
| Meiji Yasuda Life Insurance Co | 15,300 | $1.32M | 0.04% | +15,300 | New |
| FORA Capital, LLC | 15,151 | $1.30M | 0.10% | −695−4.4% | Reduced |
| Quadrant Capital Group LLC | 14,904 | $1.28M | 0.04% | +28+0.2% | Added |
| First Citizens Bank & Trust Co | 14,736 | $1.27M | 0.03% | −77−0.5% | Reduced |
| Westfield Capital Management Co LP | 14,436 | $1.24M | 0.01% | −347,656−96.0% | Reduced |
| Wesbanco Bank Inc | 14,300 | $1.23M | 0.03% | 00.0% | Unchanged |
| Teacher Retirement System of Texas | 14,011 | $1.21M | 0.01% | −8,760−38.5% | Reduced |
| New York Life Investment Management LLC | 13,521 | $1.16M | 0.01% | +3,501+34.9% | Added |
| Maverick Capital LtdSuperinvestorMaverick Capital | 13,028 | $1.12M | 0.01% | +13,028 | New |
| Los Angeles Capital Management LLC | 13,028 | $1.12M | 0.00% | −57,718−81.6% | Reduced |
| RE Advisers Corp | 13,000 | $1.12M | 0.03% | +13,000 | New |
| D. E. Shaw & Co., Inc. | 12,805 | $1.10M | 0.00% | −5,686−30.8% | Reduced |
| Kovitz Investment Group Partners, LLC | 12,789 | $1.10M | 0.03% | 00.0% | Unchanged |
| Penn Capital Management Co Inc | 12,371 | $1.08M | 0.08% | −4,334−25.9% | Reduced |
| Allstate Corp | 12,460 | $1.07M | 0.01% | +12,460 | New |
| The PNC Financial Services Group, Inc. | 12,328 | $1.06M | 0.00% | −641−4.9% | Reduced |
| Caitong International Asset Management Co., Ltd | 11,997 | $1.03M | 0.19% | +11,121+1,269.5% | Added |
| Sunstone Asset Management, L.P. | 11,746 | $1.01M | 1.19% | +11,746 | New |
| E Fund Management Co., Ltd. | 11,596 | $997.6K | 0.03% | +11,596 | New |
| Defiance ETFs, LLC | 11,439 | $984.1K | 0.01% | +11,439 | New |
| Wealth Enhancement Advisory Services, LLC | 10,098 | $939.4K | 0.00% | +50+0.5% | Added |
| Aurora Investment Counsel | 10,883 | $936.3K | 0.52% | −8,315−43.3% | Reduced |
| Public Employees Retirement Association of Colorado | 10,766 | $926.0K | 0.00% | 00.0% | Unchanged |
| Mercer Global Advisors Inc | 10,585 | $910.6K | 0.00% | +1,440+15.7% | Added |
| Portside Wealth Group, LLC | 10,411 | $895.7K | 0.12% | −1,104−9.6% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 10,421 | $887.9K | 0.00% | +3,180+43.9% | Added |
| Novem Group | 10,113 | $870.0K | 0.10% | +481+5.0% | Added |
| BNC Wealth Management, LLC | 10,068 | $866.1K | 0.24% | −1,000−9.0% | Reduced |
| Argent Capital Management LLC | 10,001 | $860.4K | 0.03% | +3,598+56.2% | Added |
| Rakuten Investment Management, Inc. | 10,627 | $847.3K | 0.00% | +698+7.0% | Added |
| Bailard, Inc. | 9,375 | $806.5K | 0.02% | −1,704−15.4% | Reduced |
| FIL Ltd | 9,366 | $805.8K | 0.00% | −2,408−20.5% | Reduced |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | 9,346 | $804.0K | 0.01% | +1,721+22.6% | Added |
| Profund Advisors LLC | 9,342 | $803.7K | 0.03% | −858−8.4% | Reduced |
| Two Sigma Securities, LLC | 8,849 | $761.3K | 0.09% | +3,300+59.5% | Added |
| Jones Financial Companies LLLP | 8,433 | $756.7K | 0.00% | +6,508+338.1% | Added |
| Legato Capital Management LLC | 8,791 | $756.3K | 0.07% | −96−1.1% | Reduced |
| Empowered Funds, LLC | 8,443 | $726.4K | 0.00% | +8,443 | New |
| Prelude Capital Management, LLC | 8,262 | $710.8K | 0.05% | +5,935+255.0% | Added |
| Marshall Financial Group LLC | 8,067 | $694.0K | 0.11% | +266+3.4% | Added |
| Nations Financial Group Inc, | 7,959 | $684.7K | 0.04% | −87−1.1% | Reduced |
| Securian Asset Management, Inc | 7,935 | $682.6K | 0.03% | +114+1.5% | Added |
| Sequoia Financial Advisors, LLC | 7,878 | $677.7K | 0.00% | +344+4.6% | Added |
| Evolve Private Wealth, LLC | 7,878 | $677.7K | 0.04% | +539+7.3% | Added |
| Private Advisor Group, LLC | 7,735 | $665.4K | 0.00% | −784−9.2% | Reduced |
| Kerr Financial Planning Corp | 6,050 | $661.1K | 0.82% | −1,900−23.9% | Reduced |
| Keebeck Wealth Management, LLC | 7,439 | $640.0K | 0.07% | −341−4.4% | Reduced |
| Sanctuary Advisors, LLC | 7,407 | $637.2K | 0.00% | −154−2.0% | Reduced |
| Inspire Advisors, LLC | 7,383 | $635.1K | 0.05% | +1,163+18.7% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 7,316 | $629.4K | 0.00% | +7,316 | New |
| Sumitomo Mitsui Trust Holdings, Inc. | 7,252 | $623.9K | 0.00% | −208−2.8% | Reduced |
| Yorktown Management & Research Co Inc | 7,000 | $602.2K | 0.50% | 00.0% | Unchanged |
| M&T Bank Corp | 6,943 | $597.5K | 0.00% | +1,710+32.7% | Added |
| Atria Investments LLC | 6,941 | $597.1K | 0.01% | +1,003+16.9% | Added |
| Evergreen Capital Management LLC | 6,876 | $591.5K | 0.01% | −5,749−45.5% | Reduced |
| Alliance Wealth Advisors, LLC | 6,870 | $591.0K | 0.13% | −2,334−25.4% | Reduced |
| Leonteq Securities AG | 6,749 | $580.6K | 0.04% | +6,716+20,351.5% | Added |
| Jennison Associates LLC | 6,739 | $579.8K | 0.00% | −5,233−43.7% | Reduced |
| Vontobel Holding Ltd. | 6,686 | $575.2K | 0.00% | +1,807+37.0% | Added |
| Federation des caisses Desjardins du Quebec | 6,664 | $573.3K | 0.00% | −2,253−25.3% | Reduced |
| Wincap Financial LLC | 6,658 | $572.8K | 0.38% | +6,658 | New |
| Norden Group LLC | 6,601 | $567.9K | 0.05% | −1,281−16.3% | Reduced |
| Oak Grove Capital LLC | 6,600 | $567.8K | 0.10% | −1,000−13.2% | Reduced |
| RSM US Wealth Management LLC | 6,578 | $565.9K | 0.01% | +67+1.0% | Added |
| Diversify Advisory Services, LLC | 5,041 | $565.4K | 0.09% | −7,252−59.0% | Reduced |
| Independent Financial Group, LLC | 6,525 | $561.3K | 0.01% | −370−5.4% | Reduced |
| Crossmark Global Holdings, Inc. | 6,522 | $561.1K | 0.01% | −24−0.4% | Reduced |
| Swiss Life Asset Management Ltd | 6,473 | $556.9K | 0.00% | −1,350−17.3% | Reduced |
| Himension Fund | 6,432 | $553.3K | 0.04% | −28−0.4% | Reduced |
| Kestra Private Wealth Services, LLC | 6,423 | $552.6K | 0.01% | −272−4.1% | Reduced |