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 |
|---|---|---|---|---|---|
| Vestcor Inc | 3,419 | $294.0K | 0.01% | +1,523+80.3% | Added |
| Fifth Third Wealth Advisors LLC | 3,455 | $297.2K | 0.01% | +151+4.6% | Added |
| Callan Family Office, LLC | 3,466 | $298.2K | 0.01% | −244−6.6% | Reduced |
| Abel Hall, LLC | 3,486 | $299.9K | 0.06% | −1,508−30.2% | Reduced |
| Ethic Inc. | 3,540 | $304.5K | 0.00% | +30+0.9% | Added |
| Ground Swell Capital, LLC | 3,613 | $310.8K | 0.61% | +3,613 | New |
| Meeder Advisory Services, Inc. | 3,639 | $313.1K | 0.01% | −244−6.3% | Reduced |
| Shelton Capital Management | 3,677 | $316.3K | 0.01% | 00.0% | Unchanged |
| National Bank of Canada | 3,779 | $325.0K | 0.00% | +733+24.1% | Added |
| Resonant Capital Advisors, LLC | 3,819 | $328.5K | 0.02% | +3,819 | New |
| Concurrent Investment Advisors, LLC | 3,826 | $329.2K | 0.00% | +472+14.1% | Added |
| Vise Technologies, Inc. | 3,627 | $333.3K | 0.01% | 00.0% | Unchanged |
| AE Wealth Management LLC | 3,893 | $334.9K | 0.00% | −1,660−29.9% | Reduced |
| Cim Investment Mangement Inc | 4,072 | $350.3K | 0.09% | +4,072 | New |
| Brinker Capital Investments, LLC | 4,205 | $361.8K | 0.00% | −2,501−37.3% | Reduced |
| CI Private Wealth, LLC | 4,318 | $369.3K | 0.00% | +21+0.5% | Added |
| Savvy Advisors, Inc. | 4,308 | $370.6K | 0.01% | +4,308 | New |
| Inceptionr LLC | 4,351 | $374.3K | 0.09% | −1,465−25.2% | Reduced |
| Bank Julius Baer & Co. Ltd, Zurich | 4,464 | $384.1K | 0.00% | −134−2.9% | Reduced |
| Merit Financial Group, LLC | 4,485 | $385.8K | 0.00% | −101−2.2% | Reduced |
| Qsemble Capital Management, LP | 4,529 | $389.6K | 0.03% | +4,529 | New |
| QVT Financial LP | 4,648 | $399.9K | 0.03% | +4,648 | New |
| Aviva PLC | 4,708 | $405.0K | 0.00% | −538−10.3% | Reduced |
| Cresset Asset Management, LLC | 4,762 | $409.7K | 0.00% | +274+6.1% | Added |
| Bokf, NA | 4,774 | $410.7K | 0.01% | −5,992−55.7% | Reduced |
| Ashton Thomas Private Wealth, LLC | 4,785 | $411.7K | 0.01% | +1,340+38.9% | Added |
| GAMMA Investing LLC | 4,823 | $414.9K | 0.02% | −10−0.2% | Reduced |
| O'Shaughnessy Asset Management, LLC | 4,833 | $415.8K | 0.00% | −3,767−43.8% | Reduced |
| Nisa Investment Advisors, LLC | 4,876 | $419.5K | 0.00% | −15−0.3% | Reduced |
| TSFG, LLC | 4,906 | $422.0K | 0.06% | +50+1.0% | Added |
| Blair William & Co | 4,960 | $426.7K | 0.00% | −95−1.9% | Reduced |
| Rockland Trust Co | 4,996 | $429.8K | 0.02% | 00.0% | Unchanged |
| Ak Global Asset Management, LLC | 5,000 | $430.0K | 0.40% | 00.0% | Unchanged |
| Commonwealth Equity Services, LLC | 5,100 | $438.8K | 0.00% | +203+4.1% | Added |
| Skopos Labs, Inc. | 5,142 | $442.4K | 0.01% | +1,357+35.9% | Added |
| Jump Financial, LLC | 5,164 | $444.3K | 0.01% | −6,335−55.1% | Reduced |
| DnB Asset Management AS | 5,233 | $450.2K | 0.00% | +5,233 | New |
| TCG Advisory Services, LLC | 5,258 | $452.3K | 0.01% | −1,002−16.0% | Reduced |
| Alps Advisors Inc | 5,271 | $453.5K | 0.00% | −85−1.6% | Reduced |
| Systematic Alpha Investments, LLC | 5,300 | $456.0K | 0.02% | 00.0% | Unchanged |
| Coldstream Capital Management Inc | 5,325 | $458.1K | 0.01% | +8+0.2% | Added |
| CenterBook Partners LP | 5,412 | $465.6K | 0.03% | +5,412 | New |
| Jane Street Group, LLC | 5,426 | $466.8K | 0.00% | −29−0.5% | Reduced |
| MML Investors Services, LLC | 5,479 | $471.3K | 0.00% | −3,770−40.8% | Reduced |
| Marshall Wace, LLP | 5,526 | $475.4K | 0.00% | −10,774−66.1% | Reduced |
| Greenwood Capital Associates LLC | 5,599 | $481.7K | 0.05% | −57−1.0% | Reduced |
| Marex Group plc | 5,634 | $484.7K | 0.01% | +5,634 | New |
| Gotham Asset Management, LLC | 5,867 | $504.7K | 0.00% | −11,918−67.0% | Reduced |
| M.E. Allison & Co., Inc. | 5,897 | $507.3K | 0.34% | 00.0% | Unchanged |
| Intesa Sanpaolo S.p.A. | 6,239 | $509.2K | 0.03% | −3,400−35.3% | Reduced |
| CIBC Bancorp USA Inc. | 5,922 | $509.5K | 0.00% | +5,922 | New |
| China Universal Asset Management Co., Ltd. | 6,000 | $516.2K | 0.04% | −1,000−14.3% | Reduced |
| Global X Japan Co., Ltd. | 6,045 | $520.1K | 0.03% | +100+1.7% | Added |
| Monolith Management Ltd | 6,200 | $533.4K | 0.21% | +6,200 | New |
| Beacon Pointe Advisors, LLC | 6,231 | $536.1K | 0.00% | +6,231 | New |
| Lido Advisors, LLC | 6,242 | $537.0K | 0.00% | −102−1.6% | Reduced |
| HSBC Holdings PLC | 6,329 | $544.3K | 0.00% | −14,105−69.0% | Reduced |
| Kestra Private Wealth Services, LLC | 6,423 | $552.6K | 0.01% | −272−4.1% | Reduced |
| Himension Fund | 6,432 | $553.3K | 0.04% | −28−0.4% | Reduced |
| Swiss Life Asset Management Ltd | 6,473 | $556.9K | 0.00% | −1,350−17.3% | Reduced |
| Crossmark Global Holdings, Inc. | 6,522 | $561.1K | 0.01% | −24−0.4% | Reduced |
| Independent Financial Group, LLC | 6,525 | $561.3K | 0.01% | −370−5.4% | Reduced |
| Diversify Advisory Services, LLC | 5,041 | $565.4K | 0.09% | −7,252−59.0% | Reduced |
| RSM US Wealth Management LLC | 6,578 | $565.9K | 0.01% | +67+1.0% | Added |
| Oak Grove Capital LLC | 6,600 | $567.8K | 0.10% | −1,000−13.2% | Reduced |
| Norden Group LLC | 6,601 | $567.9K | 0.05% | −1,281−16.3% | Reduced |
| Wincap Financial LLC | 6,658 | $572.8K | 0.38% | +6,658 | New |
| Federation des caisses Desjardins du Quebec | 6,664 | $573.3K | 0.00% | −2,253−25.3% | Reduced |
| Vontobel Holding Ltd. | 6,686 | $575.2K | 0.00% | +1,807+37.0% | Added |
| Jennison Associates LLC | 6,739 | $579.8K | 0.00% | −5,233−43.7% | Reduced |
| Leonteq Securities AG | 6,749 | $580.6K | 0.04% | +6,716+20,351.5% | Added |
| Alliance Wealth Advisors, LLC | 6,870 | $591.0K | 0.13% | −2,334−25.4% | Reduced |
| Evergreen Capital Management LLC | 6,876 | $591.5K | 0.01% | −5,749−45.5% | Reduced |
| Atria Investments LLC | 6,941 | $597.1K | 0.01% | +1,003+16.9% | Added |
| M&T Bank Corp | 6,943 | $597.5K | 0.00% | +1,710+32.7% | Added |
| Yorktown Management & Research Co Inc | 7,000 | $602.2K | 0.50% | 00.0% | Unchanged |
| Sumitomo Mitsui Trust Holdings, Inc. | 7,252 | $623.9K | 0.00% | −208−2.8% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 7,316 | $629.4K | 0.00% | +7,316 | New |
| Inspire Advisors, LLC | 7,383 | $635.1K | 0.05% | +1,163+18.7% | Added |
| Sanctuary Advisors, LLC | 7,407 | $637.2K | 0.00% | −154−2.0% | Reduced |
| Keebeck Wealth Management, LLC | 7,439 | $640.0K | 0.07% | −341−4.4% | Reduced |
| Kerr Financial Planning Corp | 6,050 | $661.1K | 0.82% | −1,900−23.9% | Reduced |
| Private Advisor Group, LLC | 7,735 | $665.4K | 0.00% | −784−9.2% | Reduced |
| Evolve Private Wealth, LLC | 7,878 | $677.7K | 0.04% | +539+7.3% | Added |
| Sequoia Financial Advisors, LLC | 7,878 | $677.7K | 0.00% | +344+4.6% | Added |
| Securian Asset Management, Inc | 7,935 | $682.6K | 0.03% | +114+1.5% | Added |
| Nations Financial Group Inc, | 7,959 | $684.7K | 0.04% | −87−1.1% | Reduced |
| Marshall Financial Group LLC | 8,067 | $694.0K | 0.11% | +266+3.4% | Added |
| Prelude Capital Management, LLC | 8,262 | $710.8K | 0.05% | +5,935+255.0% | Added |
| Empowered Funds, LLC | 8,443 | $726.4K | 0.00% | +8,443 | New |
| Legato Capital Management LLC | 8,791 | $756.3K | 0.07% | −96−1.1% | Reduced |
| Jones Financial Companies LLLP | 8,433 | $756.7K | 0.00% | +6,508+338.1% | Added |
| Two Sigma Securities, LLC | 8,849 | $761.3K | 0.09% | +3,300+59.5% | Added |
| Profund Advisors LLC | 9,342 | $803.7K | 0.03% | −858−8.4% | Reduced |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | 9,346 | $804.0K | 0.01% | +1,721+22.6% | Added |
| FIL Ltd | 9,366 | $805.8K | 0.00% | −2,408−20.5% | Reduced |
| Bailard, Inc. | 9,375 | $806.5K | 0.02% | −1,704−15.4% | Reduced |
| Rakuten Investment Management, Inc. | 10,627 | $847.3K | 0.00% | +698+7.0% | Added |
| Argent Capital Management LLC | 10,001 | $860.4K | 0.03% | +3,598+56.2% | Added |
| BNC Wealth Management, LLC | 10,068 | $866.1K | 0.24% | −1,000−9.0% | Reduced |