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 |
|---|---|---|---|---|---|
| HSBC Holdings PLC | 6,329 | $544.3K | 0.00% | −14,105−69.0% | Reduced |
| Lido Advisors, LLC | 6,242 | $537.0K | 0.00% | −102−1.6% | Reduced |
| Beacon Pointe Advisors, LLC | 6,231 | $536.1K | 0.00% | +6,231 | New |
| Monolith Management Ltd | 6,200 | $533.4K | 0.21% | +6,200 | New |
| Global X Japan Co., Ltd. | 6,045 | $520.1K | 0.03% | +100+1.7% | Added |
| China Universal Asset Management Co., Ltd. | 6,000 | $516.2K | 0.04% | −1,000−14.3% | Reduced |
| CIBC Bancorp USA Inc. | 5,922 | $509.5K | 0.00% | +5,922 | New |
| Intesa Sanpaolo S.p.A. | 6,239 | $509.2K | 0.03% | −3,400−35.3% | Reduced |
| M.E. Allison & Co., Inc. | 5,897 | $507.3K | 0.34% | 00.0% | Unchanged |
| Gotham Asset Management, LLC | 5,867 | $504.7K | 0.00% | −11,918−67.0% | Reduced |
| Marex Group plc | 5,634 | $484.7K | 0.01% | +5,634 | New |
| Greenwood Capital Associates LLC | 5,599 | $481.7K | 0.05% | −57−1.0% | Reduced |
| Marshall Wace, LLP | 5,526 | $475.4K | 0.00% | −10,774−66.1% | Reduced |
| MML Investors Services, LLC | 5,479 | $471.3K | 0.00% | −3,770−40.8% | Reduced |
| Jane Street Group, LLC | 5,426 | $466.8K | 0.00% | −29−0.5% | Reduced |
| CenterBook Partners LP | 5,412 | $465.6K | 0.03% | +5,412 | New |
| Coldstream Capital Management Inc | 5,325 | $458.1K | 0.01% | +8+0.2% | Added |
| Systematic Alpha Investments, LLC | 5,300 | $456.0K | 0.02% | 00.0% | Unchanged |
| Alps Advisors Inc | 5,271 | $453.5K | 0.00% | −85−1.6% | Reduced |
| TCG Advisory Services, LLC | 5,258 | $452.3K | 0.01% | −1,002−16.0% | Reduced |
| DnB Asset Management AS | 5,233 | $450.2K | 0.00% | +5,233 | New |
| Jump Financial, LLC | 5,164 | $444.3K | 0.01% | −6,335−55.1% | Reduced |
| Skopos Labs, Inc. | 5,142 | $442.4K | 0.01% | +1,357+35.9% | Added |
| Commonwealth Equity Services, LLC | 5,100 | $438.8K | 0.00% | +203+4.1% | Added |
| Ak Global Asset Management, LLC | 5,000 | $430.0K | 0.40% | 00.0% | Unchanged |
| Rockland Trust Co | 4,996 | $429.8K | 0.02% | 00.0% | Unchanged |
| Blair William & Co | 4,960 | $426.7K | 0.00% | −95−1.9% | Reduced |
| TSFG, LLC | 4,906 | $422.0K | 0.06% | +50+1.0% | Added |
| Nisa Investment Advisors, LLC | 4,876 | $419.5K | 0.00% | −15−0.3% | Reduced |
| O'Shaughnessy Asset Management, LLC | 4,833 | $415.8K | 0.00% | −3,767−43.8% | Reduced |
| GAMMA Investing LLC | 4,823 | $414.9K | 0.02% | −10−0.2% | Reduced |
| Ashton Thomas Private Wealth, LLC | 4,785 | $411.7K | 0.01% | +1,340+38.9% | Added |
| Bokf, NA | 4,774 | $410.7K | 0.01% | −5,992−55.7% | Reduced |
| Cresset Asset Management, LLC | 4,762 | $409.7K | 0.00% | +274+6.1% | Added |
| Aviva PLC | 4,708 | $405.0K | 0.00% | −538−10.3% | Reduced |
| QVT Financial LP | 4,648 | $399.9K | 0.03% | +4,648 | New |
| Qsemble Capital Management, LP | 4,529 | $389.6K | 0.03% | +4,529 | New |
| Merit Financial Group, LLC | 4,485 | $385.8K | 0.00% | −101−2.2% | Reduced |
| Bank Julius Baer & Co. Ltd, Zurich | 4,464 | $384.1K | 0.00% | −134−2.9% | Reduced |
| Inceptionr LLC | 4,351 | $374.3K | 0.09% | −1,465−25.2% | Reduced |
| Savvy Advisors, Inc. | 4,308 | $370.6K | 0.01% | +4,308 | New |
| CI Private Wealth, LLC | 4,318 | $369.3K | 0.00% | +21+0.5% | Added |
| Brinker Capital Investments, LLC | 4,205 | $361.8K | 0.00% | −2,501−37.3% | Reduced |
| Cim Investment Mangement Inc | 4,072 | $350.3K | 0.09% | +4,072 | New |
| AE Wealth Management LLC | 3,893 | $334.9K | 0.00% | −1,660−29.9% | Reduced |
| Vise Technologies, Inc. | 3,627 | $333.3K | 0.01% | 00.0% | Unchanged |
| Concurrent Investment Advisors, LLC | 3,826 | $329.2K | 0.00% | +472+14.1% | Added |
| Resonant Capital Advisors, LLC | 3,819 | $328.5K | 0.02% | +3,819 | New |
| National Bank of Canada | 3,779 | $325.0K | 0.00% | +733+24.1% | Added |
| Shelton Capital Management | 3,677 | $316.3K | 0.01% | 00.0% | Unchanged |
| Meeder Advisory Services, Inc. | 3,639 | $313.1K | 0.01% | −244−6.3% | Reduced |
| Ground Swell Capital, LLC | 3,613 | $310.8K | 0.61% | +3,613 | New |
| Ethic Inc. | 3,540 | $304.5K | 0.00% | +30+0.9% | Added |
| Abel Hall, LLC | 3,486 | $299.9K | 0.06% | −1,508−30.2% | Reduced |
| Callan Family Office, LLC | 3,466 | $298.2K | 0.01% | −244−6.6% | Reduced |
| Fifth Third Wealth Advisors LLC | 3,455 | $297.2K | 0.01% | +151+4.6% | Added |
| Vestcor Inc | 3,419 | $294.0K | 0.01% | +1,523+80.3% | Added |
| CIBC Asset Management Inc | 3,410 | $293.4K | 0.00% | 00.0% | Unchanged |
| Buckingham Strategic Partners | 3,394 | $290.4K | 0.00% | −787−18.8% | Reduced |
| United Capital Financial Advisers, LLC | 3,363 | $289.3K | 0.00% | +840+33.3% | Added |
| HHM Wealth Advisors, LLC | 3,335 | $286.9K | 0.03% | 00.0% | Unchanged |
| Sanchez Gaunt Capital Management, LLC | 3,329 | $286.4K | 0.18% | +3,329 | New |
| Blackstone Group Inc. | 3,314 | $285.1K | 0.00% | +3,314 | New |
| KBC Group NV | 3,316 | $285.0K | 0.00% | 00.0% | Unchanged |
| Greenleaf Trust | 3,284 | $282.5K | 0.00% | −202−5.8% | Reduced |
| Focused Alpha, LLC | 3,269 | $281.2K | 0.09% | +3,269 | New |
| Oppenheimer Asset Management Inc. | 3,221 | $277.1K | 0.00% | +3,221 | New |
| ProCore Advisors, LLC | 3,123 | $268.7K | 0.41% | −258−7.6% | Reduced |
| Krilogy Financial LLC | 2,238 | $268.6K | 0.01% | +81+3.8% | Added |
| Bamco Inc | 3,111 | $267.6K | 0.00% | +3,111 | New |
| Winton Group Ltd | 3,051 | $262.5K | 0.01% | +3,051 | New |
| Oarsman Capital, Inc. | 3,020 | $259.8K | 0.03% | −400−11.7% | Reduced |
| Chase Investment Counsel Corp | 3,018 | $259.0K | 0.07% | +3,018 | New |
| Keybank National Association | 2,999 | $258.0K | 0.00% | −807−21.2% | Reduced |
| Everence Capital Management Inc | 3,003 | $258.0K | 0.02% | +413+15.9% | Added |
| Journey Strategic Wealth LLC | 2,995 | $257.7K | 0.01% | +118+4.1% | Added |
| Centiva Capital, LP | 2,995 | $257.7K | 0.01% | +2,995 | New |
| Ami Asset Management Corp | 2,950 | $253.8K | 0.02% | +2,950 | New |
| Snowden Capital Advisors LLC | 2,934 | $252.4K | 0.01% | −907−23.6% | Reduced |
| VisionPoint Advisory Group, LLC | 2,932 | $252.2K | 0.05% | +108+3.8% | Added |
| Truist Financial Corp | 2,902 | $249.7K | 0.00% | −23,131−88.9% | Reduced |
| Abacus Wealth Partners, LLC | 2,898 | $249.3K | 0.02% | +688+31.1% | Added |
| Truvestments Capital LLC | 2,867 | $246.6K | 0.04% | −740−20.5% | Reduced |
| Farther Finance Advisors, LLC | 2,636 | $237.1K | 0.00% | +293+12.5% | Added |
| Gagnon Securities LLC | 2,722 | $234.2K | 0.05% | +11+0.4% | Added |
| AlphaGrep UK Ltd | 2,669 | $229.6K | 0.07% | +92+3.6% | Added |
| Fox Run Management, L.L.C. | 2,826 | $225.3K | 0.04% | −4,477−61.3% | Reduced |
| Ewa, LLC | 2,597 | $223.4K | 0.05% | −19−0.7% | Reduced |
| Pinnacle Wealth Planning Services, Inc. | 2,584 | $222.3K | 0.02% | +349+15.6% | Added |
| JDH Wealth Management, LLC | 2,579 | $221.9K | 0.15% | +9+0.4% | Added |
| Stoneridge Investment Partners LLC | 2,548 | $219.0K | 0.16% | +2,548 | New |
| Clearstead Advisors, LLC | 2,540 | $218.5K | 0.00% | −628−19.8% | Reduced |
| First Manhattan Co | 2,495 | $214.6K | 0.00% | 00.0% | Unchanged |
| Mirabella Financial Services LLP | 2,485 | $213.8K | 0.02% | −252−9.2% | Reduced |
| Everhart Financial Group, Inc. | 2,428 | $208.9K | 0.02% | +2,428 | New |
| Hantz Financial Services, Inc. | 2,422 | $208.0K | 0.00% | −343−12.4% | Reduced |
| D.A. Davidson & Co. | 2,400 | $206.5K | 0.00% | 00.0% | Unchanged |
| Trust Point Inc. | 2,372 | $204.1K | 0.02% | +55+2.4% | Added |
| Advisors Asset Management, Inc. | 2,368 | $203.7K | 0.00% | +217+10.1% | Added |
| MeadowBrook Investment Advisors LLC | 2,365 | $203.5K | 0.18% | +205+9.5% | Added |