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 |
|---|---|---|---|---|---|
| Financiere des Professionnels - Fonds d,investissement inc. | 2,299 | $197.8K | 0.01% | −5,018−68.6% | Reduced |
| Parallel Advisors, LLC | 2,252 | $193.7K | 0.00% | −251−10.0% | Reduced |
| Corient IA LLC | 2,230 | $191.8K | 0.18% | −270−10.8% | Reduced |
| EverSource Wealth Advisors, LLC | 2,188 | $188.3K | 0.01% | +282+14.8% | Added |
| Public Employees Retirement System of Ohio | 2,185 | $188.0K | 0.00% | −686−23.9% | Reduced |
| SBI Securities Co., Ltd. | 1,853 | $159.4K | 0.00% | +246+15.3% | Added |
| Horizon Investments, LLC | 1,846 | $158.8K | 0.00% | −15,178−89.2% | Reduced |
| Exchange Traded Concepts, LLC | 1,846 | $158.8K | 0.00% | −729−28.3% | Reduced |
| Allworth Financial LP | 1,697 | $146.0K | 0.00% | +257+17.8% | Added |
| Stonehage Fleming Financial Services Holdings Ltd | 1,634 | $140.6K | 0.01% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 1,580 | $135.9K | 0.00% | +6+0.4% | Added |
| OP Asset Management Ltd | 1,468 | $126.3K | 0.00% | −5,097−77.6% | Reduced |
| Signaturefd, LLC | 1,420 | $122.1K | 0.00% | +44+3.2% | Added |
| Northwestern Mutual Wealth Management Co | 1,342 | $115.5K | 0.00% | −4,020−75.0% | Reduced |
| Smartleaf Asset Management LLC | 1,377 | $109.8K | 0.00% | −1,057−43.4% | Reduced |
| Versant Capital Management, Inc | 1,276 | $109.8K | 0.01% | −38−2.9% | Reduced |
| Byrne Asset Management LLC | 1,237 | $106.4K | 0.06% | +1,237 | New |
| Eurizon Capital SGR S.p.A. | 1,324 | $106.1K | 0.00% | −363−21.5% | Reduced |
| Umb Bank N A | 1,219 | $104.9K | 0.00% | −39−3.1% | Reduced |
| Daiwa Securities Group Inc. | 1,160 | $99.8K | 0.00% | −200−14.7% | Reduced |
| MAI Capital Management | 1,121 | $96.4K | 0.00% | +47+4.4% | Added |
| GWM Advisors LLC | 1,070 | $92.0K | 0.00% | −886−45.3% | Reduced |
| Larson Financial Group LLC | 1,017 | $87.5K | 0.00% | −3,103−75.3% | Reduced |
| Ronald Blue Trust, Inc. | 1,015 | $87.3K | 0.00% | −422−29.4% | Reduced |
| Clear Street Markets LLC | 800 | $68.8K | 0.03% | +800 | New |
| Kemnay Advisory Services Inc. | 730 | $62.8K | 0.01% | −342−31.9% | Reduced |
| Orion Capital Management LLC | 703 | $60.5K | 0.02% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 699 | $60.1K | 0.00% | −6−0.9% | Reduced |
| Banque Cantonale Vaudoise | 689 | $59.0K | 0.00% | 00.0% | Unchanged |
| Advisory Services Network, LLC | 665 | $57.2K | 0.00% | +665 | New |
| State of Wyoming | 657 | $56.5K | 0.01% | −443−40.3% | Reduced |
| Bartlett & Co. Wealth Management LLC | 500 | $55.8K | 0.00% | 00.0% | Unchanged |
| Bayforest Capital Ltd | 632 | $54.4K | 0.06% | −641−50.4% | Reduced |
| Spire Wealth Management | 601 | $51.7K | 0.00% | +299+99.0% | Added |
| Covestor Ltd | 585 | $51.0K | 0.04% | −1,469−71.5% | Reduced |
| IFP Advisors, Inc | 502 | $43.2K | 0.00% | +39+8.4% | Added |
| Massmutual Trust Co FSB | 485 | $41.7K | 0.00% | −1−0.2% | Reduced |
| Optiver Holding B.V. | 480 | $41.3K | 0.00% | −85−15.0% | Reduced |
| True Wealth Design, LLC | 465 | $40.0K | 0.01% | +47+11.2% | Added |
| Rakuten Securities, Inc. | 439 | $37.8K | 0.02% | −117−21.0% | Reduced |
| Steward Partners Investment Advisory, LLC | 411 | $35.4K | 0.00% | +27+7.0% | Added |
| PenderFund Capital Management Ltd. | 400 | $34.4K | 0.01% | +170+73.9% | Added |
| Group One Trading, L.P. | 372 | $32.0K | 0.00% | −6,857−94.9% | Reduced |
| Private Wealth Asset Management, LLC | 339 | $29.2K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 310 | $26.7K | 0.00% | +63+25.5% | Added |
| University of Texas/Texas Am Investment Managment Co | 308 | $26.5K | 0.00% | 00.0% | Unchanged |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 306 | $26.3K | 0.00% | +241+370.8% | Added |
| Tradewinds Capital Management, LLC | 296 | $25.5K | 0.01% | 00.0% | Unchanged |
| Private Trust Co NA | 288 | $24.8K | 0.00% | +56+24.1% | Added |
| Strategic Advocates LLC | 287 | $24.7K | 0.11% | +74+34.7% | Added |
| Acumen Wealth Advisors, LLC | 275 | $23.7K | 0.01% | −1−0.4% | Reduced |
| Crewe Advisors LLC | 273 | $23.5K | 0.00% | +49+21.9% | Added |
| Wall Street Financial Group, Inc. | 268 | $23.1K | 0.01% | +268 | New |
| Whittier Trust Co of Nevada Inc | 231 | $21.3K | 0.00% | −55−19.2% | Reduced |
| Root Financial Partners, LLC | 247 | $21.2K | 0.00% | +23+10.3% | Added |
| Essential Partners LLC | 239 | $20.6K | 0.01% | −3−1.2% | Reduced |
| Steigerwald, Gordon & Koch Inc. | 236 | $20.3K | 0.00% | 00.0% | Unchanged |
| Hollencrest Capital Management | 235 | $20.2K | 0.00% | −2,250−90.5% | Reduced |
| Strive Financial Group ,LLC | 210 | $18.0K | 0.01% | 00.0% | Unchanged |
| Mather Group, LLC. | 204 | $17.6K | 0.00% | +204 | New |
| Danske Bank A/S | 200 | $17.2K | 0.00% | −77,528−99.7% | Reduced |
| Aventura Private Wealth, LLC | 199 | $17.1K | 0.01% | 00.0% | Unchanged |
| Rossby Financial, LCC | 162 | $14.6K | 0.00% | +87+116.0% | Added |
| First Horizon Corp | 156 | $13.4K | 0.00% | +5+3.3% | Added |
| Abound Wealth Management | 155 | $13.4K | 0.00% | 00.0% | Unchanged |
| Harbor Capital Advisors, Inc. | 152 | $13.0K | 0.00% | −6,251−97.6% | Reduced |
| Contravisory Investment Management, Inc. | 142 | $12.2K | 0.00% | 00.0% | Unchanged |
| Parkside Financial Bank & Trust | 140 | $12.0K | 0.00% | +32+29.6% | Added |
| Key Financial Inc | 137 | $11.8K | 0.00% | 00.0% | Unchanged |
| Fairscale Capital, LLC | 132 | $11.4K | 0.01% | 00.0% | Unchanged |
| Harvest Fund Management Co., Ltd | 129 | $11.0K | 0.00% | −6,809−98.1% | Reduced |
| Innovative Asset Advisors Group, LLC | 126 | $10.8K | 0.01% | +126 | New |
| Cedar Mountain Advisors, LLC | 115 | $9.89K | 0.00% | +115 | New |
| First Pacific Financial | 113 | $9.72K | 0.00% | +25+28.4% | Added |
| SHP Wealth Management | 112 | $9.63K | 0.00% | +8+7.7% | Added |
| Fortitude Family Office, LLC | 102 | $8.78K | 0.00% | +29+39.7% | Added |
| Globeflex Capital L P | 101 | $8.69K | 0.00% | −59,002−99.8% | Reduced |
| Global Trust Asset Management, LLC | 100 | $8.60K | 0.00% | −155−60.8% | Reduced |
| JFS Wealth Advisors, LLC | 100 | $8.60K | 0.00% | −5−4.8% | Reduced |
| Geneos Wealth Management Inc. | 100 | $8.60K | 0.00% | 00.0% | Unchanged |
| Wolff Wiese Magana LLC | 99 | $8.52K | 0.00% | 00.0% | Unchanged |
| Farmers & Merchants Investments Inc | 97 | $8.35K | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 95 | $8.17K | 0.00% | 00.0% | Unchanged |
| Sunbelt Securities, Inc. | 94 | $8.09K | 0.00% | 00.0% | Unchanged |
| CVA Family Office, LLC | 93 | $8.00K | 0.00% | +81+675.0% | Added |
| Private Wealth Management Group, LLC | 88 | $7.57K | 0.00% | 00.0% | Unchanged |
| TD Waterhouse Canada Inc. | 75 | $6.74K | 0.00% | 00.0% | Unchanged |
| MJT & Associates Financial Advisory Group, Inc. | 74 | $6.37K | 0.00% | 00.0% | Unchanged |
| WPG Advisers, LLC | 74 | $6.37K | 0.00% | −25−25.3% | Reduced |
| LRI Investments, LLC | 71 | $6.11K | 0.00% | +41+136.7% | Added |
| Keating Financial Advisory Services, Inc. | 67 | $5.76K | 0.00% | +9+15.5% | Added |
| Bell Investment Advisors, Inc | 65 | $5.59K | 0.00% | −52−44.4% | Reduced |
| Crews Bank & Trust | 59 | $5.08K | 0.00% | +59 | New |
| Brown Brothers Harriman & Co | 56 | $4.82K | 0.00% | 00.0% | Unchanged |
| Legacy Wealth Managment, LLC | 56 | $4.82K | 0.00% | 00.0% | Unchanged |
| Colonial Trust Co | 50 | $4.30K | 0.00% | +10+25.0% | Added |
| Whittier Trust Co | 46 | $4.24K | 0.00% | 00.0% | Unchanged |
| Sachetta, LLC | 47 | $4.04K | 0.00% | +5+11.9% | Added |
| Valley National Advisers Inc | 50 | $4.00K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 45 | $3.87K | 0.00% | −1,453−97.0% | Reduced |