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 |
|---|---|---|---|---|---|
| Steigerwald, Gordon & Koch Inc. | 236 | $20.3K | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 239 | $20.6K | 0.01% | −3−1.2% | Reduced |
| Root Financial Partners, LLC | 247 | $21.2K | 0.00% | +23+10.3% | Added |
| Whittier Trust Co of Nevada Inc | 231 | $21.3K | 0.00% | −55−19.2% | Reduced |
| Wall Street Financial Group, Inc. | 268 | $23.1K | 0.01% | +268 | New |
| Crewe Advisors LLC | 273 | $23.5K | 0.00% | +49+21.9% | Added |
| Acumen Wealth Advisors, LLC | 275 | $23.7K | 0.01% | −1−0.4% | Reduced |
| Strategic Advocates LLC | 287 | $24.7K | 0.11% | +74+34.7% | Added |
| Private Trust Co NA | 288 | $24.8K | 0.00% | +56+24.1% | Added |
| Tradewinds Capital Management, LLC | 296 | $25.5K | 0.01% | 00.0% | Unchanged |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 306 | $26.3K | 0.00% | +241+370.8% | Added |
| University of Texas/Texas Am Investment Managment Co | 308 | $26.5K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 310 | $26.7K | 0.00% | +63+25.5% | Added |
| Private Wealth Asset Management, LLC | 339 | $29.2K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 372 | $32.0K | 0.00% | −6,857−94.9% | Reduced |
| PenderFund Capital Management Ltd. | 400 | $34.4K | 0.01% | +170+73.9% | Added |
| Steward Partners Investment Advisory, LLC | 411 | $35.4K | 0.00% | +27+7.0% | Added |
| Rakuten Securities, Inc. | 439 | $37.8K | 0.02% | −117−21.0% | Reduced |
| True Wealth Design, LLC | 465 | $40.0K | 0.01% | +47+11.2% | Added |
| Optiver Holding B.V. | 480 | $41.3K | 0.00% | −85−15.0% | Reduced |
| Massmutual Trust Co FSB | 485 | $41.7K | 0.00% | −1−0.2% | Reduced |
| IFP Advisors, Inc | 502 | $43.2K | 0.00% | +39+8.4% | Added |
| Covestor Ltd | 585 | $51.0K | 0.04% | −1,469−71.5% | Reduced |
| Spire Wealth Management | 601 | $51.7K | 0.00% | +299+99.0% | Added |
| Bayforest Capital Ltd | 632 | $54.4K | 0.06% | −641−50.4% | Reduced |
| Bartlett & Co. Wealth Management LLC | 500 | $55.8K | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 657 | $56.5K | 0.01% | −443−40.3% | Reduced |
| Advisory Services Network, LLC | 665 | $57.2K | 0.00% | +665 | New |
| Banque Cantonale Vaudoise | 689 | $59.0K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 699 | $60.1K | 0.00% | −6−0.9% | Reduced |
| Orion Capital Management LLC | 703 | $60.5K | 0.02% | 00.0% | Unchanged |
| Kemnay Advisory Services Inc. | 730 | $62.8K | 0.01% | −342−31.9% | Reduced |
| Clear Street Markets LLC | 800 | $68.8K | 0.03% | +800 | New |
| Ronald Blue Trust, Inc. | 1,015 | $87.3K | 0.00% | −422−29.4% | Reduced |
| Larson Financial Group LLC | 1,017 | $87.5K | 0.00% | −3,103−75.3% | Reduced |
| GWM Advisors LLC | 1,070 | $92.0K | 0.00% | −886−45.3% | Reduced |
| MAI Capital Management | 1,121 | $96.4K | 0.00% | +47+4.4% | Added |
| Daiwa Securities Group Inc. | 1,160 | $99.8K | 0.00% | −200−14.7% | Reduced |
| Umb Bank N A | 1,219 | $104.9K | 0.00% | −39−3.1% | Reduced |
| Eurizon Capital SGR S.p.A. | 1,324 | $106.1K | 0.00% | −363−21.5% | Reduced |
| Byrne Asset Management LLC | 1,237 | $106.4K | 0.06% | +1,237 | New |
| Versant Capital Management, Inc | 1,276 | $109.8K | 0.01% | −38−2.9% | Reduced |
| Smartleaf Asset Management LLC | 1,377 | $109.8K | 0.00% | −1,057−43.4% | Reduced |
| Northwestern Mutual Wealth Management Co | 1,342 | $115.5K | 0.00% | −4,020−75.0% | Reduced |
| Signaturefd, LLC | 1,420 | $122.1K | 0.00% | +44+3.2% | Added |
| OP Asset Management Ltd | 1,468 | $126.3K | 0.00% | −5,097−77.6% | Reduced |
| Harbour Investments, Inc. | 1,580 | $135.9K | 0.00% | +6+0.4% | Added |
| Stonehage Fleming Financial Services Holdings Ltd | 1,634 | $140.6K | 0.01% | 00.0% | Unchanged |
| Allworth Financial LP | 1,697 | $146.0K | 0.00% | +257+17.8% | 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 |
| SBI Securities Co., Ltd. | 1,853 | $159.4K | 0.00% | +246+15.3% | Added |
| Public Employees Retirement System of Ohio | 2,185 | $188.0K | 0.00% | −686−23.9% | Reduced |
| EverSource Wealth Advisors, LLC | 2,188 | $188.3K | 0.01% | +282+14.8% | Added |
| Corient IA LLC | 2,230 | $191.8K | 0.18% | −270−10.8% | Reduced |
| Parallel Advisors, LLC | 2,252 | $193.7K | 0.00% | −251−10.0% | Reduced |
| Financiere des Professionnels - Fonds d,investissement inc. | 2,299 | $197.8K | 0.01% | −5,018−68.6% | Reduced |
| MeadowBrook Investment Advisors LLC | 2,365 | $203.5K | 0.18% | +205+9.5% | Added |
| Advisors Asset Management, Inc. | 2,368 | $203.7K | 0.00% | +217+10.1% | Added |
| Trust Point Inc. | 2,372 | $204.1K | 0.02% | +55+2.4% | Added |
| D.A. Davidson & Co. | 2,400 | $206.5K | 0.00% | 00.0% | Unchanged |
| Hantz Financial Services, Inc. | 2,422 | $208.0K | 0.00% | −343−12.4% | Reduced |
| Everhart Financial Group, Inc. | 2,428 | $208.9K | 0.02% | +2,428 | New |
| Mirabella Financial Services LLP | 2,485 | $213.8K | 0.02% | −252−9.2% | Reduced |
| First Manhattan Co | 2,495 | $214.6K | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 2,540 | $218.5K | 0.00% | −628−19.8% | Reduced |
| Stoneridge Investment Partners LLC | 2,548 | $219.0K | 0.16% | +2,548 | New |
| JDH Wealth Management, LLC | 2,579 | $221.9K | 0.15% | +9+0.4% | Added |
| Pinnacle Wealth Planning Services, Inc. | 2,584 | $222.3K | 0.02% | +349+15.6% | Added |
| Ewa, LLC | 2,597 | $223.4K | 0.05% | −19−0.7% | Reduced |
| Fox Run Management, L.L.C. | 2,826 | $225.3K | 0.04% | −4,477−61.3% | Reduced |
| AlphaGrep UK Ltd | 2,669 | $229.6K | 0.07% | +92+3.6% | Added |
| Gagnon Securities LLC | 2,722 | $234.2K | 0.05% | +11+0.4% | Added |
| Farther Finance Advisors, LLC | 2,636 | $237.1K | 0.00% | +293+12.5% | Added |
| Truvestments Capital LLC | 2,867 | $246.6K | 0.04% | −740−20.5% | Reduced |
| Abacus Wealth Partners, LLC | 2,898 | $249.3K | 0.02% | +688+31.1% | Added |
| Truist Financial Corp | 2,902 | $249.7K | 0.00% | −23,131−88.9% | Reduced |
| VisionPoint Advisory Group, LLC | 2,932 | $252.2K | 0.05% | +108+3.8% | Added |
| Snowden Capital Advisors LLC | 2,934 | $252.4K | 0.01% | −907−23.6% | Reduced |
| Ami Asset Management Corp | 2,950 | $253.8K | 0.02% | +2,950 | New |
| 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 |
| Everence Capital Management Inc | 3,003 | $258.0K | 0.02% | +413+15.9% | Added |
| Keybank National Association | 2,999 | $258.0K | 0.00% | −807−21.2% | Reduced |
| Chase Investment Counsel Corp | 3,018 | $259.0K | 0.07% | +3,018 | New |
| Oarsman Capital, Inc. | 3,020 | $259.8K | 0.03% | −400−11.7% | Reduced |
| Winton Group Ltd | 3,051 | $262.5K | 0.01% | +3,051 | New |
| Bamco Inc | 3,111 | $267.6K | 0.00% | +3,111 | New |
| Krilogy Financial LLC | 2,238 | $268.6K | 0.01% | +81+3.8% | Added |
| ProCore Advisors, LLC | 3,123 | $268.7K | 0.41% | −258−7.6% | Reduced |
| Oppenheimer Asset Management Inc. | 3,221 | $277.1K | 0.00% | +3,221 | New |
| Focused Alpha, LLC | 3,269 | $281.2K | 0.09% | +3,269 | New |
| Greenleaf Trust | 3,284 | $282.5K | 0.00% | −202−5.8% | Reduced |
| KBC Group NV | 3,316 | $285.0K | 0.00% | 00.0% | Unchanged |
| Blackstone Group Inc. | 3,314 | $285.1K | 0.00% | +3,314 | New |
| Sanchez Gaunt Capital Management, LLC | 3,329 | $286.4K | 0.18% | +3,329 | New |
| HHM Wealth Advisors, LLC | 3,335 | $286.9K | 0.03% | 00.0% | Unchanged |
| United Capital Financial Advisers, LLC | 3,363 | $289.3K | 0.00% | +840+33.3% | Added |
| Buckingham Strategic Partners | 3,394 | $290.4K | 0.00% | −787−18.8% | Reduced |
| CIBC Asset Management Inc | 3,410 | $293.4K | 0.00% | 00.0% | Unchanged |