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, Q4 2025
Institutional positions in Rambus Inc as of Dec 31, 2025. 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
- 554
- +50 vs. Q3 2025
- Shares held
- 99.8M
- +1.42M (+1.4%) vs. Q3 2025
- Total value
- $9.18B
- −$1.08B (−10.5%) vs. Q3 2025
- New holders
- 103
- 190 more added
- Sold out
- 53
- 195 more reduced
9 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Truvestments Capital LLC | 3,607 | $331.4K | 0.06% | −184−4.9% | Reduced |
| Vise Technologies, Inc. | 3,627 | $333.3K | 0.01% | +781+27.4% | Added |
| Shelton Capital Management | 3,677 | $337.9K | 0.01% | −227−5.8% | Reduced |
| Callan Family Office, LLC | 3,710 | $340.9K | 0.01% | +1,676+82.4% | Added |
| Keybank National Association | 3,806 | $349.7K | 0.00% | −909−19.3% | Reduced |
| Oak Ridge Investments LLC | 3,828 | $351.8K | 0.02% | +1,805+89.2% | Added |
| Snowden Capital Advisors LLC | 3,841 | $352.9K | 0.01% | +1,849+92.8% | Added |
| Skopos Labs, Inc. | 3,785 | $354.2K | 0.02% | +3,785 | New |
| Meeder Advisory Services, Inc. | 3,883 | $356.8K | 0.02% | +114+3.0% | Added |
| Simplex Trading, LLC | 3,884 | $356.9K | 0.01% | +3,884 | New |
| Forum Financial Management, LP | 3,891 | $357.5K | 0.00% | 00.0% | Unchanged |
| Verition Fund Management LLC | 4,091 | $375.9K | 0.00% | −2,306−36.0% | Reduced |
| Larson Financial Group LLC | 4,120 | $378.6K | 0.01% | −155−3.6% | Reduced |
| Buckingham Strategic Partners | 4,181 | $384.2K | 0.00% | −1,383−24.9% | Reduced |
| CI Private Wealth, LLC | 4,297 | $395.2K | 0.00% | −2,108−32.9% | Reduced |
| CoreCap Advisors, LLC | 4,367 | $401.3K | 0.01% | −330−7.0% | Reduced |
| Cresset Asset Management, LLC | 4,488 | $412.4K | 0.00% | +587+15.0% | Added |
| Merit Financial Group, LLC | 4,586 | $421.4K | 0.00% | +526+13.0% | Added |
| Bank Julius Baer & Co. Ltd, Zurich | 4,598 | $422.5K | 0.00% | +572+14.2% | Added |
| GAMMA Investing LLC | 4,833 | $444.1K | 0.02% | +153+3.3% | Added |
| TSFG, LLC | 4,856 | $446.0K | 0.07% | +50+1.0% | Added |
| Vontobel Holding Ltd. | 4,879 | $448.3K | 0.00% | −624−11.3% | Reduced |
| Nisa Investment Advisors, LLC | 4,891 | $449.4K | 0.00% | −27−0.5% | Reduced |
| Commonwealth Equity Services, LLC | 4,897 | $450.0K | 0.00% | −7,852−61.6% | Reduced |
| Abel Hall, LLC | 4,994 | $458.9K | 0.11% | +4,994 | New |
| Rockland Trust Co | 4,996 | $459.1K | 0.02% | 00.0% | Unchanged |
| Ak Global Asset Management, LLC | 5,000 | $459.4K | 0.40% | +5,000 | New |
| Blair William & Co | 5,055 | $464.5K | 0.00% | +155+3.2% | Added |
| M&T Bank Corp | 5,233 | $481.2K | 0.00% | +272+5.5% | Added |
| Aviva PLC | 5,246 | $482.1K | 0.00% | −540−9.3% | Reduced |
| Systematic Alpha Investments, LLC | 5,300 | $487.0K | 0.02% | +5,300 | New |
| Coldstream Capital Management Inc | 5,317 | $488.6K | 0.01% | −386−6.8% | Reduced |
| Alps Advisors Inc | 5,356 | $492.2K | 0.00% | +59+1.1% | Added |
| Northwestern Mutual Wealth Management Co | 5,362 | $492.7K | 0.00% | +751+16.3% | Added |
| Jane Street Group, LLC | 5,455 | $501.3K | 0.00% | −187,695−97.2% | Reduced |
| Global Retirement Partners, LLC | 5,460 | $501.7K | 0.01% | +3,195+141.1% | Added |
| Squarepoint Ops LLC | 5,496 | $505.0K | 0.00% | +5,496 | New |
| Two Sigma Securities, LLC | 5,549 | $509.9K | 0.07% | +2,047+58.5% | Added |
| AE Wealth Management LLC | 5,553 | $510.3K | 0.00% | +313+6.0% | Added |
| Qube Research & Technologies Ltd | 5,648 | $519.0K | 0.00% | −23,469−80.6% | Reduced |
| Greenwood Capital Associates LLC | 5,656 | $519.7K | 0.06% | −705−11.1% | Reduced |
| Inceptionr LLC | 5,816 | $534.4K | 0.15% | −5,846−50.1% | Reduced |
| M.E. Allison & Co., Inc. | 5,897 | $541.9K | 0.37% | 00.0% | Unchanged |
| Atria Investments LLC | 5,938 | $545.6K | 0.01% | −1,332−18.3% | Reduced |
| Global X Japan Co., Ltd. | 5,945 | $546.3K | 0.04% | +560+10.4% | Added |
| VGI Partners Ltd | 6,000 | $551.3K | 0.03% | +2,000+50.0% | Added |
| Inspire Advisors, LLC | 6,220 | $571.6K | 0.05% | +6,220 | New |
| TCG Advisory Services, LLC | 6,260 | $575.2K | 0.02% | −21−0.3% | Reduced |
| Calamos Advisors LLC | 6,316 | $580.4K | 0.00% | −3,026−32.4% | Reduced |
| Harbor Capital Advisors, Inc. | 6,403 | $588.0K | 0.05% | −2,847−30.8% | Reduced |
| Argent Capital Management LLC | 6,403 | $588.4K | 0.02% | +6,403 | New |
| Himension Fund | 6,460 | $593.6K | 0.04% | +3,990+161.5% | Added |
| Integrated Advisors Network LLC | 6,475 | $595.0K | 0.03% | −834−11.4% | Reduced |
| Crossmark Global Holdings, Inc. | 6,546 | $601.5K | 0.01% | +25+0.4% | Added |
| OP Asset Management Ltd | 6,565 | $603.3K | 0.01% | −7,318−52.7% | Reduced |
| Kestra Private Wealth Services, LLC | 6,695 | $615.2K | 0.01% | +6,695 | New |
| Brinker Capital Investments, LLC | 6,706 | $616.2K | 0.00% | +38+0.6% | Added |
| RSM US Wealth Management LLC | 6,511 | $616.5K | 0.01% | −185−2.8% | Reduced |
| Axq Capital, LP | 6,742 | $619.5K | 0.14% | +6,742 | New |
| Independent Financial Group, LLC | 6,895 | $633.6K | 0.01% | −4,836−41.2% | Reduced |
| Harvest Fund Management Co., Ltd | 6,938 | $637.0K | 0.02% | −2,950−29.8% | Reduced |
| Equitable Holdings, Inc. | 6,933 | $637.1K | 0.00% | +276+4.1% | Added |
| Diametric Capital, LP | 6,991 | $642.4K | 0.17% | +6,991 | New |
| China Universal Asset Management Co., Ltd. | 7,000 | $643.2K | 0.05% | −1,000−12.5% | Reduced |
| Yorktown Management & Research Co Inc | 7,000 | $643.2K | 0.51% | 00.0% | Unchanged |
| Lido Advisors, LLC | 6,344 | $648.9K | 0.00% | +48+0.8% | Added |
| CIBC World Markets Corp | 7,143 | $656.4K | 0.00% | +7,143 | New |
| Group One Trading, L.P. | 7,229 | $664.3K | 0.02% | −2,105−22.6% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 7,241 | $666.6K | 0.00% | +5,255+264.6% | Added |
| Fox Run Management, L.L.C. | 7,303 | $671.1K | 0.10% | +7,303 | New |
| Financiere des Professionnels - Fonds d,investissement inc. | 7,317 | $672.4K | 0.04% | 00.0% | Unchanged |
| Evolve Private Wealth, LLC | 7,339 | $674.4K | 0.04% | +7,339 | New |
| Sumitomo Mitsui Trust Holdings, Inc. | 7,460 | $685.5K | 0.00% | +506+7.3% | Added |
| Sequoia Financial Advisors, LLC | 7,534 | $692.3K | 0.00% | +1,878+33.2% | Added |
| Sanctuary Advisors, LLC | 7,561 | $694.7K | 0.00% | −512−6.3% | Reduced |
| Oak Grove Capital LLC | 7,600 | $698.4K | 0.14% | +100+1.3% | Added |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | 7,625 | $700.7K | 0.01% | +1,966+34.7% | Added |
| Keebeck Wealth Management, LLC | 7,780 | $714.9K | 0.08% | +173+2.3% | Added |
| Marshall Financial Group LLC | 7,801 | $716.8K | 0.14% | +7,801 | New |
| Securian Asset Management, Inc | 7,821 | $718.7K | 0.03% | −237−2.9% | Reduced |
| Swiss Life Asset Management Ltd | 7,823 | $718.9K | 0.00% | +2,937+60.1% | Added |
| Norden Group LLC | 7,882 | $724.3K | 0.07% | +227+3.0% | Added |
| Nations Financial Group Inc, | 8,046 | $739.3K | 0.04% | −832−9.4% | Reduced |
| Private Advisor Group, LLC | 8,519 | $782.8K | 0.00% | +1,792+26.6% | Added |
| Kerr Financial Planning Corp | 7,950 | $786.6K | 1.07% | 00.0% | Unchanged |
| O'Shaughnessy Asset Management, LLC | 8,600 | $790.3K | 0.00% | +3,258+61.0% | Added |
| Legato Capital Management LLC | 8,887 | $816.6K | 0.07% | −3,564−28.6% | Reduced |
| Federation des caisses Desjardins du Quebec | 8,917 | $819.4K | 0.00% | +8,487+1,973.7% | Added |
| Mercer Global Advisors Inc | 9,145 | $840.3K | 0.00% | +1,386+17.9% | Added |
| Alliance Wealth Advisors, LLC | 9,204 | $845.8K | 0.18% | −3,731−28.8% | Reduced |
| MML Investors Services, LLC | 9,249 | $849.9K | 0.00% | +1,915+26.1% | Added |
| Sigma Planning Corp | 9,460 | $870.6K | 0.02% | +4,217+80.4% | Added |
| Novem Group | 9,632 | $885.1K | 0.10% | +9,632 | New |
| Intesa Sanpaolo S.p.A. | 9,639 | $895.6K | 0.06% | +9,639 | New |
| GTS Securities LLC | 9,846 | $904.7K | 0.03% | +2,325+30.9% | Added |
| FirstWave Capital Management LLC | 9,933 | $912.7K | 0.54% | +9,933 | New |
| Vestmark Advisory Solutions, Inc. | 9,992 | $918.2K | 0.01% | +7,963+392.5% | Added |
| New York Life Investment Management LLC | 10,020 | $920.7K | 0.01% | +10,020 | New |
| Rakuten Investment Management, Inc. | 9,929 | $929.1K | 0.00% | −42,458−81.0% | Reduced |
| Profund Advisors LLC | 10,200 | $937.3K | 0.03% | +360+3.7% | Added |