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, Q3 2025
Institutional positions in Rambus Inc as of Sep 30, 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
- 513
- +62 vs. Q2 2025
- Shares held
- 98.8M
- +3.82M (+4.0%) vs. Q2 2025
- Total value
- $10.3B
- +$4.21B (+69.3%) vs. Q2 2025
- New holders
- 123
- 169 more added
- Sold out
- 61
- 163 more reduced
8 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Swiss Life Asset Management Ltd | 4,886 | $509.1K | 0.00% | +4,886 | New |
| Blair William & Co | 4,900 | $510.6K | 0.00% | +360+7.9% | Added |
| Nisa Investment Advisors, LLC | 4,918 | $512.5K | 0.00% | +675+15.9% | Added |
| M&T Bank Corp | 4,961 | $517.1K | 0.00% | −21−0.4% | Reduced |
| K.J. Harrison & Partners Inc | 5,000 | $518.5K | 0.07% | −2,500−33.3% | Reduced |
| Rockland Trust Co | 4,996 | $520.6K | 0.02% | 00.0% | Unchanged |
| AE Wealth Management LLC | 5,240 | $546.0K | 0.00% | +499+10.5% | Added |
| Sigma Planning Corp | 5,243 | $546.3K | 0.02% | +5,243 | New |
| Alps Advisors Inc | 5,297 | $551.9K | 0.00% | −1,373−20.6% | Reduced |
| O'Shaughnessy Asset Management, LLC | 5,342 | $556.6K | 0.00% | +2,008+60.2% | Added |
| Polymer Capital Management (US) LLC | 5,374 | $560.0K | 0.07% | +5,374 | New |
| Global X Japan Co., Ltd. | 5,385 | $561.1K | 0.05% | +5,385 | New |
| Jennison Associates LLC | 5,406 | $563.3K | 0.00% | +5,406 | New |
| Vontobel Holding Ltd. | 5,503 | $573.4K | 0.00% | +5,503 | New |
| Bayforest Capital Ltd | 5,621 | $585.7K | 0.28% | +4,138+279.0% | Added |
| Twin Tree Management, LP | 5,624 | $586.0K | 0.03% | +5,624 | New |
| Sequoia Financial Advisors, LLC | 5,656 | $589.4K | 0.00% | +359+6.8% | Added |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | 5,659 | $589.7K | 0.01% | +5,659 | New |
| Coldstream Capital Management Inc | 5,703 | $594.3K | 0.01% | +125+2.2% | Added |
| Buckingham Strategic Partners | 5,564 | $596.8K | 0.01% | +455+8.9% | Added |
| Neo Ivy Capital Management | 5,770 | $601.2K | 0.15% | −3,970−40.8% | Reduced |
| Aviva PLC | 5,786 | $602.9K | 0.00% | −2,410−29.4% | Reduced |
| M.E. Allison & Co., Inc. | 5,897 | $614.5K | 0.43% | 00.0% | Unchanged |
| XTX Topco Ltd | 6,221 | $648.2K | 0.03% | +1,750+39.1% | Added |
| FORA Capital, LLC | 6,256 | $651.9K | 0.12% | +6,256 | New |
| Wolverine Trading, LLC | 6,284 | $653.5K | 0.01% | −1,238−16.5% | Reduced |
| TCG Advisory Services, LLC | 6,281 | $654.5K | 0.02% | −19−0.3% | Reduced |
| Lido Advisors, LLC | 6,296 | $656.0K | 0.00% | +1,146+22.3% | Added |
| Greenwood Capital Associates LLC | 6,361 | $662.8K | 0.08% | −2,857−31.0% | Reduced |
| Verition Fund Management LLC | 6,397 | $666.6K | 0.00% | −1,573−19.7% | Reduced |
| CI Private Wealth, LLC | 6,405 | $667.4K | 0.00% | +1,911+42.5% | Added |
| Crossmark Global Holdings, Inc. | 6,521 | $679.5K | 0.01% | −200−3.0% | Reduced |
| Equitable Holdings, Inc. | 6,657 | $693.7K | 0.01% | +6,657 | New |
| Brinker Capital Investments, LLC | 6,668 | $694.8K | 0.01% | +1,995+42.7% | Added |
| RSM US Wealth Management LLC | 6,696 | $697.7K | 0.01% | −2,624−28.2% | Reduced |
| Private Advisor Group, LLC | 6,727 | $701.0K | 0.00% | +320+5.0% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 6,954 | $724.6K | 0.00% | +6,954 | New |
| Yorktown Management & Research Co Inc | 7,000 | $729.4K | 0.58% | 00.0% | Unchanged |
| Kerr Financial Planning Corp | 7,950 | $741.8K | 1.05% | +7,950 | New |
| Atria Investments LLC | 7,270 | $757.5K | 0.01% | −1,268−14.9% | Reduced |
| Integrated Advisors Network LLC | 7,309 | $761.6K | 0.03% | +30.0% | Added |
| Financiere des Professionnels - Fonds d,investissement inc. | 7,317 | $762.4K | 0.04% | 00.0% | Unchanged |
| MML Investors Services, LLC | 7,334 | $764.2K | 0.00% | +580+8.6% | Added |
| Advisors Asset Management, Inc. | 7,362 | $767.1K | 0.01% | +34+0.5% | Added |
| Amundi | 7,611 | $768.7K | 0.00% | 00.0% | Unchanged |
| Oak Grove Capital LLC | 7,500 | $781.5K | 0.17% | −600−7.4% | Reduced |
| Beacon Pointe Advisors, LLC | 7,500 | $781.5K | 0.01% | +7,500 | New |
| GTS Securities LLC | 7,521 | $783.7K | 0.03% | +7,521 | New |
| Keebeck Wealth Management, LLC | 7,607 | $792.6K | 0.09% | −245−3.1% | Reduced |
| Norden Group LLC | 7,655 | $797.7K | 0.08% | +208+2.8% | Added |
| Mercer Global Advisors Inc | 7,759 | $808.4K | 0.00% | +1,295+20.0% | Added |
| China Universal Asset Management Co., Ltd. | 8,000 | $833.6K | 0.07% | +8,000 | New |
| Unique Wealth Strategies, LLC | 8,025 | $836.2K | 0.33% | +8,025 | New |
| Securian Asset Management, Inc | 8,058 | $839.6K | 0.02% | −122−1.5% | Reduced |
| Sanctuary Advisors, LLC | 8,073 | $841.2K | 0.00% | −1,220−13.1% | Reduced |
| SRS Capital Advisors, Inc. | 8,500 | $885.7K | 0.01% | +8,405+8,847.4% | Added |
| Wealth Enhancement Advisory Services, LLC | 9,363 | $906.7K | 0.00% | +187+2.0% | Added |
| Nations Financial Group Inc, | 8,878 | $925.1K | 0.06% | −209−2.3% | Reduced |
| Evergreen Capital Management LLC | 8,905 | $927.9K | 0.02% | +1,633+22.5% | Added |
| Harbor Capital Advisors, Inc. | 9,250 | $964.0K | 0.07% | −55,190−85.6% | Reduced |
| Group One Trading, L.P. | 9,334 | $972.6K | 0.03% | +9,334 | New |
| Calamos Advisors LLC | 9,342 | $973.4K | 0.00% | +9,342 | New |
| Profund Advisors LLC | 9,840 | $1.03M | 0.03% | +374+4.0% | Added |
| Harvest Fund Management Co., Ltd | 9,888 | $1.03M | 0.04% | +9,888 | New |
| Portside Wealth Group, LLC | 10,218 | $1.06M | 0.15% | +1,329+15.0% | Added |
| Eventide Asset Management, LLC | 10,330 | $1.08M | 0.02% | +10,330 | New |
| Susquehanna International Group, LLP | 10,349 | $1.08M | 0.00% | −133,367−92.8% | Reduced |
| Hussman Strategic Advisors, Inc. | 10,500 | $1.09M | 0.24% | +10,500 | New |
| Public Employees Retirement Association of Colorado | 10,766 | $1.12M | 0.00% | 00.0% | Unchanged |
| Bokf, NA | 10,822 | $1.13M | 0.02% | +58+0.5% | Added |
| Baader Bank INC | 11,042 | $1.15M | 0.10% | +11,042 | New |
| Bailard, Inc. | 11,090 | $1.16M | 0.03% | −11,518−50.9% | Reduced |
| CIBC Bancorp USA Inc. | 11,510 | $1.20M | 0.01% | +11,510 | New |
| BNC Wealth Management, LLC | 11,568 | $1.21M | 0.30% | −1,000−8.0% | Reduced |
| State of Alaska, Department of Revenue | 11,575 | $1.21M | 0.01% | −500−4.1% | Reduced |
| Inceptionr LLC | 11,662 | $1.22M | 0.29% | +3,053+35.5% | Added |
| Gibbs Wealth Management | 11,664 | $1.22M | 0.27% | −2,261−16.2% | Reduced |
| Independent Financial Group, LLC | 11,731 | $1.22M | 0.03% | +5,231+80.5% | Added |
| Diversify Advisory Services, LLC | 11,777 | $1.25M | 0.04% | −2,507−17.6% | Reduced |
| The PNC Financial Services Group, Inc. | 12,007 | $1.25M | 0.00% | −3,119−20.6% | Reduced |
| Bank of Montreal | 12,039 | $1.25M | 0.00% | −1,959−14.0% | Reduced |
| Virginia Retirement Systems Et Al | 12,160 | $1.27M | 0.01% | −800−6.2% | Reduced |
| Legato Capital Management LLC | 12,451 | $1.30M | 0.14% | +12,451 | New |
| HSBC Holdings PLC | 12,701 | $1.32M | 0.00% | −69,233−84.5% | Reduced |
| Commonwealth Equity Services, LLC | 12,749 | $1.33M | 0.00% | +705+5.9% | Added |
| US Bancorp | 12,751 | $1.33M | 0.00% | −731−5.4% | Reduced |
| Alliance Wealth Advisors, LLC | 12,935 | $1.35M | 0.32% | +754+6.2% | Added |
| OP Asset Management Ltd | 13,883 | $1.45M | 0.02% | −1,586−10.3% | Reduced |
| Guggenheim Capital LLC | 14,351 | $1.50M | 0.01% | −2,427−14.5% | Reduced |
| Quadrant Capital Group LLC | 14,789 | $1.54M | 0.05% | +9+0.1% | Added |
| CWM, LLC | 14,844 | $1.55M | 0.00% | −1,423−8.7% | Reduced |
| First Citizens Bank & Trust Co | 14,890 | $1.55M | 0.03% | +1,299+9.6% | Added |
| Pictet Asset Management Holding SA | 14,905 | $1.55M | 0.00% | −2,843−16.0% | Reduced |
| Credit Agricole S A | 15,114 | $1.57M | 0.01% | +15,114 | New |
| Xponance, Inc. | 15,305 | $1.59M | 0.01% | −163−1.1% | Reduced |
| Kovitz Investment Group Partners, LLC | 15,717 | $1.64M | 0.01% | −1,002−6.0% | Reduced |
| Cinctive Capital Management LP | 16,315 | $1.70M | 0.08% | −49,362−75.2% | Reduced |
| Toroso Investments, LLC | 16,334 | $1.70M | 0.01% | +4,682+40.2% | Added |
| Elo Mutual Pension Insurance Co | 16,462 | $1.72M | 0.03% | +4,682+39.7% | Added |
| Nicholas Investment Partners, LP | 16,630 | $1.73M | 0.13% | +16,630 | New |