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, 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 | 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, 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 |
|---|---|---|---|---|---|
| Bank of America Corp | 1,550,665 | $161.6M | 0.01% | +1,026,776+196.0% | Added |
| Bank of New York Mellon Corp | 1,598,338 | $166.5M | 0.03% | −421,166−20.9% | Reduced |
| Swedbank AB | 1,700,000 | $177.1M | 0.18% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 1,822,030 | $189.9M | 0.06% | +1,551,159+572.7% | Added |
| Dimensional Fund Advisors LP | 1,928,697 | $201.0M | 0.04% | +11,024+0.6% | Added |
| Invesco Ltd. | 2,432,032 | $253.4M | 0.04% | +109,908+4.7% | Added |
| JPMorgan Chase & Co | 2,556,838 | $266.4M | 0.02% | −623,538−19.6% | Reduced |
| EdgePoint Investment Group Inc. | 2,682,956 | $279.6M | 2.09% | −104,371−3.7% | Reduced |
| Geode Capital Management, LLC | 2,748,501 | $286.4M | 0.02% | +60,810+2.3% | Added |
| State Street Corp | 4,389,985 | $457.4M | 0.02% | −119,012−2.6% | Reduced |
| Price T Rowe Associates Inc | 5,245,344 | $546.6M | 0.06% | +551,954+11.8% | Added |
| Vanguard Group Inc | 12,701,773 | $1.32B | 0.02% | +140,948+1.1% | Added |
| BlackRock, Inc. | 15,808,693 | $1.65B | 0.03% | +808,613+5.4% | Added |
| Park West Asset Management LLC | 0 | $0 | 0.00% | −660,000−100.0% | Sold out |
| Apis Capital Advisors, LLC | 0 | $0 | 0.00% | −112,000−100.0% | Sold out |
| Stanley-Laman Group, Ltd. | 0 | $0 | 0.00% | −103,312−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −100,170−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −99,200−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −71,404−100.0% | Sold out |
| Alberta Investment Management Corp | 0 | $0 | 0.00% | −64,600−100.0% | Sold out |
| Royce & Associates LP | 0 | $0 | 0.00% | −64,175−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −43,444−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −43,120−100.0% | Sold out |
| PEAK6 LLC | 0 | $0 | 0.00% | −40,887−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −36,439−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −28,720−100.0% | Sold out |
| AXA S.A. | 0 | $0 | 0.00% | −25,227−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −24,086−100.0% | Sold out |
| DnB Asset Management AS | 0 | $0 | 0.00% | −23,063−100.0% | Sold out |
| Polen Capital Management LLC | 0 | $0 | 0.00% | −20,135−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −19,796−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −19,142−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −16,033−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −14,285−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −13,734−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −10,689−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −9,515−100.0% | Sold out |
| TownSquare Capital, LLC | 0 | $0 | 0.00% | −7,727−100.0% | Sold out |
| Great Valley Advisor Group, Inc. | 0 | $0 | 0.00% | −7,200−100.0% | Sold out |
| Counterpoint Mutual Funds LLC | 0 | $0 | 0.00% | −6,041−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −5,960−100.0% | Sold out |
| Dakota Wealth Management | 0 | $0 | 0.00% | −5,681−100.0% | Sold out |
| MQS Management LLC | 0 | $0 | 0.00% | −5,612−100.0% | Sold out |
| Readystate Asset Management LP | 0 | $0 | 0.00% | −5,275−100.0% | Sold out |
| Prosperity Wealth Management, Inc. | 0 | $0 | 0.00% | −5,245−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −5,170−100.0% | Sold out |
| ZWJ Investment Counsel Inc | 0 | $0 | 0.00% | −4,102−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −3,694−100.0% | Sold out |
| Principal Street Partners, LLC | 0 | $0 | 0.00% | −3,488−100.0% | Sold out |
| New Insight Wealth Advisors | 0 | $0 | 0.00% | −3,236−100.0% | Sold out |
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −3,194−100.0% | Sold out |
| Northwest Capital Management Inc | 0 | $0 | 0.00% | −1,700−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −1,592−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −1,513−100.0% | Sold out |
| NBC Securities, Inc. | 0 | $0 | 0.00% | −1,187−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −1,051−100.0% | Sold out |
| Meeder Asset Management Inc | 0 | $0 | 0.00% | −679−100.0% | Sold out |
| Riggs Asset Managment Co. Inc. | 0 | $0 | 0.00% | −421−100.0% | Sold out |
| Kestra Investment Management, LLC | 0 | $0 | 0.00% | −266−100.0% | Sold out |
| Annis Gardner Whiting Capital Advisors, LLC | 0 | $0 | 0.00% | −215−100.0% | Sold out |
| Fairway Wealth LLC | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −168−100.0% | Sold out |
| Kozak & Associates, Inc. | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Ameritas Advisory Services, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Curio Wealth, LLC | 0 | $0 | 0.00% | −52−100.0% | Sold out |
| NewSquare Capital LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Sound Income Strategies, LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Valley National Advisers Inc | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −14−100.0% | Sold out |
| South State Corp. | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Arlington Trust Co LLC | 0 | $0 | 0.00% | −10−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| Raleigh Capital Management Inc. | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| WealthTrak Capital Management LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Norges Bank | – | – | – | – | Not filed |
| Congress Wealth Management LLC | – | – | – | – | Not filed |
| Scott Marsh Financial, LLC | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |
| First Horizon Advisors, Inc. | – | – | – | – | Not filed |
| Legacy Investment Solutions, LLC | – | – | – | – | Not filed |
| Capital A Wealth Management, LLC | – | – | – | – | Not filed |
| Parkworth Wealth Management, Inc. | – | – | – | – | Not filed |