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 |
|---|---|---|---|---|---|
| Great West Life Assurance Co | 82,243 | $8.55M | 0.01% | −64−0.1% | Reduced |
| GF Fund Management Co. Ltd. | 85,293 | $8.89M | 0.16% | +85,293 | New |
| D. E. Shaw & Co., Inc. | 86,103 | $8.97M | 0.01% | +33,571+63.9% | Added |
| Creative Planning | 86,598 | $9.02M | 0.01% | +16,373+23.3% | Added |
| EAM Investors, LLC | 89,201 | $9.14M | 1.05% | +89,201 | New |
| Envestnet Asset Management Inc | 93,124 | $9.70M | 0.00% | −6,357−6.4% | Reduced |
| Bessemer Group Inc | 93,719 | $9.77M | 0.01% | +93,256+20,141.7% | Added |
| Assenagon Asset Management S.A. | 94,654 | $9.86M | 0.01% | −786,908−89.3% | Reduced |
| LPL Financial LLC | 100,601 | $10.5M | 0.00% | +13,418+15.4% | Added |
| Danske Bank A/S | 101,058 | $10.5M | 0.03% | +71,199+238.5% | Added |
| California State Teachers Retirement System | 101,119 | $10.5M | 0.01% | +1,567+1.6% | Added |
| Tairen Capital Ltd | 103,073 | $10.7M | 1.16% | +103,073 | New |
| Renaissance Group LLC | 108,467 | $11.3M | 0.43% | −13,126−10.8% | Reduced |
| Federated Hermes, Inc. | 109,841 | $11.4M | 0.02% | +99,814+995.5% | Added |
| Castleark Management LLC | 110,838 | $11.5M | 0.32% | −3,862−3.4% | Reduced |
| Hillsdale Investment Management Inc. | 112,700 | $11.7M | 0.35% | +9,070+8.8% | Added |
| State of Wisconsin Investment Board | 114,994 | $12.0M | 0.03% | +13,999+13.9% | Added |
| Manufacturers Life Insurance Company, The | 115,370 | $12.0M | 0.01% | −5,839−4.8% | Reduced |
| Assetmark, Inc | 121,149 | $12.6M | 0.03% | −4,407−3.5% | Reduced |
| Algert Global LLC | 122,387 | $12.8M | 0.21% | −48,457−28.4% | Reduced |
| New York State Common Retirement Fund | 125,713 | $13.1M | 0.02% | −81,526−39.3% | Reduced |
| Deutsche Bank AG | 125,944 | $13.1M | 0.00% | −1,862−1.5% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 129,676 | $13.5M | 0.04% | +120,549+1,320.8% | Added |
| Retirement Systems of Alabama | 130,088 | $13.6M | 0.05% | −1,195−0.9% | Reduced |
| Man Group plc | 134,375 | $14.0M | 0.03% | −6,917−4.9% | Reduced |
| Nordea Investment Management AB | 139,430 | $14.7M | 0.01% | +70,314+101.7% | Added |
| Mutual of America Capital Management LLC | 141,874 | $14.8M | 0.16% | −9,980−6.6% | Reduced |
| Schroder Investment Management Group | 143,093 | $14.9M | 0.01% | +12,472+9.5% | Added |
| Russell Investments Group, Ltd. | 148,271 | $15.4M | 0.02% | +17,093+13.0% | Added |
| Osterweis Capital Management Inc | 151,560 | $15.8M | 0.71% | −132,850−46.7% | Reduced |
| Penn Capital Management Co Inc | 151,825 | $15.9M | 1.22% | −134,438−47.0% | Reduced |
| Van Eck Associates Corp | 152,512 | $15.9M | 0.01% | +39,148+34.5% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 152,533 | $15.9M | 0.03% | −21,685−12.4% | Reduced |
| Fisher Asset Management, LLC | 152,882 | $15.9M | 0.01% | +152,882 | New |
| HighTower Advisors, LLC | 154,029 | $16.0M | 0.02% | −64,291−29.4% | Reduced |
| DekaBank Deutsche Girozentrale | 154,173 | $16.1M | 0.03% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 161,128 | $16.8M | 0.03% | +93,072+136.8% | Added |
| BNP Paribas Arbitrage, SA | 165,311 | $17.2M | 0.01% | −44,019−21.0% | Reduced |
| CloudAlpha Capital Management Limited/Hong Kong | 165,800 | $17.3M | 1.55% | +165,800 | New |
| Point72 Asset Management, L.P. | 166,667 | $17.4M | 0.04% | +166,667 | New |
| Arrowstreet Capital, Limited Partnership | 173,353 | $18.1M | 0.01% | +173,353 | New |
| Bridgewater Associates, LP | 175,114 | $18.2M | 0.07% | −51,755−22.8% | Reduced |
| Wells Fargo & Company | 180,980 | $18.9M | 0.00% | +10,341+6.1% | Added |
| Glenmede Investment Management, LP | 188,187 | $19.6M | 0.09% | −109,253−36.7% | Reduced |
| Jane Street Group, LLC | 193,150 | $20.1M | 0.02% | +84,229+77.3% | Added |
| Stephens Investment Management Group LLC | 193,391 | $20.2M | 0.26% | −1,732−0.9% | Reduced |
| California Public Employees Retirement System | 196,091 | $20.4M | 0.01% | +10,208+5.5% | Added |
| Millennium Management LLC | 197,232 | $20.6M | 0.02% | −221,280−52.9% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 200,000 | $20.8M | 0.04% | +200,000 | New |
| First Trust Advisors LP | 200,545 | $20.9M | 0.02% | +51,215+34.3% | Added |
| Swiss National Bank | 208,200 | $21.7M | 0.01% | +3,000+1.5% | Added |
| Advisor Group Holdings, Inc. | 224,655 | $22.4M | 0.03% | +213,035+1,833.3% | Added |
| Legal & General Group Plc | 219,714 | $22.9M | 0.01% | −10,483−4.6% | Reduced |
| Prudential Financial Inc | 221,021 | $23.0M | 0.03% | −42,350−16.1% | Reduced |
| Schwartz Investment Counsel Inc | 230,337 | $24.0M | 0.81% | −150,000−39.4% | Reduced |
| Westwood Holdings Group Inc. | 235,057 | $24.5M | 0.17% | −1,502,005−86.5% | Reduced |
| Granahan Investment Management Inc | 238,443 | $24.8M | 1.02% | +108,362+83.3% | Added |
| MetLife Investment Management | 245,812 | $25.6M | 0.12% | −144,630−37.0% | Reduced |
| Segall Bryant & Hamill, LLC | 248,079 | $25.8M | 0.34% | −14,498−5.5% | Reduced |
| UBS Asset Management Americas Inc | 253,906 | $26.5M | 0.01% | −168,899−39.9% | Reduced |
| Canada Pension Plan Investment Board | 254,600 | $26.5M | 0.02% | +113,100+79.9% | Added |
| SEI Investments Co | 280,553 | $29.2M | 0.03% | −126,803−31.1% | Reduced |
| William Blair Investment Management, LLC | 291,182 | $30.3M | 0.08% | +291,182 | New |
| Macquarie Group Ltd | 292,205 | $30.4M | 0.04% | +36,112+14.1% | Added |
| WCM Investment Management, LLC | 298,880 | $31.1M | 0.06% | −118,021−28.3% | Reduced |
| Lazard Asset Management LLC | 298,928 | $31.1M | 0.04% | +84,491+39.4% | Added |
| Rhumbline Advisers | 344,387 | $35.9M | 0.03% | −7,641−2.2% | Reduced |
| Citigroup Inc | 370,341 | $38.6M | 0.03% | +220,207+146.7% | Added |
| Caisse de Depot Et Placement du Quebec | 380,604 | $39.7M | 0.07% | +367,225+2,744.8% | Added |
| Janus Henderson Group PLC | 384,004 | $40.0M | 0.02% | +170,601+79.9% | Added |
| Emerald Mutual Fund Advisers Trust | 391,215 | $40.8M | 2.10% | −24,907−6.0% | Reduced |
| Panagora Asset Management Inc | 438,117 | $45.7M | 0.18% | −39,242−8.2% | Reduced |
| Ameriprise Financial Inc | 460,104 | $47.9M | 0.01% | +208,186+82.6% | Added |
| Silvercrest Asset Management Group LLC | 464,889 | $48.4M | 0.32% | −15,559−3.2% | Reduced |
| Franklin Resources Inc | 472,349 | $49.2M | 0.01% | +44,400+10.4% | Added |
| Principal Financial Group Inc | 472,974 | $49.3M | 0.02% | −43,049−8.3% | Reduced |
| Westfield Capital Management Co LP | 484,465 | $50.5M | 0.21% | −477,954−49.7% | Reduced |
| Allspring Global Investments Holdings, LLC | 495,453 | $51.1M | 0.08% | +427,297+626.9% | Added |
| Oberweis Asset Management Inc | 507,899 | $52.9M | 2.03% | +2,119+0.4% | Added |
| AQR Capital Management LLC | 547,604 | $57.1M | 0.04% | −154,142−22.0% | Reduced |
| UBS Group AG | 565,805 | $59.0M | 0.01% | +425,364+302.9% | Added |
| Loomis Sayles & Co L P | 610,153 | $63.6M | 0.08% | +389,925+177.1% | Added |
| Analog Century Management LP | 631,343 | $65.8M | 3.53% | −195,759−23.7% | Reduced |
| Emerald Advisers, LLC | 637,754 | $66.5M | 2.13% | −72,369−10.2% | Reduced |
| T. Rowe Price Investment Management, Inc. | 729,047 | $76.0M | 0.05% | +416,095+133.0% | Added |
| Lord, Abbett & Co. LLC | 746,676 | $77.8M | 0.23% | +428,354+134.6% | Added |
| Wellington Management Group LLP | 750,446 | $78.2M | 0.01% | −456,320−37.8% | Reduced |
| Voya Investment Management LLC | 768,538 | $80.1M | 0.08% | −430,835−35.9% | Reduced |
| Hood River Capital Management LLC | 838,440 | $87.4M | 1.03% | −117,160−12.3% | Reduced |
| Barclays PLC | 894,906 | $93.2M | 0.03% | +578,839+183.1% | Added |
| Rafferty Asset Management, LLC | 901,750 | $94.0M | 0.30% | +901,750 | New |
| Morgan Stanley | 1,065,804 | $111.1M | 0.01% | −97,455−8.4% | Reduced |
| Goldman Sachs Group Inc | 1,187,133 | $123.7M | 0.02% | +527,524+80.0% | Added |
| Raymond James Financial Inc | 1,190,320 | $124.0M | 0.04% | −181,789−13.2% | Reduced |
| Nuveen, LLC | 1,283,125 | $133.7M | 0.04% | +147,455+13.0% | Added |
| Charles Schwab Investment Management Inc | 1,338,914 | $139.5M | 0.02% | +51,879+4.0% | Added |
| Congress Asset Management Co | 1,347,185 | $140.4M | 0.93% | +70,259+5.5% | Added |
| FMR LLC | 1,373,524 | $143.1M | 0.01% | +1,035,263+306.1% | Added |
| Northern Trust Corp | 1,385,874 | $144.4M | 0.02% | −7,812−0.6% | Reduced |
| Neuberger Berman Group LLC | 1,482,008 | $154.4M | 0.11% | +133,970+9.9% | Added |