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, Q1 2025
Institutional positions in Rambus Inc as of Mar 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
- 413
- +24 vs. Q4 2024
- Shares held
- 96.7M
- +4.72M (+5.1%) vs. Q4 2024
- Total value
- $5.01B
- +$145.7M (+3.0%) vs. Q4 2024
- New holders
- 78
- 159 more added
- Sold out
- 54
- 131 more reduced
6 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vident Advisory, LLC | 73,268 | $3.79M | 0.06% | −446−0.6% | Reduced |
| Ellsworth Advisors, LLC | 74,709 | $3.87M | 1.01% | +74,709 | New |
| Harbor Capital Advisors, Inc. | 76,619 | $3.97M | 0.18% | −9,295−10.8% | Reduced |
| Bridgewater Associates, LP | 78,079 | $4.04M | 0.02% | +70,934+992.8% | Added |
| LPL Financial LLC | 80,016 | $4.14M | 0.00% | +16,652+26.3% | Added |
| Intech Investment Management LLC | 80,473 | $4.17M | 0.04% | +22,677+39.2% | Added |
| BNP Paribas Arbitrage, SA | 80,670 | $4.18M | 0.00% | +23,449+41.0% | Added |
| Thornburg Investment Management Inc | 81,120 | $4.20M | 0.06% | −6,964−7.9% | Reduced |
| Capital Fund Management S.A. | 81,311 | $4.21M | 0.05% | −165,682−67.1% | Reduced |
| Great West Life Assurance Co | 83,555 | $4.33M | 0.01% | −8,356−9.1% | Reduced |
| Envestnet Asset Management Inc | 84,263 | $4.36M | 0.00% | +10,325+14.0% | Added |
| Renaissance Group LLC | 93,665 | $4.85M | 0.21% | +17,776+23.4% | Added |
| Apis Capital Advisors, LLC | 94,000 | $4.87M | 2.35% | +94,000 | New |
| TownSquare Capital, LLC | 98,403 | $5.09M | 0.05% | +52,013+112.1% | Added |
| California State Teachers Retirement System | 99,515 | $5.15M | 0.01% | −1,128−1.1% | Reduced |
| Fred Alger Management, LLC | 99,820 | $5.17M | 0.03% | +37,312+59.7% | Added |
| Comerica Bank | 101,012 | $5.23M | 0.02% | −19,645−16.3% | Reduced |
| State of Wisconsin Investment Board | 102,871 | $5.33M | 0.01% | +4,401+4.5% | Added |
| Lazard Asset Management LLC | 108,577 | $5.62M | 0.01% | +39,408+57.0% | Added |
| Polen Capital Management LLC | 109,117 | $5.65M | 0.02% | +9,858+9.9% | Added |
| Wells Fargo & Company | 109,342 | $5.66M | 0.00% | +11,409+11.6% | Added |
| Citigroup Inc | 111,954 | $5.80M | 0.00% | −5,246−4.5% | Reduced |
| Assetmark, Inc | 114,456 | $5.93M | 0.02% | +9,510+9.1% | Added |
| Castleark Management LLC | 118,100 | $6.11M | 0.21% | −21,790−15.6% | Reduced |
| Natixis Advisors, L.P. | 122,479 | $6.34M | 0.01% | −36,204−22.8% | Reduced |
| UBS Group AG | 122,676 | $6.35M | 0.00% | −318−0.3% | Reduced |
| Manufacturers Life Insurance Company, The | 126,053 | $6.53M | 0.01% | −2,098−1.6% | Reduced |
| Van Eck Associates Corp | 128,303 | $6.64M | 0.01% | +22,139+20.9% | Added |
| Granahan Investment Management Inc | 128,682 | $6.66M | 0.33% | +46,062+55.8% | Added |
| First Trust Advisors LP | 128,729 | $6.66M | 0.01% | +42,120+48.6% | Added |
| Retirement Systems of Alabama | 129,715 | $6.72M | 0.03% | +128+0.1% | Added |
| Susquehanna International Group, LLP | 131,497 | $6.81M | 0.01% | +85,824+187.9% | Added |
| Russell Investments Group, Ltd. | 140,157 | $7.26M | 0.01% | +60,984+77.0% | Added |
| Canada Pension Plan Investment Board | 140,700 | $7.28M | 0.01% | −95,000−40.3% | Reduced |
| Mutual of America Capital Management LLC | 144,922 | $7.50M | 0.09% | −1,218−0.8% | Reduced |
| DekaBank Deutsche Girozentrale | 154,173 | $8.19M | 0.02% | 00.0% | Unchanged |
| Corebridge Financial, Inc. | 169,347 | $8.77M | 0.05% | −3,630−2.1% | Reduced |
| Algert Global LLC | 171,296 | $8.87M | 0.22% | −121,296−41.5% | Reduced |
| California Public Employees Retirement System | 172,384 | $8.93M | 0.01% | −1,352−0.8% | Reduced |
| Assenagon Asset Management S.A. | 178,858 | $9.26M | 0.02% | −581,356−76.5% | Reduced |
| Royce & Associates LP | 179,907 | $9.31M | 0.10% | +59,772+49.8% | Added |
| Barclays PLC | 180,435 | $9.34M | 0.00% | −83,018−31.5% | Reduced |
| Congress Wealth Management LLC | 182,656 | $9.46M | 0.11% | +61,923+51.3% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 182,940 | $9.47M | 0.02% | +17,282+10.4% | Added |
| Deutsche Bank AG | 192,826 | $9.98M | 0.00% | +53,824+38.7% | Added |
| HighTower Advisors, LLC | 193,544 | $10.0M | 0.01% | −43,673−18.4% | Reduced |
| Stephens Investment Management Group LLC | 193,661 | $10.0M | 0.14% | +2,804+1.5% | Added |
| Janus Henderson Group PLC | 190,318 | $10.2M | 0.01% | −152,862−44.5% | Reduced |
| Royal Bank of Canada | 201,722 | $10.4M | 0.00% | −42,154−17.3% | Reduced |
| Schonfeld Strategic Advisors LLC | 203,645 | $10.5M | 0.07% | +203,645 | New |
| Swiss National Bank | 206,400 | $10.7M | 0.01% | −5,400−2.5% | Reduced |
| Alliancebernstein L.P. | 227,798 | $11.8M | 0.00% | −5,838−2.5% | Reduced |
| SummitTX Capital, L.P. | 228,164 | $11.8M | 0.52% | +228,164 | New |
| Legal & General Group Plc | 229,927 | $11.9M | 0.00% | −3,909−1.7% | Reduced |
| AQR Capital Management LLC | 239,630 | $12.2M | 0.01% | −80,101−25.1% | Reduced |
| Millennium Management LLC | 236,095 | $12.2M | 0.01% | −358,960−60.3% | Reduced |
| Qube Research & Technologies Ltd | 244,888 | $12.7M | 0.02% | +63,767+35.2% | Added |
| Penn Capital Management Co Inc | 246,829 | $12.8M | 1.25% | +31,966+14.9% | Added |
| Macquarie Group Ltd | 255,480 | $13.2M | 0.02% | +15,912+6.6% | Added |
| Prudential Financial Inc | 257,256 | $13.3M | 0.02% | −31,985−11.1% | Reduced |
| Ameriprise Financial Inc | 280,065 | $14.5M | 0.00% | +30,935+12.4% | Added |
| Segall Bryant & Hamill, LLC | 285,762 | $14.8M | 0.23% | +124,721+77.4% | Added |
| Osterweis Capital Management Inc | 286,305 | $14.8M | 0.73% | +109,560+62.0% | Added |
| Two Sigma Advisers, LP | 293,800 | $15.2M | 0.03% | −141,500−32.5% | Reduced |
| Glenmede Trust Co NA | 301,612 | $15.6M | 0.08% | −8,130−2.6% | Reduced |
| Emerald Mutual Fund Advisers Trust | 306,106 | $15.8M | 1.12% | −50,852−14.2% | Reduced |
| UBS Asset Management Americas Inc | 309,512 | $16.0M | 0.00% | +19,120+6.6% | Added |
| Two Sigma Investments, LP | 313,174 | $16.2M | 0.04% | −216,800−40.9% | Reduced |
| Rhumbline Advisers | 333,069 | $17.2M | 0.02% | +1,103+0.3% | Added |
| SEI Investments Co | 337,225 | $17.5M | 0.02% | +31,153+10.2% | Added |
| Lord, Abbett & Co. LLC | 341,986 | $17.7M | 0.06% | +341,986 | New |
| Jane Street Group, LLC | 348,291 | $18.0M | 0.03% | +123,670+55.1% | Added |
| New York State Common Retirement Fund | 352,312 | $18.2M | 0.03% | +169,852+93.1% | Added |
| MetLife Investment Management | 360,635 | $18.7M | 0.10% | +238,340+194.9% | Added |
| Franklin Resources Inc | 374,380 | $19.4M | 0.01% | −31,883−7.8% | Reduced |
| Schwartz Investment Counsel Inc | 380,337 | $19.7M | 0.68% | +380,337 | New |
| Bank of America Corp | 396,717 | $20.5M | 0.00% | −18,600−4.5% | Reduced |
| WCM Investment Management, LLC | 388,655 | $20.9M | 0.05% | +2,128+0.6% | Added |
| Panagora Asset Management Inc | 460,438 | $23.8M | 0.12% | +22,759+5.2% | Added |
| SG Americas Securities, LLC | 490,547 | $25.4M | 0.09% | −61,626−11.2% | Reduced |
| Principal Financial Group Inc | 506,713 | $26.2M | 0.01% | +176,579+53.5% | Added |
| Oberweis Asset Management Inc | 507,350 | $26.3M | 1.31% | +97,950+23.9% | Added |
| Silvercrest Asset Management Group LLC | 513,928 | $26.6M | 0.19% | −2,205−0.4% | Reduced |
| Emerald Advisers, LLC | 530,702 | $27.5M | 1.24% | −13,127−2.4% | Reduced |
| Vaughan Nelson Investment Management, L.P. | 562,813 | $29.1M | 0.29% | −172,975−23.5% | Reduced |
| Park West Asset Management LLC | 589,150 | $30.5M | 2.49% | +589,150 | New |
| Goldman Sachs Group Inc | 672,978 | $34.8M | 0.01% | −375,862−35.8% | Reduced |
| Analog Century Management LP | 680,113 | $35.2M | 2.85% | −145,175−17.6% | Reduced |
| Morgan Stanley | 938,032 | $48.6M | 0.00% | +23,282+2.5% | Added |
| Raymond James Financial Inc | 939,712 | $48.7M | 0.02% | −34,572−3.5% | Reduced |
| Hood River Capital Management LLC | 944,894 | $48.9M | 0.83% | +944,894 | New |
| Westfield Capital Management Co LP | 1,089,081 | $56.4M | 0.27% | −300,457−21.6% | Reduced |
| Nuveen, LLC | 1,102,549 | $57.1M | 0.02% | +1,102,549 | New |
| Voya Investment Management LLC | 1,109,115 | $57.4M | 0.06% | −15,326−1.4% | Reduced |
| EdgePoint Investment Group Inc. | 1,169,194 | $60.5M | 0.49% | +1,169,194 | New |
| Wellington Management Group LLP | 1,194,046 | $61.8M | 0.01% | −54,399−4.4% | Reduced |
| Congress Asset Management Co | 1,199,564 | $62.1M | 0.46% | +333,538+38.5% | Added |
| Westwood Holdings Group Inc. | 1,232,210 | $63.8M | 0.48% | +104,356+9.3% | Added |
| Charles Schwab Investment Management Inc | 1,256,346 | $65.0M | 0.01% | +6,600+0.5% | Added |
| Neuberger Berman Group LLC | 1,282,168 | $66.7M | 0.06% | −376,196−22.7% | Reduced |