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, 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 | 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, 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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 14,236,566 | $737.1M | 0.02% | +97,504+0.7% | Added |
| Vanguard Group Inc | 12,442,412 | $644.2M | 0.01% | −152,567−1.2% | Reduced |
| Price T Rowe Associates Inc | 8,746,856 | $452.9M | 0.06% | +3,297,728+60.5% | Added |
| State Street Corp | 4,580,557 | $237.2M | 0.01% | −156,858−3.3% | Reduced |
| Invesco Ltd. | 4,532,026 | $234.6M | 0.04% | −467,722−9.4% | Reduced |
| JPMorgan Chase & Co | 3,647,406 | $188.8M | 0.01% | −536,964−12.8% | Reduced |
| Geode Capital Management, LLC | 2,651,947 | $137.3M | 0.01% | +74,762+2.9% | Added |
| Norges Bank | 2,009,726 | $104.1M | 0.01% | +224,484+12.6% | Added |
| Dimensional Fund Advisors LP | 1,868,434 | $96.7M | 0.02% | +134,246+7.7% | Added |
| Bank of New York Mellon Corp | 1,784,251 | $92.4M | 0.02% | −311,723−14.9% | Reduced |
| American Century Companies Inc | 1,424,365 | $73.7M | 0.05% | +248,013+21.1% | Added |
| Northern Trust Corp | 1,420,613 | $73.6M | 0.01% | −42,725−2.9% | Reduced |
| Neuberger Berman Group LLC | 1,282,168 | $66.7M | 0.06% | −376,196−22.7% | Reduced |
| Charles Schwab Investment Management Inc | 1,256,346 | $65.0M | 0.01% | +6,600+0.5% | Added |
| Westwood Holdings Group Inc. | 1,232,210 | $63.8M | 0.48% | +104,356+9.3% | Added |
| Congress Asset Management Co | 1,199,564 | $62.1M | 0.46% | +333,538+38.5% | Added |
| Wellington Management Group LLP | 1,194,046 | $61.8M | 0.01% | −54,399−4.4% | Reduced |
| EdgePoint Investment Group Inc. | 1,169,194 | $60.5M | 0.49% | +1,169,194 | New |
| Voya Investment Management LLC | 1,109,115 | $57.4M | 0.06% | −15,326−1.4% | Reduced |
| Nuveen, LLC | 1,102,549 | $57.1M | 0.02% | +1,102,549 | New |
| Westfield Capital Management Co LP | 1,089,081 | $56.4M | 0.27% | −300,457−21.6% | Reduced |
| Hood River Capital Management LLC | 944,894 | $48.9M | 0.83% | +944,894 | New |
| Raymond James Financial Inc | 939,712 | $48.7M | 0.02% | −34,572−3.5% | Reduced |
| Morgan Stanley | 938,032 | $48.6M | 0.00% | +23,282+2.5% | Added |
| Analog Century Management LP | 680,113 | $35.2M | 2.85% | −145,175−17.6% | Reduced |
| Goldman Sachs Group Inc | 672,978 | $34.8M | 0.01% | −375,862−35.8% | Reduced |
| Park West Asset Management LLC | 589,150 | $30.5M | 2.49% | +589,150 | New |
| Vaughan Nelson Investment Management, L.P. | 562,813 | $29.1M | 0.29% | −172,975−23.5% | Reduced |
| Emerald Advisers, LLC | 530,702 | $27.5M | 1.24% | −13,127−2.4% | Reduced |
| Silvercrest Asset Management Group LLC | 513,928 | $26.6M | 0.19% | −2,205−0.4% | Reduced |
| Oberweis Asset Management Inc | 507,350 | $26.3M | 1.31% | +97,950+23.9% | Added |
| Principal Financial Group Inc | 506,713 | $26.2M | 0.01% | +176,579+53.5% | Added |
| SG Americas Securities, LLC | 490,547 | $25.4M | 0.09% | −61,626−11.2% | Reduced |
| Panagora Asset Management Inc | 460,438 | $23.8M | 0.12% | +22,759+5.2% | Added |
| WCM Investment Management, LLC | 388,655 | $20.9M | 0.05% | +2,128+0.6% | Added |
| Bank of America Corp | 396,717 | $20.5M | 0.00% | −18,600−4.5% | Reduced |
| Schwartz Investment Counsel Inc | 380,337 | $19.7M | 0.68% | +380,337 | New |
| Franklin Resources Inc | 374,380 | $19.4M | 0.01% | −31,883−7.8% | Reduced |
| MetLife Investment Management | 360,635 | $18.7M | 0.10% | +238,340+194.9% | Added |
| New York State Common Retirement Fund | 352,312 | $18.2M | 0.03% | +169,852+93.1% | Added |
| Jane Street Group, LLC | 348,291 | $18.0M | 0.03% | +123,670+55.1% | Added |
| Lord, Abbett & Co. LLC | 341,986 | $17.7M | 0.06% | +341,986 | New |
| SEI Investments Co | 337,225 | $17.5M | 0.02% | +31,153+10.2% | Added |
| Rhumbline Advisers | 333,069 | $17.2M | 0.02% | +1,103+0.3% | Added |
| Two Sigma Investments, LP | 313,174 | $16.2M | 0.04% | −216,800−40.9% | Reduced |
| UBS Asset Management Americas Inc | 309,512 | $16.0M | 0.00% | +19,120+6.6% | Added |
| Emerald Mutual Fund Advisers Trust | 306,106 | $15.8M | 1.12% | −50,852−14.2% | Reduced |
| Glenmede Trust Co NA | 301,612 | $15.6M | 0.08% | −8,130−2.6% | Reduced |
| Two Sigma Advisers, LP | 293,800 | $15.2M | 0.03% | −141,500−32.5% | Reduced |
| Osterweis Capital Management Inc | 286,305 | $14.8M | 0.73% | +109,560+62.0% | Added |
| Segall Bryant & Hamill, LLC | 285,762 | $14.8M | 0.23% | +124,721+77.4% | Added |
| Ameriprise Financial Inc | 280,065 | $14.5M | 0.00% | +30,935+12.4% | Added |
| Prudential Financial Inc | 257,256 | $13.3M | 0.02% | −31,985−11.1% | Reduced |
| Macquarie Group Ltd | 255,480 | $13.2M | 0.02% | +15,912+6.6% | Added |
| Penn Capital Management Co Inc | 246,829 | $12.8M | 1.25% | +31,966+14.9% | Added |
| Qube Research & Technologies Ltd | 244,888 | $12.7M | 0.02% | +63,767+35.2% | Added |
| Millennium Management LLC | 236,095 | $12.2M | 0.01% | −358,960−60.3% | Reduced |
| AQR Capital Management LLC | 239,630 | $12.2M | 0.01% | −80,101−25.1% | Reduced |
| Legal & General Group Plc | 229,927 | $11.9M | 0.00% | −3,909−1.7% | Reduced |
| SummitTX Capital, L.P. | 228,164 | $11.8M | 0.52% | +228,164 | New |
| Alliancebernstein L.P. | 227,798 | $11.8M | 0.00% | −5,838−2.5% | Reduced |
| Swiss National Bank | 206,400 | $10.7M | 0.01% | −5,400−2.5% | Reduced |
| Schonfeld Strategic Advisors LLC | 203,645 | $10.5M | 0.07% | +203,645 | New |
| Royal Bank of Canada | 201,722 | $10.4M | 0.00% | −42,154−17.3% | Reduced |
| Janus Henderson Group PLC | 190,318 | $10.2M | 0.01% | −152,862−44.5% | Reduced |
| Stephens Investment Management Group LLC | 193,661 | $10.0M | 0.14% | +2,804+1.5% | Added |
| HighTower Advisors, LLC | 193,544 | $10.0M | 0.01% | −43,673−18.4% | Reduced |
| Deutsche Bank AG | 192,826 | $9.98M | 0.00% | +53,824+38.7% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 182,940 | $9.47M | 0.02% | +17,282+10.4% | Added |
| Congress Wealth Management LLC | 182,656 | $9.46M | 0.11% | +61,923+51.3% | Added |
| Barclays PLC | 180,435 | $9.34M | 0.00% | −83,018−31.5% | Reduced |
| Royce & Associates LP | 179,907 | $9.31M | 0.10% | +59,772+49.8% | Added |
| Assenagon Asset Management S.A. | 178,858 | $9.26M | 0.02% | −581,356−76.5% | Reduced |
| California Public Employees Retirement System | 172,384 | $8.93M | 0.01% | −1,352−0.8% | Reduced |
| Algert Global LLC | 171,296 | $8.87M | 0.22% | −121,296−41.5% | Reduced |
| Corebridge Financial, Inc. | 169,347 | $8.77M | 0.05% | −3,630−2.1% | Reduced |
| DekaBank Deutsche Girozentrale | 154,173 | $8.19M | 0.02% | 00.0% | Unchanged |
| Mutual of America Capital Management LLC | 144,922 | $7.50M | 0.09% | −1,218−0.8% | Reduced |
| Canada Pension Plan Investment Board | 140,700 | $7.28M | 0.01% | −95,000−40.3% | Reduced |
| Russell Investments Group, Ltd. | 140,157 | $7.26M | 0.01% | +60,984+77.0% | Added |
| Susquehanna International Group, LLP | 131,497 | $6.81M | 0.01% | +85,824+187.9% | Added |
| Retirement Systems of Alabama | 129,715 | $6.72M | 0.03% | +128+0.1% | Added |
| First Trust Advisors LP | 128,729 | $6.66M | 0.01% | +42,120+48.6% | Added |
| Granahan Investment Management Inc | 128,682 | $6.66M | 0.33% | +46,062+55.8% | Added |
| Van Eck Associates Corp | 128,303 | $6.64M | 0.01% | +22,139+20.9% | Added |
| Manufacturers Life Insurance Company, The | 126,053 | $6.53M | 0.01% | −2,098−1.6% | Reduced |
| UBS Group AG | 122,676 | $6.35M | 0.00% | −318−0.3% | Reduced |
| Natixis Advisors, L.P. | 122,479 | $6.34M | 0.01% | −36,204−22.8% | Reduced |
| Castleark Management LLC | 118,100 | $6.11M | 0.21% | −21,790−15.6% | Reduced |
| Assetmark, Inc | 114,456 | $5.93M | 0.02% | +9,510+9.1% | Added |
| Citigroup Inc | 111,954 | $5.80M | 0.00% | −5,246−4.5% | Reduced |
| Wells Fargo & Company | 109,342 | $5.66M | 0.00% | +11,409+11.6% | Added |
| Polen Capital Management LLC | 109,117 | $5.65M | 0.02% | +9,858+9.9% | Added |
| Lazard Asset Management LLC | 108,577 | $5.62M | 0.01% | +39,408+57.0% | Added |
| State of Wisconsin Investment Board | 102,871 | $5.33M | 0.01% | +4,401+4.5% | Added |
| Comerica Bank | 101,012 | $5.23M | 0.02% | −19,645−16.3% | Reduced |
| Fred Alger Management, LLC | 99,820 | $5.17M | 0.03% | +37,312+59.7% | Added |
| California State Teachers Retirement System | 99,515 | $5.15M | 0.01% | −1,128−1.1% | Reduced |
| TownSquare Capital, LLC | 98,403 | $5.09M | 0.05% | +52,013+112.1% | Added |
| Apis Capital Advisors, LLC | 94,000 | $4.87M | 2.35% | +94,000 | New |