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 2023
Institutional positions in Rambus Inc as of Mar 31, 2023. 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
- 337
- +36 vs. Q4 2022
- Shares held
- 93.7M
- +2.10M (+2.3%) vs. Q4 2022
- Total value
- $4.81B
- +$1.55B (+47.4%) vs. Q4 2022
- New holders
- 71
- 91 more added
- Sold out
- 35
- 136 more reduced
2 institutions that held it in Q4 2022 haven't filed for Q1 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2022: 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 2023
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q4 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 17,864,310 | $915.7M | 0.03% | +295,147+1.7% | Added |
| Vanguard Group Inc | 12,669,047 | $649.4M | 0.02% | +188,467+1.5% | Added |
| State Street Corp | 4,562,155 | $233.9M | 0.01% | +206,003+4.7% | Added |
| Ameriprise Financial Inc | 4,238,168 | $217.3M | 0.07% | −651,561−13.3% | Reduced |
| JPMorgan Chase & Co | 3,756,514 | $192.6M | 0.03% | +3,333,307+787.6% | Added |
| Neuberger Berman Group LLC | 3,532,777 | $180.5M | 0.17% | −1,061,824−23.1% | Reduced |
| Dimensional Fund Advisors LP | 2,786,888 | $142.9M | 0.05% | −772,284−21.7% | Reduced |
| Wellington Management Group LLP | 2,466,033 | $126.4M | 0.03% | −266,119−9.7% | Reduced |
| Geode Capital Management, LLC | 2,114,608 | $108.4M | 0.01% | +101,970+5.1% | Added |
| Loomis Sayles & Co L P | 1,995,172 | $102.3M | 0.18% | −474,945−19.2% | Reduced |
| Lord, Abbett & Co. LLC | 1,926,558 | $98.8M | 0.36% | −171,307−8.2% | Reduced |
| Northern Trust Corp | 1,580,721 | $81.0M | 0.02% | −3,223−0.2% | Reduced |
| Westwood Holdings Group Inc. | 1,515,534 | $77.7M | 0.70% | −429,730−22.1% | Reduced |
| Captrust Financial Advisors | 1,345,470 | $68.9M | 0.30% | +56,803+4.4% | Added |
| Hood River Capital Management LLC | 1,198,294 | $61.4M | 1.99% | +48,541+4.2% | Added |
| Silvercrest Asset Management Group LLC | 1,165,340 | $59.7M | 0.45% | −36,572−3.0% | Reduced |
| Vaughan Nelson Investment Management, L.P. | 1,126,550 | $57.7M | 0.71% | −471,420−29.5% | Reduced |
| D. E. Shaw & Co., Inc. | 1,070,599 | $54.9M | 0.09% | −152,948−12.5% | Reduced |
| Nuveen Asset Management, LLC | 1,043,437 | $53.5M | 0.02% | +49,595+5.0% | Added |
| Bank of New York Mellon Corp | 1,025,342 | $52.6M | 0.01% | −58,671−5.4% | Reduced |
| Norges Bank | 989,109 | $50.7M | 0.01% | −170,806−14.7% | Reduced |
| Morgan Stanley | 983,120 | $50.4M | 0.01% | −48,939−4.7% | Reduced |
| Invesco Ltd. | 927,484 | $47.5M | 0.01% | +152,126+19.6% | Added |
| Charles Schwab Investment Management Inc | 812,326 | $41.6M | 0.01% | +4,317+0.5% | Added |
| Millennium Management LLC | 789,476 | $40.5M | 0.05% | +313,795+66.0% | Added |
| Whale Rock Capital Management LLC | 763,470 | $39.1M | 0.86% | +763,470 | New |
| First Republic Investment Management, Inc. | 737,322 | $37.8M | 0.08% | +737,322 | New |
| FMR LLC | 714,514 | $36.6M | 0.00% | +709,541+14,267.9% | Added |
| Principal Financial Group Inc | 663,528 | $34.0M | 0.02% | −16,205−2.4% | Reduced |
| Driehaus Capital Management LLC | 571,444 | $29.3M | 0.41% | +191,808+50.5% | Added |
| Barington Capital Group, L.P. | 530,100 | $27.2M | 37.11% | 00.0% | Unchanged |
| Park West Asset Management LLC | 500,000 | $25.6M | 2.38% | −43,700−8.0% | Reduced |
| Arrowstreet Capital, Limited Partnership | 492,279 | $25.2M | 0.03% | +377,649+329.5% | Added |
| Man Group plc | – | $22.8M | 0.08% | – | – |
| Panagora Asset Management Inc | 427,578 | $21.9M | 0.14% | +11,250+2.7% | Added |
| Goldman Sachs Group Inc | 375,508 | $19.2M | 0.01% | +16,037+4.5% | Added |
| Epoch Investment Partners, Inc. | 322,332 | $16.5M | 0.10% | −49,886−13.4% | Reduced |
| Rhumbline Advisers | 316,089 | $16.2M | 0.02% | +11,587+3.8% | Added |
| Legal & General Group Plc | 314,421 | $16.1M | 0.01% | +615+0.2% | Added |
| Swedbank AB | 300,000 | $15.4M | 0.03% | +300,000 | New |
| New York State Common Retirement Fund | 282,485 | $14.5M | 0.02% | −17,185−5.7% | Reduced |
| Russell Investments Group, Ltd. | 273,584 | $14.0M | 0.03% | −268,815−49.6% | Reduced |
| CloudAlpha Capital Management Limited/Hong Kong | 272,700 | $14.0M | 2.52% | +272,700 | New |
| AXA S.A. | 266,958 | $13.7M | 0.05% | +9,689+3.8% | Added |
| Mirae Asset Global Investments Co., Ltd. | 265,346 | $13.6M | 0.03% | +2,730+1.0% | Added |
| Summit Partners Public Asset Management, LLC | 261,818 | $13.4M | 0.75% | +261,818 | New |
| Penn Capital Management Co Inc | 259,806 | $13.3M | 1.34% | −56,383−17.8% | Reduced |
| Renaissance Technologies LLC | 257,986 | $13.2M | 0.02% | +206,486+400.9% | Added |
| Crestline Management, LP | 245,152 | $12.6M | 1.54% | +96,072+64.4% | Added |
| Bank of America Corp | 243,392 | $12.5M | 0.00% | −78,152−24.3% | Reduced |
| Primecap Management Co | 238,663 | $12.2M | 0.01% | 00.0% | Unchanged |
| Natixis Advisors, L.P. | 232,360 | $11.9M | 0.04% | −66,720−22.3% | Reduced |
| Swiss National Bank | 232,000 | $11.9M | 0.01% | −34,900−13.1% | Reduced |
| Thrivent Financial for Lutherans | 230,218 | $11.8M | 0.03% | −6,101−2.6% | Reduced |
| Putnam Investments LLC | 220,445 | $11.3M | 0.02% | +154,279+233.2% | Added |
| Glenmede Trust Co NA | 217,998 | $11.2M | 0.06% | −278,243−56.1% | Reduced |
| Voloridge Investment Management, LLC | 216,563 | $11.1M | 0.06% | +158,040+270.0% | Added |
| Credit Suisse AG | 208,955 | $10.7M | 0.01% | +49,280+30.9% | Added |
| Jacobs Levy Equity Management, Inc | 203,026 | $10.4M | 0.06% | +86,222+73.8% | Added |
| Royce & Associates LP | 201,652 | $10.3M | 0.10% | −20,638−9.3% | Reduced |
| Mesirow Institutional Investment Management, Inc. | 197,731 | $10.1M | 1.10% | −15,565−7.3% | Reduced |
| Public Sector Pension Investment Board | 189,036 | $9.69M | 0.07% | −6,504−3.3% | Reduced |
| HighTower Advisors, LLC | 181,864 | $9.32M | 0.02% | −270.0% | Reduced |
| Eagle Asset Management Inc | 181,689 | $9.31M | 0.05% | −9,620−5.0% | Reduced |
| SEI Investments Co | 167,936 | $8.61M | 0.02% | −50,580−23.1% | Reduced |
| Rice Hall James & Associates, LLC | 149,236 | $7.65M | 0.43% | −3,042−2.0% | Reduced |
| Cinctive Capital Management LP | 149,230 | $7.65M | 0.28% | +149,230 | New |
| Alliancebernstein L.P. | 146,932 | $7.53M | 0.00% | −20,348−12.2% | Reduced |
| UBS Asset Management Americas Inc | 134,395 | $6.89M | 0.00% | +4,424+3.4% | Added |
| California State Teachers Retirement System | 134,194 | $6.88M | 0.01% | −4,647−3.3% | Reduced |
| Hillsdale Investment Management Inc. | 126,100 | $6.46M | 0.55% | −4,300−3.3% | Reduced |
| BNP Paribas Arbitrage, SA | 118,278 | $6.06M | 0.01% | +26,938+29.5% | Added |
| First Trust Advisors LP | 117,282 | $6.01M | 0.01% | −10,764−8.4% | Reduced |
| EAM Global Investors LLC | 116,615 | $5.98M | 1.68% | +64,401+123.3% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 113,805 | $5.83M | 0.05% | −1,225−1.1% | Reduced |
| California Public Employees Retirement System | 113,749 | $5.83M | 0.01% | +113,749 | New |
| Wells Fargo & Company | 111,146 | $5.70M | 0.00% | +14,502+15.0% | Added |
| UBS Group AG | 110,454 | $5.66M | 0.00% | +24,494+28.5% | Added |
| Walleye Trading LLC | 109,895 | $5.63M | 0.20% | +109,895 | New |
| Los Angeles Capital Management LLC | 108,811 | $5.58M | 0.02% | −14,311−11.6% | Reduced |
| State of Wisconsin Investment Board | 108,613 | $5.57M | 0.02% | −3,265−2.9% | Reduced |
| Great West Life Assurance Co | 102,248 | $5.24M | 0.01% | −40,882−28.6% | Reduced |
| Texas Permanent School Fund | 96,390 | $4.94M | 0.05% | +24,131+33.4% | Added |
| Jackson Square Partners, LLC | 93,078 | $4.77M | 0.13% | 00.0% | Unchanged |
| Stifel Financial Corp | 92,323 | $4.73M | 0.01% | −1,146−1.2% | Reduced |
| Bridgeway Capital Management, LLC | 92,200 | $4.73M | 0.13% | +92,200 | New |
| Barclays PLC | 91,095 | $4.67M | 0.00% | +10,122+12.5% | Added |
| LPL Financial LLC | 90,770 | $4.65M | 0.00% | −25,115−21.7% | Reduced |
| Schroder Investment Management Group | 87,925 | $4.51M | 0.01% | −12,466−12.4% | Reduced |
| Two Sigma Advisers, LP | 87,785 | $4.50M | 0.01% | −112,700−56.2% | Reduced |
| State of Tennessee, Treasury Department | 85,083 | $4.36M | 0.02% | −24,586−22.4% | Reduced |
| Deutsche Bank AG | 83,107 | $4.26M | 0.00% | +10,767+14.9% | Added |
| Investors Towarzystwo Funduszy Inwestycyjnych Spolka Akcyjna | 82,400 | $4.16M | 2.42% | +29,400+55.5% | Added |
| State of Alaska, Department of Revenue | 73,618 | $3.77M | 0.04% | −1,226−1.6% | Reduced |
| Citigroup Inc | 73,264 | $3.76M | 0.01% | −15,323−17.3% | Reduced |
| Public Employees Retirement System of Ohio | 72,162 | $3.70M | 0.02% | −23,299−24.4% | Reduced |
| Winton Group Ltd | 70,722 | $3.63M | 0.22% | −16,476−18.9% | Reduced |
| Castleark Management LLC | 66,270 | $3.40M | 0.17% | +66,270 | New |
| Advisor Group Holdings, Inc. | 64,878 | $3.33M | 0.01% | +50,620+355.0% | Added |
| Voya Investment Management LLC | 63,754 | $3.27M | 0.00% | +14,461+29.3% | Added |