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, Q4 2023
Institutional positions in Rambus Inc as of Dec 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
- 400
- +55 vs. Q3 2023
- Shares held
- 97.0M
- −967.1K (−1.0%) vs. Q3 2023
- Total value
- $6.62B
- +$1.14B (+20.9%) vs. Q3 2023
- New holders
- 93
- 118 more added
- Sold out
- 38
- 145 more reduced
5 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2023: 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, Q4 2023
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 15,457,989 | $1.06B | 0.03% | −3,432,108−18.2% | Reduced |
| Vanguard Group Inc | 11,375,954 | $776.4M | 0.02% | −1,394,902−10.9% | Reduced |
| JPMorgan Chase & Co | 5,297,053 | $361.5M | 0.04% | +502,726+10.5% | Added |
| State Street Corp | 4,252,386 | $290.2M | 0.01% | −267,559−5.9% | Reduced |
| Wellington Management Group LLP | 3,933,923 | $268.5M | 0.05% | +2,149,396+120.4% | Added |
| Lord, Abbett & Co. LLC | 2,499,638 | $170.6M | 0.60% | +978,484+64.3% | Added |
| Geode Capital Management, LLC | 2,429,060 | $165.8M | 0.02% | +116,459+5.0% | Added |
| Neuberger Berman Group LLC | 2,348,164 | $160.3M | 0.14% | −483,446−17.1% | Reduced |
| Bank of New York Mellon Corp | 2,174,859 | $148.4M | 0.03% | +187,206+9.4% | Added |
| Hood River Capital Management LLC | 1,961,814 | $133.9M | 3.68% | +221,784+12.7% | Added |
| Dimensional Fund Advisors LP | 1,949,911 | $133.1M | 0.04% | −350,342−15.2% | Reduced |
| Millennium Management LLC | 1,853,969 | $126.5M | 0.12% | +1,651,908+817.5% | Added |
| Northern Trust Corp | 1,628,354 | $111.1M | 0.02% | +113,076+7.5% | Added |
| Nuveen Asset Management, LLC | 1,601,429 | $109.3M | 0.04% | −105,627−6.2% | Reduced |
| Polar Capital Holdings Plc | 1,511,521 | $103.2M | 0.72% | +97,127+6.9% | Added |
| Ameriprise Financial Inc | 1,457,949 | $99.5M | 0.03% | −1,676,919−53.5% | Reduced |
| Invesco Ltd. | 1,370,628 | $93.5M | 0.02% | +70,431+5.4% | Added |
| Loomis Sayles & Co L P | 1,269,321 | $86.6M | 0.13% | −155,060−10.9% | Reduced |
| Norges Bank | 1,241,846 | $84.8M | 0.01% | +272,030+28.0% | Added |
| Charles Schwab Investment Management Inc | 1,181,926 | $80.7M | 0.02% | −24,224−2.0% | Reduced |
| Captrust Financial Advisors | 1,082,873 | $73.9M | 0.25% | +11,151+1.0% | Added |
| Morgan Stanley | 970,389 | $66.2M | 0.01% | −79,648−7.6% | Reduced |
| Price T Rowe Associates Inc | 952,300 | $65.0M | 0.01% | +143,466+17.7% | Added |
| Principal Financial Group Inc | 876,408 | $59.8M | 0.04% | −49,991−5.4% | Reduced |
| Goldman Sachs Group Inc | 858,444 | $58.6M | 0.01% | +133,304+18.4% | Added |
| Vaughan Nelson Investment Management, L.P. | 822,397 | $56.1M | 0.56% | −389,275−32.1% | Reduced |
| Voya Investment Management LLC | 773,166 | $52.8M | 0.05% | +492,241+175.2% | Added |
| Driehaus Capital Management LLC | 772,842 | $52.7M | 0.64% | +163,851+26.9% | Added |
| Swedbank AB | 750,000 | $51.2M | 0.08% | −50,000−6.3% | Reduced |
| Macquarie Group Ltd | 743,748 | $50.8M | 0.06% | +104,942+16.4% | Added |
| Fred Alger Management, LLC | 722,959 | $49.3M | 0.27% | −82,672−10.3% | Reduced |
| Rafferty Asset Management, LLC | 677,660 | $46.3M | 0.20% | +80,670+13.5% | Added |
| Barclays PLC | 675,329 | $46.1M | 0.02% | +367,843+119.6% | Added |
| Eagle Asset Management Inc | 648,571 | $44.3M | 0.24% | +156,914+31.9% | Added |
| Summit Partners Public Asset Management, LLC | 594,626 | $40.6M | 2.20% | +362,918+156.6% | Added |
| Silvercrest Asset Management Group LLC | 592,862 | $40.5M | 0.29% | −3,311−0.6% | Reduced |
| Bank of America Corp | 579,508 | $39.6M | 0.00% | −55,716−8.8% | Reduced |
| UBS Group AG | 505,665 | $34.5M | 0.01% | +277,889+122.0% | Added |
| Putnam Investments LLC | 400,704 | $27.3M | 0.04% | +19,023+5.0% | Added |
| Panagora Asset Management Inc | 399,407 | $27.3M | 0.15% | −8,861−2.2% | Reduced |
| BNP Paribas Arbitrage, SA | 361,598 | $24.7M | 0.04% | +85,916+31.2% | Added |
| Emerald Advisers, LLC | 358,693 | $24.5M | 1.05% | −5,586−1.5% | Reduced |
| HRT Financial LP | 334,023 | $22.8M | 0.17% | +334,023 | New |
| Rhumbline Advisers | 332,041 | $22.7M | 0.02% | +19,690+6.3% | Added |
| Mirae Asset Global Investments Co., Ltd. | 328,689 | $22.4M | 0.05% | −17,155−5.0% | Reduced |
| FMR LLC | 327,087 | $22.3M | 0.00% | +13,835+4.4% | Added |
| Cercano Management LLC | 320,184 | $21.9M | 0.72% | +320,184 | New |
| Emerald Mutual Fund Advisers Trust | 295,566 | $20.2M | 1.07% | 00.0% | Unchanged |
| Jane Street Group, LLC | 281,011 | $19.2M | 0.02% | +180,641+180.0% | Added |
| Artisan Partners Limited Partnership | 269,818 | $18.4M | 0.03% | −11,070−3.9% | Reduced |
| Axiom Investors LLC | 259,550 | $17.7M | 0.17% | +163,872+171.3% | Added |
| Legal & General Group Plc | 258,550 | $17.6M | 0.01% | −138,715−34.9% | Reduced |
| New York State Common Retirement Fund | 257,006 | $17.5M | 0.02% | −2,013−0.8% | Reduced |
| Penn Capital Management Co Inc | 254,669 | $17.4M | 1.60% | −13,892−5.2% | Reduced |
| Twinbeech Capital LP | 252,625 | $17.2M | 0.28% | +248,286+5,722.2% | Added |
| Alliancebernstein L.P. | 245,303 | $16.7M | 0.01% | +95,354+63.6% | Added |
| WCM Investment Management, LLC | 227,710 | $15.6M | 0.04% | +62,880+38.1% | Added |
| Westwood Holdings Group Inc. | 220,067 | $15.0M | 0.13% | +38,268+21.0% | Added |
| Glenmede Trust Co NA | 218,378 | $14.9M | 0.08% | −7,940−3.5% | Reduced |
| Swiss National Bank | 215,100 | $14.7M | 0.01% | −24,200−10.1% | Reduced |
| California Public Employees Retirement System | 213,320 | $14.6M | 0.01% | −2,533−1.2% | Reduced |
| Park West Asset Management LLC | 210,000 | $14.3M | 1.40% | +210,000 | New |
| Citigroup Inc | 204,575 | $14.0M | 0.02% | −65,834−24.3% | Reduced |
| American International Group, Inc. | 198,577 | $13.6M | 0.06% | +138,714+231.7% | Added |
| Segall Bryant & Hamill, LLC | 197,184 | $13.5M | 0.26% | +136,009+222.3% | Added |
| Mesirow Institutional Investment Management, Inc. | 194,465 | $13.3M | 1.24% | −46,191−19.2% | Reduced |
| Schroder Investment Management Group | 193,821 | $13.2M | 0.02% | −109,728−36.1% | Reduced |
| Susquehanna International Group, LLP | 192,831 | $13.2M | 0.02% | +69,592+56.5% | Added |
| AXA S.A. | 191,026 | $13.0M | 0.04% | −63,774−25.0% | Reduced |
| HighTower Advisors, LLC | 185,403 | $12.7M | 0.02% | +771+0.4% | Added |
| First Trust Advisors LP | 183,959 | $12.6M | 0.01% | −57,468−23.8% | Reduced |
| Natixis Advisors, L.P. | 174,059 | $11.9M | 0.03% | −72,284−29.3% | Reduced |
| Royce & Associates LP | 170,608 | $11.6M | 0.11% | −39,053−18.6% | Reduced |
| SEI Investments Co | 168,420 | $11.5M | 0.02% | −37,985−18.4% | Reduced |
| Stephens Investment Management Group LLC | 164,689 | $11.2M | 0.16% | −105−0.1% | Reduced |
| Credit Suisse AG | 160,056 | $10.9M | 0.01% | −58,365−26.7% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 150,323 | $10.3M | 0.04% | +150,323 | New |
| Assenagon Asset Management S.A. | 147,798 | $10.1M | 0.03% | +147,798 | New |
| Victory Capital Management Inc | 146,174 | $9.98M | 0.01% | +113,815+351.7% | Added |
| Capital Fund Management S.A. | 144,696 | $9.88M | 0.13% | +29,562+25.7% | Added |
| Citadel Advisors LLC | 140,753 | $9.61M | 0.01% | +3,002+2.2% | Added |
| Epoch Investment Partners, Inc. | 135,287 | $9.23M | 0.04% | −37,800−21.8% | Reduced |
| Primecap Management Co | 134,963 | $9.21M | 0.01% | −31,200−18.8% | Reduced |
| Retirement Systems of Alabama | 134,649 | $9.19M | 0.04% | +134,649 | New |
| Wells Fargo & Company | 131,600 | $8.98M | 0.00% | +3,054+2.4% | Added |
| UBS Asset Management Americas Inc | 130,485 | $8.91M | 0.00% | +3,000+2.4% | Added |
| Barington Capital Group, L.P. | 130,100 | $8.88M | 11.45% | −70,000−35.0% | Reduced |
| Manufacturers Life Insurance Company, The | 128,110 | $8.74M | 0.01% | +58,452+83.9% | Added |
| Mutual of America Capital Management LLC | 122,148 | $8.34M | 0.10% | +44,792+57.9% | Added |
| MetLife Investment Management | 116,019 | $7.92M | 0.06% | +58,528+101.8% | Added |
| California State Teachers Retirement System | 115,165 | $7.86M | 0.01% | −5,165−4.3% | Reduced |
| Amundi | 114,695 | $7.65M | 0.00% | −57,612−33.4% | Reduced |
| Castleark Management LLC | 110,540 | $7.54M | 0.33% | −58,220−34.5% | Reduced |
| Bank of Montreal | 105,511 | $7.27M | 0.00% | +90,247+591.2% | Added |
| D. E. Shaw & Co., Inc. | 97,431 | $6.65M | 0.01% | −109,879−53.0% | Reduced |
| LPL Financial LLC | 95,902 | $6.55M | 0.00% | −1,103−1.1% | Reduced |
| Crestline Management, LP | 94,364 | $6.44M | 0.60% | −32,663−25.7% | Reduced |
| Knights of Columbus Asset Advisors LLC | 93,497 | $6.38M | 0.41% | +53,878+136.0% | Added |
| Texas Permanent School Fund | 92,872 | $6.34M | 0.05% | +189+0.2% | Added |
| Great West Life Assurance Co | 89,562 | $6.09M | 0.01% | −36,518−29.0% | Reduced |