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, 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 | 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, 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 |
|---|---|---|---|---|---|
| Great West Life Assurance Co | 89,562 | $6.09M | 0.01% | −36,518−29.0% | Reduced |
| Texas Permanent School Fund | 92,872 | $6.34M | 0.05% | +189+0.2% | Added |
| Knights of Columbus Asset Advisors LLC | 93,497 | $6.38M | 0.41% | +53,878+136.0% | Added |
| Crestline Management, LP | 94,364 | $6.44M | 0.60% | −32,663−25.7% | Reduced |
| LPL Financial LLC | 95,902 | $6.55M | 0.00% | −1,103−1.1% | Reduced |
| D. E. Shaw & Co., Inc. | 97,431 | $6.65M | 0.01% | −109,879−53.0% | Reduced |
| Bank of Montreal | 105,511 | $7.27M | 0.00% | +90,247+591.2% | Added |
| Castleark Management LLC | 110,540 | $7.54M | 0.33% | −58,220−34.5% | Reduced |
| Amundi | 114,695 | $7.65M | 0.00% | −57,612−33.4% | Reduced |
| California State Teachers Retirement System | 115,165 | $7.86M | 0.01% | −5,165−4.3% | Reduced |
| MetLife Investment Management | 116,019 | $7.92M | 0.06% | +58,528+101.8% | Added |
| Mutual of America Capital Management LLC | 122,148 | $8.34M | 0.10% | +44,792+57.9% | Added |
| Manufacturers Life Insurance Company, The | 128,110 | $8.74M | 0.01% | +58,452+83.9% | Added |
| Barington Capital Group, L.P. | 130,100 | $8.88M | 11.45% | −70,000−35.0% | Reduced |
| UBS Asset Management Americas Inc | 130,485 | $8.91M | 0.00% | +3,000+2.4% | Added |
| Wells Fargo & Company | 131,600 | $8.98M | 0.00% | +3,054+2.4% | Added |
| Retirement Systems of Alabama | 134,649 | $9.19M | 0.04% | +134,649 | New |
| Primecap Management Co | 134,963 | $9.21M | 0.01% | −31,200−18.8% | Reduced |
| Epoch Investment Partners, Inc. | 135,287 | $9.23M | 0.04% | −37,800−21.8% | Reduced |
| Citadel Advisors LLC | 140,753 | $9.61M | 0.01% | +3,002+2.2% | Added |
| Capital Fund Management S.A. | 144,696 | $9.88M | 0.13% | +29,562+25.7% | Added |
| Victory Capital Management Inc | 146,174 | $9.98M | 0.01% | +113,815+351.7% | Added |
| Assenagon Asset Management S.A. | 147,798 | $10.1M | 0.03% | +147,798 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 150,323 | $10.3M | 0.04% | +150,323 | New |
| Credit Suisse AG | 160,056 | $10.9M | 0.01% | −58,365−26.7% | Reduced |
| Stephens Investment Management Group LLC | 164,689 | $11.2M | 0.16% | −105−0.1% | Reduced |
| SEI Investments Co | 168,420 | $11.5M | 0.02% | −37,985−18.4% | Reduced |
| Royce & Associates LP | 170,608 | $11.6M | 0.11% | −39,053−18.6% | Reduced |
| Natixis Advisors, L.P. | 174,059 | $11.9M | 0.03% | −72,284−29.3% | Reduced |
| First Trust Advisors LP | 183,959 | $12.6M | 0.01% | −57,468−23.8% | Reduced |
| HighTower Advisors, LLC | 185,403 | $12.7M | 0.02% | +771+0.4% | Added |
| AXA S.A. | 191,026 | $13.0M | 0.04% | −63,774−25.0% | Reduced |
| Susquehanna International Group, LLP | 192,831 | $13.2M | 0.02% | +69,592+56.5% | Added |
| Schroder Investment Management Group | 193,821 | $13.2M | 0.02% | −109,728−36.1% | Reduced |
| Mesirow Institutional Investment Management, Inc. | 194,465 | $13.3M | 1.24% | −46,191−19.2% | Reduced |
| Segall Bryant & Hamill, LLC | 197,184 | $13.5M | 0.26% | +136,009+222.3% | Added |
| American International Group, Inc. | 198,577 | $13.6M | 0.06% | +138,714+231.7% | Added |
| Citigroup Inc | 204,575 | $14.0M | 0.02% | −65,834−24.3% | Reduced |
| Park West Asset Management LLC | 210,000 | $14.3M | 1.40% | +210,000 | New |
| California Public Employees Retirement System | 213,320 | $14.6M | 0.01% | −2,533−1.2% | Reduced |
| Swiss National Bank | 215,100 | $14.7M | 0.01% | −24,200−10.1% | Reduced |
| Glenmede Trust Co NA | 218,378 | $14.9M | 0.08% | −7,940−3.5% | Reduced |
| Westwood Holdings Group Inc. | 220,067 | $15.0M | 0.13% | +38,268+21.0% | Added |
| WCM Investment Management, LLC | 227,710 | $15.6M | 0.04% | +62,880+38.1% | Added |
| Alliancebernstein L.P. | 245,303 | $16.7M | 0.01% | +95,354+63.6% | Added |
| Twinbeech Capital LP | 252,625 | $17.2M | 0.28% | +248,286+5,722.2% | Added |
| Penn Capital Management Co Inc | 254,669 | $17.4M | 1.60% | −13,892−5.2% | Reduced |
| New York State Common Retirement Fund | 257,006 | $17.5M | 0.02% | −2,013−0.8% | Reduced |
| Legal & General Group Plc | 258,550 | $17.6M | 0.01% | −138,715−34.9% | Reduced |
| Axiom Investors LLC | 259,550 | $17.7M | 0.17% | +163,872+171.3% | Added |
| Artisan Partners Limited Partnership | 269,818 | $18.4M | 0.03% | −11,070−3.9% | Reduced |
| Jane Street Group, LLC | 281,011 | $19.2M | 0.02% | +180,641+180.0% | Added |
| Emerald Mutual Fund Advisers Trust | 295,566 | $20.2M | 1.07% | 00.0% | Unchanged |
| Cercano Management LLC | 320,184 | $21.9M | 0.72% | +320,184 | New |
| FMR LLC | 327,087 | $22.3M | 0.00% | +13,835+4.4% | Added |
| Mirae Asset Global Investments Co., Ltd. | 328,689 | $22.4M | 0.05% | −17,155−5.0% | Reduced |
| Rhumbline Advisers | 332,041 | $22.7M | 0.02% | +19,690+6.3% | Added |
| HRT Financial LP | 334,023 | $22.8M | 0.17% | +334,023 | New |
| Emerald Advisers, LLC | 358,693 | $24.5M | 1.05% | −5,586−1.5% | Reduced |
| BNP Paribas Arbitrage, SA | 361,598 | $24.7M | 0.04% | +85,916+31.2% | Added |
| Panagora Asset Management Inc | 399,407 | $27.3M | 0.15% | −8,861−2.2% | Reduced |
| Putnam Investments LLC | 400,704 | $27.3M | 0.04% | +19,023+5.0% | Added |
| UBS Group AG | 505,665 | $34.5M | 0.01% | +277,889+122.0% | Added |
| Bank of America Corp | 579,508 | $39.6M | 0.00% | −55,716−8.8% | Reduced |
| Silvercrest Asset Management Group LLC | 592,862 | $40.5M | 0.29% | −3,311−0.6% | Reduced |
| Summit Partners Public Asset Management, LLC | 594,626 | $40.6M | 2.20% | +362,918+156.6% | Added |
| Eagle Asset Management Inc | 648,571 | $44.3M | 0.24% | +156,914+31.9% | Added |
| Barclays PLC | 675,329 | $46.1M | 0.02% | +367,843+119.6% | Added |
| Rafferty Asset Management, LLC | 677,660 | $46.3M | 0.20% | +80,670+13.5% | Added |
| Fred Alger Management, LLC | 722,959 | $49.3M | 0.27% | −82,672−10.3% | Reduced |
| Macquarie Group Ltd | 743,748 | $50.8M | 0.06% | +104,942+16.4% | Added |
| Swedbank AB | 750,000 | $51.2M | 0.08% | −50,000−6.3% | Reduced |
| Driehaus Capital Management LLC | 772,842 | $52.7M | 0.64% | +163,851+26.9% | Added |
| Voya Investment Management LLC | 773,166 | $52.8M | 0.05% | +492,241+175.2% | Added |
| Vaughan Nelson Investment Management, L.P. | 822,397 | $56.1M | 0.56% | −389,275−32.1% | Reduced |
| Goldman Sachs Group Inc | 858,444 | $58.6M | 0.01% | +133,304+18.4% | Added |
| Principal Financial Group Inc | 876,408 | $59.8M | 0.04% | −49,991−5.4% | Reduced |
| Price T Rowe Associates Inc | 952,300 | $65.0M | 0.01% | +143,466+17.7% | Added |
| Morgan Stanley | 970,389 | $66.2M | 0.01% | −79,648−7.6% | Reduced |
| Captrust Financial Advisors | 1,082,873 | $73.9M | 0.25% | +11,151+1.0% | Added |
| Charles Schwab Investment Management Inc | 1,181,926 | $80.7M | 0.02% | −24,224−2.0% | Reduced |
| Norges Bank | 1,241,846 | $84.8M | 0.01% | +272,030+28.0% | Added |
| Loomis Sayles & Co L P | 1,269,321 | $86.6M | 0.13% | −155,060−10.9% | Reduced |
| Invesco Ltd. | 1,370,628 | $93.5M | 0.02% | +70,431+5.4% | Added |
| Ameriprise Financial Inc | 1,457,949 | $99.5M | 0.03% | −1,676,919−53.5% | Reduced |
| Polar Capital Holdings Plc | 1,511,521 | $103.2M | 0.72% | +97,127+6.9% | Added |
| Nuveen Asset Management, LLC | 1,601,429 | $109.3M | 0.04% | −105,627−6.2% | Reduced |
| Northern Trust Corp | 1,628,354 | $111.1M | 0.02% | +113,076+7.5% | Added |
| Millennium Management LLC | 1,853,969 | $126.5M | 0.12% | +1,651,908+817.5% | Added |
| Dimensional Fund Advisors LP | 1,949,911 | $133.1M | 0.04% | −350,342−15.2% | Reduced |
| Hood River Capital Management LLC | 1,961,814 | $133.9M | 3.68% | +221,784+12.7% | Added |
| Bank of New York Mellon Corp | 2,174,859 | $148.4M | 0.03% | +187,206+9.4% | Added |
| Neuberger Berman Group LLC | 2,348,164 | $160.3M | 0.14% | −483,446−17.1% | Reduced |
| Geode Capital Management, LLC | 2,429,060 | $165.8M | 0.02% | +116,459+5.0% | Added |
| Lord, Abbett & Co. LLC | 2,499,638 | $170.6M | 0.60% | +978,484+64.3% | Added |
| Wellington Management Group LLP | 3,933,923 | $268.5M | 0.05% | +2,149,396+120.4% | Added |
| State Street Corp | 4,252,386 | $290.2M | 0.01% | −267,559−5.9% | Reduced |
| JPMorgan Chase & Co | 5,297,053 | $361.5M | 0.04% | +502,726+10.5% | Added |
| Vanguard Group Inc | 11,375,954 | $776.4M | 0.02% | −1,394,902−10.9% | Reduced |
| BlackRock Inc. | 15,457,989 | $1.06B | 0.03% | −3,432,108−18.2% | Reduced |