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, Q2 2025
Institutional positions in Rambus Inc as of Jun 30, 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
- 459
- +49 vs. Q1 2025
- Shares held
- 97.1M
- +715.5K (+0.7%) vs. Q1 2025
- Total value
- $6.22B
- +$1.23B (+24.5%) vs. Q1 2025
- New holders
- 88
- 191 more added
- Sold out
- 39
- 131 more reduced
3 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: 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, Q2 2025
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Louisiana State Employees Retirement System | 30,200 | $1.93M | 0.04% | +300+1.0% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 30,357 | $1.94M | 0.01% | +28,500+1,534.7% | Added |
| Diversified Trust Co | 30,942 | $1.98M | 0.04% | +350+1.1% | Added |
| State Board of Administration of Florida Retirement System | 31,123 | $1.99M | 0.00% | 00.0% | Unchanged |
| Arizona State Retirement System | 31,340 | $2.01M | 0.01% | +825+2.7% | Added |
| Cetera Investment Advisers | 31,667 | $2.03M | 0.00% | +4,160+15.1% | Added |
| Ameritas Investment Partners, Inc. | 31,883 | $2.04M | 0.06% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 32,526 | $2.08M | 0.00% | −4,950−13.2% | Reduced |
| Mackenzie Financial Corp | 32,597 | $2.09M | 0.00% | +6,434+24.6% | Added |
| American Century Companies Inc | 32,953 | $2.11M | 0.00% | −1,391,412−97.7% | Reduced |
| Investors Towarzystwo Funduszy Inwestycyjnych Spolka Akcyjna | 33,150 | $2.12M | 0.85% | −10,500−24.1% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 33,389 | $2.14M | 0.00% | +4,790+16.7% | Added |
| State of New Jersey Common Pension Fund D | 34,546 | $2.21M | 0.01% | +559+1.6% | Added |
| Yousif Capital Management, LLC | 35,995 | $2.30M | 0.02% | −406−1.1% | Reduced |
| Teacher Retirement System of Texas | 36,401 | $2.33M | 0.01% | −1,393−3.7% | Reduced |
| Magnetar Financial LLC | 36,439 | $2.33M | 0.01% | +36,439 | New |
| Victory Capital Management Inc | 37,829 | $2.42M | 0.00% | −16,353−30.2% | Reduced |
| ProShare Advisors LLC | 39,700 | $2.54M | 0.01% | −618−1.5% | Reduced |
| PEAK6 LLC | 40,887 | $2.62M | 0.09% | +2,626+6.9% | Added |
| Campbell Newman Asset Management Inc | 41,663 | $2.67M | 0.21% | +2,784+7.2% | Added |
| Meritage Portfolio Management | 41,824 | $2.68M | 0.17% | +680+1.7% | Added |
| Aspetuck Financial Management LLC | 42,275 | $2.71M | 2.04% | 00.0% | Unchanged |
| Captrust Financial Advisors | 42,678 | $2.73M | 0.01% | +59+0.1% | Added |
| Jain Global LLC | 43,120 | $2.76M | 0.04% | +43,120 | New |
| Dark Forest Capital Management LP | 43,444 | $2.78M | 0.11% | +38,947+866.1% | Added |
| Public Employees Retirement System of Ohio | 44,551 | $2.85M | 0.01% | +20,424+84.7% | Added |
| State of Tennessee, Treasury Department | 46,266 | $2.96M | 0.01% | +2,188+5.0% | Added |
| B. Metzler seel. Sohn & Co. AG | 46,479 | $2.98M | 0.03% | 00.0% | Unchanged |
| Amalgamated Bank | 47,213 | $3.02M | 0.02% | +293+0.6% | Added |
| D. E. Shaw & Co., Inc. | 52,532 | $3.36M | 0.00% | −4,226−7.4% | Reduced |
| Teachers Retirement System of the State of Kentucky | 53,602 | $3.43M | 0.03% | 00.0% | Unchanged |
| Baird Financial Group, Inc. | 54,805 | $3.51M | 0.01% | +54,805 | New |
| Primecap Management Co | 62,300 | $3.99M | 0.00% | −10,600−14.5% | Reduced |
| Royce & Associates LP | 64,175 | $4.11M | 0.04% | −115,732−64.3% | Reduced |
| Harbor Capital Advisors, Inc. | 64,440 | $4.13M | 0.17% | −12,179−15.9% | Reduced |
| Alberta Investment Management Corp | 64,600 | $4.14M | 0.03% | +3,632+6.0% | Added |
| New York State Teachers Retirement System | 65,161 | $4.17M | 0.01% | 00.0% | Unchanged |
| Globeflex Capital L P | 65,570 | $4.20M | 0.35% | +31,581+92.9% | Added |
| Cinctive Capital Management LP | 65,677 | $4.20M | 0.23% | +65,677 | New |
| Acadian Asset Management LLC | 68,056 | $4.35M | 0.01% | +63,817+1,505.5% | Added |
| Allspring Global Investments Holdings, LLC | 68,156 | $4.37M | 0.01% | +57,554+542.9% | Added |
| Nordea Investment Management AB | 69,116 | $4.38M | 0.00% | +63,864+1,216.0% | Added |
| Rice Hall James & Associates, LLC | 68,786 | $4.40M | 0.24% | +117+0.2% | Added |
| Intech Investment Management LLC | 69,410 | $4.44M | 0.04% | −11,063−13.7% | Reduced |
| Creative Planning | 70,225 | $4.50M | 0.00% | +14,605+26.3% | Added |
| Squarepoint Ops LLC | 71,404 | $4.57M | 0.01% | +43,404+155.0% | Added |
| Vident Advisory, LLC | 75,506 | $4.83M | 0.05% | +2,238+3.1% | Added |
| Moody Aldrich Partners LLC | 79,150 | $5.07M | 0.98% | +34,112+75.7% | Added |
| HSBC Holdings PLC | 81,934 | $5.21M | 0.00% | +59,742+269.2% | Added |
| Great West Life Assurance Co | 82,307 | $5.27M | 0.01% | −1,248−1.5% | Reduced |
| Comerica Bank | 83,759 | $5.36M | 0.02% | −17,253−17.1% | Reduced |
| Thornburg Investment Management Inc | 86,748 | $5.55M | 0.07% | +5,628+6.9% | Added |
| LPL Financial LLC | 87,183 | $5.58M | 0.00% | +7,167+9.0% | Added |
| Fred Alger Management, LLC | 93,784 | $6.00M | 0.03% | −6,036−6.0% | Reduced |
| Jump Financial, LLC | 99,200 | $6.35M | 0.08% | +99,200 | New |
| Envestnet Asset Management Inc | 99,481 | $6.37M | 0.00% | +15,218+18.1% | Added |
| California State Teachers Retirement System | 99,552 | $6.37M | 0.01% | +370.0% | Added |
| Polar Asset Management Partners Inc. | 100,170 | $6.41M | 0.16% | +100,170 | New |
| State of Wisconsin Investment Board | 100,995 | $6.47M | 0.02% | −1,876−1.8% | Reduced |
| Stanley-Laman Group, Ltd. | 103,312 | $6.61M | 0.98% | +103,312 | New |
| Hillsdale Investment Management Inc. | 103,630 | $6.63M | 0.24% | +39,030+60.4% | Added |
| Los Angeles Capital Management LLC | 104,146 | $6.67M | 0.02% | +84,509+430.4% | Added |
| Jane Street Group, LLC | 108,921 | $6.97M | 0.01% | −239,370−68.7% | Reduced |
| Apis Capital Advisors, LLC | 112,000 | $7.17M | 2.55% | +18,000+19.1% | Added |
| Van Eck Associates Corp | 113,364 | $7.26M | 0.01% | −14,939−11.6% | Reduced |
| Castleark Management LLC | 114,700 | $7.34M | 0.22% | −3,400−2.9% | Reduced |
| Manufacturers Life Insurance Company, The | 121,209 | $7.76M | 0.01% | −4,844−3.8% | Reduced |
| Renaissance Group LLC | 121,593 | $7.78M | 0.30% | +27,928+29.8% | Added |
| Assetmark, Inc | 125,556 | $8.04M | 0.02% | +11,100+9.7% | Added |
| Deutsche Bank AG | 127,806 | $8.18M | 0.00% | −65,020−33.7% | Reduced |
| Two Sigma Advisers, LP | 129,300 | $8.28M | 0.02% | −164,500−56.0% | Reduced |
| Granahan Investment Management Inc | 130,081 | $8.33M | 0.34% | +1,399+1.1% | Added |
| Schroder Investment Management Group | 130,621 | $8.36M | 0.01% | +130,621 | New |
| Russell Investments Group, Ltd. | 131,178 | $8.40M | 0.01% | −8,979−6.4% | Reduced |
| Retirement Systems of Alabama | 131,283 | $8.40M | 0.03% | +1,568+1.2% | Added |
| Two Sigma Investments, LP | 131,653 | $8.43M | 0.02% | −181,521−58.0% | Reduced |
| UBS Group AG | 140,441 | $8.99M | 0.00% | +17,765+14.5% | Added |
| Man Group plc | 141,292 | $9.05M | 0.02% | +113,144+402.0% | Added |
| Canada Pension Plan Investment Board | 141,500 | $9.06M | 0.01% | +800+0.6% | Added |
| Susquehanna International Group, LLP | 143,716 | $9.20M | 0.01% | +12,219+9.3% | Added |
| First Trust Advisors LP | 149,330 | $9.56M | 0.01% | +20,601+16.0% | Added |
| Citigroup Inc | 150,134 | $9.61M | 0.01% | +38,180+34.1% | Added |
| Mutual of America Capital Management LLC | 151,854 | $9.72M | 0.10% | +6,932+4.8% | Added |
| Citadel Advisors LLC | 152,404 | $9.76M | 0.01% | +134,132+734.1% | Added |
| DekaBank Deutsche Girozentrale | 154,173 | $10.0M | 0.02% | 00.0% | Unchanged |
| Wells Fargo & Company | 170,639 | $10.9M | 0.00% | +61,297+56.1% | Added |
| Algert Global LLC | 170,844 | $10.9M | 0.23% | −452−0.3% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 174,218 | $11.2M | 0.02% | −8,722−4.8% | Reduced |
| California Public Employees Retirement System | 185,883 | $11.9M | 0.01% | +13,499+7.8% | Added |
| Congress Wealth Management LLC | 191,225 | $12.2M | 0.12% | +8,569+4.7% | Added |
| Stephens Investment Management Group LLC | 195,123 | $12.5M | 0.16% | +1,462+0.8% | Added |
| Swiss National Bank | 205,200 | $13.1M | 0.01% | −1,200−0.6% | Reduced |
| New York State Common Retirement Fund | 207,239 | $13.3M | 0.02% | −145,073−41.2% | Reduced |
| BNP Paribas Arbitrage, SA | 209,330 | $13.4M | 0.01% | +128,660+159.5% | Added |
| Janus Henderson Group PLC | 213,403 | $13.7M | 0.01% | +23,085+12.1% | Added |
| Lazard Asset Management LLC | 214,437 | $13.7M | 0.02% | +105,860+97.5% | Added |
| HighTower Advisors, LLC | 218,320 | $14.0M | 0.02% | +24,776+12.8% | Added |
| Loomis Sayles & Co L P | 220,228 | $14.1M | 0.02% | +220,228 | New |
| Bridgewater Associates, LP | 226,869 | $14.5M | 0.06% | +148,790+190.6% | Added |
| Legal & General Group Plc | 230,197 | $14.7M | 0.00% | +270+0.1% | Added |