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, Q1 2026
Institutional positions in Rambus Inc as of Mar 31, 2026. 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
- 557
- +11 vs. Q4 2025
- Shares held
- 102.8M
- +17.0M (+19.8%) vs. Q4 2025
- Total value
- $8.83B
- +$938.8M (+11.9%) vs. Q4 2025
- New holders
- 85
- 189 more added
- Sold out
- 74
- 207 more reduced
8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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 | 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, Q1 2026
Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Adams Wealth Management | 0 | $0 | 0.00% | −3,018−100.0% | Sold out |
| CacheTech Inc. | 0 | $0 | 0.00% | −3,018−100.0% | Sold out |
| Colony Group, LLC | 0 | $0 | 0.00% | −2,928−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −2,756−100.0% | Sold out |
| VARCOV Co. | 0 | $0 | 0.00% | −2,672−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −2,636−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −2,600−100.0% | Sold out |
| Net Worth Advisory Group | 0 | $0 | 0.00% | −2,576−100.0% | Sold out |
| Jag Capital Management, LLC | 0 | $0 | 0.00% | −2,563−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −2,378−100.0% | Sold out |
| Argent Trust Co | 0 | $0 | 0.00% | −2,206−100.0% | Sold out |
| Kestra Advisory Services, LLC | 0 | $0 | 0.00% | −2,087−100.0% | Sold out |
| Flagship Wealth Advisors, LLC | 0 | $0 | 0.00% | −700−100.0% | Sold out |
| Migdal Insurance & Financial Holdings Ltd. | 0 | $0 | 0.00% | −548−100.0% | Sold out |
| Twin Tree Management, LP | 0 | $0 | 0.00% | −455−100.0% | Sold out |
| Torren Management, LLC | 0 | $0 | 0.00% | −280−100.0% | Sold out |
| Meeder Asset Management Inc | 0 | $0 | 0.00% | −243−100.0% | Sold out |
| Macquarie Group Ltd | 0 | $0 | 0.00% | −163−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −131−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −105−100.0% | Sold out |
| SageView Advisory Group, LLC | 0 | $0 | 0.00% | −74−100.0% | Sold out |
| Optima Capital LLC | 0 | $0 | 0.00% | −32−100.0% | Sold out |
| Battery Global Advisors, LLC | 0 | $0 | 0.00% | −32−100.0% | Sold out |
| Elyxium Wealth, LLC | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| Atlantic Edge Private Wealth Management, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| Annis Gardner Whiting Capital Advisors, LLC | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| South State Corp. | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| TD Private Client Wealth LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Quaker Wealth Management, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| ROSS\JOHNSON & Associates LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |
| Meritage Portfolio Management | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |
| Maryland Capital Advisors Inc. | – | – | – | – | Not filed |