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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 2025

Institutional positions in Rambus Inc as of Dec 31, 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
554
+50 vs. Q3 2025
Shares held
99.8M
+1.42M (+1.4%) vs. Q3 2025
Total value
$9.18B
−$1.08B (−10.5%) vs. Q3 2025
New holders
103
190 more added
Sold out
53
195 more reduced

9 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 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.

Institutional holdersQ4 2025: 554 institutions
Q1 2021: 213 institutionsQ2 2021: 219 institutionsQ3 2021: 236 institutionsQ4 2021: 258 institutionsQ1 2022: 276 institutionsQ2 2022: 253 institutionsQ3 2022: 241 institutionsQ4 2022: 303 institutionsQ1 2023: 337 institutionsQ2 2023: 393 institutionsQ3 2023: 350 institutionsQ4 2023: 400 institutionsQ1 2024: 375 institutionsQ2 2024: 363 institutionsQ3 2024: 376 institutionsQ4 2024: 395 institutionsQ1 2025: 413 institutionsQ2 2025: 459 institutionsQ3 2025: 513 institutionsQ4 2025: 554 institutionsQ1 2026: 557 institutionsQ2 2026: 621 institutions
Value heldQ4 2025: $9.18B
Q1 2021: $1.86BQ2 2021: $2.30BQ3 2021: $2.07BQ4 2021: $2.80BQ1 2022: $2.98BQ2 2022: $2.07BQ3 2022: $2.38BQ4 2022: $3.27BQ1 2023: $4.81BQ2 2023: $6.14BQ3 2023: $5.48BQ4 2023: $6.62BQ1 2024: $6.00BQ2 2024: $5.64BQ3 2024: $3.94BQ4 2024: $5.03BQ1 2025: $5.01BQ2 2025: $6.22BQ3 2025: $10.3BQ4 2025: $9.18BQ1 2026: $8.83BQ2 2026: $13.3B
Institutions holding RMBS and their total value by quarter
QuarterHoldersValue
Q2 2026621$13.3B
Q1 2026557$8.83B
Q4 2025554$9.18B
Q3 2025513$10.3B
Q2 2025459$6.22B
Q1 2025413$5.01B
Q4 2024395$5.03B
Q3 2024376$3.94B
Q2 2024363$5.64B
Q1 2024375$6.00B
Q4 2023400$6.62B
Q3 2023350$5.48B
Q2 2023393$6.14B
Q1 2023337$4.81B
Q4 2022303$3.27B
Q3 2022241$2.38B
Q2 2022253$2.07B
Q1 2022276$2.98B
Q4 2021258$2.80B
Q3 2021236$2.07B
Q2 2021219$2.30B
Q1 2021213$1.86B

Institutions, Q4 2025

Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q3 2025.

Institutions holding RMBS in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
High Note Wealth, LLC42$3.86K0.00%+17+68.0%Added
Colonial Trust Co40$3.68K0.00%−13−24.5%Reduced
Zions Bancorporation, National Association37$3.40K0.00%+37New
Leonteq Securities AG33$3.03K0.00%−1,384−97.7%Reduced
Optima Capital LLC32$2.94K0.00%+32New
Battery Global Advisors, LLC32$2.94K0.00%+32New
LRI Investments, LLC30$2.72K0.00%+30New
Toth Financial Advisory Corp28$2.57K0.00%00.0%Unchanged
Elyxium Wealth, LLC28$2.57K0.00%+28New
MV Capital Management, Inc.27$2.48K0.00%00.0%Unchanged
Cornerstone Financial Management LLC26$2.39K0.00%+26New
Atlantic Trust, LLC25$2.30K0.00%00.0%Unchanged
Cullen/Frost Bankers, Inc.23$2.12K0.00%−186−89.0%Reduced
Avion Wealth28$2.00K0.00%−5−15.2%Reduced
Manchester Capital Management LLC21$1.93K0.00%00.0%Unchanged
Bogart Wealth, LLC21$1.93K0.00%00.0%Unchanged
CBIZ Investment Advisory Services, LLC21$1.93K0.00%00.0%Unchanged
Barrett & Company, Inc.20$1.84K0.00%00.0%Unchanged
Atlantic Edge Private Wealth Management, LLC20$1.84K0.00%+20New
DiNuzzo Private Wealth, Inc.18$1.66K0.00%+6+50.0%Added
Cornerstone Planning Group LLC13$1.62K0.00%+4+44.4%Added
Central Trust Co17$1.56K0.00%+17New
Activest Wealth Management17$1.56K0.00%+1+6.3%Added
Annis Gardner Whiting Capital Advisors, LLC15$1.38K0.00%+15New
Creative Financial Designs Inc14$1.29K0.00%00.0%Unchanged
Bare Financial Services, Inc14$1.29K0.00%00.0%Unchanged
Hughes Financial Services, LLC13$1.20K0.00%00.0%Unchanged
Salomon & Ludwin, LLC12$1.17K0.00%00.0%Unchanged
CVA Family Office, LLC12$1.10K0.00%00.0%Unchanged
Quent Capital, LLC12$1.10K0.00%+1+9.1%Added
UMA Financial Services, Inc.12$1.10K0.00%+5+71.4%Added
Financial Management Professionals, Inc.11$1.01K0.00%00.0%Unchanged
Capital Advisors, Ltd. LLC10$1.00K0.00%00.0%Unchanged
Prestige Wealth Management Group LLC10$9190.00%00.0%Unchanged
Chilton Capital Management LLC10$9190.00%+10New
SJS Investment Consulting Inc.9$8280.00%00.0%Unchanged
Rachor Investment Advisory Services, LLC9$8280.00%+9New
Bay Harbor Wealth Management, LLC8$7350.00%+4+100.0%Added
Trust Co8$7350.00%+8New
South State Corp.6$5520.00%+6New
Basecamp Wealth Advisors LLC6$5510.00%+6New
Rialto Wealth Management, LLC5$4600.00%−2−28.6%Reduced
HFM Investment Advisors, LLC5$4600.00%00.0%Unchanged
DecisionPoint Financial, LLC5$4600.00%00.0%Unchanged
USA Financial Portformulas Corp5$4590.00%+5New
Godfrey Financial Associates, Inc.5$4590.00%+5New
IMA Wealth, Inc.4$3670.00%00.0%Unchanged
Dunhill Financial, LLC2$2110.00%+2New
Transamerica Financial Advisors, Inc.2$1840.00%+1+100.0%Added
Toronto Dominion Bank1$1340.00%+1New
Pinpoint Asset Management (Singapore) Pte. Ltd.1$920.00%−3,013−100.0%Reduced
TD Private Client Wealth LLC1$920.00%+1New
Quaker Wealth Management, LLC1$920.00%+1New
ROSS\JOHNSON & Associates LLC1$920.00%+1New
Analog Century Management LP0$00.00%−631,343−100.0%Sold out
Healthcare of Ontario Pension Plan Trust Fund0$00.00%−200,000−100.0%Sold out
Arrowstreet Capital, Limited Partnership0$00.00%−173,353−100.0%Sold out
CloudAlpha Capital Management Limited/Hong Kong0$00.00%−165,800−100.0%Sold out
Tairen Capital Ltd0$00.00%−103,073−100.0%Sold out
Lisanti Capital Growth, LLC0$00.00%−41,532−100.0%Sold out
Penserra Capital Management LLC0$00.00%−34,162−100.0%Sold out
Capital Fund Management S.A.0$00.00%−29,371−100.0%Sold out
Nomura Holdings Inc0$00.00%−27,046−100.0%Sold out
Jackson Creek Investment Advisors LLC0$00.00%−23,920−100.0%Sold out
IMC-Chicago, LLC0$00.00%−20,443−100.0%Sold out
Zacks Investment Management0$00.00%−19,110−100.0%Sold out
Cinctive Capital Management LP0$00.00%−16,315−100.0%Sold out
Baader Bank INC0$00.00%−11,042−100.0%Sold out
Hussman Strategic Advisors, Inc.0$00.00%−10,500−100.0%Sold out
Unique Wealth Strategies, LLC0$00.00%−8,025−100.0%Sold out
Beacon Pointe Advisors, LLC0$00.00%−7,500−100.0%Sold out
XTX Topco Ltd0$00.00%−6,221−100.0%Sold out
Neo Ivy Capital Management0$00.00%−5,770−100.0%Sold out
Polymer Capital Management (US) LLC0$00.00%−5,374−100.0%Sold out
K.J. Harrison & Partners Inc0$00.00%−5,000−100.0%Sold out
Empowered Funds, LLC0$00.00%−4,450−100.0%Sold out
WBI Investments0$00.00%−4,356−100.0%Sold out
Atom Investors LP0$00.00%−4,292−100.0%Sold out
NJ State Employees Deferred Compensation Plan0$00.00%−4,000−100.0%Sold out
Massar Capital Management, LP0$00.00%−3,600−100.0%Sold out
Mitsubishi UFJ Trust & Banking Corp0$00.00%−2,784−100.0%Sold out
Requisite Capital Management, LLC0$00.00%−2,522−100.0%Sold out
Blue Barn Wealth, LLC0$00.00%−2,500−100.0%Sold out
Keel Point, LLC0$00.00%−2,430−100.0%Sold out
St Germain D J Co Inc0$00.00%−2,245−100.0%Sold out
NewEdge Wealth, LLC0$00.00%−2,037−100.0%Sold out
Hilltop Holdings Inc.0$00.00%−2,049−100.0%Sold out
DRW Securities, LLC0$00.00%−2,026−100.0%Sold out
Johnson Investment Counsel Inc0$00.00%−1,986−100.0%Sold out
Juncture Wealth Strategies, LLC0$00.00%−1,980−100.0%Sold out
Chase Investment Counsel Corp0$00.00%−1,973−100.0%Sold out
Oppenheimer Asset Management Inc.0$00.00%−1,928−100.0%Sold out
Picton Mahoney Asset Management0$00.00%−1,285−100.0%Sold out
Wexford Capital LP0$00.00%−999−100.0%Sold out
Principal Securities, Inc.0$00.00%−730−100.0%Sold out
Advisory Services Network, LLC0$00.00%−685−100.0%Sold out
Ci Investments Inc.0$00.00%−661−100.0%Sold out
Credit Industriel Et Commercial0$00.00%−505−100.0%Sold out
Rise Advisors, LLC0$00.00%−405−100.0%Sold out
Wealthspire Advisors, LLC0$00.00%−323−100.0%Sold out