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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.

Q1 2026 vs. Q4 2025

How the institutions holding Rambus Inc changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of RMBS: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders5548557+11
Shares99.8M14.1M102.8M+17.0M (+19.8%)
Value$9.18B$1.29B$8.83B+$938.8M (+11.9%)

8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (85)

Institutions that held Rambus Inc at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to RMBS in Q1 2026
InstitutionSharesValue% of portfolio
Vanguard Portfolio Management LLC6,644,320$571.6M0.03%
Vanguard Capital Management LLC4,827,854$415.3M0.01%
Vanguard Fiduciary Trust Co749,880$64.5M0.02%
PointState Capital LP701,307$60.3M1.40%
Clearbridge Investments, LLC583,270$50.2M0.04%
Champlain Investment Partners, LLC357,223$30.7M0.39%
Shannon River Fund Management LLC333,817$28.7M5.48%
TimesSquare Capital Management, LLC312,360$26.9M0.46%
Steadfast Capital Management LP153,250$13.2M0.50%
Tairen Capital Ltd120,000$10.3M1.12%
DF Dent & Co Inc101,865$8.76M0.17%
Alight Capital Management LP100,000$8.60M2.50%
Vanguard Asset Management, Ltd97,189$8.36M0.01%
Allianz Asset Management GmbH89,106$7.67M0.01%
Munro Partners64,395$5.54M0.19%
Loup Funds, LLC58,036$4.99M3.16%
Penserra Capital Management LLC57,161$4.92M0.06%
Holocene Advisors, LP49,604$4.27M0.01%
AI-Squared Management Ltd49,578$4.27M3.10%
Vanguard Global Advisers, LLC47,982$4.13M0.00%
Raiffeisen Bank International AG48,000$3.83M0.06%
Future Fund LLC34,386$2.96M1.04%
Emerald Investment Advisers, LLC28,090$2.42M0.22%
Vanguard Investments Australia, Ltd.26,807$2.31M0.01%
CWA Asset Management Group, LLC23,967$2.06M0.07%
Element Squared LLC23,567$2.03M1.14%
Capstone Capital Management Ltd23,326$2.01M2.02%
Independent Solutions Wealth Management, LLC22,574$1.94M0.29%
XTX Topco Ltd21,202$1.82M0.03%
Meiji Yasuda Life Insurance Co15,300$1.32M0.04%
Maverick Capital LtdSuperinvestorMaverick Capital13,028$1.12M0.01%
RE Advisers Corp13,000$1.12M0.03%
Allstate Corp12,460$1.07M0.01%
Sunstone Asset Management, L.P.11,746$1.01M1.19%
E Fund Management Co., Ltd.11,596$997.6K0.03%
Defiance ETFs, LLC11,439$984.1K0.01%
Empowered Funds, LLC8,443$726.4K0.00%
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main7,316$629.4K0.00%
Wincap Financial LLC6,658$572.8K0.38%
Beacon Pointe Advisors, LLC6,231$536.1K0.00%
Monolith Management Ltd6,200$533.4K0.21%
CIBC Bancorp USA Inc.5,922$509.5K0.00%
Marex Group plc5,634$484.7K0.01%
CenterBook Partners LP5,412$465.6K0.03%
DnB Asset Management AS5,233$450.2K0.00%
QVT Financial LP4,648$399.9K0.03%
Qsemble Capital Management, LP4,529$389.6K0.03%
Savvy Advisors, Inc.4,308$370.6K0.01%
Cim Investment Mangement Inc4,072$350.3K0.09%
Resonant Capital Advisors, LLC3,819$328.5K0.02%
Ground Swell Capital, LLC3,613$310.8K0.61%
Sanchez Gaunt Capital Management, LLC3,329$286.4K0.18%
Blackstone Group Inc.3,314$285.1K0.00%
Focused Alpha, LLC3,269$281.2K0.09%
Oppenheimer Asset Management Inc.3,221$277.1K0.00%
Bamco Inc3,111$267.6K0.00%
Winton Group Ltd3,051$262.5K0.01%
Chase Investment Counsel Corp3,018$259.0K0.07%
Centiva Capital, LP2,995$257.7K0.01%
Ami Asset Management Corp2,950$253.8K0.02%
Stoneridge Investment Partners LLC2,548$219.0K0.16%
Everhart Financial Group, Inc.2,428$208.9K0.02%
Byrne Asset Management LLC1,237$106.4K0.06%
Clear Street Markets LLC800$68.8K0.03%
Advisory Services Network, LLC665$57.2K0.00%
Wall Street Financial Group, Inc.268$23.1K0.01%
Mather Group, LLC.204$17.6K0.00%
Innovative Asset Advisors Group, LLC126$10.8K0.01%
Cedar Mountain Advisors, LLC115$9.89K0.00%
Crews Bank & Trust59$5.08K0.00%
Raleigh Capital Management Inc.21$1.81K0.00%
Armstrong Advisory Group, Inc19$1.64K0.00%
Twin Peaks Wealth Advisors, LLC19$1.64K0.00%
Marquette Asset Management, LLC16$1.38K0.00%
JPL Wealth Management, LLC15$1.29K0.00%
North Star Investment Management Corp.13$1.12K0.00%
Operose Advisors LLC11$9460.00%
Silicon Valley Capital Partners10$8600.00%
Dogwood Wealth Management LLC10$8600.00%
Vermillion Wealth Management, Inc.6$5160.00%
Intentional Wealth Strategies, LLC5$4300.00%
Curio Wealth, LLC3$2580.00%
Principia Wealth Advisory, LLC2$1720.00%
AdvisorNet Financial, Inc1$860.00%
Raffa Wealth Management, LLC1$860.00%

Sold out (74)

Institutions that held Rambus Inc at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of RMBS in Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
William Blair Investment Management, LLC316,397$29.1M
Public Sector Pension Investment Board305,209$28.0M
Tudor Investment Corp Et Al101,605$9.34M
Castleark Management LLC95,578$8.78M
Hillsdale Investment Management Inc.88,990$8.18M
Trexquant Investment LP74,943$6.89M
EAM Investors, LLC60,957$5.60M
Erste Asset Management GmbH55,600$5.23M
M37 Management LP50,000$4.59M
Two Sigma Advisers, LP46,700$4.29M
Point72 Asset Management, L.P.30,021$2.76M
F/M Investments LLC26,710$2.45M
Skandinaviska Enskilda Banken AB (publ)24,177$2.22M
PEAK6 LLC17,648$1.62M
Epoch Investment Partners, Inc.17,603$1.62M
GF Fund Management Co. Ltd.15,975$1.47M
Credit Agricole S A15,114$1.39M
Campbell & CO Investment Adviser LLC14,091$1.29M
Entropy Technologies, LP12,810$1.18M
Edgestream Partners, L.P.11,739$1.08M
Encompass More Asset Management10,349$951.0K
Eventide Asset Management, LLC10,330$949.2K
Vestmark Advisory Solutions, Inc.9,992$918.2K
FirstWave Capital Management LLC9,933$912.7K
GTS Securities LLC9,846$904.7K
Sigma Planning Corp9,460$870.6K
Diametric Capital, LP6,991$642.4K
Axq Capital, LP6,742$619.5K
Integrated Advisors Network LLC6,475$595.0K
Calamos Advisors LLC6,316$580.4K
VGI Partners Ltd6,000$551.3K
Qube Research & Technologies Ltd5,648$519.0K
Squarepoint Ops LLC5,496$505.0K
CoreCap Advisors, LLC4,367$401.3K
Verition Fund Management LLC4,091$375.9K
Forum Financial Management, LP3,891$357.5K
Simplex Trading, LLC3,884$356.9K
Oak Ridge Investments LLC3,828$351.8K
Freestone Grove Partners LP3,574$328.4K
Schonfeld Strategic Advisors LLC3,505$322.1K
Occudo Quantitative Strategies LP3,494$321.1K
City Center Advisors, LLC3,338$306.7K
Journey Retirement Planning & Investment Management LLC3,312$304.3K
Adams Wealth Management3,018$281.2K
CacheTech Inc.3,018$281.2K
Colony Group, LLC2,928$269.1K
Virtu Financial LLC2,756$253.0K
VARCOV Co.2,672$245.5K
Aigen Investment Management, LP2,636$242.2K
Twinbeech Capital LP2,600$238.9K
Net Worth Advisory Group2,576$236.7K
Jag Capital Management, LLC2,563$235.5K
Quest Partners LLC2,378$218.5K
Argent Trust Co2,206$202.7K
Kestra Advisory Services, LLC2,087$191.8K
Flagship Wealth Advisors, LLC700$64.3K
Migdal Insurance & Financial Holdings Ltd.548$50.0K
Twin Tree Management, LP455$41.8K
Torren Management, LLC280$25.7K
Meeder Asset Management Inc243$22.3K
Macquarie Group Ltd163$15.0K
Aster Capital Management (DIFC) Ltd131$12.0K
Quarry LP105$9.65K
SageView Advisory Group, LLC74$6.80K
Optima Capital LLC32$2.94K
Battery Global Advisors, LLC32$2.94K
Elyxium Wealth, LLC28$2.57K
Atlantic Edge Private Wealth Management, LLC20$1.84K
Annis Gardner Whiting Capital Advisors, LLC15$1.38K
South State Corp.6$552
Toronto Dominion Bank1$134
TD Private Client Wealth LLC1$92
Quaker Wealth Management, LLC1$92
ROSS\JOHNSON & Associates LLC1$92

Not filed for Q1 2026 yet (8)

Institutions that held Rambus Inc at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding RMBS in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc12,290,929$1.13B
Norges Bank1,701,551$156.4M
Comerica Bank30,625$2.81M
Meritage Portfolio Management27,432$2.52M
CIBC World Markets Corp7,143$656.4K
Global Retirement Partners, LLC5,460$501.7K
CIBC Private Wealth Group, LLC360$33.1K
Maryland Capital Advisors Inc.256$23.5K