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Livermore
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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; 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, Q3 2025

Institutional positions in Rambus Inc as of Sep 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
513
+62 vs. Q2 2025
Shares held
98.8M
+3.82M (+4.0%) vs. Q2 2025
Total value
$10.3B
+$4.21B (+69.3%) vs. Q2 2025
New holders
123
169 more added
Sold out
61
163 more reduced

8 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 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 holdersQ3 2025: 513 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: 620 institutions
Value heldQ3 2025: $10.3B
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 2026620$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, Q3 2025

Shares, value and share of portfolio for each institution holding Rambus Inc; share changes are against Q2 2025.

Institutions holding RMBS in Q3 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Transamerica Financial Advisors, Inc.1$1040.00%+1New
Tortoise Investment Management, LLC2$2080.00%+2New
Cornerstone Planning Group LLC9$3110.00%−4−30.8%Reduced
Bay Harbor Wealth Management, LLC4$4160.00%+1+33.3%Added
IMA Wealth, Inc.4$4170.00%00.0%Unchanged
DecisionPoint Financial, LLC5$5160.00%00.0%Unchanged
HFM Investment Advisors, LLC5$5210.00%+2+66.7%Added
UMA Financial Services, Inc.7$7300.00%00.0%Unchanged
Rialto Wealth Management, LLC7$7300.00%+4+133.3%Added
DiNuzzo Private Wealth, Inc.12$8860.00%−1−7.7%Reduced
SJS Investment Consulting Inc.9$9380.00%+2+28.6%Added
Capital Advisors, Ltd. LLC10$1.00K0.00%00.0%Unchanged
Cloud Capital Management, LLC19$1.00K0.00%+19New
Prestige Wealth Management Group LLC10$1.04K0.00%00.0%Unchanged
Financial Management Professionals, Inc.11$1.15K0.00%00.0%Unchanged
Quent Capital, LLC11$1.15K0.00%+11New
Salomon & Ludwin, LLC12$1.20K0.00%+12New
CVA Family Office, LLC12$1.25K0.00%00.0%Unchanged
Montag A & Associates Inc12$1.25K0.00%+12New
Hughes Financial Services, LLC13$1.44K0.00%00.0%Unchanged
Creative Financial Designs Inc14$1.46K0.00%00.0%Unchanged
Bare Financial Services, Inc14$1.46K0.00%00.0%Unchanged
Marquette Asset Management, LLC14$1.46K0.00%+14New
JPL Wealth Management, LLC15$1.56K0.00%+15New
Activest Wealth Management16$1.67K0.00%00.0%Unchanged
Legacy Wealth Managment, LLC16$1.67K0.00%−17−51.5%Reduced
Barrett & Company, Inc.20$2.08K0.00%+20New
Bogart Wealth, LLC21$2.19K0.00%00.0%Unchanged
CBIZ Investment Advisory Services, LLC21$2.19K0.00%+21New
Manchester Capital Management LLC21$2.19K0.00%+21New
Atlantic Trust, LLC25$2.60K0.00%00.0%Unchanged
High Note Wealth, LLC25$2.60K0.00%00.0%Unchanged
MV Capital Management, Inc.27$2.81K0.00%00.0%Unchanged
Toth Financial Advisory Corp28$2.92K0.00%00.0%Unchanged
Avion Wealth33$3.00K0.00%−1−2.9%Reduced
Mather Group, LLC.33$3.44K0.00%+33New
Sachetta, LLC42$4.38K0.00%00.0%Unchanged
Whittier Trust Co46$4.60K0.00%+46New
Wolff Wiese Magana LLC49$5.11K0.00%00.0%Unchanged
Financial Network Wealth Advisors LLC52$5.42K0.01%00.0%Unchanged
Colonial Trust Co53$5.52K0.00%−18−25.4%Reduced
Brown Brothers Harriman & Co56$5.83K0.00%00.0%Unchanged
Bell Investment Advisors, Inc65$6.77K0.00%−9−12.2%Reduced
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.65$6.77K0.00%00.0%Unchanged
First Horizon Corp68$7.09K0.00%+68New
GPS Wealth Strategies Group, LLC70$7.29K0.00%00.0%Unchanged
Fortitude Family Office, LLC72$7.50K0.00%+9+14.3%Added
TD Waterhouse Canada Inc.75$7.73K0.00%00.0%Unchanged
JFS Wealth Advisors, LLC76$7.92K0.00%+13+20.6%Added
Private Trust Co NA80$8.34K0.00%00.0%Unchanged
MJT & Associates Financial Advisory Group, Inc.82$8.54K0.01%+82New
Private Wealth Management Group, LLC88$9.17K0.00%00.0%Unchanged
Sunbelt Securities, Inc.94$9.79K0.00%+94New
Farmers & Merchants Investments Inc97$10.1K0.00%+7+7.8%Added
First Pacific Financial97$10.1K0.00%−7−6.7%Reduced
Geneos Wealth Management Inc.100$10.4K0.00%00.0%Unchanged
Spire Wealth Management101$10.5K0.00%+1+1.0%Added
Hemington Wealth Management110$11.0K0.00%+47+74.6%Added
Huntington National Bank107$11.1K0.00%−12−10.1%Reduced
Fairscale Capital, LLC132$13.8K0.01%00.0%Unchanged
Key Financial Inc137$14.1K0.00%00.0%Unchanged
Parkside Financial Bank & Trust149$15.5K0.00%+86+136.5%Added
Crewe Advisors LLC180$18.8K0.00%+180New
Root Financial Partners, LLC190$19.8K0.00%+190New
Aventura Private Wealth, LLC199$20.7K0.01%00.0%Unchanged
Cullen/Frost Bankers, Inc.209$21.8K0.00%+17+8.9%Added
Rothschild Investment LLC235$24.5K0.00%00.0%Unchanged
Steigerwald, Gordon & Koch Inc.236$24.6K0.00%+236New
Maryland Capital Advisors Inc.256$26.7K0.01%00.0%Unchanged
Sterling Capital Management LLC262$27.3K0.00%+1+0.4%Added
Abound Wealth Management265$27.6K0.01%+265New
Essential Partners LLC271$28.2K0.01%+34+14.3%Added
Whittier Trust Co of Nevada Inc294$29.4K0.00%−70−19.2%Reduced
Tradewinds Capital Management, LLC296$30.8K0.01%00.0%Unchanged
PenderFund Capital Management Ltd.305$31.8K0.01%−296−49.3%Reduced
Wealthspire Advisors, LLC323$33.7K0.00%+323New
Private Wealth Asset Management, LLC339$35.3K0.00%00.0%Unchanged
Steward Partners Investment Advisory, LLC343$35.7K0.00%+343New
Rise Advisors, LLC405$42.2K0.02%00.0%Unchanged
True Wealth Design, LLC420$43.8K0.01%00.0%Unchanged
Federation des caisses Desjardins du Quebec430$44.8K0.00%00.0%Unchanged
IFP Advisors, Inc447$46.6K0.00%+252+129.2%Added
Banque Cantonale Vaudoise491$51.0K0.00%00.0%Unchanged
Massmutual Trust Co FSB491$51.2K0.00%+16+3.4%Added
Bartlett & Co. Wealth Management LLC500$52.1K0.00%00.0%Unchanged
CIBC Private Wealth Group, LLC505$52.6K0.00%+466+1,194.9%Added
Credit Industriel Et Commercial505$52.6K0.01%+505New
GWM Advisors LLC594$61.9K0.00%−8,011−93.1%Reduced
Ci Investments Inc.661$69.0K0.00%+187+39.5%Added
Covestor Ltd675$70.0K0.04%+214+46.4%Added
Advisory Services Network, LLC685$71.4K0.00%+685New
Flagship Wealth Advisors, LLC700$72.9K0.02%+700New
Orion Capital Management LLC703$73.3K0.03%00.0%Unchanged
Principal Securities, Inc.730$76.1K0.00%−271−27.1%Reduced
Daiwa Securities Group Inc.740$77.0K0.00%+740New
Optiver Holding B.V.748$77.9K0.00%−199−21.0%Reduced
State of Wyoming835$87.0K0.01%+11+1.3%Added
Wexford Capital LP999$104.1K0.03%+999New
Farther Finance Advisors, LLC1,045$108.9K0.00%+167+19.0%Added
BNP PARIBAS ASSET MANAGEMENT Holding S.A.1,100$115.0K0.00%+11+1.0%Added