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RMBS — RAMBUS INC DEL

Reported value held$8.06B
Funds holding (latest)51
SectorTechnology
Funds holding (Q2 2026)37
Institutional value$6.72B · 54.14M sh
New / Add / Cut / Exit1 / 14 / 22 / 3
Top-5 / Top-10 concentration69.8% / 82.5%
Institutional holdings change Accumulating +16.0% (+7.48M sh)
Institutional value change Up +80.6%

As of Q2 2026, 37 SEC-registered investment managers reported holding RMBS (RAMBUS INC DEL) in their latest 13F filings, with a combined reported value of $6.72B across 54.14M shares. That is +16.0% by share count (+7.48M shares) versus the previous quarter, while reported value moved +80.6%. Ownership is concentrated: the five largest holders account for 69.8% of reported value and the top ten for 82.5%.

Compared with the prior quarter, 1 opened new positions, 14 added to existing stakes, 22 trimmed, 3 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

RMBS is classified in the Technology sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

Q2 2026 — 37 funds

FundSharesValuePortfolio WeightChange
BlackRock Inc history 13.96M $1.85B 0.03% Reduce
Fidelity Management & Research (FMR) history 10.46M $1.39B 0.07% Add
Invesco Ltd history 6.63M $880.39M 0.07% Add
Geode Capital Management history 2.30M $305.06M 0.02% Reduce
JPMorgan Chase & Co history 2.10M $260.99M 0.03% New
Norges Bank Investment Management history 1.53M $203.44M 0.02% Reduce
Morgan Stanley history 1.44M $191.71M 0.01% Add
Bank of America Corp history 1.22M $161.77M 0.01% Reduce
AQR Capital Management history 1.21M $152.48M 0.05% Reduce
Charles Schwab Investment Management history 1.11M $147.23M 0.02% Reduce
Goldman Sachs Group history 960.88K $127.55M 0.01% Add
Northern Trust Corp history 949.11K $125.99M 0.01% Reduce
Citadel Advisors history 877.75K $116.51M 0.01% Add
BNY Mellon history 828.23K $109.94M 0.02% Add
Manulife Financial history 797.20K $105.82M 0.09% Add
D. E. Shaw & Co history 739.70K $98.19M 0.05% Add
Citigroup Inc history 532.40K $70.67M 0.03% Reduce
Millennium Management history 513.72K $68.19M 0.03% Add
Principal Global Investors history 429.95K $57.07M 0.03% Add
Wellington Management Group history 418.53K $55.56M 0.01% Reduce
UBS Group AG history 388.19K $51.53M 0.01% Reduce
CPP Investments history 330.65K $43.89M 0.02% Add
CDPQ (Caisse de Depot) history 282.58K $37.51M 0.05% Reduce
Two Sigma Investments history 244.02K $32.39M 0.03% Add
Legal & General Investment Management America history 153.86K $20.39M 0.00% Reduce
Lazard Asset Management history 87.30K $11.59M 0.02% Reduce
Wells Fargo & Co history 83.66K $11.10M 0.00% Reduce
Franklin Resources history 74.03K $9.83M 0.00% Reduce
Marshall Wace history 56.42K $7.49M 0.01% Add
Deutsche Bank AG history 23.57K $3.13M 0.00% Reduce
Prudential Financial history 18.82K $2.50M 0.00% Reduce
PNC Financial Services history 15.33K $2.03M 0.00% Add
Amundi US history 14.70K $1.95M 0.00% Reduce
Maverick Capital history 4.31K $571.98K 0.01% Reduce
Bridgewater Associates history 3.87K $513.84K 0.00% Reduce
T. Rowe Price Associates history 3.33M $442.62K 0.05% Reduce
Fidelity International (FIL) history 3.33K $442.29K 0.00% Reduce

Q1 2026 — 38 funds

FundSharesValuePortfolio WeightChange
BlackRock Inc history 16.31M $1.40B 0.03% Hold
Invesco Ltd history 6.50M $559.11M 0.09% Add
Fidelity Management & Research (FMR) history 3.32M $285.49M 0.01% Add
Geode Capital Management history 3.12M $268.84M 0.02% Add
Bank of America Corp history 1.36M $117.14M 0.01% Add
Northern Trust Corp history 1.33M $114.77M 0.01% Add
Charles Schwab Investment Management history 1.33M $114.11M 0.02% Hold
Morgan Stanley history 1.21M $104.37M 0.01% Add
AQR Capital Management history 1.25M $103.96M 0.05% Add
Citigroup Inc history 1.01M $86.68M 0.04% Add
UBS Group AG history 972.87K $83.70M 0.01% Add
Goldman Sachs Group history 922.11K $79.33M 0.01% Reduce
Wellington Management Group history 856.60K $73.69M 0.01% Reduce
BNY Mellon history 779.88K $67.09M 0.01% Reduce
CDPQ (Caisse de Depot) history 448.60K $38.59M 0.06% Hold
Principal Global Investors history 373.54K $32.14M 0.02% Reduce
Janus Henderson Group history 358.89K $30.87M 0.01% Reduce
Franklin Resources history 323.36K $27.82M 0.01% Reduce
CPP Investments history 199.45K $17.16M 0.01% Reduce
Legal & General Investment Management America history 158.70K $13.65M 0.00% Reduce
Steadfast Capital Management history 153.25K $13.18M 0.45% New
Millennium Management history 146.31K $12.59M 0.01% Reduce
Wells Fargo & Co history 124.89K $10.74M 0.00% Reduce
Citadel Advisors history 117.59K $10.12M 0.00% Reduce
Deutsche Bank AG history 108.31K $9.32M 0.00% Add
Manulife Financial history 102.40K $8.81M 0.01% Reduce
Lazard Asset Management history 101.70K $8.75M 0.01% Reduce
Prudential Financial history 89.40K $7.69M 0.01% Reduce
Two Sigma Investments history 77.41K $6.66M 0.01% Reduce
Bridgewater Associates history 51.85K $4.46M 0.02% Reduce
Amundi US history 16.38K $1.41M 0.00% Add
Maverick Capital history 13.03K $1.12M 0.01% New
D. E. Shaw & Co history 12.80K $1.10M 0.00% Reduce
PNC Financial Services history 12.33K $1.06M 0.00% Reduce
Fidelity International (FIL) history 9.37K $805.76K 0.00% Reduce
Marshall Wace history 6.23K $535.62K 0.00% Reduce
T. Rowe Price Associates history 3.38M $290.50K 0.03% Reduce
Baron Funds history 3.11K $267.64K 0.00% New

Q4 2025 — 40 funds

FundSharesValuePortfolio WeightChange
BlackRock Inc history 16.28M $1.50B 0.03% Add
Vanguard Group history 12.29M $1.13B 0.02% Reduce
Invesco Ltd history 4.15M $381.22M 0.06% Add
Geode Capital Management history 2.84M $261.26M 0.02% Add
JPMorgan Chase & Co history 2.07M $189.78M 0.03% Reduce
Norges Bank Investment Management history 1.70M $156.36M 0.02% Reduce
Fidelity Management & Research (FMR) history 1.59M $145.83M 0.01% Add
Charles Schwab Investment Management history 1.33M $122.00M 0.02% Reduce
Northern Trust Corp history 1.32M $120.89M 0.01% Reduce
Bank of America Corp history 1.25M $114.83M 0.01% Reduce
Goldman Sachs Group history 1.19M $109.75M 0.01% Add
BNY Mellon history 1.09M $100.54M 0.02% Reduce
Wellington Management Group history 933.93K $85.82M 0.01% Add
Morgan Stanley history 885.09K $81.33M 0.01% Reduce
AQR Capital Management history 711.13K $65.35M 0.03% Add
Citigroup Inc history 502.54K $46.18M 0.02% Add
Franklin Resources history 485.81K $44.64M 0.01% Add
CPP Investments history 466.60K $42.88M 0.03% Add
UBS Group AG history 455.67K $41.87M 0.01% Reduce
CDPQ (Caisse de Depot) history 447.31K $41.10M 0.07% Add
Citadel Advisors history 438.20K $40.27M 0.01% Add
Principal Global Investors history 411.72K $37.83M 0.02% Reduce
Janus Henderson Group history 379.51K $34.87M 0.02% Reduce
PSP Investments history 305.21K $28.05M 0.09% New
Lazard Asset Management history 297.87K $27.37M 0.05% Hold
Millennium Management history 290.58K $26.70M 0.01% Add
Wells Fargo & Co history 216.91K $19.93M 0.00% Add
Prudential Financial history 213.64K $19.63M 0.02% Reduce
Legal & General Investment Management America history 177.60K $16.32M 0.00% Reduce
Bridgewater Associates history 154.30K $14.18M 0.05% Reduce
Two Sigma Investments history 144.40K $13.27M 0.02% Add
Manulife Financial history 113.99K $10.49M 0.01% Reduce
Deutsche Bank AG history 97.20K $8.93M 0.00% Reduce
Point72 Asset Management history 30.02K $2.76M 0.00% Reduce
D. E. Shaw & Co history 18.49K $1.70M 0.00% Reduce
Marshall Wace history 16.30K $1.50M 0.00% New
PNC Financial Services history 12.97K $1.19M 0.00% Add
Amundi US history 12.37K $1.14M 0.00% Add
Fidelity International (FIL) history 11.77K $1.08M 0.00% New
T. Rowe Price Associates history 5.39M $494.88K 0.05% Add

Q3 2025 — 37 funds

FundSharesValuePortfolio WeightChange
BlackRock Inc history 15.81M $1.65B 0.03% Add
Vanguard Group history 12.70M $1.32B 0.02% Add
Geode Capital Management history 2.75M $286.43M 0.02% Add
JPMorgan Chase & Co history 2.56M $266.42M 0.03% Reduce
Invesco Ltd history 2.43M $253.42M 0.04% Add
BNY Mellon history 1.60M $166.55M 0.03% Reduce
Bank of America Corp history 1.55M $161.58M 0.01% Add
Northern Trust Corp history 1.39M $144.41M 0.02% Reduce
Fidelity Management & Research (FMR) history 1.37M $143.12M 0.01% Add
Charles Schwab Investment Management history 1.34M $139.51M 0.02% Add
Goldman Sachs Group history 1.19M $123.70M 0.01% Add
Morgan Stanley history 1.07M $111.06M 0.01% Reduce
Wellington Management Group history 750.45K $78.20M 0.01% Reduce
UBS Group AG history 565.80K $58.96M 0.01% Add
AQR Capital Management history 547.60K $57.06M 0.04% Reduce
Principal Global Investors history 472.97K $49.28M 0.03% Reduce
Franklin Resources history 472.35K $49.22M 0.01% Add
Citadel Advisors history 386.00K $40.22M 0.01% Reduce
Janus Henderson Group history 384.00K $40.01M 0.02% Add
CDPQ (Caisse de Depot) history 380.60K $39.66M 0.07% Add
Citigroup Inc history 370.34K $38.59M 0.02% Add
Lazard Asset Management history 298.93K $31.15M 0.04% Add
CPP Investments history 254.60K $26.53M 0.02% Add
Prudential Financial history 221.02K $23.03M 0.03% Reduce
Legal & General Investment Management America history 219.71K $22.89M 0.01% Reduce
Millennium Management history 215.43K $22.45M 0.01% Reduce
Wells Fargo & Co history 180.98K $18.86M 0.00% Add
Bridgewater Associates history 175.11K $18.25M 0.07% Reduce
Arrowstreet Capital history 173.35K $18.06M 0.01% New
Point72 Asset Management history 166.67K $17.37M 0.03% New
Deutsche Bank AG history 125.94K $13.12M 0.01% Reduce
Manulife Financial history 115.37K $12.02M 0.01% Reduce
D. E. Shaw & Co history 86.10K $8.97M 0.01% Add
Two Sigma Investments history 77.89K $8.12M 0.01% Reduce
PNC Financial Services history 12.01K $1.25M 0.00% Reduce
Amundi US history 7.61K $768.71K 0.00% Hold
T. Rowe Price Associates history 5.25M $546.57K 0.06% Add

Q2 2025 — 38 funds

FundSharesValuePortfolio WeightChange
BlackRock Inc history 15.00M $960.31M 0.02% Add
Vanguard Group history 12.56M $804.14M 0.01% Add
JPMorgan Chase & Co history 3.18M $203.61M 0.03% Reduce
Geode Capital Management history 2.69M $172.09M 0.01% Add
Invesco Ltd history 2.32M $148.66M 0.03% Reduce
BNY Mellon history 2.02M $129.29M 0.03% Add
Norges Bank Investment Management history 1.97M $126.27M 0.02% Add
Northern Trust Corp history 1.39M $89.22M 0.01% Reduce
Charles Schwab Investment Management history 1.29M $82.40M 0.01% Add
Wellington Management Group history 1.21M $77.26M 0.01% Add
Morgan Stanley history 1.16M $74.47M 0.01% Add
AQR Capital Management history 701.75K $44.93M 0.04% Add
Goldman Sachs Group history 659.61K $42.23M 0.01% Reduce
Bank of America Corp history 523.89K $33.54M 0.00% Add
Principal Global Investors history 516.02K $33.04M 0.02% Add
Citadel Advisors history 441.80K $28.28M 0.01% Add
Franklin Resources history 427.95K $27.40M 0.01% Add
Millennium Management history 418.51K $26.79M 0.01% Add
Fidelity Management & Research (FMR) history 338.26K $21.66M 0.00% Add
Prudential Financial history 263.37K $16.86M 0.02% Add
Legal & General Investment Management America history 230.20K $14.74M 0.00% Hold
Bridgewater Associates history 226.87K $14.52M 0.06% Add
Janus Henderson Group history 213.40K $13.66M 0.01% Add
Wells Fargo & Co history 170.64K $10.92M 0.00% Add
Citigroup Inc history 150.13K $9.61M 0.01% Add
CPP Investments history 141.50K $9.06M 0.01% Add
UBS Group AG history 140.44K $8.99M 0.00% Add
Two Sigma Investments history 131.65K $8.43M 0.02% Reduce
Deutsche Bank AG history 127.81K $8.18M 0.00% Reduce
Manulife Financial history 121.21K $7.76M 0.01% Reduce
Royce & Associates history 64.17K $4.11M 0.04% Reduce
D. E. Shaw & Co history 52.53K $3.36M 0.00% Reduce
Polen Capital Management history 20.14K $1.29M 0.00% Reduce
PNC Financial Services history 15.13K $968.37K 0.00% Hold
CDPQ (Caisse de Depot) history 13.38K $856.52K 0.00% New
Amundi US history 7.61K $494.71K 0.00% Add
T. Rowe Price Associates history 4.69M $300.47K 0.03% Reduce
Lazard Asset Management history 214.44K $13.73K 0.02% Add

Q1 2025 — 38 funds

FundSharesValuePortfolio WeightChange
BlackRock Inc history 14.24M $737.10M 0.02% Add
Vanguard Group history 12.44M $644.21M 0.01% Reduce
Invesco Ltd history 4.53M $234.65M 0.04% Reduce
JPMorgan Chase & Co history 3.65M $188.84M 0.03% Reduce
Geode Capital Management history 2.65M $137.34M 0.01% Add
BNY Mellon history 1.78M $92.38M 0.02% Reduce
Northern Trust Corp history 1.42M $73.55M 0.01% Reduce
Charles Schwab Investment Management history 1.26M $65.05M 0.01% Add
Wellington Management Group history 1.19M $61.82M 0.01% Reduce
Morgan Stanley history 938.03K $48.57M 0.00% Add
Goldman Sachs Group history 672.98K $34.84M 0.01% Reduce
Principal Global Investors history 506.71K $26.24M 0.01% Add
Bank of America Corp history 396.72K $20.54M 0.00% Reduce
Franklin Resources history 374.38K $19.38M 0.01% Reduce
Two Sigma Investments history 313.17K $16.21M 0.04% Reduce
Citadel Advisors history 302.67K $15.67M 0.00% Reduce
Prudential Financial history 257.26K $13.32M 0.02% Reduce
Millennium Management history 236.09K $12.22M 0.01% Reduce
AQR Capital Management history 239.63K $12.22M 0.01% Reduce
Legal & General Investment Management America history 229.93K $11.90M 0.00% Reduce
Janus Henderson Group history 190.32K $10.22M 0.01% Reduce
Deutsche Bank AG history 192.83K $9.98M 0.00% Add
Royce & Associates history 179.91K $9.31M 0.10% Add
CPP Investments history 140.70K $7.28M 0.01% Reduce
Manulife Financial history 126.05K $6.53M 0.01% Reduce
UBS Group AG history 122.68K $6.35M 0.00% Hold
Citigroup Inc history 111.95K $5.80M 0.00% Reduce
Wells Fargo & Co history 109.34K $5.66M 0.00% Add
Polen Capital Management history 109.12K $5.65M 0.02% Add
Bridgewater Associates history 78.08K $4.04M 0.02% Add
D. E. Shaw & Co history 56.76K $2.94M 0.00% Reduce
Fidelity Management & Research (FMR) history 42.57K $2.20M 0.00% Reduce
Renaissance Technologies history 22.90K $1.19M 0.00% Add
PNC Financial Services history 15.17K $785.38K 0.00% Reduce
T. Rowe Price Associates history 8.75M $452.87K 0.06% Add
Amundi US history 4.72K $218.06K 0.00% Reduce
Ontario Teachers Pension Plan history 4.13K $214.09K 0.00% Reduce
Lazard Asset Management history 108.58K $5.62K 0.01% Add

View all 51 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023Q2 2023Q1 2023Q4 2022Q3 2022Q2 2022Q1 2022Q4 2021Q3 2021
BlackRock Inc 13.96M 16.31M 16.28M 15.81M 15.00M 14.24M 14.14M 13.69M — — — — — — — — — — — —
Fidelity Management & Research (FMR) 10.46M 3.32M 1.59M 1.37M 338.26K 42.57K 79.48K 62.73K 730.33K 913.22K 327.09K 313.25K 552.06K 714.51K 4.97K 6.00K 3.90K 3.72K 154 154
Invesco Ltd 6.63M 6.50M 4.15M 2.43M 2.32M 4.53M 5.00M 2.91M 1.72M 1.42M 1.37M 1.30M 1.89M 927.48K 775.36K 826.02K 813.49K 822.03K 1.03M 863.33K
Geode Capital Management 2.30M 3.12M 2.84M 2.75M 2.69M 2.65M 2.58M 2.62M 2.60M 2.49M 2.43M 2.31M 2.22M 2.11M 2.01M 1.99M 1.97M 1.98M 1.92M 1.85M
JPMorgan Chase & Co 2.10M — 2.07M 2.56M 3.18M 3.65M 4.18M 4.12M 6.59M 6.50M 5.30M 4.79M 4.18M 3.62M 423.21K 814.84K 532.63K 605.86K 832.04K 746.56K
Norges Bank Investment Management 1.53M — 1.70M — 1.97M — 1.79M — 1.29M — 1.24M — — — 1.16M — — — — —
Morgan Stanley 1.44M 1.21M 885.09K 1.07M 1.16M 938.03K 914.75K 1.59M 826.23K 816.14K 970.39K 1.05M 1.51M 983.12K 1.03M 996.83K 1.03M 722.22K 843.49K 569.98K
Bank of America Corp 1.22M 1.36M 1.25M 1.55M 523.89K 396.72K 415.32K 665.72K 847.54K 983.32K 579.51K 635.22K 203.20K 243.39K 321.54K 265.75K 278.35K 386.41K 372.61K 312.93K
AQR Capital Management 1.21M 1.25M 711.13K 547.60K 701.75K 239.63K 319.73K 362.25K 572.93K 86.85K 55.35K 69.38K 130.99K 36.44K 42.35K 46.52K 45.54K 43.95K 60.11K 48.14K
Charles Schwab Investment Management 1.11M 1.33M 1.33M 1.34M 1.29M 1.26M 1.25M 1.24M 1.25M 1.21M 1.18M 1.21M 836.33K 812.33K 808.01K 804.79K 779.59K 790.77K 774.46K 755.38K
Goldman Sachs Group 960.88K 922.11K 1.19M 1.19M 659.61K 672.98K 1.05M 820.86K 919.39K 1.17M 858.44K 725.14K 300.21K 375.51K 359.47K 581.44K 452.14K 403.16K 896.19K 286.85K
Northern Trust Corp 949.11K 1.33M 1.32M 1.39M 1.39M 1.42M 1.46M 1.29M 1.30M 1.45M 1.63M 1.52M 1.51M 1.58M 1.58M 1.59M 1.58M 1.57M 1.62M 1.67M
Citadel Advisors 877.75K 117.59K 438.20K 386.00K 441.80K 302.67K 403.00K 486.75K 306.50K 399.37K 514.75K 760.75K 668.75K 340.70K 143.70K 148.50K 136.40K 199.16K 196.53K 196.20K
BNY Mellon 828.23K 779.88K 1.09M 1.60M 2.02M 1.78M 2.10M 2.16M 2.24M 2.31M 2.17M 1.99M 1.13M 1.03M 1.08M 1.16M 1.12M 1.17M 1.19M 1.01M
Manulife Financial 797.20K 102.40K 113.99K 115.37K 121.21K 126.05K 128.15K 127.16K 131.65K 131.59K 128.11K 69.66K 44.25K 43.63K 42.97K 43.62K 44.23K 44.56K 54.98K 55.77K
D. E. Shaw & Co 739.70K 12.80K 18.49K 86.10K 52.53K 56.76K 394.35K 800.70K 53.30K 76.53K 140.13K 250.01K 662.49K 1.25M 1.33M 1.27M 1.30M 1.36M 1.43M 1.50M
Citigroup Inc 532.40K 1.01M 502.54K 370.34K 150.13K 111.95K 117.20K 112.92K 677.57K 532.92K 204.57K 270.41K 118.23K 73.26K 88.59K 99.20K 79.16K 127.28K 130.02K 90.02K
Millennium Management 513.72K 146.31K 290.58K 215.43K 418.51K 236.09K 595.05K 936.60K 37.26K 24.25K 1.87M 202.06K 483.59K 789.48K 475.68K 10.07K 571.00K 565.36K 778.03K 860.48K
Principal Global Investors 429.95K 373.54K 411.72K 472.97K 516.02K 506.71K 330.13K 325.41K 424.38K 543.54K 876.41K 926.40K 939.30K 663.53K 679.73K 710.43K 760.82K 730.78K 737.96K 751.84K
Wellington Management Group 418.53K 856.60K 933.93K 750.45K 1.21M 1.19M 1.25M 1.46M 6.20M 4.12M 3.93M 1.78M 1.87M 2.47M 2.73M 2.65M 2.39M 2.25M 2.39M 2.39M

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