RAMBUS INC DEL (RMBS)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
579
Reporting holders
$13.1B
Reported value
88.2%
Of shares outstanding
3.5%
Held as options
+61
Holder change
Institutions report 95,629,194 shares against 108,461,603 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $1.9B | 13,964,477 | 0.03% | 8q | -14.4%-$310.7M |
| FMR LLC | $1.4B | 10,460,026 | 0.06% | 22q | +215.2%+$948.0M |
| Invesco Ltd. | $880.4M | 6,632,458 | 0.07% | 31q | +2.1%+$17.7M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $805.5M | 6,068,516 | 0.04% | 2q | -8.7%-$76.4M |
| VANGUARD CAPITAL MANAGEMENT LLC | $647.0M | 4,874,385 | 0.01% | 2q | +1.0%+$6.2M |
| STATE STREET CORP | $519.5M | 3,915,113 | 0.02% | 31q | -10.5%-$60.8M |
| GEODE CAPITAL MANAGEMENT, LLC | $305.1M | 2,297,660 | 0.02% | 31q | -26.5%-$109.8M |
| JPMORGAN CHASE & CO | $261.0M | 2,101,418 | 0.01% | 31q | +14.4%+$32.9M |
| DIMENSIONAL FUND ADVISORS LP | $228.2M | 1,719,400 | 0.04% | 31q | -4.2%-$10.1M |
| Swedbank AB | $218.6M | 1,646,500 | 0.19% | 13q | +5.3%+$11.1M |
| NORGES BANK | $203.4M | 1,532,622 | 0.02% | 32q | -9.9%-$22.4M |
| MORGAN STANLEY | $191.7M | 1,444,281 | 0.01% | 35q | +19.0%+$30.7M |
| NEUBERGER BERMAN GROUP LLC | $173.4M | 1,311,777 | 0.12% | 31q | +0.7%+$1.3M |
| BANK OF AMERICA CORP /DE/ | $161.8M | 1,218,726 | 0.01% | 31q | -10.5%-$19.0M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $154.1M | 555,935 | 0.01% | 31q | +547.8%+$130.3M |
| AQR CAPITAL MANAGEMENT LLC | $152.5M | 1,211,009 | 0.05% | 30q | -3.2%-$5.0M |
| PointState Capital LP | $147.9M | 764,172 | 1.89% | 2q | +9.0%+$12.2M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $147.2M | 1,109,132 | 0.02% | 31q | -16.4%-$28.8M |
| Sixth Street Partners Management Company, L.P. | $147.2M | 1,109,132 | 0.02% | new | NEW |
| EdgePoint Investment Group Inc. | $144.2M | 1,086,213 | 1.09% | 6q | -44.2%-$114.4M |
| JANE STREET GROUP, LLC | $143.0M | 95,013 | 0.01% | 16q | +1651.1%+$134.9M |
| Rafferty Asset Management, LLC | $130.7M | 984,388 | 0.30% | 4q | +32.0%+$31.7M |
| GOLDMAN SACHS GROUP INC | $127.5M | 960,878 | 0.01% | 31q | +4.2%+$5.1M |
| NORTHERN TRUST CORP | $126.0M | 949,113 | 0.01% | 31q | -28.9%-$51.1M |
| CITADEL ADVISORS LLC | $116.5M | 400,151 | 0.01% | 31q | +2325.9%+$111.7M |
| Bank of New York Mellon Corp | $109.9M | 828,233 | 0.02% | 31q | +6.2%+$6.4M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $105.8M | 797,195 | 0.08% | 31q | +678.5%+$92.2M |
| CONGRESS ASSET MANAGEMENT CO | $103.3M | 777,993 | 0.64% | 7q | -39.0%-$66.1M |
| D. E. Shaw & Co., Inc. | $98.2M | 739,701 | 0.05% | 31q | +5676.7%+$96.5M |
| Fisher Asset Management, LLC | $93.7M | 705,847 | 0.03% | 4q | -4.4%-$4.3M |
| VANGUARD FIDUCIARY TRUST CO | $92.8M | 699,213 | 0.02% | 2q | -6.8%-$6.7M |
| BARCLAYS PLC | $85.7M | 645,970 | 0.02% | 31q | -41.0%-$59.7M |
| RAYMOND JAMES FINANCIAL INC | $80.2M | 603,874 | 0.02% | 7q | -23.7%-$24.8M |
| Clearbridge Investments, LLC | $78.3M | 589,641 | 0.06% | 2q | +1.1%+$845.7K |
| CITIGROUP INC | $70.7M | 532,402 | 0.02% | 31q | -47.2%-$63.1M |
| OBERWEIS ASSET MANAGEMENT INC/ | $70.0M | 527,016 | 1.45% | 7q | HELD |
| MILLENNIUM MANAGEMENT LLC | $68.2M | 472,818 | 0.02% | 26q | +234.6%+$47.8M |
| Nuveen, LLC | $65.9M | 496,422 | 0.02% | 6q | -44.4%-$52.6M |
| LOOMIS SAYLES & CO L P | $62.5M | 470,934 | 0.08% | 5q | -28.6%-$25.1M |
| PRINCIPAL FINANCIAL GROUP INC | $57.1M | 429,951 | 0.03% | 31q | +15.1%+$7.5M |
| WELLINGTON MANAGEMENT GROUP LLP | $55.6M | 418,533 | 0.01% | 31q | -51.1%-$58.1M |
| Stephens Investment Management Group LLC | $54.3M | 409,436 | 0.58% | 12q | HELD |
| Nykredit A/S | $54.0M | 406,702 | 0.17% | new | FIRST |
| UBS Group AG | $51.5M | 373,590 | 0.01% | 31q | -60.9%-$80.4M |
| WESTFIELD CAPITAL MANAGEMENT CO LP | $51.2M | 385,811 | 0.17% | 10q | +2572.6%+$49.3M |
| IMC-Chicago, LLC | $48.8M | 7,129 | 0.01% | 14q | HELD |
| BNP PARIBAS FINANCIAL MARKETS | $47.9M | 220,814 | 0.02% | 31q | -16.5%-$9.5M |
| Maple Rock Capital Partners Inc. | $45.5M | 342,600 | 0.89% | new | NEW |
| AMERIPRISE FINANCIAL INC | $44.0M | 321,195 | 0.01% | 31q | -83.5%-$223.2M |
| CANADA PENSION PLAN INVESTMENT BOARD | $43.9M | 330,648 | 0.02% | 7q | +65.8%+$17.4M |
| Champlain Investment Partners, LLC | $39.7M | 299,368 | 1.02% | 2q | -16.2%-$7.7M |
| RHUMBLINE ADVISERS | $39.4M | 296,916 | 0.03% | 31q | -7.1%-$3.0M |
| Shannon River Fund Management LLC | $38.7M | 291,713 | 3.46% | 2q | -12.6%-$5.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $38.4M | 289,022 | 0.01% | 31q | +20.1%+$6.4M |
| Jupiter Topco LLC | $38.3M | 288,553 | 0.02% | new | FIRST |
| Caisse de depot et placement du Quebec | $37.5M | 282,580 | 0.05% | 5q | -37.0%-$22.0M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $36.1M | 271,982 | 0.05% | 3q | -16.8%-$7.3M |
| TimesSquare Capital Management, LLC | $35.5M | 267,705 | 0.52% | 2q | -14.3%-$5.9M |
| SEI INVESTMENTS CO | $34.8M | 261,830 | 0.03% | 31q | -23.0%-$10.4M |
| WESTWOOD HOLDINGS GROUP INC | $34.5M | 260,065 | 0.26% | 19q | -29.6%-$14.5M |
| FIRST TRUST ADVISORS LP | $34.3M | 258,308 | 0.02% | 25q | -15.9%-$6.5M |
| GILDER GAGNON HOWE & CO LLC | $34.2M | 257,434 | 0.35% | new | NEW |
| EMERALD ADVISERS, LLC | $33.5M | 252,693 | 0.79% | 14q | -48.8%-$31.9M |
| TWO SIGMA INVESTMENTS, LP | $32.4M | 222,921 | 0.02% | 15q | +188.0%+$21.1M |
| MACKENZIE FINANCIAL CORP | $32.1M | 242,194 | 0.03% | 16q | +351.1%+$25.0M |
| California Public Employees Retirement System | $30.5M | 230,004 | 0.02% | 14q | +1.2%+$362.8K |
| Swiss National Bank | $28.8M | 217,000 | 0.02% | 31q | +1.9%+$531.0K |
| Allianz Asset Management GmbH | $28.2M | 243,202 | 0.03% | 2q | +172.9%+$17.8M |
| VICTORY CAPITAL MANAGEMENT INC | $27.6M | 208,063 | 0.02% | 28q | +13.7%+$3.3M |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $26.6M | 200,116 | 0.08% | new | NEW |
| Tidal Investments LLC | $24.0M | 180,833 | 0.04% | 13q | +44.3%+$7.4M |
| Ranger Investment Management, L.P. | $23.5M | 176,692 | 1.48% | 3q | -21.2%-$6.3M |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $22.6M | options only | 0.40% | new | OPTIONS |
| ROYAL BANK OF CANADA | $22.5M | 169,479 | 0.00% | 31q | +473.7%+$18.6M |
| VAN ECK ASSOCIATES CORP | $22.3M | 167,993 | 0.01% | 11q | +15.7%+$3.0M |
| Russell Investments Group, Ltd. | $21.5M | 162,179 | 0.02% | 31q | +24.9%+$4.3M |
| TUDOR INVESTMENT CORP ET AL | $21.3M | 157,155 | 0.03% | new | NEW |
| SEGALL BRYANT & HAMILL, LLC | $21.3M | 160,293 | 0.25% | 7q | +1.8%+$377.4K |
| Mirae Asset Global Investments Co., Ltd. | $20.6M | 154,872 | 0.03% | 31q | -42.3%-$15.1M |
| Legal & General Group Plc | $20.4M | 153,857 | 0.00% | 31q | -3.1%-$642.4K |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $19.9M | 150,204 | 0.07% | 26q | +1052.9%+$18.2M |
| Driehaus Capital Management LLC | $19.2M | 144,875 | 0.11% | 3q | -16.7%-$3.9M |
| Retirement Systems of Alabama | $18.8M | 141,345 | 0.06% | 11q | +7.1%+$1.2M |
| EMERALD MUTUAL FUND ADVISERS TRUST | $18.5M | 139,275 | 0.65% | 14q | -54.7%-$22.3M |
| OSAIC HOLDINGS, INC. | $18.2M | 137,170 | 0.02% | 26q | -31.3%-$8.3M |
| HighTower Advisors, LLC | $17.6M | 132,484 | 0.02% | 19q | -27.0%-$6.5M |
| WCM INVESTMENT MANAGEMENT, LLC | $16.2M | 130,986 | 0.03% | 12q | -20.6%-$4.2M |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC | $16.1M | 121,491 | 0.16% | 31q | -8.4%-$1.5M |
| Creative Planning | $16.0M | 120,191 | 0.01% | 19q | +17.5%+$2.4M |
| ASSETMARK, INC | $15.9M | 119,875 | 0.03% | 12q | -18.8%-$3.7M |
| VANGUARD ASSET MANAGEMENT, Ltd | $13.7M | 103,541 | 0.01% | 2q | +6.5%+$843.2K |
| DF DENT & CO INC | $13.6M | 102,771 | 0.26% | 2q | +0.9%+$120.3K |
| NOMURA HOLDINGS INC | $13.4M | 101,062 | 0.02% | new | NEW |
| ALLIANCEBERNSTEIN L.P. | $13.3M | 155,136 | 0.00% | 31q | -41.9%-$9.6M |
| SCHWARTZ INVESTMENT COUNSEL INC | $13.3M | 100,000 | 0.44% | 6q | -76.2%-$42.5M |
| VOYA INVESTMENT MANAGEMENT LLC | $13.2M | 99,762 | 0.01% | 31q | -87.0%-$88.4M |
| NORDEA INVESTMENT MANAGEMENT AB | $13.1M | 104,479 | 0.01% | 6q | -3.3%-$449.2K |
| Rockefeller Capital Management L.P. | $12.7M | 96,045 | 0.02% | 4q | +0.6%+$78.7K |
| Y-Intercept (Hong Kong) Ltd | $12.6M | 94,680 | 0.25% | 3q | +156.6%+$7.7M |
| STATE OF WISCONSIN INVESTMENT BOARD | $12.5M | 94,192 | 0.03% | 19q | -1.2%-$156.1K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-07-29 | 13G/A | BlackRock, Inc. | 12.2% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 579 | $13.1B | 95,629,194 | 127 | 173 | 204 | 3.5% |
| Q1 2026 | 518 | $8.3B | 95,666,207 | 71 | 162 | 183 | 0.9% |
| Q4 2025 | 518 | $8.6B | 92,131,914 | 70 | 169 | 177 | 1.3% |
| Q3 2025 | 479 | $10.0B | 93,557,279 | 117 | 143 | 152 | 2.6% |
| Q2 2025 | 424 | $5.9B | 91,224,772 | 77 | 170 | 112 | 1.6% |
| Q1 2025 | 376 | $4.6B | 86,735,814 | 59 | 142 | 112 | 1.1% |
| Q4 2024 | 366 | $4.7B | 87,542,996 | 56 | 106 | 136 | 1.6% |
| Q3 2024 | 340 | $4.0B | 93,044,433 | 61 | 135 | 99 | 1.6% |
| Q2 2024 | 333 | $5.9B | 98,925,923 | 44 | 107 | 133 | 1.4% |
| Q1 2024 | 338 | $6.3B | 100,395,930 | 45 | 126 | 115 | 2.2% |
| Q4 2023 | 353 | $6.7B | 96,436,876 | 67 | 99 | 122 | 2.1% |
| Q3 2023 | 306 | $5.3B | 91,771,331 | 27 | 128 | 96 | 2.9% |
| Q2 2023 | 341 | $5.9B | 88,149,896 | 75 | 107 | 116 | 4.1% |
| Q1 2023 | 290 | $4.4B | 84,114,342 | 65 | 73 | 106 | 2.3% |
| Q4 2022 | 236 | $2.6B | 73,116,973 | 66 | 58 | 75 | 0.7% |
| Q3 2022 | 240 | $2.4B | 93,630,195 | 29 | 75 | 88 | 0.8% |
| Q2 2022 | 252 | $2.1B | 96,136,312 | 32 | 87 | 81 | 2.2% |
| Q1 2022 | 272 | $3.1B | 94,147,042 | 42 | 81 | 91 | 1.9% |
| Q4 2021 | 261 | $2.9B | 95,932,773 | 42 | 80 | 74 | 2.5% |
| Q3 2021 | 241 | $2.1B | 93,437,654 | 33 | 60 | 84 | 2.5% |
| Q2 2021 | 227 | $2.4B | 97,382,524 | 37 | 67 | 66 | 2.0% |
| Q1 2021 | 217 | $1.9B | 95,757,058 | 29 | 56 | 87 | 1.9% |
| Q4 2020 | 223 | $1.7B | 96,280,795 | 45 | 68 | 63 | 2.1% |
| Q3 2020 | 195 | $1.3B | 94,994,732 | 18 | 52 | 70 | 1.7% |
| Q2 2020 | 204 | $1.5B | 95,767,253 | 44 | 61 | 58 | 1.3% |
| Q1 2020 | 180 | $1.1B | 94,514,768 | 28 | 48 | 61 | 0.9% |
| Q4 2019 | 180 | $1.3B | 96,278,448 | 17 | 64 | 55 | 0.8% |
| Q3 2019 | 197 | $1.2B | 91,426,836 | 37 | 67 | 45 | 1.4% |
| Q2 2019 | 177 | $1.1B | 89,767,835 | 20 | 73 | 46 | 1.9% |
| Q1 2019 | 175 | $924.1M | 87,575,220 | 31 | 71 | 37 | 1.0% |
| Q4 2018 | 183 | $682.5M | 88,243,681 | 6 | 2 | 4 | 0.8% |