DaveManuel.com · Institutional Ownership · Who Owns It
RAMBUS INC DEL (RMBS)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
630
Reporting holders
$13.8B
Reported value
92.8%
Of shares outstanding
2.2%
Calls
1.1%
Puts
+68
Holder change
Institutions report 100,610,601 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.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
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 |
| PRICE T ROWE ASSOCIATES INC /MD/ | $442.6M | 3,334,512 | 0.04% | 22q | -1.2%-$5.6M |
| 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 incl. $80.3M options CALL+PUT | 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 incl. $46.5M options CALL | 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 |
| EdgePoint Investment Group Inc. | $144.2M | 1,086,213 | 1.09% | 6q | -44.2%-$114.4M |
| JANE STREET GROUP, LLC | $143.0M incl. $130.4M options CALL+PUT | 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 |
| BESSEMER GROUP INC | $127.3M | 958,929 | 0.18% | 14q | -7.8%-$10.7M |
| NORTHERN TRUST CORP | $126.0M | 949,113 | 0.01% | 31q | -28.9%-$51.1M |
| CITADEL ADVISORS LLC | $116.5M incl. $63.4M options CALL+PUT | 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 incl. $5.4M options CALL+PUT | 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 |
| HRT FINANCIAL LP | $57.1M incl. $902.0K options OPT | 430,152 | 0.10% | new | NEW |
| 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 |
| UBS Group AG | $51.5M incl. $1.9M options CALL+PUT | 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 incl. $47.9M options CALL+PUT | 7,129 | 0.01% | 14q | HELD |
| BNP PARIBAS FINANCIAL MARKETS | $47.9M incl. $18.6M options CALL | 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 incl. $1.4M options CALL | 321,195 | 0.01% | 31q | -67.1%-$89.6M |
| CANADA PENSION PLAN INVESTMENT BOARD | $43.9M | 330,648 | 0.02% | 7q | +65.8%+$17.4M |
| Nykredit A/S | $42.5M | 320,040 | 0.16% | new | FIRST |
| 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 |
| Allianz Asset Management GmbH | $33.8M | 254,879 | 0.03% | 2q | +186.0%+$22.0M |
| EMERALD ADVISERS, LLC | $33.5M | 252,693 | 0.79% | 14q | -48.8%-$31.9M |
| TWO SIGMA INVESTMENTS, LP | $32.4M incl. $2.8M options CALL+PUT | 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 |
| 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 |
| Duquesne Family Office LLC | $23.0M | 173,000 | 0.44% | new | NEW |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $22.6M CALL | 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 incl. $451.3K options CALL | 157,155 | 0.03% | new | NEW |
| SEGALL BRYANT & HAMILL, LLC | $21.3M | 160,293 | 0.25% | 7q | +1.8%+$377.4K |
| LORD, ABBETT & CO. LLC | $21.0M | 158,260 | 0.06% | 6q | -59.1%-$30.4M |
| Mirae Asset Global Investments Co., Ltd. | $20.6M | 154,872 | 0.03% | 31q | +15.3%+$2.7M |
| Legal & General Group Plc | $20.4M | 153,857 | 0.00% | 31q | -3.1%-$642.4K |
| Handelsbanken Fonder AB | $20.0M | 150,857 | 0.06% | 25q | +28.1%+$4.4M |
| 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 |
| Thrivent Financial for Lutherans | $17.2M | 129,787 | 0.03% | 31q | -19.9%-$4.3M |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $16.6M | 125,421 | 0.02% | 31q | +1.0%+$162.7K |
| 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 |
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 |
|---|---|---|---|
| 2026-10-27 | 13G/A | BlackRock, Inc. | 10.4% |
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-09-04 | 2026-08-31 | Directors or officers departed or appointed | filing |
| 2026-08-05 | 2026-08-04 | Material agreement entered | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-26 | FAN XIANZHI SEAN | EVP, COO | Sold | 37,914 | $5.8M ×2 |
| 2026-06-02 | Higashi Emiko | Director | Sold | 10,000 | $1.6M ×2 |
| 2026-05-08 | Sayiner Necip | Director | Sold | 9,824 | $1.3M |
| 2026-06-03 | Sayiner Necip | Director | Sold | 5,000 | $850.8K |
| 2026-05-26 | Higashi Emiko | Director | Sold | 5,000 | $787.9K |
| 2026-06-01 | STANG ERIC B | Director | Sold | 5,000 | $730.0K |
| 2026-10-02 | KISSNER CHARLES | Director | Sold | 5,000 | $555.0K |
| 2026-09-22 | KISSNER CHARLES | Director | Sold | 5,000 | $525.0K |
| 2026-08-07 | KISSNER CHARLES | Director | Sold | 5,000 | $504.6K |
| 2026-05-22 | Shinn John | SVP, General Counsel | Sold | 1,000 | $143.6K |
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 |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 163 | $390.1M | 3,682,511 | 25 | 50 | 54 | 0.5% |
| Q2 2026 | 630 | $13.8B | 100,610,601 | 135 | 185 | 226 | 3.3% |
| Q1 2026 | 562 | $8.9B | 102,793,854 | 74 | 174 | 198 | 0.9% |
| Q4 2025 | 561 | $9.3B | 99,913,242 | 76 | 183 | 191 | 1.2% |
| Q3 2025 | 524 | $10.8B | 101,319,003 | 124 | 164 | 161 | 2.5% |
| Q2 2025 | 466 | $6.3B | 97,413,499 | 83 | 184 | 126 | 1.6% |
| Q1 2025 | 416 | $5.2B | 97,829,610 | 70 | 153 | 124 | 1.0% |
| Q4 2024 | 401 | $5.1B | 95,074,458 | 60 | 117 | 150 | 1.5% |
| Q3 2024 | 379 | $4.2B | 97,178,752 | 66 | 156 | 107 | 1.7% |
| Q2 2024 | 371 | $6.1B | 103,010,775 | 48 | 119 | 147 | 1.5% |
| Q1 2024 | 383 | $6.7B | 106,209,677 | 51 | 144 | 129 | 2.2% |
| Q4 2023 | 404 | $7.4B | 105,935,509 | 75 | 117 | 143 | 2.0% |
| Q3 2023 | 354 | $5.7B | 99,684,812 | 32 | 149 | 112 | 2.9% |
| Q2 2023 | 400 | $6.5B | 97,781,249 | 92 | 132 | 127 | 3.9% |
| Q1 2023 | 341 | $5.1B | 96,832,782 | 72 | 87 | 127 | 2.2% |
| Q4 2022 | 304 | $3.4B | 93,329,540 | 76 | 72 | 107 | 0.6% |
| Q3 2022 | 234 | $3.5B | 135,450,380 | 29 | 73 | 85 | 0.6% |
| Q2 2022 | 247 | $2.5B | 116,001,903 | 33 | 87 | 76 | 1.8% |
| Q1 2022 | 266 | $20.0B | 626,530,833 | 41 | 79 | 90 | 0.3% |
| Q4 2021 | 257 | $23.2B | 787,144,859 | 41 | 80 | 72 | 0.3% |
| Q3 2021 | 238 | $2.9B | 126,356,966 | 33 | 58 | 84 | 1.9% |
| Q2 2021 | 224 | $3.2B | 131,362,992 | 37 | 65 | 66 | 1.5% |
| Q1 2021 | 213 | $2.5B | 128,015,124 | 29 | 56 | 83 | 1.4% |
| Q4 2020 | 220 | $5.2B | 295,970,128 | 45 | 65 | 63 | 0.7% |
| Q3 2020 | 192 | $7.7B | 560,782,606 | 18 | 51 | 70 | 0.3% |
| Q2 2020 | 200 | $2.1B | 134,131,932 | 43 | 60 | 57 | 0.9% |
| Q1 2020 | 177 | $2.1B | 184,136,806 | 27 | 46 | 61 | 0.4% |
| Q4 2019 | 177 | $1.9B | 135,365,002 | 17 | 63 | 55 | 0.6% |
| Q3 2019 | 194 | $1.7B | 131,593,397 | 37 | 66 | 44 | 1.0% |
| Q2 2019 | 174 | $1.6B | 129,949,829 | 20 | 72 | 45 | 1.3% |
| Q1 2019 | 172 | $1.3B | 126,119,080 | 31 | 69 | 37 | 0.7% |
| Q4 2018 | 180 | $967.9M | 125,455,025 | 6 | 2 | 4 | 0.6% |