RBRK · Rubrik, Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding RBRK
All superinvestors →Holder Concentration
Across 586 13F filersWho Holds RBRK
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 576 filers, like-for-like change +8.9%; actively managed books +7.8%; index-like books +14.0%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 48.9% | 321 | +13.1% |
| Exempt adviser | 1.4% | 9 | -35.2% |
| Adviser | 2.5% | 16 | -13.9% |
| Bank | 9.7% | 28 | -1.9% |
| Insurer | 0.0% | 3 | -20.5% |
| Broker-dealer | 0.1% | 1 | -48.0% |
| Benefit plan | 0.6% | 7 | +24.2% |
| Non-US | 6.4% | 16 | +30.2% |
| Holding company | 17.9% | 8 | +12.5% |
| Unknown | 12.5% | 167 | +7.3% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 30.6% | 46 | +14.0% |
| Systematic-like | 1.8% | 23 | -63.7% |
| Concentrated | 3.8% | 117 | +61.4% |
| Diversified active | 62.5% | 386 | +12.1% |
| Unknown | 1.3% | 4 | -22.4% |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 46.4% | 338 | +18.2% |
| Medium turnover | 30.0% | 127 | +15.1% |
| High turnover | 6.9% | 61 | -34.4% |
| Unknown | 16.7% | 50 | +3.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 17.4% | 72 | +1.3% |
| Medium horizon | 13.3% | 120 | -4.6% |
| Long horizon | 66.3% | 352 | +18.6% |
| Unknown | 3.0% | 32 | -34.0% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 4.6% | 166 | +11.2% |
| $1B to $10B | 4.9% | 185 | -27.0% |
| $10B to $100B | 14.9% | 151 | +6.9% |
| $100B or more | 75.6% | 74 | +13.0% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 3.5% | 210 | +64.3% |
| Pooled investment vehicles | 4.4% | 35 | -55.9% |
| Registered funds and BDCs | 24.2% | 31 | +8.4% |
| Pension and profit sharing plans | 0.1% | 4 | +465.2% |
| Insurance companies | 3.1% | 3 | +6.8% |
| Charitable organizations | 0.0% | 1 | -0.7% |
| Governments and sovereign funds | 0.3% | 4 | -43.0% |
| Corporations | 0.1% | 1 | -74.4% |
| Other investment advisers | 0.1% | 7 | +24.4% |
| Other | 0.1% | 4 | +1516.1% |
| Diversified | 13.1% | 21 | +164.5% |
| Unknown | 51.1% | 255 | +5.0% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 18.5% | 59 | +30.7% |
| Private equity funds | 2.1% | 20 | -38.0% |
| Venture capital funds | 1.3% | 6 | -16.2% |
| Real estate funds | 0.1% | 6 | +558.1% |
| Liquidity funds | 0.0% | 1 | -9.6% |
| Securitized asset funds | 1.3% | 1 | +103.6% |
| Other private funds | 2.6% | 28 | -7.4% |
| Mixed private funds | 0.8% | 7 | +17.4% |
| Private funds, type not stated | 0.1% | 7 | -87.6% |
| No private funds | 23.4% | 195 | +11.1% |
| Unknown | 49.7% | 246 | +7.0% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 82.3% | 485 | +9.6% |
| Outside the US | 17.7% | 91 | +5.4% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 7 holders with no observed 2026-03-31 13F and 6 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
576 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $10,193,960 (2 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 83.0% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies RBRK's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not RBRK, quarter ended Jun 30, 2026Found through its holder-overlap peers: DDOG, SNOW, KRMN, FIG, NET, ZS, S, MDB, OKTA, NAVN, CRDO, IOT, KLAR, ILMN, NTNX, RMBS, DKNG, CRWD, CRCL, FTNT. 3,219 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Capital World Investors Adviser, Diversified active | $10,194,911,803 9 held | NET, ILMN, DKNG |
| 2 | JENNISON ASSOCIATES LLC Registered adviser, Diversified active | $8,440,728,970 10 held | CRWD, DDOG, SNOW |
| 3 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser, Diversified active | $2,880,053,291 11 held | SNOW, MDB, OKTA |
| 4 | Swedbank AB Unknown, Diversified active | $2,766,583,803 15 held | FTNT, SNOW, OKTA |
| 5 | CITADEL ADVISORS LLC Registered adviser, Systematic-like | $2,672,248,050 18 held | SNOW, DDOG, FTNT |
| 6 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser, Diversified active | $2,656,969,733 12 held | FTNT, DDOG, CRDO |
| 7 | DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main Unknown, Diversified active | $2,378,380,647 12 held | NET, MDB, SNOW |
| 8 | T. Rowe Price Investment Management, Inc. Adviser, Diversified active | $2,298,363,637 7 held | DDOG, SNOW, NET |
| 9 | SC US (TTGP), LTD. Unknown, Concentrated | $1,598,212,802 3 held | KLAR, FIG, MDB |
| 10 | CIBC Bancorp USA Inc. Unknown, Diversified active | $1,566,655,799 15 held | DKNG, DDOG, NET |
Fund Ownership of RBRK by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 15.03% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 1.59% | 3,286,929 |
| Index ETFs | 13.44% | 27,871,147 |
| Active ETFs | 0.39% | 802,212 |
| Active funds | 9.55% | 19,792,820 |
| Unclassified | 0.04% | 90,905 |
| All registered funds | 25.01% | 51,844,013 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $802,011,159 | 7.24% | 9,990,174 | Shares | 2026-08-07 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $798,624,474 | 7.21% | 9,947,988 | Shares | 2026-08-14 | |
| Mega FMR LLC Holding company | $738,746,272 | 6.67% | 9,202,121 | Shares | 2026-08-13 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $666,434,786 | 6.01% | 8,301,380 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $552,747,308 | 4.99% | 6,885,243 | Shares | 2026-08-13 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $480,094,550 | 4.33% | 5,980,251 | Shares | 2026-08-11 | |
| Mega NORGES BANK Non-US | $326,693,358 | 2.95% | 4,069,424 | Shares | 2026-08-12 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $321,501,328 | 2.90% | 4,004,750 | Shares | 2026-08-12 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $230,827,798 | 2.08% | 2,875,284 | Shares | 2026-08-12 | |
| Mega STATE STREET CORP Bank | $229,711,104 | 2.07% | 2,861,374 | Shares | 2026-09-22 | |
| Mega Legal & General Group Plc | $210,359,128 | 1.90% | 2,620,318 | Shares | 2026-08-14 | |
| Mega Pictet Asset Management Holding SA | $190,125,598 | 1.72% | 2,368,281 | Shares | 2026-07-30 | |
| Mega JPMORGAN CHASE & CO Bank | $180,918,522 | 1.63% | 2,253,594 | Shares | 2026-08-12 | |
| Small Anatole Investment Management Ltd | $175,753,551 | 1.59% | 2,189,257 | Shares | 2026-08-14 | |
| Mid PointState Capital LP Registered adviser | $149,019,268 | 1.34% | 1,856,244 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $146,655,504 | 1.32% | 1,826,800 | Call | 2026-08-14 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $139,659,741 | 1.26% | 1,739,658 | Shares | 2026-08-13 | |
| Mega Clearbridge Investments, LLC Registered adviser | $126,612,237 | 1.14% | 1,577,133 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY Holding company | $123,843,376 | 1.12% | 1,542,643 | Shares | 2026-08-13 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $120,485,026 | 1.09% | 1,500,810 | Shares | 2026-08-13 | |
| Small INSTITUTIONAL VENTURE MANAGEMENT XV, LLC Exempt adviser | $114,919,134 | 1.04% | 1,431,479 | Shares | 2026-08-14 | |
| Large Penserra Capital Management LLC Registered adviser | $110,755,411 | 1.00% | 1,379,614 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $106,319,698 | 0.96% | 1,324,361 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $105,769,782 | 0.95% | 1,317,511 | Shares | 2026-08-14 | |
| Large FEDERATED HERMES, INC. Adviser | $105,745,056 | 0.95% | 1,317,203 | Shares | 2026-08-12 | |
| Mega UBS Group AG Bank | $100,738,473 | 0.91% | 1,254,839 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $96,344,028 | 0.87% | 1,200,100 | Call | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $94,272,804 | 0.85% | 1,174,300 | Put | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $93,784,620 | 0.85% | 1,168,219 | Shares | 2026-08-14 | |
| Large BAMCO INC /NY/ Registered adviser | $89,543,910 | 0.81% | 1,115,395 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $82,229,358 | 0.74% | 1,024,282 | Shares | 2026-08-13 | |
| Large CONGRESS ASSET MANAGEMENT CO Registered adviser | $81,909,008 | 0.74% | 715,550 | Shares | 2026-10-06 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $79,126,536 | 0.71% | 985,632 | Shares | 2026-08-14 | |
| Large WESTFIELD CAPITAL MANAGEMENT CO LP Registered adviser | $75,247,086 | 0.68% | 937,308 | Shares | 2026-08-12 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $74,022,012 | 0.67% | 922,048 | Shares | 2026-08-14 | |
| Large IEQ CAPITAL, LLC Registered adviser | $73,325,422 | 0.66% | 913,371 | Shares | 2026-08-11 | |
| Mega NORTHERN TRUST CORP Bank | $69,713,704 | 0.63% | 868,382 | Shares | 2026-08-13 | |
| Mega BARCLAYS PLC Bank | $63,141,101 | 0.57% | 786,511 | Shares | 2026-08-14 | |
| Mega Amundi Holding company | $62,228,879 | 0.56% | 775,148 | Shares | 2026-08-11 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $61,980,334 | 0.56% | 772,052 | Shares | 2026-08-14 | |
| Mid Stephens Investment Management Group LLC Registered adviser | $61,710,914 | 0.56% | 768,696 | Shares | 2026-07-29 | |
| Mega Capital International Investors Adviser | $61,211,011 | 0.55% | 762,469 | Shares | 2026-08-12 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $58,743,764 | 0.53% | 731,736 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $56,725,848 | 0.51% | 706,600 | Call | 2026-09-02 | |
| Large Fiera Capital Corp Non-US | $56,105,604 | 0.51% | 698,874 | Shares | 2026-08-07 | |
| Large Squarepoint Ops LLC Registered adviser | $51,968,214 | 0.47% | 647,337 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $51,159,310 | 0.46% | 637,261 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $49,450,307 | 0.45% | 615,973 | Shares | 2026-08-06 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $45,038,284 | 0.41% | 561,015 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $43,038,108 | 0.39% | 536,100 | Put | 2026-08-14 | |
| Mega ROYAL BANK OF CANADA Bank | $42,255,535 | 0.38% | 526,352 | Shares | 2026-08-14 | |
| Large Holocene Advisors, LP Registered adviser | $42,147,000 | 0.38% | 525,000 | Shares | 2026-08-14 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $40,877,692 | 0.37% | 509,189 | Shares | 2026-08-13 | |
| Large Driehaus Capital Management LLC Registered adviser | $39,514,458 | 0.36% | 492,208 | Shares | 2026-08-14 | |
| Mid Champlain Investment Partners, LLC Registered adviser | $36,630,640 | 0.33% | 456,286 | Shares | 2026-08-12 | |
| Small Abu Dhabi Investment Council Co P.J.S.C | $35,751,975 | 0.32% | 445,341 | Shares | 2026-08-13 | |
| Mega SG Americas Securities, LLC | $35,557,457 | 0.32% | 442,918 | Shares | 2026-08-07 | |
| Mega Nuveen, LLC | $33,732,370 | 0.30% | 420,184 | Shares | 2026-08-11 | |
| Large Beacon Pointe Advisors, LLC Registered adviser | $31,451,937 | 0.28% | 391,778 | Shares | 2026-08-18 | |
| Mega BAILLIE GIFFORD & CO Adviser | $31,150,324 | 0.28% | 388,021 | Shares | 2026-08-06 | |
| Large BANK OF NOVA SCOTIA Bank | $30,425,397 | 0.27% | 378,991 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $30,418,092 | 0.27% | 378,900 | Put | 2026-09-02 | |
| Large ARK Investment Management LLC Registered adviser | $29,336,399 | 0.26% | 365,426 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Non-US | $28,313,547 | 0.26% | 352,685 | Shares | 2026-08-07 | |
| Large CI INVESTMENTS INC. Non-US | $27,565,663 | 0.25% | 343,369 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $26,592,107 | 0.24% | 331,242 | Shares | 2026-08-14 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $26,076,870 | 0.24% | 324,824 | Shares | 2026-07-29 | |
| Large Mariner, LLC Registered adviser | $25,510,896 | 0.23% | 317,774 | Shares | 2026-08-13 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD Non-US | $25,376,508 | 0.23% | 316,100 | Shares | 2026-08-14 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. Non-US | $25,055,868 | 0.23% | 312,106 | Shares | 2026-08-13 | |
| Mega Swiss National Bank | $24,629,904 | 0.22% | 306,800 | Shares | 2026-08-11 | |
| Mega FIL Ltd Non-US | $23,483,746 | 0.21% | 292,523 | Shares | 2026-08-13 | |
| Mega Sumitomo Mitsui Trust Group, Inc. Bank | $22,654,855 | 0.20% | 282,198 | Shares | 2026-07-30 | |
| Mid Amova Asset Management Americas, Inc. Registered adviser | $22,577,385 | 0.20% | 281,233 | Shares | 2026-08-13 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $22,045,449 | 0.20% | 274,607 | Shares | 2026-08-13 | |
| Large Walleye Capital LLC Registered adviser | $19,960,337 | 0.18% | 248,634 | Shares | 2026-08-03 | |
| Large Freestone Grove Partners LP Registered adviser | $19,566,644 | 0.18% | 243,730 | Shares | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Adviser | $19,410,018 | 0.18% | 241,779 | Shares | 2026-08-14 | |
| Large TEACHER RETIREMENT SYSTEM OF TEXAS Benefit plan | $19,084,161 | 0.17% | 237,720 | Shares | 2026-08-14 | |
| Mega BANK OF MONTREAL /CAN/ Bank | $18,504,298 | 0.17% | 230,497 | Shares | 2026-08-12 | |
| Mega D. E. Shaw & Co., Inc. | $18,151,308 | 0.16% | 226,100 | Call | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $17,843,592 | 0.16% | 222,267 | Shares | 2026-08-14 | |
| Mid EVENTIDE ASSET MANAGEMENT, LLC Registered adviser | $17,375,080 | 0.16% | 216,431 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $17,051,472 | 0.15% | 212,400 | Call | 2026-08-14 | |
| Large ING GROEP NV Bank | $16,422,478 | 0.15% | 204,565 | Shares | 2026-08-13 | |
| Small Octahedron Capital Management L.P. | $16,296,840 | 0.15% | 203,000 | Shares | 2026-08-14 | |
| Mega STIFEL FINANCIAL CORP | $16,252,926 | 0.15% | 202,453 | Shares | 2026-08-12 | |
| Mega D. E. Shaw & Co., Inc. | $16,240,644 | 0.15% | 202,300 | Put | 2026-08-14 | |
| Large Cerity Partners LLC Registered adviser | $15,563,159 | 0.14% | 193,861 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $15,320,554 | 0.14% | 190,839 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $14,805,959 | 0.13% | 184,429 | Shares | 2026-08-03 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $14,781,715 | 0.13% | 184,127 | Shares | 2026-08-24 | |
| Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $14,699,779 | 0.13% | 128,416 | Shares | 2026-10-13 | |
| Mega California Public Employees Retirement System | $14,229,790 | 0.13% | 177,252 | Shares | 2026-08-14 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $13,568,042 | 0.12% | 169,009 | Shares | 2026-08-14 | |
| Large NATIXIS Non-US | $13,139,748 | 0.12% | 163,674 | Shares | 2026-08-13 | |
| Large HRT FINANCIAL LP | $12,835,005 | 0.12% | 159,878 | Shares | 2026-08-14 | |
| Micro PATHWAY CAPITAL MANAGEMENT, LP | $12,826,737 | 0.12% | 159,775 | Shares | 2026-08-03 | |
| Large HighTower Advisors, LLC Registered adviser | $12,677,255 | 0.11% | 157,913 | Shares | 2026-08-05 | |
| Large Walleye Trading LLC | $12,636,072 | 0.11% | 157,400 | Call | 2026-08-03 |
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