Who owns Rubrik (RBRK)
Which tracked institutional funds hold RBRK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RBRK company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on RBRK is one-sided between 2026-Q1 and 2026-Q2: 279 added or opened and 84 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
RBRK’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes RBRK more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in RBRK divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 544 tracked filers holding RBRK, 383 increased or opened the position and 213 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in RBRK between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 68
- Anatole Investment Management Ltd$176M
- WESTFIELD CAPITAL MANAGEMENT CO LP$75M
- Driehaus Capital Management LLC$40M
- TUDOR INVESTMENT CORP ET AL$28M
- TEACHER RETIREMENT SYSTEM OF TEXAS$19M
- OFI INVEST ASSET MANAGEMENT$15M
Full exits 59
- Penserra Capital Management LLC$75M
- SG Americas Securities, LLC$57M
- Greenvale Capital LLP$50M
- Qube Research & Technologies Ltd$36M
- CITADEL ADVISORS LLC$36M
- Capital World Investors$33M
Largest adds
- AQR CAPITAL MANAGEMENT LLC$675M
- BlackRock, Inc.$437M
- FMR LLC$336M
- VANGUARD PORTFOLIO MANAGEMENT LLC$273M
- FIRST TRUST ADVISORS LP$240M
- VANGUARD CAPITAL MANAGEMENT LLC$232M
Largest trims
- TWO SIGMA INVESTMENTS, LP$68M
- PointState Capital LP$30M
- Champlain Investment Partners, LLC$25M
- ALLIANCEBERNSTEIN L.P.$18M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$18M
- MARSHALL WACE, LLP$14M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| TUDOR INVESTMENT CORP ET AL added | 27,000,000 | $28M | 0.3% | 2026-Q2 |
| BlackRock, Inc. added | 9,990,174 | $802M | 8.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 9,947,988 | $780M | 8.2% | 2026-Q2 |
| FMR LLC added | 9,202,121 | $739M | 7.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 8,301,380 | $666M | 7.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 6,885,243 | $553M | 5.8% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 5,980,251 | $480M | 5.1% | 2026-Q2 |
| NORGES BANK added | 4,069,424 | $327M | 3.4% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 4,004,750 | $322M | 3.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,875,284 | $231M | 2.4% | 2026-Q2 |
| STATE STREET CORP added | 2,861,374 | $230M | 2.4% | 2026-Q2 |
| Legal & General Group Plc added | 2,620,318 | $210M | 2.2% | 2026-Q2 |
| Pictet Asset Management Holding SA trimmed | 2,368,281 | $190M | 2.0% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 2,253,594 | $173M | 1.8% | 2026-Q2 |
| Anatole Investment Management Ltd new | 2,189,257 | $176M | 1.9% | 2026-Q2 |
| PointState Capital LP trimmed | 1,856,244 | $149M | 1.6% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 1,739,658 | $140M | 1.5% | 2026-Q2 |
| Clearbridge Investments, LLC added | 1,577,133 | $127M | 1.3% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,542,643 | $124M | 1.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 1,500,810 | $120M | 1.3% | 2026-Q2 |
| INSTITUTIONAL VENTURE MANAGEMENT XV, LLC | 1,431,479 | $115M | 1.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 1,324,361 | $106M | 1.1% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,317,511 | $106M | 1.1% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 1,317,203 | $106M | 1.1% | 2026-Q2 |
| UBS Group AG trimmed | 1,254,839 | $101M | 1.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,168,219 | $94M | 1.0% | 2026-Q2 |
| BAMCO INC /NY/ added | 1,115,395 | $90M | 0.9% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 1,024,282 | $82M | 0.9% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 985,632 | $48M | 0.5% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP new | 937,308 | $75M | 0.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 922,048 | $74M | 0.8% | 2026-Q2 |
| IEQ CAPITAL, LLC added | 913,371 | $73M | 0.8% | 2026-Q2 |
| NORTHERN TRUST CORP added | 868,382 | $70M | 0.7% | 2026-Q2 |
| BARCLAYS PLC added | 786,511 | $63M | 0.7% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 772,052 | $62M | 0.7% | 2026-Q2 |
| Stephens Investment Management Group LLC added | 768,696 | $62M | 0.7% | 2026-Q2 |
| Capital International Investors added | 762,469 | $61M | 0.6% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 731,736 | $59M | 0.6% | 2026-Q2 |
| Fiera Capital Corp trimmed | 698,874 | $56M | 0.6% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 647,337 | $52M | 0.5% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 637,261 | $51M | 0.5% | 2026-Q2 |
| Bank of New York Mellon Corp added | 615,973 | $49M | 0.5% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 561,015 | $45M | 0.5% | 2026-Q2 |
| CONGRESS ASSET MANAGEMENT CO trimmed | 539,684 | $43M | 0.5% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 526,352 | $42M | 0.4% | 2026-Q2 |
| Holocene Advisors, LP trimmed | 525,000 | $42M | 0.4% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 509,189 | $41M | 0.4% | 2026-Q2 |
| Driehaus Capital Management LLC trimmed | 492,208 | $40M | 0.4% | 2026-Q2 |
| Champlain Investment Partners, LLC trimmed | 456,286 | $37M | 0.4% | 2026-Q2 |
| Abu Dhabi Investment Council Co P.J.S.C added | 445,341 | $36M | 0.4% | 2026-Q2 |
| Nuveen, LLC added | 420,184 | $34M | 0.4% | 2026-Q2 |
| Beacon Pointe Advisors, LLC trimmed | 391,778 | $31M | 0.3% | 2026-Q2 |
| BAILLIE GIFFORD & CO added | 388,021 | $31M | 0.3% | 2026-Q2 |
| BANK OF NOVA SCOTIA trimmed | 378,991 | $30M | 0.3% | 2026-Q2 |
| ARK Investment Management LLC trimmed | 365,426 | $29M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 352,685 | $28M | 0.3% | 2026-Q2 |
| CI INVESTMENTS INC. trimmed | 343,369 | $28M | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 331,242 | $27M | 0.3% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 324,824 | $26M | 0.3% | 2026-Q2 |
| Mariner, LLC added | 317,774 | $26M | 0.3% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 316,100 | $25M | 0.3% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 312,106 | $25M | 0.3% | 2026-Q2 |
| Swiss National Bank added | 306,800 | $25M | 0.3% | 2026-Q2 |
| FIL Ltd added | 292,523 | $23M | 0.2% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 282,198 | $23M | 0.2% | 2026-Q2 |
| Amova Asset Management Americas, Inc. trimmed | 281,233 | $23M | 0.2% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 280,448 | $23M | 0.2% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 274,607 | $22M | 0.2% | 2026-Q2 |
| Walleye Capital LLC added | 248,634 | $20M | 0.2% | 2026-Q2 |
| Freestone Grove Partners LP | 243,730 | $20M | 0.2% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 241,779 | $19M | 0.2% | 2026-Q2 |
| TEACHER RETIREMENT SYSTEM OF TEXAS trimmed | 237,720 | $19M | 0.2% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ trimmed | 230,497 | $19M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 222,267 | $18M | 0.2% | 2026-Q2 |
| EVENTIDE ASSET MANAGEMENT, LLC added | 216,431 | $17M | 0.2% | 2026-Q2 |
| ING GROEP NV trimmed | 204,565 | $16M | 0.2% | 2026-Q2 |
| Octahedron Capital Management L.P. added | 203,000 | $16M | 0.2% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 202,453 | $16M | 0.2% | 2026-Q2 |
| Cerity Partners LLC added | 193,861 | $16M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 190,839 | $15M | 0.2% | 2026-Q2 |
| CITIGROUP INC trimmed | 184,429 | $15M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 184,127 | $15M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 177,252 | $14M | 0.2% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 169,009 | $14M | 0.1% | 2026-Q2 |
| NATIXIS added | 163,674 | $13M | 0.1% | 2026-Q2 |
| PATHWAY CAPITAL MANAGEMENT, LP trimmed | 159,775 | $13M | 0.1% | 2026-Q2 |
| LOOMIS SAYLES & CO L P new | 153,937 | $12M | 0.1% | 2026-Q2 |
| OFI INVEST ASSET MANAGEMENT new | 152,453 | $11M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 148,096 | $12M | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 146,854 | $12M | 0.1% | 2026-Q2 |
| Corient Private Wealth LP added | 143,470 | $12M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 139,213 | $11M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 138,439 | $11M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 131,371 | $11M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 131,091 | $11M | 0.1% | 2026-Q2 |
| Jump Financial, LLC added | 129,437 | $10M | 0.1% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 126,180 | $10M | 0.1% | 2026-Q2 |
| Z3 Capital Partners, LLC added | 125,408 | $10M | 0.1% | 2026-Q2 |
| Invesco Ltd. added | 125,170 | $10M | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 124,461 | $10M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.