Who owns Accuray (ARAY)
Which tracked institutional funds hold ARAY, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ARAY 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 ARAY is one-sided between 2026-Q1 and 2026-Q2: 2 added or opened and 11 trimmed or exited — on balance reducing.
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
ARAY’s largest tracked holder by dollar value, TCW GROUP 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ARAY 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 105 tracked filers holding ARAY, 59 increased or opened the position and 74 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 ARAY 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 1
- JANE STREET GROUP, LLC$552K
Full exits 2
- MACKENZIE FINANCIAL CORP$911K
- HEARTLAND ADVISORS INC$767K
Largest adds
- AQR CAPITAL MANAGEMENT LLC$461K
Largest trims
- BlackRock, Inc.$2M
- ARMISTICE CAPITAL, LLC$709K
- WEBER CAPITAL MANAGEMENT LLC /ADV$690K
- NEUBERGER BERMAN GROUP LLC$685K
- STATE STREET CORP$658K
- GEODE CAPITAL MANAGEMENT, LLC$617K
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 |
|---|---|---|---|---|
| TCW GROUP INC added | 18,942,059 | $4M | 23.4% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 6,073,663 | $2M | 9.0% | 2026-Q2 |
| ARMISTICE CAPITAL, LLC added | 5,736,000 | $1M | 8.5% | 2026-Q2 |
| WEBER CAPITAL MANAGEMENT LLC /ADV trimmed | 4,932,706 | $1M | 7.3% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 4,437,800 | $1M | 6.6% | 2026-Q2 |
| BlackRock, Inc. trimmed | 3,266,185 | $842K | 4.8% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 2,719,032 | $701K | 4.0% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 2,139,720 | $552K | 3.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 2,065,284 | $532K | 3.1% | 2026-Q2 |
| DAFNA Capital Management LLC | 1,680,508 | $433K | 2.5% | 2026-Q2 |
| UBS Group AG added | 1,623,965 | $419K | 2.4% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 1,589,145 | $410K | 2.4% | 2026-Q2 |
| SILVERBACK ASSET MANAGEMENT LLC trimmed | 1,450,000 | $374K | 2.1% | 2026-Q2 |
| Squarepoint Ops LLC added | 1,448,234 | $373K | 2.1% | 2026-Q2 |
| FMR LLC added | 1,375,746 | $355K | 2.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 1,189,377 | $307K | 1.8% | 2026-Q2 |
| Kovack Advisors, Inc. added | 1,050,896 | $273K | 1.6% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 825,604 | $213K | 1.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 802,957 | $207K | 1.2% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 685,262 | $177K | 1.0% | 2026-Q2 |
| Silverberg Bernstein Capital Management LLC added | 658,915 | $170K | 1.0% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 649,353 | $167K | 1.0% | 2026-Q2 |
| STATE STREET CORP trimmed | 485,866 | $125K | 0.7% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 392,236 | $101K | 0.6% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 376,695 | $98K | 0.6% | 2026-Q2 |
| Qube Research & Technologies Ltd new | 347,512 | $90K | 0.5% | 2026-Q2 |
| IEQ CAPITAL, LLC added | 333,267 | $86K | 0.5% | 2026-Q2 |
| North Star Investment Management Corp. added | 264,620 | $68K | 0.4% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 263,559 | $68K | 0.4% | 2026-Q2 |
| MORGAN STANLEY trimmed | 257,033 | $66K | 0.4% | 2026-Q2 |
| Williams & Novak, LLC added | 238,230 | $61K | 0.4% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 204,014 | $53K | 0.3% | 2026-Q2 |
| BARCLAYS PLC trimmed | 172,639 | $45K | 0.3% | 2026-Q2 |
| XTX Topco Ltd added | 160,899 | $41K | 0.2% | 2026-Q2 |
| Mariner, LLC added | 127,442 | $33K | 0.2% | 2026-Q2 |
| Invesco Ltd. trimmed | 118,703 | $31K | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 111,500 | $29K | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC | 111,442 | $29K | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 110,614 | $28K | 0.2% | 2026-Q2 |
| Cerity Partners LLC added | 104,735 | $27K | 0.2% | 2026-Q2 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC added | 94,961 | $19K | 0.1% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC trimmed | 87,678 | $23K | 0.1% | 2026-Q2 |
| Tower Research Capital LLC (TRC) added | 54,570 | $14K | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 52,290 | $13K | 0.1% | 2026-Q2 |
| Point72 Asset Management, L.P. new | 47,552 | $12K | 0.1% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 43,916 | $11K | 0.1% | 2026-Q2 |
| GABELLI FUNDS LLC | 43,800 | $11K | 0.1% | 2026-Q2 |
| Creative Planning added | 42,686 | $11K | 0.1% | 2026-Q2 |
| Callan Family Office, LLC new | 42,386 | $11K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 41,222 | $11K | 0.1% | 2026-Q2 |
| CAPTRUST FINANCIAL ADVISORS new | 38,619 | $10K | 0.1% | 2026-Q2 |
| Arax Advisory Partners added | 36,561 | $9K | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 34,548 | $9K | 0.1% | 2026-Q2 |
| StoneX Group Inc. new | 33,096 | $12K | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 31,551 | $8K | 0.0% | 2026-Q2 |
| BRIGHTON JONES LLC new | 27,629 | $7K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 24,719 | $6K | 0.0% | 2026-Q2 |
| Pallas Capital Advisors LLC new | 24,613 | $6K | 0.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 23,400 | $6K | 0.0% | 2026-Q2 |
| HARBOUR INVESTMENTS, INC. trimmed | 23,329 | $6K | 0.0% | 2026-Q2 |
| Merit Financial Group, LLC new | 22,401 | $6K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 22,035 | $6K | 0.0% | 2026-Q2 |
| OPPENHEIMER & CO INC | 21,000 | $5K | 0.0% | 2026-Q2 |
| PERKINS CAPITAL MANAGEMENT INC trimmed | 20,000 | $5K | 0.0% | 2026-Q2 |
| R Squared Ltd trimmed | 19,354 | $5K | 0.0% | 2026-Q2 |
| Corient Private Wealth LP new | 18,489 | $5K | 0.0% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 18,291 | $5K | 0.0% | 2026-Q2 |
| Teton Advisors, LLC | 18,000 | $5K | 0.0% | 2026-Q2 |
| Focus Partners Wealth new | 15,870 | $4K | 0.0% | 2026-Q2 |
| Integrated Wealth Concepts LLC new | 15,038 | $4K | 0.0% | 2026-Q2 |
| NorthCrest Asset Manangement, LLC new | 14,265 | $4K | 0.0% | 2026-Q2 |
| Associated Banc-Corp | 13,675 | $4K | 0.0% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 13,300 | $3K | 0.0% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. new | 13,007 | $3K | 0.0% | 2026-Q2 |
| Krilogy Financial LLC new | 11,734 | $3K | 0.0% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 10,861 | $3K | 0.0% | 2026-Q2 |
| Algorithmic Investment Models, LLC new | 10,630 | $3K | 0.0% | 2026-Q2 |
| Proficio Capital Partners LLC new | 10,470 | $3K | 0.0% | 2026-Q2 |
| MML INVESTORS SERVICES, LLC | 10,000 | $3K | 0.0% | 2026-Q2 |
| SIMPLEX TRADING, LLC added | 9,329 | $2K | 0.0% | 2026-Q2 |
| Allworth Financial LP added | 7,769 | $2K | 0.0% | 2026-Q2 |
| Essential Partners LLC added | 7,369 | $2K | 0.0% | 2026-Q2 |
| Global Retirement Partners, LLC added | 5,255 | $1K | 0.0% | 2026-Q2 |
| EverSource Wealth Advisors, LLC added | 4,787 | $1K | 0.0% | 2026-Q2 |
| Optiver Holding B.V. added | 3,393 | $875 | 0.0% | 2026-Q2 |
| True Wealth Design, LLC added | 1,657 | $428 | 0.0% | 2026-Q2 |
| FIFTH THIRD BANCORP trimmed | 1,593 | $410 | 0.0% | 2026-Q2 |
| Crews Bank & Trust | 1,500 | $387 | 0.0% | 2026-Q2 |
| Farther Finance Advisors, LLC added | 1,490 | $385 | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. | 1,000 | $260 | 0.0% | 2026-Q2 |
| Larson Financial Group LLC | 920 | $237 | 0.0% | 2026-Q2 |
| Rockefeller Capital Management L.P. trimmed | 882 | $227 | 0.0% | 2026-Q2 |
| ROTHSCHILD INVESTMENT LLC added | 748 | $193 | 0.0% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 682 | $175 | 0.0% | 2026-Q2 |
| Fortitude Family Office, LLC new | 639 | $165 | 0.0% | 2026-Q2 |
| Fairscale Capital, LLC | 479 | $123 | 0.0% | 2026-Q2 |
| PNC Financial Services Group, Inc. | 143 | $37 | 0.0% | 2026-Q2 |
| SJS Investment Consulting Inc. added | 115 | $30 | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. trimmed | 104 | $27 | 0.0% | 2026-Q2 |
| HighMark Wealth Management LLC | 100 | $25 | 0.0% | 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.