Who owns AROC (AROC)
Which tracked institutional funds hold AROC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AROC company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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 AROC is one-sided between 2025-Q4 and 2026-Q1: 176 added or opened and 47 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
AROC’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 AROC more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in AROC 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 2025-Q4 and 2026-Q1, across 429 tracked filers holding AROC, 235 increased or opened the position and 189 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 AROC between the 2025-Q4 and 2026-Q1 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 34
- VANGUARD PORTFOLIO MANAGEMENT LLC$381M
- VANGUARD CAPITAL MANAGEMENT LLC$261M
- VANGUARD FIDUCIARY TRUST CO$42M
- MARSHALL WACE, LLP$23M
- South Street Advisors LLC$13M
- AXIOM INVESTORS LLC /DE$10M
Full exits 16
- VANGUARD GROUP INC$503M
- Balyasny Asset Management L.P.$26M
- Pacer Advisors, Inc.$14M
- Point72 Asset Management, L.P.$7M
- TWO SIGMA ADVISERS, LP$5M
- ExodusPoint Capital Management, LP$3M
Largest adds
- BlackRock, Inc.$140M
- EARNEST PARTNERS LLC$79M
- STATE STREET CORP$69M
- AMERICAN CENTURY COMPANIES INC$62M
- BANK OF AMERICA CORP /DE/$52M
- NEUBERGER BERMAN GROUP LLC$50M
Largest trims
- MILLENNIUM MANAGEMENT LLC$25M
- NORGES BANK$11M
- Nuveen, LLC$9M
- CITADEL ADVISORS LLC$8M
- Qube Research & Technologies Ltd$8M
- BARCLAYS PLC$7M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 24,500,823 | $853M | 13.9% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 10,937,847 | $381M | 6.2% | 2026-Q1 |
| EARNEST PARTNERS LLC trimmed | 9,766,279 | $340M | 5.5% | 2026-Q1 |
| Invesco Ltd. trimmed | 7,831,009 | $273M | 4.4% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 7,497,298 | $261M | 4.3% | 2026-Q1 |
| STATE STREET CORP added | 7,235,344 | $252M | 4.1% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 6,678,879 | $232M | 3.8% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 5,922,116 | $206M | 3.4% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 5,524,830 | $192M | 3.1% | 2026-Q1 |
| SEI INVESTMENTS CO trimmed | 4,433,355 | $154M | 2.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 4,159,006 | $145M | 2.4% | 2026-Q1 |
| FMR LLC trimmed | 4,090,773 | $142M | 2.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 3,198,711 | $111M | 1.8% | 2026-Q1 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. added | 2,502,235 | $87M | 1.4% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 2,399,647 | $84M | 1.4% | 2026-Q1 |
| MORGAN STANLEY trimmed | 2,186,565 | $76M | 1.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 2,169,536 | $75M | 1.2% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 2,065,388 | $72M | 1.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 2,054,170 | $71M | 1.2% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,913,014 | $67M | 1.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 1,912,918 | $67M | 1.1% | 2026-Q1 |
| NATIXIS ADVISORS, LLC added | 1,796,291 | $63M | 1.0% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,585,729 | $55M | 0.9% | 2026-Q1 |
| Energy Income Partners, LLC trimmed | 1,393,885 | $49M | 0.8% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,376,651 | $48M | 0.8% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP added | 1,271,178 | $45M | 0.7% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 1,289,586 | $45M | 0.7% | 2026-Q1 |
| Clearbridge Investments, LLC added | 1,264,059 | $44M | 0.7% | 2026-Q1 |
| Stephens Investment Management Group LLC trimmed | 1,259,925 | $44M | 0.7% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 1,233,251 | $43M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 1,211,494 | $42M | 0.7% | 2026-Q1 |
| Boston Partners trimmed | 1,125,333 | $39M | 0.6% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 1,090,618 | $38M | 0.6% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 1,021,709 | $36M | 0.6% | 2026-Q1 |
| KAYNE ANDERSON CAPITAL ADVISORS LP added | 996,468 | $35M | 0.6% | 2026-Q1 |
| Nuveen, LLC trimmed | 966,118 | $34M | 0.5% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 857,373 | $30M | 0.5% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 830,124 | $29M | 0.5% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 803,608 | $28M | 0.5% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 730,069 | $25M | 0.4% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 679,229 | $24M | 0.4% | 2026-Q1 |
| MARSHALL WACE, LLP added | 670,195 | $23M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board added | 627,406 | $22M | 0.4% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 591,534 | $21M | 0.3% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 582,273 | $20M | 0.3% | 2026-Q1 |
| Focus Partners Wealth added | 578,547 | $20M | 0.3% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 557,497 | $19M | 0.3% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 544,474 | $19M | 0.3% | 2026-Q1 |
| UBS Group AG added | 528,978 | $18M | 0.3% | 2026-Q1 |
| BARCLAYS PLC trimmed | 499,015 | $17M | 0.3% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 497,920 | $17M | 0.3% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 494,649 | $17M | 0.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 493,387 | $17M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 485,773 | $17M | 0.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 460,030 | $16M | 0.3% | 2026-Q1 |
| Legal & General Group Plc trimmed | 430,230 | $15M | 0.2% | 2026-Q1 |
| EXCHANGE TRADED CONCEPTS, LLC added | 424,020 | $15M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 415,993 | $14M | 0.2% | 2026-Q1 |
| Trexquant Investment LP trimmed | 412,235 | $14M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 399,449 | $14M | 0.2% | 2026-Q1 |
| South Street Advisors LLC new | 373,825 | $13M | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 364,412 | $13M | 0.2% | 2026-Q1 |
| Swiss National Bank | 329,300 | $11M | 0.2% | 2026-Q1 |
| ROYCE & ASSOCIATES LP added | 308,920 | $11M | 0.2% | 2026-Q1 |
| AXIOM INVESTORS LLC /DE new | 295,025 | $10M | 0.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 292,685 | $10M | 0.2% | 2026-Q1 |
| HAWK RIDGE CAPITAL MANAGEMENT LP new | 276,944 | $10M | 0.2% | 2026-Q1 |
| Waverly Advisors, LLC trimmed | 261,141 | $9M | 0.1% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 254,792 | $9M | 0.1% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 253,095 | $9M | 0.1% | 2026-Q1 |
| Allianz Asset Management GmbH added | 251,433 | $9M | 0.1% | 2026-Q1 |
| Bernzott Capital Advisors trimmed | 249,515 | $9M | 0.1% | 2026-Q1 |
| VIKING FUND MANAGEMENT LLC | 220,000 | $8M | 0.1% | 2026-Q1 |
| NORGES BANK trimmed | 283,181 | $7M | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 203,606 | $7M | 0.1% | 2026-Q1 |
| Ellsworth Advisors, LLC added | 202,942 | $7M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 202,634 | $7M | 0.1% | 2026-Q1 |
| CROWN ADVISORS MANAGEMENT, INC. | 200,000 | $7M | 0.1% | 2026-Q1 |
| KING LUTHER CAPITAL MANAGEMENT CORP added | 198,812 | $7M | 0.1% | 2026-Q1 |
| Man Group plc trimmed | 195,202 | $7M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 190,006 | $7M | 0.1% | 2026-Q1 |
| Federation des caisses Desjardins du Quebec added | 183,563 | $6M | 0.1% | 2026-Q1 |
| BARD ASSOCIATES INC | 182,391 | $6M | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 178,840 | $6M | 0.1% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 166,244 | $6M | 0.1% | 2026-Q1 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 163,672 | $6M | 0.1% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 158,680 | $6M | 0.1% | 2026-Q1 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. new | 153,665 | $5M | 0.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 151,675 | $5M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 19,324,394 | $503M | 8.2% | 2025-Q4 stale |
| Balyasny Asset Management L.P. trimmed | 980,165 | $26M | 0.4% | 2025-Q4 stale |
| Driehaus Capital Management LLC trimmed | 800,057 | $20M | 0.3% | 2025-Q2 stale |
| HITE Hedge Asset Management LLC added | 745,087 | $20M | 0.3% | 2025-Q3 stale |
| CHURCHILL MANAGEMENT Corp added | 475,581 | $12M | 0.2% | 2025-Q2 stale |
| Integrated Investment Consultants, LLC added | 427,281 | $11M | 0.2% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC trimmed | 291,446 | $8M | 0.1% | 2025-Q3 stale |
| Point72 Asset Management, L.P. trimmed | 284,762 | $7M | 0.1% | 2025-Q4 stale |
| Capitolis Liquid Global Markets LLC new | 267,100 | $7M | 0.1% | 2025-Q3 stale |
| HWG Holdings LP trimmed | 239,779 | $6M | 0.1% | 2025-Q2 stale |
| NBW CAPITAL LLC trimmed | 209,698 | $5M | 0.1% | 2025-Q2 stale |
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.