Who owns ACIW (ACIW)
Which tracked institutional funds hold ACIW, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACIW 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
50 tracked funds added or opened ACIW while 147 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
ACIW’s largest tracked holder by dollar value, VANGUARD 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 gap the other way — the median holder sizes ACIW more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ACIW 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 378 tracked filers holding ACIW, 202 increased or opened the position and 202 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 ACIW 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 12
- VANGUARD PORTFOLIO MANAGEMENT LLC$330M
- VANGUARD CAPITAL MANAGEMENT LLC$186M
- VANGUARD FIDUCIARY TRUST CO$29M
- VANGUARD ASSET MANAGEMENT, Ltd$4M
- Emerald Investment Advisers, LLC$3M
- Vanguard Global Advisers, LLC$2M
Full exits 28
- VANGUARD GROUP INC$634M
- OBERWEIS ASSET MANAGEMENT INC/$16M
- TWO SIGMA ADVISERS, LP$11M
- Edgestream Partners, L.P.$6M
- WINTON GROUP Ltd$6M
- HRT FINANCIAL LP$5M
Largest adds
- REINHART PARTNERS, LLC.$38M
- FMR LLC$34M
- NORGES BANK$29M
- RENAISSANCE TECHNOLOGIES LLC$14M
- CONGRESS ASSET MANAGEMENT CO$9M
- Global Alpha Capital Management Ltd.$6M
Largest trims
- BlackRock, Inc.$201M
- Hood River Capital Management LLC$47M
- AMERICAN CENTURY COMPANIES INC$39M
- AMERIPRISE FINANCIAL INC$36M
- STATE STREET CORP$27M
- MORGAN STANLEY$26M
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 | 15,117,277 | $620M | 13.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 8,056,347 | $330M | 7.0% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 6,616,371 | $271M | 5.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 4,540,512 | $186M | 3.9% | 2026-Q1 |
| STATE STREET CORP added | 4,150,909 | $170M | 3.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,174,725 | $130M | 2.8% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,813,150 | $115M | 2.4% | 2026-Q1 |
| Hood River Capital Management LLC trimmed | 2,391,319 | $98M | 2.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 2,028,833 | $97M | 2.1% | 2026-Q1 |
| REINHART PARTNERS, LLC. added | 2,234,814 | $92M | 1.9% | 2026-Q1 |
| North Reef Capital Management LP added | 2,230,000 | $91M | 1.9% | 2026-Q1 |
| FMR LLC added | 2,164,347 | $89M | 1.9% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 2,149,809 | $88M | 1.9% | 2026-Q1 |
| NORGES BANK added | 1,528,101 | $84M | 1.8% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,913,053 | $78M | 1.7% | 2026-Q1 |
| CONGRESS ASSET MANAGEMENT CO added | 1,833,808 | $75M | 1.6% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 1,769,112 | $73M | 1.5% | 2026-Q1 |
| LONDON CO OF VIRGINIA added | 1,680,581 | $69M | 1.5% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,324,419 | $54M | 1.1% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,248,549 | $51M | 1.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,094,365 | $45M | 1.0% | 2026-Q1 |
| RICE HALL JAMES & ASSOCIATES, LLC added | 1,003,356 | $41M | 0.9% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 999,617 | $41M | 0.9% | 2026-Q1 |
| Global Alpha Capital Management Ltd. added | 915,665 | $38M | 0.8% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 870,070 | $36M | 0.8% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 755,965 | $31M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 718,224 | $29M | 0.6% | 2026-Q1 |
| PALISADE CAPITAL MANAGEMENT, LP trimmed | 708,427 | $29M | 0.6% | 2026-Q1 |
| Nuveen, LLC trimmed | 700,182 | $29M | 0.6% | 2026-Q1 |
| Aristotle Capital Boston, LLC trimmed | 660,819 | $27M | 0.6% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 628,457 | $26M | 0.5% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 611,253 | $25M | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 605,157 | $25M | 0.5% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 597,765 | $25M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 594,285 | $24M | 0.5% | 2026-Q1 |
| NORTH STAR ASSET MANAGEMENT INC trimmed | 588,944 | $24M | 0.5% | 2026-Q1 |
| MetLife Investment Management, LLC added | 523,795 | $21M | 0.5% | 2026-Q1 |
| WCM INVESTMENT MANAGEMENT, LLC added | 516,342 | $21M | 0.4% | 2026-Q1 |
| SEI INVESTMENTS CO added | 503,189 | $21M | 0.4% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 504,864 | $21M | 0.4% | 2026-Q1 |
| Swedbank AB trimmed | 464,112 | $19M | 0.4% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 457,160 | $19M | 0.4% | 2026-Q1 |
| UBS Group AG added | 446,444 | $18M | 0.4% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 441,477 | $18M | 0.4% | 2026-Q1 |
| Invesco Ltd. trimmed | 431,191 | $18M | 0.4% | 2026-Q1 |
| Assenagon Asset Management S.A. trimmed | 406,227 | $17M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board trimmed | 397,468 | $16M | 0.3% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO trimmed | 389,111 | $16M | 0.3% | 2026-Q1 |
| WEITZ INVESTMENT MANAGEMENT, INC. | 367,700 | $15M | 0.3% | 2026-Q1 |
| VALUE HOLDINGS MANAGEMENT CO. LLC added | 360,900 | $15M | 0.3% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 355,735 | $15M | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 350,333 | $14M | 0.3% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 328,864 | $13M | 0.3% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 323,473 | $13M | 0.3% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 303,085 | $12M | 0.3% | 2026-Q1 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 292,594 | $12M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 295,356 | $12M | 0.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 292,199 | $12M | 0.3% | 2026-Q1 |
| River Road Asset Management, LLC trimmed | 267,210 | $11M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 258,697 | $11M | 0.2% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 255,275 | $10M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 246,459 | $10M | 0.2% | 2026-Q1 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC added | 246,283 | $10M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 243,209 | $10M | 0.2% | 2026-Q1 |
| NORDEA INVESTMENT MANAGEMENT AB trimmed | 215,338 | $9M | 0.2% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 205,320 | $8M | 0.2% | 2026-Q1 |
| Swiss National Bank | 203,300 | $8M | 0.2% | 2026-Q1 |
| Allianz Asset Management GmbH added | 190,051 | $8M | 0.2% | 2026-Q1 |
| Kopion Asset Management, LLC added | 181,315 | $7M | 0.2% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 180,918 | $7M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 178,942 | $7M | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC added | 176,475 | $7M | 0.2% | 2026-Q1 |
| DekaBank Deutsche Girozentrale | 167,265 | $7M | 0.1% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 148,814 | $6M | 0.1% | 2026-Q1 |
| CITIGROUP INC trimmed | 146,682 | $6M | 0.1% | 2026-Q1 |
| Hillsdale Investment Management Inc. trimmed | 146,250 | $6M | 0.1% | 2026-Q1 |
| EULAV Asset Management | 141,823 | $6M | 0.1% | 2026-Q1 |
| Bridge City Capital, LLC added | 138,419 | $6M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 132,280 | $5M | 0.1% | 2026-Q1 |
| BESSEMER GROUP INC added | 128,565 | $5M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 122,760 | $5M | 0.1% | 2026-Q1 |
| SEIZERT CAPITAL PARTNERS, LLC added | 116,165 | $5M | 0.1% | 2026-Q1 |
| UniSuper Management Pty Ltd | 109,914 | $5M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 98,734 | $4M | 0.1% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 97,339 | $4M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 13,252,067 | $634M | 13.4% | 2025-Q4 stale |
| MACQUARIE GROUP LTD added | 1,050,134 | $55M | 1.2% | 2025-Q3 stale |
| Fiera Capital Corp trimmed | 653,944 | $36M | 0.8% | 2025-Q1 stale |
| OBERWEIS ASSET MANAGEMENT INC/ | 330,702 | $16M | 0.3% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 221,500 | $11M | 0.2% | 2025-Q4 stale |
| AXA Investment Managers S.A. new | 190,454 | $10M | 0.2% | 2025-Q3 stale |
| CW Advisors, LLC trimmed | 161,542 | $7M | 0.2% | 2025-Q2 stale |
| AXA S.A. | 153,935 | $7M | 0.1% | 2025-Q2 stale |
| Lingohr Asset Management GmbH added | 116,861 | $6M | 0.1% | 2025-Q1 stale |
| Edgestream Partners, L.P. added | 131,139 | $6M | 0.1% | 2025-Q4 stale |
| WINTON GROUP Ltd added | 123,588 | $6M | 0.1% | 2025-Q4 stale |
| HRT FINANCIAL LP trimmed | 112,948 | $5M | 0.1% | 2025-Q4 stale |
| Point72 Asset Management, L.P. added | 108,652 | $5M | 0.1% | 2025-Q4 stale |
| Global IMC LLC added | 83,755 | $5M | 0.1% | 2025-Q1 stale |
| Robeco Institutional Asset Management B.V. | 86,301 | $4M | 0.1% | 2025-Q4 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.