Who owns ACI (ACI)
Which tracked institutional funds hold ACI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACI 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
94 tracked funds added or opened ACI while 120 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
ACI’s largest tracked holder by dollar value, Cerberus Capital Management, L.P., sizes it at 98.4% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 98.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ACI 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 438 tracked filers holding ACI, 229 increased or opened the position and 236 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 ACI 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 33
- VANGUARD PORTFOLIO MANAGEMENT LLC$310M
- VANGUARD CAPITAL MANAGEMENT LLC$276M
- Woodline Partners LP$60M
- SHAPIRO CAPITAL MANAGEMENT LLC$39M
- VANGUARD FIDUCIARY TRUST CO$39M
- Fidelity National Financial, Inc.$15M
Full exits 39
- VANGUARD GROUP INC$663M
- VIRGINIA RETIREMENT SYSTEMS ET Al$50M
- Qube Research & Technologies Ltd$44M
- Trexquant Investment LP$15M
- Brandywine Global Investment Management, LLC$13M
- CANADA LIFE ASSURANCE Co$11M
Largest adds
- JPMORGAN CHASE & CO$71M
- CITADEL ADVISORS LLC$31M
- DIMENSIONAL FUND ADVISORS LP$25M
- BlackRock, Inc.$21M
- SOUTHEASTERN ASSET MANAGEMENT INC/TN/$21M
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/$20M
Largest trims
- FMR LLC$85M
- Allianz Asset Management GmbH$51M
- MORGAN STANLEY$36M
- NORGES BANK$33M
- JANE STREET GROUP, LLC$30M
- Cerberus Capital Management, L.P.$20M
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 |
|---|---|---|---|---|
| Cerberus Capital Management, L.P. | 151,818,680 | $2.6B | 29.4% | 2026-Q1 |
| BlackRock, Inc. added | 38,096,453 | $649M | 7.4% | 2026-Q1 |
| NORGES BANK trimmed | 16,139,127 | $355M | 4.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 18,181,489 | $310M | 3.5% | 2026-Q1 |
| FMR LLC trimmed | 16,257,257 | $277M | 3.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 16,218,110 | $276M | 3.1% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 15,013,525 | $256M | 2.9% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 13,138,813 | $228M | 2.6% | 2026-Q1 |
| STATE STREET CORP trimmed | 12,354,305 | $211M | 2.4% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 12,053,346 | $205M | 2.3% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 11,757,178 | $202M | 2.3% | 2026-Q1 |
| LSV ASSET MANAGEMENT added | 11,186,507 | $191M | 2.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 9,690,536 | $165M | 1.9% | 2026-Q1 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ added | 7,419,801 | $126M | 1.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 7,356,031 | $125M | 1.4% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 5,971,409 | $102M | 1.2% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 5,278,839 | $90M | 1.0% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 5,179,432 | $88M | 1.0% | 2026-Q1 |
| SOUND SHORE MANAGEMENT INC /CT/ trimmed | 4,134,360 | $70M | 0.8% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 3,569,833 | $61M | 0.7% | 2026-Q1 |
| Woodline Partners LP added | 3,522,398 | $60M | 0.7% | 2026-Q1 |
| Invesco Ltd. trimmed | 3,437,718 | $59M | 0.7% | 2026-Q1 |
| UBS Group AG trimmed | 3,016,860 | $51M | 0.6% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 2,945,195 | $50M | 0.6% | 2026-Q1 |
| PRIVATE MANAGEMENT GROUP INC trimmed | 2,399,328 | $41M | 0.5% | 2026-Q1 |
| SHAPIRO CAPITAL MANAGEMENT LLC new | 2,289,870 | $39M | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 2,287,367 | $39M | 0.4% | 2026-Q1 |
| E. Ohman J:or Asset Management AB added | 2,036,014 | $35M | 0.4% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,972,924 | $34M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 1,899,233 | $32M | 0.4% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 1,791,043 | $31M | 0.3% | 2026-Q1 |
| SEIZERT CAPITAL PARTNERS, LLC trimmed | 1,731,974 | $30M | 0.3% | 2026-Q1 |
| Parsifal Capital Management, LP trimmed | 1,721,193 | $29M | 0.3% | 2026-Q1 |
| Arbejdsmarkedets Tillaegspension added | 1,502,764 | $26M | 0.3% | 2026-Q1 |
| Gotham Asset Management, LLC trimmed | 1,489,238 | $25M | 0.3% | 2026-Q1 |
| Quantinno Capital Management LP added | 1,450,673 | $25M | 0.3% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 1,409,419 | $24M | 0.3% | 2026-Q1 |
| SEI INVESTMENTS CO added | 1,297,318 | $22M | 0.3% | 2026-Q1 |
| DekaBank Deutsche Girozentrale | 1,217,131 | $22M | 0.2% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 1,148,014 | $20M | 0.2% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 1,051,572 | $18M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 1,006,267 | $17M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 905,650 | $15M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 899,715 | $15M | 0.2% | 2026-Q1 |
| Clearstead Advisors, LLC trimmed | 888,522 | $15M | 0.2% | 2026-Q1 |
| Fidelity National Financial, Inc. new | 880,000 | $15M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 870,519 | $15M | 0.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 825,500 | $14M | 0.2% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 818,868 | $14M | 0.2% | 2026-Q1 |
| AMERICAN FINANCIAL GROUP INC | 786,786 | $13M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 720,300 | $12M | 0.1% | 2026-Q1 |
| TOWERVIEW LLC added | 700,000 | $12M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 664,497 | $11M | 0.1% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 662,807 | $11M | 0.1% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 620,282 | $11M | 0.1% | 2026-Q1 |
| River Road Asset Management, LLC added | 617,740 | $11M | 0.1% | 2026-Q1 |
| Allianz Asset Management GmbH trimmed | 608,215 | $10M | 0.1% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 601,637 | $10M | 0.1% | 2026-Q1 |
| STOREBRAND ASSET MANAGEMENT AS added | 594,827 | $10M | 0.1% | 2026-Q1 |
| Jump Financial, LLC added | 565,020 | $10M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 565,002 | $10M | 0.1% | 2026-Q1 |
| Nuveen, LLC added | 560,756 | $10M | 0.1% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 545,687 | $9M | 0.1% | 2026-Q1 |
| Alberta Investment Management Corp | 528,300 | $9M | 0.1% | 2026-Q1 |
| Holocene Advisors, LP added | 498,032 | $8M | 0.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 467,979 | $8M | 0.1% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 467,503 | $8M | 0.1% | 2026-Q1 |
| Korea Investment CORP added | 457,688 | $8M | 0.1% | 2026-Q1 |
| Retirement Systems of Alabama trimmed | 453,620 | $8M | 0.1% | 2026-Q1 |
| Engineers Gate Manager LP added | 427,222 | $7M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 422,999 | $7M | 0.1% | 2026-Q1 |
| Mitsubishi UFJ Trust & Banking Corp trimmed | 421,267 | $7M | 0.1% | 2026-Q1 |
| BARCLAYS PLC trimmed | 409,461 | $7M | 0.1% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 404,627 | $7M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 38,598,922 | $663M | 7.5% | 2025-Q4 stale |
| Cartenna Capital, LP added | 2,600,000 | $56M | 0.6% | 2025-Q2 stale |
| VIRGINIA RETIREMENT SYSTEMS ET Al trimmed | 2,887,200 | $50M | 0.6% | 2025-Q4 stale |
| DENDUR CAPITAL LP | 2,100,000 | $45M | 0.5% | 2025-Q2 stale |
| Qube Research & Technologies Ltd added | 2,568,880 | $44M | 0.5% | 2025-Q4 stale |
| Interval Partners, LP trimmed | 1,600,452 | $34M | 0.4% | 2025-Q2 stale |
| Candlestick Capital Management LP trimmed | 1,429,095 | $31M | 0.4% | 2025-Q1 stale |
| Apollo Management Holdings, L.P. trimmed | 1,465,000 | $26M | 0.3% | 2025-Q3 stale |
| MARSHALL WACE, LLP added | 1,301,780 | $23M | 0.3% | 2025-Q3 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 1,255,233 | $22M | 0.2% | 2025-Q3 stale |
| RENAISSANCE TECHNOLOGIES LLC added | 1,027,080 | $18M | 0.2% | 2025-Q3 stale |
| Luxor Capital Group, LP trimmed | 675,814 | $15M | 0.2% | 2025-Q1 stale |
| Trexquant Investment LP added | 860,383 | $15M | 0.2% | 2025-Q4 stale |
| Railway Pension Investments Ltd | 768,000 | $13M | 0.2% | 2025-Q3 stale |
| Sumitomo Mitsui Trust Group, Inc. added | 762,885 | $13M | 0.2% | 2025-Q3 stale |
| Brandywine Global Investment Management, LLC added | 774,086 | $13M | 0.2% | 2025-Q4 stale |
| CANADA LIFE ASSURANCE Co trimmed | 650,018 | $11M | 0.1% | 2025-Q4 stale |
| Achmea Investment Management B.V. trimmed | 575,382 | $10M | 0.1% | 2025-Q3 stale |
| Driehaus Capital Management LLC | 451,942 | $10M | 0.1% | 2025-Q1 stale |
| Corebridge Financial, Inc. added | 448,046 | $10M | 0.1% | 2025-Q1 stale |
| AXA S.A. trimmed | 399,721 | $9M | 0.1% | 2025-Q2 stale |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC trimmed | 459,093 | $8M | 0.1% | 2025-Q3 stale |
| Portolan Capital Management, LLC trimmed | 351,629 | $8M | 0.1% | 2025-Q2 stale |
| Verition Fund Management LLC trimmed | 438,599 | $8M | 0.1% | 2025-Q4 stale |
| Boston Partners added | 337,470 | $7M | 0.1% | 2025-Q1 stale |
| Skandinaviska Enskilda Banken AB (publ) trimmed | 415,234 | $7M | 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.