Who owns ACU (ACU)
Which tracked institutional funds hold ACU, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACU 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 ACU is one-sided between 2025-Q4 and 2026-Q1: 18 added or opened and 2 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
ACU’s largest tracked holder by dollar value, CAPITAL MANAGEMENT CORP /VA, sizes it at 3.8% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 3.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ACU 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 72 tracked filers holding ACU, 36 increased or opened the position and 30 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 ACU 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 5
- VANGUARD CAPITAL MANAGEMENT LLC$6M
- Vinva Investment Management Ltd$1M
- VANGUARD FIDUCIARY TRUST CO$945K
- VANGUARD PORTFOLIO MANAGEMENT LLC$870K
- Ridgewood Investments LLC$509K
Full exits 2
- VANGUARD GROUP INC$7M
- Janney Montgomery Scott LLC$683K
Largest adds
- Mink Brook Asset Management LLC$2M
- North Star Investment Management Corp.$1M
- ACADIAN ASSET MANAGEMENT LLC$837K
- DIMENSIONAL FUND ADVISORS LP$783K
- Mork Capital Management, LLC$725K
- CAPITAL MANAGEMENT CORP /VA$717K
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 |
|---|---|---|---|---|
| CAPITAL MANAGEMENT CORP /VA trimmed | 500,967 | $22M | 16.2% | 2026-Q1 |
| Mink Brook Asset Management LLC added | 380,643 | $17M | 12.3% | 2026-Q1 |
| North Star Investment Management Corp. added | 252,639 | $11M | 8.2% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 171,577 | $8M | 5.6% | 2026-Q1 |
| BlackRock, Inc. trimmed | 165,690 | $7M | 5.4% | 2026-Q1 |
| ROYCE & ASSOCIATES LP trimmed | 146,403 | $7M | 4.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 140,992 | $6M | 4.6% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 116,558 | $5M | 3.8% | 2026-Q1 |
| BARD ASSOCIATES INC added | 109,409 | $5M | 3.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 76,901 | $3M | 2.5% | 2026-Q1 |
| Mork Capital Management, LLC added | 70,000 | $3M | 2.3% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 64,543 | $3M | 2.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC | 45,823 | $2M | 1.5% | 2026-Q1 |
| STATE STREET CORP added | 42,257 | $2M | 1.4% | 2026-Q1 |
| BROWN BROTHERS HARRIMAN & CO | 33,370 | $1M | 1.1% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 30,959 | $1M | 1.0% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 30,469 | $1M | 1.0% | 2026-Q1 |
| AE Wealth Management LLC trimmed | 30,415 | $1M | 1.0% | 2026-Q1 |
| Vinva Investment Management Ltd new | 4,283 | $1M | 0.9% | 2026-Q1 |
| FIRST MANHATTAN CO. LLC. trimmed | 27,505 | $1M | 0.9% | 2026-Q1 |
| NORTHERN TRUST CORP added | 24,415 | $1M | 0.8% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 21,041 | $945K | 0.7% | 2026-Q1 |
| Nantahala Capital Management, LLC | 20,427 | $917K | 0.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 20,244 | $909K | 0.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 19,369 | $870K | 0.6% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 19,257 | $865K | 0.6% | 2026-Q1 |
| DIAMOND HILL CAPITAL MANAGEMENT INC trimmed | 18,914 | $849K | 0.6% | 2026-Q1 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC added | 18,164 | $816K | 0.6% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 17,429 | $783K | 0.6% | 2026-Q1 |
| Indivisible Partners added | 14,919 | $670K | 0.5% | 2026-Q1 |
| UBS Group AG added | 14,612 | $656K | 0.5% | 2026-Q1 |
| Advyzon Investment Management, LLC added | 14,046 | $631K | 0.5% | 2026-Q1 |
| Ridgewood Investments LLC trimmed | 11,329 | $509K | 0.4% | 2026-Q1 |
| RITHOLTZ WEALTH MANAGEMENT trimmed | 10,657 | $479K | 0.3% | 2026-Q1 |
| Teton Advisors, LLC | 10,000 | $449K | 0.3% | 2026-Q1 |
| Quantinno Capital Management LP trimmed | 8,973 | $403K | 0.3% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 8,608 | $387K | 0.3% | 2026-Q1 |
| Manatuck Hill Partners, LLC added | 7,937 | $356K | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 6,952 | $312K | 0.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 6,486 | $291K | 0.2% | 2026-Q1 |
| Empowered Funds, LLC new | 5,212 | $234K | 0.2% | 2026-Q1 |
| Evercore Wealth Management, LLC | 5,100 | $229K | 0.2% | 2026-Q1 |
| JAMES INVESTMENT RESEARCH, INC. added | 4,824 | $217K | 0.2% | 2026-Q1 |
| &PARTNERS trimmed | 4,614 | $207K | 0.1% | 2026-Q1 |
| Wilmington Savings Fund Society, FSB trimmed | 3,500 | $157K | 0.1% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 2,500 | $112K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 2,415 | $108K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 1,758 | $79K | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 1,641 | $74K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 1,386 | $61K | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 1,271 | $57K | 0.0% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 1,207 | $54K | 0.0% | 2026-Q1 |
| BARCLAYS PLC trimmed | 849 | $38K | 0.0% | 2026-Q1 |
| Police & Firemen's Retirement System of New Jersey | 752 | $34K | 0.0% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 746 | $34K | 0.0% | 2026-Q1 |
| FMR LLC added | 684 | $31K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 463 | $21K | 0.0% | 2026-Q1 |
| Ameritas Investment Partners, Inc. | 339 | $15K | 0.0% | 2026-Q1 |
| Legal & General Group Plc | 300 | $13K | 0.0% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 296 | $13K | 0.0% | 2026-Q1 |
| CITIGROUP INC added | 247 | $11K | 0.0% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 182 | $8K | 0.0% | 2026-Q1 |
| NewEdge Advisors, LLC added | 5,955 | $6K | 0.0% | 2026-Q1 |
| Sterling Capital Management LLC trimmed | 111 | $5K | 0.0% | 2026-Q1 |
| CWM, LLC | 40 | $2K | 0.0% | 2026-Q1 |
| Strive Financial Group ,LLC | 14 | $1K | 0.0% | 2026-Q1 |
| Covestor Ltd trimmed | 23 | $1K | 0.0% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC new | 10 | $449 | 0.0% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. trimmed | 7 | $314 | 0.0% | 2026-Q1 |
| Essential Partners LLC | 7 | $314 | 0.0% | 2026-Q1 |
| IFP Advisors, Inc | 2 | $90 | 0.0% | 2026-Q1 |
| ROTHSCHILD INVESTMENT LLC | 1 | $45 | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 181,178 | $7M | 5.3% | 2025-Q4 stale |
| MILLENNIUM MANAGEMENT LLC added | 23,678 | $938K | 0.7% | 2025-Q1 stale |
| HOWARD BAILEY SECURITIES, LLC new | 20,000 | $792K | 0.6% | 2025-Q1 stale |
| Aristides Capital LLC | 17,567 | $696K | 0.5% | 2025-Q1 stale |
| Janney Montgomery Scott LLC trimmed | 16,945 | $683K | 0.5% | 2025-Q4 stale |
| FIRST TRUST ADVISORS LP added | 10,647 | $441K | 0.3% | 2025-Q2 stale |
| HighTower Advisors, LLC added | 10,659 | $422K | 0.3% | 2025-Q1 stale |
| Teton Advisors, Inc. trimmed | 10,000 | $414K | 0.3% | 2025-Q2 stale |
| JANE STREET GROUP, LLC added | 9,839 | $390K | 0.3% | 2025-Q1 stale |
| Cetera Investment Advisers trimmed | 5,332 | $215K | 0.2% | 2025-Q4 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 5,169 | $214K | 0.2% | 2025-Q2 stale |
| SEI INVESTMENTS CO trimmed | 5,254 | $208K | 0.1% | 2025-Q1 stale |
| BANK OF AMERICA CORP /DE/ added | 2,623 | $106K | 0.1% | 2025-Q4 stale |
| LOS ANGELES CAPITAL MANAGEMENT LLC trimmed | 2,274 | $87K | 0.1% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 1,839 | $76K | 0.1% | 2025-Q2 stale |
| LAZARD ASSET MANAGEMENT LLC added | 365 | $15K | 0.0% | 2025-Q2 stale |
| McIlrath & Eck, LLC | 252 | $10K | 0.0% | 2025-Q2 stale |
| Perritt Capital Management Inc added | 204 | $8K | 0.0% | 2025-Q3 stale |
| OSAIC HOLDINGS, INC. | 178 | $7K | 0.0% | 2025-Q2 stale |
| AMALGAMATED BANK trimmed | 106 | $4K | 0.0% | 2025-Q4 stale |
| COMERICA BANK | 61 | $2K | 0.0% | 2025-Q4 stale |
| Arax Advisory Partners new | 54 | $2K | 0.0% | 2025-Q3 stale |
| EverSource Wealth Advisors, LLC added | 44 | $2K | 0.0% | 2025-Q3 stale |
| GAMMA Investing LLC | 22 | $906 | 0.0% | 2025-Q3 stale |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 6 | $238 | 0.0% | 2025-Q1 stale |
| Allworth Financial LP trimmed | 1 | $41 | 0.0% | 2025-Q4 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 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.