Who owns ALSN (ALSN)
Which tracked institutional funds hold ALSN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ALSN 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 ALSN is one-sided between 2025-Q4 and 2026-Q1: 218 added or opened and 71 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
ALSN’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.1% 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 ALSN 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 553 tracked filers holding ALSN, 275 increased or opened the position and 268 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 ALSN 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 36
- VANGUARD PORTFOLIO MANAGEMENT LLC$490M
- VANGUARD CAPITAL MANAGEMENT LLC$435M
- Stockbridge Partners LLC$121M
- VANGUARD FIDUCIARY TRUST CO$61M
- COOKSON PEIRCE & CO INC$22M
- J. Goldman & Co LP$21M
Full exits 33
- VANGUARD GROUP INC$826M
- VIRGINIA RETIREMENT SYSTEMS ET Al$31M
- Loews Corp$23M
- Assenagon Asset Management S.A.$19M
- CNA FINANCIAL CORP$14M
- Connor, Clark & Lunn Investment Management Ltd.$11M
Largest adds
- FMR LLC$240M
- FIRST TRUST ADVISORS LP$130M
- Boston Partners$108M
- CAPTRUST FINANCIAL ADVISORS$81M
- FULLER & THALER ASSET MANAGEMENT, INC.$73M
- GEODE CAPITAL MANAGEMENT, LLC$66M
Largest trims
- MILLENNIUM MANAGEMENT LLC$95M
- UBS Group AG$79M
- Amundi$29M
- BANK OF MONTREAL /CAN/$29M
- Qube Research & Technologies Ltd$21M
- NORGES BANK$13M
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 |
|---|---|---|---|---|
| FMR LLC added | 12,398,738 | $1.5B | 14.3% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 4,188,911 | $490M | 4.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,713,695 | $435M | 4.3% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 3,394,635 | $397M | 3.9% | 2026-Q1 |
| BlackRock, Inc. trimmed | 3,371,489 | $395M | 3.9% | 2026-Q1 |
| Boston Partners added | 2,856,610 | $334M | 3.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 2,260,397 | $265M | 2.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,204,268 | $258M | 2.5% | 2026-Q1 |
| LSV ASSET MANAGEMENT trimmed | 2,130,551 | $249M | 2.5% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 2,026,603 | $237M | 2.3% | 2026-Q1 |
| LONDON CO OF VIRGINIA trimmed | 1,905,273 | $223M | 2.2% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,901,860 | $223M | 2.2% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ trimmed | 1,552,208 | $182M | 1.8% | 2026-Q1 |
| STATE STREET CORP added | 1,523,239 | $178M | 1.8% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 1,241,477 | $145M | 1.4% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 1,232,653 | $142M | 1.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 1,100,162 | $129M | 1.3% | 2026-Q1 |
| Stockbridge Partners LLC new | 1,030,398 | $121M | 1.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 884,659 | $104M | 1.0% | 2026-Q1 |
| NORGES BANK trimmed | 1,068,823 | $102M | 1.0% | 2026-Q1 |
| Quantinno Capital Management LP added | 867,787 | $102M | 1.0% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 848,263 | $99M | 1.0% | 2026-Q1 |
| Invesco Ltd. trimmed | 828,281 | $97M | 1.0% | 2026-Q1 |
| CAPTRUST FINANCIAL ADVISORS added | 815,733 | $95M | 0.9% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 802,791 | $94M | 0.9% | 2026-Q1 |
| Allianz Asset Management GmbH trimmed | 740,468 | $87M | 0.9% | 2026-Q1 |
| WASATCH ADVISORS LP trimmed | 734,327 | $86M | 0.8% | 2026-Q1 |
| MORGAN STANLEY trimmed | 659,023 | $77M | 0.8% | 2026-Q1 |
| NewEdge Wealth, LLC added | 601,636 | $70M | 0.7% | 2026-Q1 |
| Caisse de depot et placement du Quebec added | 546,271 | $64M | 0.6% | 2026-Q1 |
| HARRIS ASSOCIATES L P trimmed | 532,007 | $62M | 0.6% | 2026-Q1 |
| SEIZERT CAPITAL PARTNERS, LLC trimmed | 523,585 | $61M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 518,974 | $61M | 0.6% | 2026-Q1 |
| Freestone Grove Partners LP added | 512,186 | $60M | 0.6% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 504,484 | $59M | 0.6% | 2026-Q1 |
| BRANDES INVESTMENT PARTNERS, LP added | 500,894 | $59M | 0.6% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 491,105 | $58M | 0.6% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 475,786 | $56M | 0.5% | 2026-Q1 |
| NORTHERN TRUST CORP added | 470,007 | $55M | 0.5% | 2026-Q1 |
| FIFTHDELTA Ltd trimmed | 462,874 | $54M | 0.5% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 423,728 | $50M | 0.5% | 2026-Q1 |
| Gotham Asset Management, LLC trimmed | 394,834 | $46M | 0.5% | 2026-Q1 |
| UBS Group AG trimmed | 370,289 | $43M | 0.4% | 2026-Q1 |
| FIL Ltd added | 365,549 | $43M | 0.4% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 365,332 | $43M | 0.4% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 349,231 | $41M | 0.4% | 2026-Q1 |
| Jain Global LLC added | 346,686 | $41M | 0.4% | 2026-Q1 |
| MARSHALL WACE, LLP added | 335,738 | $39M | 0.4% | 2026-Q1 |
| CLIFFORD SWAN INVESTMENT COUNSEL LLC trimmed | 329,022 | $39M | 0.4% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 338,342 | $38M | 0.4% | 2026-Q1 |
| NATIXIS ADVISORS, LLC added | 324,347 | $38M | 0.4% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP added | 325,817 | $37M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 304,746 | $36M | 0.4% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 304,738 | $36M | 0.4% | 2026-Q1 |
| Solidarity Wealth, LLC added | 299,967 | $35M | 0.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 298,164 | $35M | 0.3% | 2026-Q1 |
| Woodline Partners LP added | 283,427 | $33M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 261,434 | $31M | 0.3% | 2026-Q1 |
| Polaris Capital Management, LLC trimmed | 258,600 | $30M | 0.3% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC added | 254,624 | $30M | 0.3% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 240,802 | $28M | 0.3% | 2026-Q1 |
| SEI INVESTMENTS CO added | 240,179 | $28M | 0.3% | 2026-Q1 |
| Nuveen, LLC trimmed | 239,666 | $28M | 0.3% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 279,004 | $27M | 0.3% | 2026-Q1 |
| Empowered Funds, LLC added | 227,271 | $27M | 0.3% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 223,911 | $26M | 0.3% | 2026-Q1 |
| Driehaus Capital Management LLC added | 219,126 | $26M | 0.3% | 2026-Q1 |
| BURNEY CO/ trimmed | 216,320 | $25M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 215,685 | $25M | 0.2% | 2026-Q1 |
| Arbejdsmarkedets Tillaegspension trimmed | 214,917 | $25M | 0.2% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 209,796 | $25M | 0.2% | 2026-Q1 |
| NORRIS PERNE & FRENCH LLP/MI trimmed | 209,667 | $25M | 0.2% | 2026-Q1 |
| Walleye Capital LLC trimmed | 207,974 | $24M | 0.2% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 204,203 | $24M | 0.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 195,226 | $23M | 0.2% | 2026-Q1 |
| Vest Financial, LLC added | 190,232 | $22M | 0.2% | 2026-Q1 |
| COOKSON PEIRCE & CO INC added | 185,098 | $22M | 0.2% | 2026-Q1 |
| J. Goldman & Co LP added | 182,258 | $21M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System added | 177,921 | $21M | 0.2% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 173,045 | $20M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 172,605 | $20M | 0.2% | 2026-Q1 |
| Swiss National Bank trimmed | 164,600 | $19M | 0.2% | 2026-Q1 |
| DUDLEY & SHANLEY, INC. | 164,597 | $19M | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 164,403 | $19M | 0.2% | 2026-Q1 |
| BRUNI J V & CO /CO trimmed | 157,283 | $18M | 0.2% | 2026-Q1 |
| ALPS ADVISORS INC trimmed | 150,124 | $18M | 0.2% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 143,059 | $17M | 0.2% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 141,056 | $17M | 0.2% | 2026-Q1 |
| ISTHMUS PARTNERS, LLC trimmed | 139,314 | $16M | 0.2% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC added | 136,601 | $16M | 0.2% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 8,435,336 | $826M | 8.1% | 2025-Q4 stale |
| Burgundy Asset Management Ltd. trimmed | 2,210,926 | $193M | 1.9% | 2025-Q3 stale |
| Prevatt Capital Ltd | 395,000 | $38M | 0.4% | 2025-Q1 stale |
| VIRGINIA RETIREMENT SYSTEMS ET Al trimmed | 311,871 | $31M | 0.3% | 2025-Q4 stale |
| Pacer Advisors, Inc. trimmed | 332,466 | $28M | 0.3% | 2025-Q3 stale |
| Robeco Institutional Asset Management B.V. trimmed | 285,487 | $27M | 0.3% | 2025-Q2 stale |
| Loews Corp new | 230,000 | $23M | 0.2% | 2025-Q4 stale |
| Assenagon Asset Management S.A. trimmed | 188,969 | $19M | 0.2% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC trimmed | 195,159 | $17M | 0.2% | 2025-Q3 stale |
| Engineers Gate Manager LP added | 194,123 | $16M | 0.2% | 2025-Q3 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.