Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
540 institutional managers reported holding ALSN for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 50%. 91 opened new positions; 66 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 12.45M | 14.82% | $1.46B | added +0.6% | ≤2013 |
| Vanguard Group | 8.56M | 10.19% | $1.00B | unchanged | ≤2013 |
| BlackRock | 3.79M | 4.51% | $443.5M | added +1.3% | ≤2013 |
| Fuller & Thaler Asset Management, INC. | 3.39M | 4.04% | $397.4M | added +2.4% | 2019 Q2 |
| Boston Partners | 2.86M | 3.40% | $334.4M | added +23.3% | 2020 Q4 |
| Renaissance Technologies | 2.26M | 2.69% | $264.6M | trimmed -13% | 2013 Q3 |
| Geode Capital | 2.20M | 2.62% | $258.0M | added +12.4% | ≤2013 |
| LSV Asset Management | 2.13M | 2.54% | $249.4M | trimmed -6.7% | 2017 Q4 |
| First Trust Advisors LP | 2.03M | 2.41% | $237.2M | added +85.2% | ≤2013 |
| London CO OF Virginia | 1.91M | 2.27% | $223.0M | trimmed -9.3% | 2019 Q3 |
| Dimensional Fund Advisors | 1.90M | 2.26% | $222.6M | unchanged | ≤2013 |
| Bank OF Montreal /CAN/ | 1.55M | 1.85% | $181.7M | trimmed -27.9% | 2014 Q2 |
| State Street | 1.52M | 1.81% | $178.3M | added +2% | ≤2013 |
| Federated Hermes, INC. | 1.24M | 1.48% | $145.3M | trimmed -1.3% | 2014 Q2 |
| AQR Capital | 1.24M | 1.47% | $144.6M | trimmed -19.9% | 2013 Q4 |
| Bank OF America CORP /DE/ | 1.10M | 1.31% | $128.8M | added +12.3% | ≤2013 |
| Stockbridge Partners LLC (focused) | 1.03M | 1.23% | $120.6M | opened | 2026 Q1 |
| Invesco | 929.7k | 1.11% | $108.8M | trimmed -4.5% | ≤2013 |
| Charles Schwab Investment Management | 884.7k | 1.05% | $103.6M | added +2.8% | ≤2013 |
| Quantinno Capital Management LP | 867.8k | 1.03% | $101.6M | added +9.5% | 2021 Q4 |
| Balyasny Asset Management | 848.3k | 1.01% | $99.3M | added +53.8% | 2024 Q1 |
| Captrust Financial Advisors | 815.7k | 0.97% | $95.5M | added +440.2% | 2019 Q2 |
| Arrowstreet Capital | 802.8k | 0.96% | $94.0M | added +6.8% | 2022 Q4 |
| Allianz Asset Management GmbH | 740.5k | 0.88% | $86.7M | trimmed -10.2% | 2022 Q2 |
| Wasatch Advisors LP | 734.3k | 0.87% | $86.0M | trimmed -21.3% | 2023 Q2 |
| Morgan Stanley | 659.0k | 0.79% | $77.1M | trimmed -7.4% | ≤2013 |
| UBS | 631.7k | 0.75% | $74.0M | trimmed -57.5% | ≤2013 |
| NewEdge Wealth, LLC | 601.6k | 0.72% | $70.4M | added +7.4% | 2022 Q2 |
| Caisse de depot et placement du Quebec | 546.3k | 0.65% | $63.9M | added +1.3% | 2024 Q3 |
| Harris Associates (Oakmark) | 532.0k | 0.63% | $62.3M | trimmed -21.6% | 2021 Q1 |
| Seizert Capital Partners, LLC | 523.6k | 0.62% | $61.3M | trimmed -12.9% | 2019 Q2 |
| Freestone Grove Partners LP | 512.2k | 0.61% | $60.0M | added +815.6% | 2025 Q3 |
| Qube Research & Technologies LTD | 504.5k | 0.60% | $59.1M | trimmed -38.5% | 2019 Q4 |
| Brandes Investment Partners, LP | 500.9k | 0.60% | $58.6M | added +5.1% | 2025 Q4 |
| Janus Henderson | 491.1k | 0.58% | $57.5M | added +32.7% | 2021 Q3 |
| BNY Mellon | 475.8k | 0.57% | $55.7M | trimmed -2.2% | ≤2013 |
| Northern Trust | 470.0k | 0.56% | $55.0M | added +2.3% | ≤2013 |
| Fifthdelta LTD (focused) | 462.9k | 0.55% | $54.2M | trimmed -21.9% | 2025 Q4 |
| Raymond James Financial INC | 423.7k | 0.50% | $49.6M | added +48.9% | 2016 Q4 |
| Gotham Asset Management | 394.8k | 0.47% | $46.2M | trimmed -0.5% | 2021 Q3 |
| FIL LTD | 365.5k | 0.43% | $42.8M | added +45.2% | 2018 Q2 |
| T. Rowe Price | 365.3k | 0.43% | $42.8M | added +2.5% | 2013 Q3 |
| Victory Capital Management INC | 349.2k | 0.42% | $40.9M | added +170.6% | 2013 Q3 |
| Jain Global LLC | 346.7k | 0.41% | $40.6M | added +16268.6% | 2024 Q4 |
| Marshall Wace | 335.7k | 0.40% | $39.3M | added +423.8% | 2025 Q2 |
| Clifford Swan Investment Counsel LLC | 329.0k | 0.39% | $38.5M | trimmed -1.6% | 2021 Q2 |
| Jones Financial Companies Lllp | 325.8k | 0.39% | $38.1M | added +5879.4% | 2024 Q1 |
| Natixis Advisors, LLC | 324.3k | 0.39% | $38.0M | trimmed -10.5% | 2023 Q3 |
| Citadel Advisors | 304.7k | 0.36% | $35.7M | added +378.4% | 2016 Q3 |
| Schonfeld Strategic Advisors | 304.7k | 0.36% | $35.7M | trimmed -36.6% | 2024 Q3 |
Largest 50 of 540 shown; the full ranked, searchable register is at boothcheck.com/holders/ALSN. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.