Q3 2025 · 13F-HR
ACK Asset Management LLCholdings as filed
Filed 2025-11-14 · accession 0001510940-25-000006
$799.1M
Reported value
20
Positions
2025-09-30
Period end
The Brief · ACK Asset Management LLC · Q3 2025
AI · grounded in 13F
ACK Asset Management LLC closed its position in DY, reducing exposure by $54.9M. The fund established several new positions, led by a $48.4M investment in CNM. Other new additions include JHX at $40.3M and HLIO at $40.1M. The fund ended the period with 20 positions and total AUM of $799.1M.
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 29275Y102 | ENS | ENS | $66.0M | 8.26% | 584,324 | Common | SOLE |
| 576690101 | MTRN | MTRN | $63.4M | 7.93% | 524,800 | Common | SOLE |
| 387328107 | GVA | GVA | $59.8M | 7.48% | 545,000 | Common | SOLE |
| 046433108 | ATRO | ATRO | $56.1M | 7.02% | 1,230,000 | Common | SOLE |
| 00790R104 | WMS | WMS | $54.1M | 6.77% | 390,000 | Common | SOLE |
| 477839104 | JBTM | JBTM | $49.2M | 6.16% | 350,546 | Common | SOLE |
| 21874C102 | CNM | CNM | $48.4M | 6.06% | 900,000 | Common | SOLE |
| 00217Y104 | ATS | ATS | $48.4M | 6.05% | 1,846,196 | Common | SOLE |
| 012348108 | AIN | AIN | $40.5M | 5.07% | 760,000 | Common | SOLE |
| G4253H101 | JHX | JHX | $40.3M | 5.05% | 2,100,000 | Common | SOLE |
| 42328H109 | HLIO | HLIO | $40.1M | 5.02% | 770,000 | Common | SOLE |
| 82982L103 | SITE | SITE | $36.1M | 4.51% | 280,000 | Common | SOLE |
| 046224101 | ASTE | ASTE | $33.8M | 4.22% | 701,500 | Common | SOLE |
| 037598109 | APOG | APOG | $30.8M | 3.86% | 708,000 | Common | SOLE |
| 57638P104 | MBC | MBC | $30.3M | 3.79% | 2,300,000 | Common | SOLE |
| 155923105 | CTRI | CTRI | $29.1M | 3.64% | 1,375,000 | Common | SOLE |
| 18482P103 | CLFD | CLFD | $21.5M | 2.69% | 625,200 | Common | SOLE |
| 26969P108 | EXP | EXP | $21.0M | 2.62% | 90,000 | Common | SOLE |
| 651718504 | NPKI | NPKI | $17.8M | 2.23% | 1,576,808 | Common | SOLE |
| 23204X103 | CTOS | CTOS | $12.4M | 1.55% | 1,925,000 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.