Q4 2025 · 13F-HR
ACK Asset Management LLCholdings as filed
Filed 2026-02-13 · accession 0001510940-26-000001
$796.8M
Reported value
23
Positions
2025-12-31
Period end
The Brief · ACK Asset Management LLC · Q4 2025
AI · grounded in 13F
ACK Asset Management LLC closed its position in JBTM, reducing exposure by $49.2M. The fund established new positions in NOVT for $44.6M and ROG for $39.9M. Other notable activity includes a new $26.3M stake in DXPE and an 83.3% increase in shares of EXP.
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 576690101 | MTRN | MTRN | $59.0M | 7.41% | 474,800 | Common | SOLE |
| 387328107 | GVA | GVA | $57.7M | 7.24% | 500,000 | Common | SOLE |
| 00790R104 | WMS | WMS | $56.5M | 7.09% | 390,000 | Common | SOLE |
| 00217Y104 | ATS | ATS | $50.8M | 6.38% | 1,846,196 | Common | SOLE |
| 21874C102 | CNM | CNM | $46.8M | 5.87% | 900,000 | Common | SOLE |
| 29275Y102 | ENS | ENS | $44.7M | 5.61% | 304,324 | Common | SOLE |
| 67000B104 | NOVT | NOVT | $44.6M | 5.60% | 375,000 | Common | SOLE |
| G4253H101 | JHX | JHX | $43.6M | 5.47% | 2,100,000 | Common | SOLE |
| 42328H109 | HLIO | HLIO | $41.7M | 5.24% | 780,378 | Common | SOLE |
| 82982L103 | SITE | SITE | $41.1M | 5.16% | 330,000 | Common | SOLE |
| 775133101 | ROG | ROG | $40.0M | 5.02% | 436,707 | Common | SOLE |
| 26969P108 | EXP | EXP | $34.1M | 4.28% | 165,000 | Common | SOLE |
| 046224101 | ASTE | ASTE | $34.1M | 4.28% | 786,500 | Common | SOLE |
| 046433108 | ATRO | ATRO | $32.4M | 4.07% | 597,469 | Common | SOLE |
| 012348108 | AIN | AIN | $30.4M | 3.82% | 600,000 | Common | SOLE |
| 037598109 | APOG | APOG | $29.6M | 3.72% | 813,000 | Common | SOLE |
| 233377407 | DXPE | DXPE | $26.3M | 3.31% | 240,000 | Common | SOLE |
| 57638P104 | MBC | MBC | $25.4M | 3.19% | 2,300,000 | Common | SOLE |
| 14154A102 | CDNL | CDNL | $20.4M | 2.56% | 844,591 | Common | SOLE |
| 18482P103 | CLFD | CLFD | $18.2M | 2.29% | 625,200 | Common | SOLE |
| 29270J100 | ERII | ERII | $9.1M | 1.15% | 677,251 | Common | SOLE |
| H55555108 | MTASF | AERO-SWX | $5.5M | 0.69% | 154,851 | Common | SOLE |
| 23204X103 | CTOS | CTOS | $4.6M | 0.58% | 800,136 | 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.