Q1 2025 · 13F-HR
ACK Asset Management LLCholdings as filed
Filed 2025-05-13 · accession 0001510940-25-000002
$609.0M
Reported value
20
Positions
2025-03-31
Period end
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 267475101 | DY | DYCOM INDUSTRIES INC | $58.3M | 9.58% | 382,800 | Common | SOLE |
| 29275Y102 | ENS | ENERSYS | $57.2M | 9.39% | 624,324 | Common | SOLE |
| 576323109 | MTZ | MASTEC INC | $54.0M | 8.87% | 462,700 | Common | SOLE |
| 00217Y104 | ATS | ATS CORP | $50.2M | 8.24% | 2,013,196 | Common | SOLE |
| 046433108 | ATRO | ASTRONICS CORP | $49.8M | 8.18% | 2,060,000 | Common | SOLE |
| 477839104 | JBTM | JBT MAREL CORPORATION | $45.2M | 7.42% | 369,800 | Common | SOLE |
| 576690101 | MTRN | MATERION CORP | $37.5M | 6.15% | 459,200 | Common | SOLE |
| 775133101 | ROG | ROGERS CORP | $34.9M | 5.74% | 517,500 | Common | SOLE |
| 55405W104 | MYRG | MYR GROUP INC | $31.6M | 5.18% | 279,100 | Common | SOLE |
| 125141101 | CECO | CECO ENVIRONMENTAL CORP | $27.4M | 4.50% | 1,201,000 | Common | SOLE |
| 60471A101 | MIR | MIRION TECHNOLOGIES INC | $23.5M | 3.85% | 1,618,356 | Common | SOLE |
| 18482P103 | CLFD | CLEARFIELD INC | $20.4M | 3.35% | 687,200 | Common | SOLE |
| 155923105 | CTRI | CENTURI HOLDINGS INC. | $20.0M | 3.29% | 1,220,591 | Common | SOLE |
| 55345K103 | 37M | MRC GLOBAL INC | $18.0M | 2.95% | 1,565,000 | Common | SOLE |
| 57638P104 | MBC | MASTERBRAND INC | $17.0M | 2.79% | 1,302,500 | Common | SOLE |
| 09076P104 | — | BIRD CONSTRUCTION INC | $17.0M | 2.79% | 1,120,800 | Common | SOLE |
| 576853105 | MTRX | MATRIX SERVICE CO | $14.7M | 2.42% | 1,184,100 | Common | SOLE |
| 387328107 | GVA | GRANITE CONSTRUCTION INC | $14.4M | 2.36% | 190,700 | Common | SOLE |
| 82982L103 | SITE | SITEONE LANDSCAPE SUPPLY INC | $12.1M | 1.99% | 100,000 | Common | SOLE |
| 65487K100 | LASR | NLIGHT INC | $5.9M | 0.96% | 754,000 | 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.