ACK Asset Management LLC 13F Holdings · Q2 2026
ACK Asset Management LLC reported 20 securities worth $856.33M in its SEC 13F filing for Q2 2026 (period ended 2026-06-30). Top holdings: WMS (7.15%), HLIO (7.10%), LFUS (6.65%). Among its top 25 positions this quarter: 7 new, 5 added, 5 trimmed, 4 exited.
| Rank | Ticker | Company | Value | % Portfolio | Shares | Action |
|---|---|---|---|---|---|---|
| 1 | WMS | WMS | $61.2M | 7.15% | 390,000 | Hold |
| 2 | HLIO | HLIO | $60.8M | 7.10% | 681,000 | Trimmed |
| 3 | LFUS | LFUS | $56.9M | 6.65% | 125,000 | Trimmed |
| 4 | JHX | JHX | $55.0M | 6.42% | 2.1M | Hold |
| 5 | GTX | GTX | $54.3M | 6.35% | 1.5M | New |
| 6 | CNM | CNM | $52.6M | 6.14% | 1.1M | Added |
| 7 | EXP | EXP | $49.5M | 5.78% | 220,000 | Added |
| 8 | ATS | ATS | $43.2M | 5.04% | 1.5M | Trimmed |
| 9 | ASTE | ASTE | $42.2M | 4.93% | 690,276 | Trimmed |
| 10 | MTRN | MTRN | $40.1M | 4.69% | 135,000 | Trimmed |
| 11 | BWA | BWA | $39.8M | 4.65% | 600,000 | New |
| 12 | DNOW | DNOW | $38.9M | 4.54% | 3.0M | New |
| 13 | MBC | MBC | $38.1M | 4.45% | 3.7M | Hold |
| 14 | SITE | SITE | $37.8M | 4.41% | 330,000 | Hold |
| 15 | SWIM | SWIM | $36.6M | 4.28% | 5.7M | Added |
| 16 | CLFD | CLFD | $32.2M | 3.76% | 810,200 | Added |
| 17 | ST | ST | $28.6M | 3.34% | 600,000 | New |
| 18 | AERO-SWX | $28.5M | 3.32% | 1.1M | Added | |
| 19 | SHLS | SHLS | $22.3M | 2.61% | 2.3M | New |
| 20 | EQPT | EQPT | $20.9M | 2.44% | 1.1M | New |
| 21 | MEI | MEI | $16.6M | 1.94% | 877,500 | New |
| 22 | CDNL | CDNL | $0 | 0.00% | 0 | Exited |
| 23 | CTS | CTS | $0 | 0.00% | 0 | Exited |
| 24 | DXPE | DXPE | $0 | 0.00% | 0 | Exited |
| 25 | GVA | GVA | $0 | 0.00% | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30
Every position in this 13F-HR, with its change from the prior quarter.
13F holdings, latest quarter
SourceSEC EDGAR13F-HR