ACK Asset Management LLC 13F holdings, Q2 2025
Holdings as of June 30, 2025 · filings on SEC EDGAR · latest filing →
ACK Asset Management LLC disclosed 21 US equity positions worth $761.4m in its Q2 2025 13F filing. The largest position was ATRO at 9.1% of the reported book, followed by ATS and DY. Against the Q1 2025 filing, it opened 6 new positions, added to 5 and reduced 9 among the top 21 holdings.
What did ACK Asset Management LLC own in Q2 2025? Top 21 positions
| # | Stock | Sector | Weight | Value | Shares | Δ shares | vs Q1 2025 |
|---|---|---|---|---|---|---|---|
| 1 | ATRO ATRO | Industrials | 9.1% | $69.0m | 2,060,000 | 0% | held |
| 2 | ATS ATS | 7.7% | $58.9m | 1,846,196 | -8% | reduced | |
| 3 | DY DY | Industrials | 7.2% | $54.9m | 224,700 | -41% | reduced |
| 4 | GVA GVA | Industrials | 6.7% | $51.0m | 545,000 | 186% | added |
| 5 | ENS ENS | Industrials | 6.6% | $50.1m | 584,324 | -6% | reduced |
| 6 | MYRG MYRG | Industrials | 6.3% | $48.1m | 265,200 | -5% | reduced |
| 7 | CTRI CTRI | Utilities | 6.0% | $45.6m | 2,032,000 | 66% | added |
| 8 | JBTM JBTM | Industrials | 5.5% | $42.2m | 350,546 | -5% | reduced |
| 9 | MTRN MTRN | Basic Materials | 5.5% | $41.7m | 524,800 | 14% | added |
| 10 | AIN AIN | Consumer Cyclical | 5.4% | $41.0m | 585,000 | – | new |
| 11 | RRX RRX | Industrials | 5.2% | $39.9m | 275,000 | – | new |
| 12 | WMS WMS | Industrials | 5.2% | $39.6m | 345,000 | – | new |
| 13 | 37M MRC | 4.1% | $31.1m | 2,267,000 | 45% | added | |
| 14 | SITE SITE | Industrials | 4.0% | $30.2m | 250,000 | 150% | added |
| 15 | MIR MIR | Industrials | 3.8% | $28.8m | 1,337,000 | -17% | reduced |
| 16 | CLFD CLFD | Technology | 3.6% | $27.1m | 625,200 | -9% | reduced |
| 17 | MTZ MTZ | Industrials | 2.8% | $21.3m | 125,000 | -73% | reduced |
| 18 | MTRX MTRX | 1.9% | $14.7m | 1,087,100 | -8% | reduced | |
| 19 | NPKI NPKI | Industrials | 1.4% | $10.4m | 1,226,808 | – | new |
| 20 | CTOS CTOS | 1.2% | $9.3m | 1,875,000 | – | new | |
| 21 | DXPE DXPE | Industrials | 0.9% | $6.6m | 75,600 | – | new |
Weights are shares of the reported long US equity book (options excluded). Values are as filed, normalised to whole dollars. Share changes compare against the immediately preceding filing only.