StockDriftsStockDriftsTop 20 Ack Asset Management LLC Holdings
| Stock | Company | % Port. | Shares | Value | Activity | Ownership | Avg. Cost | Date |
|---|---|---|---|---|---|---|---|---|
| WMS | WMS | 7.15% | 390.0K | $61.2M | +0.00%(+0) | $113.29(+29.49%) | 2026-06-30 | |
| HLIO | HLIO | 7.1% | 681.0K | $60.8M | -12.73%(-99.38K) | $42.88(+89.13%) | 2026-06-30 | |
| LFUS | LFUS | 6.65% | 125.0K | $56.9M | -7.41%(-10.00K) | $296.14(+55.00%) | 2026-06-30 | |
| JHX | JHX | 6.42% | 2.10M | $55.0M | +0.00%(+0) | $23.05(+33.88%) | 2026-06-30 | |
| GTX | GTX | 6.35% | 1.50M | $54.3M | new | $26.87(+9.19%) | 2026-06-30 | |
| CNM | CNM | 6.14% | 1.09M | $52.6M | +21.11%(+190.00K) | $28.27(+62.95%) | 2026-06-30 | |
| EXP | EXP | 5.78% | 220.0K | $49.5M | +33.33%(+55.00K) | $214.77(-1.77%) | 2026-06-30 | |
| ATS | ATS | 5.04% | 1.50M | $43.2M | -18.75%(-346.20K) | $32.49(-37.36%) | 2026-06-30 | |
| ASTE | ASTE | 4.93% | 690.3K | $42.2M | -12.23%(-96.22K) | $45.00(-4.35%) | 2026-06-30 | |
| MTRN | MTRN | 4.69% | 135.0K | $40.1M | -71.57%(-339.80K) | $70.46(+304.23%) | 2026-06-30 |
| Performance Metric | 3-Year Annualized | 3-Year Cumulative | 5-Year Annualized | 5-Year Cumulative |
|---|---|---|---|---|
| Top 20 Holdings Weighted | +21.34% | +78.65% | +14.78% | +99.20% |
| Top 20 Holdings Unweighted | +17.10% | +60.57% | +10.30% | +63.24% |
Ack Asset Management LLC reports $856.33M in US-listed equity holdings across 21 positions in its most recent 13F filing. Its largest disclosed positions are WMS (7.2%), HLIO (7.1%) and LFUS (6.7%). The top 20 holdings account for 96.67% of reported assets. Its disclosed equity book has returned +78.65% on a three-year cumulative basis. Figures reflect the Q2 2026 filing.
Portfolio changes
Every reported change this quarter, grouped by direction. The signal is in the rotation, not any single trade.
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Holdings on this page are parsed from Ack Asset Management LLC’s Form 13F filings with the U.S. Securities and Exchange Commission (CIK 1510940). View Ack Asset Management LLC’s 13F filings on SEC