Ack Asset Management LLC 13F holdings, Q1 2026
Holdings as of March 31, 2026 · filings on SEC EDGAR · latest filing →
Ack Asset Management LLC disclosed 20 US equity positions worth $801.1m in its Q1 2026 13F filing. The largest position was MTRN at 8.6% of the reported book, followed by WMS and ATS.
What did Ack Asset Management LLC own in Q1 2026? Top 20 positions
| # | Stock | Sector | Weight | Value | Shares | Δ shares | vs prior |
|---|---|---|---|---|---|---|---|
| 1 | MTRN MTRN | Basic Materials | 8.6% | $68.7m | 474,800 | – | |
| 2 | WMS WMS | Industrials | 6.7% | $53.5m | 390,000 | – | |
| 3 | ATS ATS | Industrials | 6.5% | $52.1m | 1,846,196 | – | |
| 4 | ROG ROG | Technology | 6.4% | $51.0m | 475,000 | – | |
| 5 | HLIO HLIO | Industrials | 6.3% | $50.5m | 780,378 | – | |
| 6 | LFUS LFUS | Technology | 5.7% | $45.8m | 135,000 | – | |
| 7 | CNM CNM | Industrials | 5.5% | $44.5m | 900,000 | – | |
| 8 | NOVT NOVT | Technology | 5.5% | $44.3m | 375,000 | – | |
| 9 | SITE SITE | Industrials | 5.5% | $43.9m | 330,000 | – | |
| 10 | ASTE ASTE | Industrials | 5.3% | $42.3m | 786,500 | – | |
| 11 | JHX JHX | Basic Materials | 5.0% | $39.8m | 2,100,000 | – | |
| 12 | DXPE DXPE | Industrials | 4.5% | $36.3m | 260,000 | – | |
| 13 | CDNL CDNL | 4.3% | $34.7m | 874,000 | – | ||
| 14 | EXP EXP | Basic Materials | 3.9% | $31.3m | 165,000 | – | |
| 15 | MBC MBC | Consumer Cyclical | 3.8% | $30.7m | 3,700,000 | – | |
| 16 | GVA GVA | Industrials | 3.7% | $30.0m | 250,000 | – | |
| 17 | CTS CTS | Technology | 3.5% | $27.9m | 584,000 | – | |
| 18 | SWIM SWIM | Industrials | 3.5% | $27.7m | 5,160,000 | – | |
| 19 | AERO-SWX | 3.3% | $26.8m | 830,000 | – | ||
| 20 | CLFD CLFD | Technology | 2.4% | $19.5m | 735,200 | – |
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.