Ack Asset Management LLC 13F holdings, Q2 2026
Holdings as of June 30, 2026 · filings on SEC EDGAR · this is the latest filing on record
Ack Asset Management LLC disclosed 21 US equity positions worth $856.3m in its Q2 2026 13F filing. The largest position was WMS at 7.1% of the reported book, followed by HLIO and LFUS. Against the Q1 2026 filing, it opened 7 new positions, added to 5 and reduced 5 among the top 21 holdings.
What did Ack Asset Management LLC own in Q2 2026? Top 21 positions
| # | Stock | Sector | Weight | Value | Shares | Δ shares | vs Q1 2026 |
|---|---|---|---|---|---|---|---|
| 1 | WMS WMS | Industrials | 7.1% | $61.2m | 390,000 | 0% | held |
| 2 | HLIO HLIO | Industrials | 7.1% | $60.8m | 681,000 | -13% | reduced |
| 3 | LFUS LFUS | Technology | 6.6% | $56.9m | 125,000 | -7% | reduced |
| 4 | JHX JHX | Basic Materials | 6.4% | $55.0m | 2,100,000 | 0% | held |
| 5 | GTX GTX | Consumer Cyclical | 6.3% | $54.3m | 1,500,000 | – | new |
| 6 | CNM CNM | Industrials | 6.1% | $52.6m | 1,090,000 | 21% | added |
| 7 | EXP EXP | Basic Materials | 5.8% | $49.5m | 220,000 | 33% | added |
| 8 | ATS ATS | Industrials | 5.0% | $43.2m | 1,500,000 | -19% | reduced |
| 9 | ASTE ASTE | Industrials | 4.9% | $42.2m | 690,276 | -12% | reduced |
| 10 | MTRN MTRN | Basic Materials | 4.7% | $40.1m | 135,000 | -72% | reduced |
| 11 | BWA BWA | Consumer Cyclical | 4.7% | $39.8m | 600,000 | – | new |
| 12 | DNOW DNOW | Industrials | 4.5% | $38.9m | 3,000,000 | – | new |
| 13 | MBC MBC | Consumer Cyclical | 4.4% | $38.1m | 3,700,000 | 0% | held |
| 14 | SITE SITE | Industrials | 4.4% | $37.8m | 330,000 | 0% | held |
| 15 | SWIM SWIM | Industrials | 4.3% | $36.6m | 5,660,000 | 10% | added |
| 16 | CLFD CLFD | Technology | 3.8% | $32.2m | 810,200 | 10% | added |
| 17 | ST | 3.3% | $28.6m | 600,000 | – | new | |
| 18 | AERO-SWX | 3.3% | $28.5m | 1,082,500 | 30% | added | |
| 19 | SHLS SHLS | Technology | 2.6% | $22.3m | 2,255,000 | – | new |
| 20 | EQPT EQPT | Industrials | 2.4% | $20.9m | 1,064,830 | – | new |
| 21 | MEI MEI | Technology | 1.9% | $16.6m | 877,500 | – | 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.