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Portfolio (Quarterly) Guide ↗

ACK Asset Management LLC

· CIK 0001510940
13F Portfolio $801.1B AUM 20 positions Filed May 15, 2026 EDGAR ↗ ← All Funds
Q1 2026 Q4 2025 · All 3 New 6 Added 1 Reduced 6 Exited
# Ticker Company Sector Shares Value ↓ % Port Chg Shares Chg % Period Price ① Since Period ①
1 MTRN MTRN Basic Materials 474,800.0 $68.7M 8.57% $144.65 +45.9%
2 WMS WMS Industrials 390,000.0 $53.5M 6.68% $137.13 +2.2%
3 ATS 1,846,196.0 $52.1M 6.50% $28.20
4 ROG ROG Technology 475,000.0 $51.0M 6.36% +38K +8.8% $107.33 +33.1%
5 HLIO HLIO Industrials 780,378.0 $50.5M 6.30% $64.71 +20.8%
6 LFUS LFUS Technology 135,000.0 $45.8M 5.72% NEW $339.35 +35.6%
7 CNM CNM Industrials 900,000.0 $44.5M 5.55% $49.40 -2.8%
8 NOVT NOVT Technology 375,000.0 $44.3M 5.53% $118.11 +31.8%
9 SITE SITE Industrials 330,000.0 $43.9M 5.48% $133.11 -8.6%
10 ASTE ASTE Industrials 786,500.0 $42.3M 5.29% $53.84 -12.6%
11 JHX 2,100,000.0 $39.8M 4.96% $18.94
12 DXPE DXPE Industrials 260,000.0 $36.3M 4.54% +20K +8.3% $139.73 +9.2%
13 CDNL CDNL Industrials 874,000.0 $34.7M 4.33% +29K +3.5% $39.66 +31.5%
14 EXP EXP Basic Materials 165,000.0 $31.3M 3.90% $189.45 +6.7%
15 MBC MBC Consumer Cyclical 3,700,000.0 $30.7M 3.84% +1.4M +60.9% $8.31 -13.8%
16 GVA GVA Industrials 250,000.0 $30.0M 3.74% -250K -50.0% $119.88 +17.6%
17 CTS CTS Technology 584,000.0 $27.9M 3.48% NEW $47.76 +28.3%
18 SWIM SWIM Industrials 5,160,000.0 $27.7M 3.46% NEW $5.37 -8.6%
19 AERO-SWX 830,000.0 $26.8M 3.35% +675K +436.0% $32.30
20 CLFD CLFD Technology 735,200.0 $19.5M 2.43% +110K +17.6% $26.47 +64.3%

Period Price is the implied market price on the last day of the reporting period, calculated as reported value ÷ shares held. It is not the fund's purchase price or cost basis — the fund may have initiated or added to the position at any point during the quarter at a different price. Since Period shows the price change from that quarter-end snapshot to today's last price — it reflects stock movement after the report date, not the fund's actual return.

Sector Allocation
Industrials 53.2%
Technology 27.6%
Basic Materials 14.6%
Consumer Cyclical 4.5%