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CIK: 0001510940
Total reported value
$856.3M
$856.3M
20 檔
32.2%
According to the latest 13F quarterly dataset, ACK Asset Management LLC managed an equity portfolio of $856.3M at the end of Q1 2026, spanning 20 distinct U.S. exchange-listed positions.
ACK Asset Management LLC executed strategic sector rebalancing during Q1 2026, establishing 3 new positions while fully exiting 6 holdings and trimming 1 positions.
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | MTRN | Materion CORP | Stock-Other | 8.57% | -3.88% | — | |
| 2 | WMS | Advanced Drainage Systems In | Stock-Industrials | 6.68% | +0.47% | — | |
| 3 | ATS | Ats CORP | Stock-Other | 6.50% | -1.46% | — | |
| 4 | ROG | Rogers CORP | Stock-Other | 6.36% | -6.36% | EXIT | |
| 5 | HLIO | Helios Technologies Inc | Stock-Other | 6.30% | +0.80% | — | |
| 6 | LFUS | Littelfuse Inc | Stock-Tech | 5.72% | +0.93% | — | |
| 7 | CNM | Core & Main Inc-class A | Stock-Industrials | 5.55% | +0.59% | — | |
| 8 | NOVT | Novanta Inc | Stock-Other | 5.53% | -5.53% | EXIT | |
| 9 | SITE | Siteone Landscape Supply Inc | Stock-Industrials | 5.48% | -1.07% | — | |
| 10 | ASTE | Astec Industries Inc | Stock-Other | 5.29% | -0.36% | — | |
| 11 | JHX | James Hardie Industries plc | Stock-Other | 4.96% | +1.46% | — | |
| 12 | DXPE | Dxp Enterprises Inc | Stock-Other | 4.53% | -4.53% | EXIT | |
| 13 | CDNL | Cardinal Infrastructure Gr-a | Stock-Other | 4.33% | -4.33% | EXIT | |
| 14 | EXP | Eagle Materials Inc | Stock-Materials | 3.90% | +1.88% | — | |
| 15 | MBC | Masterbrand Inc | Stock-Consumer Disc | 3.84% | +0.61% | +60.87% | |
| 16 | GVA | Granite Construction Inc | Stock-Industrials | 3.74% | -3.74% | EXIT | |
| 17 | CTS | Cts CORP | Stock-Other | 3.48% | -3.48% | EXIT | |
| 18 | SWIM | Latham Group Inc | Stock-Other | 3.46% | +0.82% | — | |
| 19 | ✓ | Stock-Other | 3.35% | -0.03% | +436.00% | ||
| 20 | CLFD | Clearfield Inc | Stock-Other | 2.43% | +1.33% | +17.59% |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | ✓ | +2.7% | +436.00% | Add | |
| 2 | CDNL | Cardinal Infrastructure Gr-a | +1.8% | +3.48% | Add |
| 3 | ROG | Rogers CORP | +1.3% | +8.77% | Add |
| 4 | DXPE | Dxp Enterprises Inc | +1.2% | +8.33% | Add |
| 5 | MTRN | Materion CORP | +1.2% | — | Unchanged |
| 6 | HLIO | Helios Technologies Inc | +1.1% | — | Unchanged |
| 7 | ASTE | Astec Industries Inc | +1% | — | Unchanged |
| 8 | MBC | Masterbrand Inc | +0.7% | +60.87% | Add |
| 9 | SITE | Siteone Landscape Supply Inc | +0.3% | — | Unchanged |
| 10 | CLFD | Clearfield Inc | +0.1% | +17.59% | Add |
| 11 | ATS | Ats CORP | +0.1% | — | Unchanged |
| 12 | NOVT | Novanta Inc | -0.1% | — | Unchanged |
| 13 | CNM | Core & Main Inc-class A | -0.3% | — | Unchanged |
| 14 | EXP | Eagle Materials Inc | -0.4% | — | Unchanged |
| 15 | WMS | Advanced Drainage Systems In | -0.4% | — | Unchanged |
| 16 | JHX | James Hardie Industries plc | -0.5% | — | Unchanged |
| 17 | GVA | Granite Construction Inc | -3.5% | -50.00% | Trim |
| 18 | LFUS | Littelfuse Inc | — | NEW | New buy |
| 19 | ENS | Enersys | — | EXIT | Sold out |
| 20 | ATRO | Astronics CORP | — | EXIT | Sold out |
| 21 | AIN | Albany Intl Corp-cl A | — | EXIT | Sold out |
| 22 | APOG | Apogee Enterprises Inc | — | EXIT | Sold out |
| 23 | CTS | Cts CORP | — | NEW | New buy |
| 24 | SWIM | Latham Group Inc | — | NEW | New buy |
| 25 | ERII | Energy Recovery Inc | — | EXIT | Sold out |
| 26 | CTOS | Custom Truck One Source Inc | — | EXIT | Sold out |
According to official SEC Form 13F filings, ACK Asset Management LLC reported a total U.S. public equity portfolio value of $856.3M across 20 disclosed positions in Q1 2026.
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In terms of portfolio concentration, the top 5 core holdings (including MTRN, WMS, ATS) accounted for 32.2% of total reported equity market value during Q1 2026.
Top New Position Initiated
LFUS
市值: $45.8M
Top Position Liquidated / Trimmed
ENS
前期市值: $44.7M
During Q1 2026, ACK Asset Management LLC's top holdings by market value included MTRN (8.6%)、WMS (6.7%)、ATS (6.5%). The largest single position, MTRN, represented 8.6% of total portfolio value.
In Q1 2026, ACK Asset Management LLC made 16 total portfolio adjustments, initiating 3 new buys, adding to 6 positions, trimming 1 holdings, and fully liquidating 6 stocks.
All holding records on this page are fetched directly from the U.S. Securities and Exchange Commission (SEC) EDGAR system (Form 13F-HR). AlphaSMO parses CUSIP identifiers and formats data into Schema.org-compliant datasets.
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