ACK Asset Management LLC
Clone Performance
Sep 2023–Sep 2026 · vs SPYHypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.
Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. Returns use comparable raw closes and exclude dividends. Returns are unavailable when a held security or benchmark crosses a captured split without a certified price basis; the requested window is not shortened to hide it. It tracks 100% of reported value on average across 13 quarters. Past performance does not predict future results.
Portfolio Concentration
20 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026Portfolio Trend
Sector Breakdown
As of Jun 30, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Industrials | 47.6% | $394,214,195 |
| Technology | 18.9% | $156,768,783 |
| Basic Materials | 17.5% | $144,625,650 |
| Consumer Cyclical | 16.0% | $132,258,000 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increasedTrimmed
Positions the filer reduced| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| ATS | ATS Corp /ATS | −346,196 | 1,500,000 | $43,170,000 | |
| MTRN | MATERION Corp | −339,800 | 135,000 | $40,147,650 | |
| HLIO | Helios Technologies, Inc. | −99,378 | 681,000 | $60,779,250 | |
| ASTE | Astec Industries Inc | −96,224 | 690,276 | $42,237,988 | |
| LFUS | Littelfuse Inc /De | −10,000 | 125,000 | $56,916,250 | |
| No positions match the current search. | |||||
New Positions
Positions the filer opened this quarter| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| GTX | Garrett Motion Inc. | 1,500,000 | $54,345,000 | |
| BWA | Borgwarner Inc | 600,000 | $39,840,000 | |
| DNOW | DNOW Inc. | 3,000,000 | $38,910,000 | |
| ST | Sensata Technologies Holding plc | 600,000 | $28,644,000 | |
| SHLS | Shoals Technologies Group, Inc. | 2,255,000 | $22,324,500 | |
| EQPT | EquipmentShare.com Inc | 1,064,830 | $20,934,557 | |
| MEI | Methode Electronics Inc | 877,500 | $16,646,175 | |
| No positions match the current search. | ||||
Sold Out
Positions the filer fully exited| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| ROG | Rogers Corp | 475,000 | $50,981,750 | |
| NOVT | Novanta Inc | 375,000 | $44,291,250 | |
| DXPE | Dxp Enterprises Inc | 260,000 | $36,329,800 | |
| CDNL | Cardinal Infrastructure Group Inc. | 874,000 | $34,658,470 | |
| GVA | Granite Construction Inc | 250,000 | $29,970,000 | |
| CTS | Cts Corp | 584,000 | $27,891,840 | |
| No positions match the current search. | ||||
| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| WMS |
Advanced Drainage Systems, Inc.
Industrials
|
Held | 390,000 | $61,214,400 | 7.39% | |
| HLIO |
Helios Technologies, Inc.
Industrials
|
Reduced | 681,000 | $60,779,250 | 7.34% | |
| LFUS |
Littelfuse Inc /De
Technology
|
Reduced | 125,000 | $56,916,250 | 6.88% | |
| JHX |
James Hardie Industries plc
Basic Materials
|
Held | 2,100,000 | $54,978,000 | 6.64% | |
| GTX |
Garrett Motion Inc.
Consumer Cyclical
|
NEW | 1,500,000 | $54,345,000 | 6.56% | |
| CNM |
Core & Main, Inc.
Industrials
|
Added | 1,090,000 | $52,592,500 | 6.35% | |
| EXP |
Eagle Materials Inc
Basic Materials
|
Added | 220,000 | $49,500,000 | 5.98% | |
| ATS |
ATS Corp /ATS
Industrials
|
Reduced | 1,500,000 | $43,170,000 | 5.21% | |
| ASTE |
Astec Industries Inc
Industrials
|
Reduced | 690,276 | $42,237,988 | 5.10% | |
| MTRN |
MATERION Corp
Basic Materials
|
Reduced | 135,000 | $40,147,650 | 4.85% | |
| BWA |
Borgwarner Inc
Consumer Cyclical
|
NEW | 600,000 | $39,840,000 | 4.81% | |
| DNOW |
DNOW Inc.
Industrials
|
NEW | 3,000,000 | $38,910,000 | 4.70% | |
| MBC |
MasterBrand, Inc.
Consumer Cyclical
|
Held | 3,700,000 | $38,073,000 | 4.60% | |
| SITE |
SiteOne Landscape Supply, Inc.
Industrials
|
Held | 330,000 | $37,755,300 | 4.56% | |
| SWIM |
Latham Group, Inc.
Industrials
|
Added | 5,660,000 | $36,620,200 | 4.42% | |
| CLFD |
Clearfield, Inc.
Technology
|
Added | 810,200 | $32,237,858 | 3.89% | |
| ST |
Sensata Technologies Holding plc
Technology
|
NEW | 600,000 | $28,644,000 | 3.46% | |
| SHLS |
Shoals Technologies Group, Inc.
Technology
|
NEW | 2,255,000 | $22,324,500 | 2.70% | |
| EQPT |
EquipmentShare.com Inc
Industrials
|
NEW | 1,064,830 | $20,934,557 | 2.53% | |
| MEI |
Methode Electronics Inc
Technology
|
NEW | 877,500 | $16,646,175 | 2.01% |
Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.