ACK Asset Management
GREENWICH, CTfiles as ACK Asset Management LLC
$856m in 21 US stocks at the end of 30 June 2026. The top 10 are 60.2% of the money. It changed about 34.8% of the portfolio this quarter.
Value
$856m
Stocks
21
Top 10 share
60.2%
Turnover
34.8%
What changed this quarter
New
Bought for the first time this quarter.
- Garrett MotionGTX6.3% of the fund
- BorgwarnerBWA4.7% of the fund
- DnowDNOW4.5% of the fund
- Sensata Technologies HoldingST3.3% of the fund
- Shoals Technologies GroupSHLS2.6% of the fund
- EquipmentShare.comEQPT2.4% of the fund
- Methode ElectronicsMEI1.9% of the fund
Added
Bought more of a stock they already held.
- Core & MainCNM6.1% of the fund+21%
- Eagle MaterialsEXP5.8% of the fund+33%
- Latham GroupSWIM4.3% of the fund+10%
- ClearfieldCLFD3.8% of the fund+10%
- Aero-SwxMTASF3.3% of the fund+30%
Cut
Sold some of their stake.
- Helios TechnologiesHLIO7.1% of the fund-13%
- LittelfuseLFUS6.6% of the fund-7%
- ATS Corp /ATSATS5.0% of the fund-19%
- Astec IndustriesASTE4.9% of the fund-12%
- MaterionMTRN4.7% of the fund-72%
Sold out
Sold their entire stake.
- RogersROG-100%
- NovantaNOVT-100%
- DXP EnterprisesDXPE-100%
- Cardinal Infrastructure GroupCDNL-100%
- Granite ConstructionGVA-100%
- CTSCTS-100%
Holdings
- ATS Corp /ATSATS
- Share
- 5.0%
- Value
- $43m
- Shares
- 1,500,000
-19%
- Aero-SwxMTASF
- Share
- 3.3%
- Value
- $28m
- Shares
- 1,082,500
+30%
| Company | Share of fund | Value | Shares | Change |
|---|---|---|---|---|
| Advanced Drainage SystemsWMS | 7.1% | $61m | 390,000 | Held |
| Helios TechnologiesHLIO | 7.1% | $61m | 681,000 | -13% |
| LittelfuseLFUS | 6.6% | $57m | 125,000 | -7% |
| James Hardie IndustriesJHX | 6.4% | $55m | 2,100,000 | Held |
| Garrett MotionGTX | 6.3% | $54m | 1,500,000 | New |
| Core & MainCNM | 6.1% | $53m | 1,090,000 | +21% |
| Eagle MaterialsEXP | 5.8% | $50m | 220,000 | +33% |
| ATS Corp /ATSATS | 5.0% | $43m | 1,500,000 | -19% |
| Astec IndustriesASTE | 4.9% | $42m | 690,276 | -12% |
| MaterionMTRN | 4.7% | $40m | 135,000 | -72% |
| BorgwarnerBWA | 4.7% | $40m | 600,000 | New |
| DnowDNOW | 4.5% | $39m | 3,000,000 | New |
| MasterBrandMBC | 4.4% | $38m | 3,700,000 | Held |
| SiteOne Landscape SupplySITE | 4.4% | $38m | 330,000 | Held |
| Latham GroupSWIM | 4.3% | $37m | 5,660,000 | +10% |
| ClearfieldCLFD | 3.8% | $32m | 810,200 | +10% |
| Sensata Technologies HoldingST | 3.3% | $29m | 600,000 | New |
| Aero-SwxMTASF | 3.3% | $28m | 1,082,500 | +30% |
| Shoals Technologies GroupSHLS | 2.6% | $22m | 2,255,000 | New |
| EquipmentShare.comEQPT | 2.4% | $21m | 1,064,830 | New |
| Methode ElectronicsMEI | 1.9% | $17m | 877,500 | New |
Over time and by industry
Value over time
Jun '25
Dec '25
Jun '26
Value is up 12.5% since 30 June 2025.
Where the money is
Industrials47.3%
Technology17.4%
Materials16.5%
Retail & consumer15.4%
Other3.3%
From the fund's 13F filings. They list US stocks and options only, 45 days after each quarter, and leave out cash, bonds, shorts and foreign shares.