ACK Asset Management LLC
Top Portfolio Positions
19 positions ·
$774,338,521 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| MTRN |
MATERION Corp
Basic Materials
|
474,800 | $68,679,820 | 8.87% | |
| WMS |
Advanced Drainage Systems, Inc.
Industrials
|
390,000 | $53,480,700 | 6.91% | |
| ATS |
ATS Corp /ATS
Industrials
|
1,846,196 | $52,062,727 | 6.72% | |
| ROG |
Rogers Corp
Technology
|
475,000 | $50,981,750 | 6.58% | |
| HLIO |
Helios Technologies, Inc.
Industrials
|
780,378 | $50,498,260 | 6.52% | |
| LFUS |
Littelfuse Inc /De
Technology
|
135,000 | $45,812,250 | 5.92% | |
| CNM |
Core & Main, Inc.
Industrials
|
900,000 | $44,460,000 | 5.74% | |
| NOVT |
Novanta Inc
Technology
|
375,000 | $44,291,250 | 5.72% | |
| SITE |
SiteOne Landscape Supply, Inc.
Industrials
|
330,000 | $43,926,300 | 5.67% | |
| ASTE |
Astec Industries Inc
Industrials
|
786,500 | $42,345,160 | 5.47% |
Portfolio Trend
25 quarters · across all stocks
Holdings in SITE
Shares Held
Position Value (USD)
5 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $43,926,300 | 330,000 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $41,104,800 | 330,000 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $36,064,000 | 280,000 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $30,235,000 | 250,000 | Shares | Sole | 2025-08-13 | |
| 2025-03-31 | $12,144,000 | 100,000 | Shares | Sole | 2025-05-13 | |
| No 13F history on record for this holder in this stock. | ||||||