Filed: 5/13/2025ACC: 0001510940-25-000002
📋 What this filing means
ACK ASSET MANAGEMENT LLC filed this quarterly 13F‑HR report disclosing 20 equity positions with a total reported market value of $608.96M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
20
Positions
$608.96M
Total AUM (reported)
18.11M
Total Shares
Allocation by class
COM$608.96M100.0%
Portfolio Concentration
Top 3$169.49M27.8%
4–10$276.53M45.4%
11–25$162.93M26.8%
Top 3 weight
27.8%
Top 10 weight
73.2%
Voting Authority Distribution
Total shares with voting rights: 18.11M
Sole
Full voting authority
18.11M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole20
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings20
Rows:
DYCOM INDUSTRIES INC
SOLEShares382.80K
TypeSH
Market value$58.32M
9.58%
Sole
382.80K
Shared
0.00
None
0.00
ENERSYS
SOLEShares624.32K
TypeSH
Market value$57.18M
9.39%
Sole
624.32K
Shared
0.00
None
0.00
MASTEC INC
SOLEShares462.70K
TypeSH
Market value$54.00M
8.87%
Sole
462.70K
Shared
0.00
None
0.00
ATS CORP
SOLEShares2.01M
TypeSH
Market value$50.19M
8.24%
Sole
2.01M
Shared
0.00
None
0.00
ASTRONICS CORP
SOLEShares2.06M
TypeSH
Market value$49.79M
8.18%
Sole
2.06M
Shared
0.00
None
0.00
JBT MAREL CORPORATION
SOLEShares369.80K
TypeSH
Market value$45.19M
7.42%
Sole
369.80K
Shared
0.00
None
0.00
MATERION CORP
SOLEShares459.20K
TypeSH
Market value$37.47M
6.15%
Sole
459.20K
Shared
0.00
None
0.00
ROGERS CORP
SOLEShares517.50K
TypeSH
Market value$34.95M
5.74%
Sole
517.50K
Shared
0.00
None
0.00
MYR GROUP INC
SOLEShares279.10K
TypeSH
Market value$31.56M
5.18%
Sole
279.10K
Shared
0.00
None
0.00
CECO ENVIRONMENTAL CORP
SOLEShares1.20M
TypeSH
Market value$27.38M
4.50%
Sole
1.20M
Shared
0.00
None
0.00
MIRION TECHNOLOGIES INC
SOLEShares1.62M
TypeSH
Market value$23.47M
3.85%
Sole
1.62M
Shared
0.00
None
0.00
CLEARFIELD INC
SOLEShares687.20K
TypeSH
Market value$20.42M
3.35%
Sole
687.20K
Shared
0.00
None
0.00
CENTURI HOLDINGS INC.
SOLEShares1.22M
TypeSH
Market value$20.01M
3.29%
Sole
1.22M
Shared
0.00
None
0.00
MRC GLOBAL INC
SOLEShares1.56M
TypeSH
Market value$17.97M
2.95%
Sole
1.56M
Shared
0.00
None
0.00
MASTERBRAND INC
SOLEShares1.30M
TypeSH
Market value$17.01M
2.79%
Sole
1.30M
Shared
0.00
None
0.00
BIRD CONSTRUCTION INC
SOLEShares1.12M
TypeSH
Market value$16.96M
2.79%
Sole
1.12M
Shared
0.00
None
0.00
MATRIX SERVICE CO
SOLEShares1.18M
TypeSH
Market value$14.72M
2.42%
Sole
1.18M
Shared
0.00
None
0.00
GRANITE CONSTRUCTION INC
SOLEShares190.70K
TypeSH
Market value$14.38M
2.36%
Sole
190.70K
Shared
0.00
None
0.00
SITEONE LANDSCAPE SUPPLY INC
SOLEShares100K
TypeSH
Market value$12.14M
1.99%
Sole
100K
Shared
0.00
None
0.00
NLIGHT INC
SOLEShares754K
TypeSH
Market value$5.86M
0.96%
Sole
754K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
DYCOM INDUSTRIES INCSOLE | COM | 382.80K | SH | $58.32M 9.58% | 382.80K | 0.00 | 0.00 |
ENERSYSSOLE | COM | 624.32K | SH | $57.18M 9.39% | 624.32K | 0.00 | 0.00 |
MASTEC INCSOLE | COM | 462.70K | SH | $54.00M 8.87% | 462.70K | 0.00 | 0.00 |
ATS CORPSOLE | COM | 2.01M | SH | $50.19M 8.24% | 2.01M | 0.00 | 0.00 |
ASTRONICS CORPSOLE | COM | 2.06M | SH | $49.79M 8.18% | 2.06M | 0.00 | 0.00 |
JBT MAREL CORPORATIONSOLE | COM | 369.80K | SH | $45.19M 7.42% | 369.80K | 0.00 | 0.00 |
MATERION CORPSOLE | COM | 459.20K | SH | $37.47M 6.15% | 459.20K | 0.00 | 0.00 |
ROGERS CORPSOLE | COM | 517.50K | SH | $34.95M 5.74% | 517.50K | 0.00 | 0.00 |
MYR GROUP INCSOLE | COM | 279.10K | SH | $31.56M 5.18% | 279.10K | 0.00 | 0.00 |
CECO ENVIRONMENTAL CORPSOLE | COM | 1.20M | SH | $27.38M 4.50% | 1.20M | 0.00 | 0.00 |
MIRION TECHNOLOGIES INCSOLE | COM | 1.62M | SH | $23.47M 3.85% | 1.62M | 0.00 | 0.00 |
CLEARFIELD INCSOLE | COM | 687.20K | SH | $20.42M 3.35% | 687.20K | 0.00 | 0.00 |
CENTURI HOLDINGS INC.SOLE | COM | 1.22M | SH | $20.01M 3.29% | 1.22M | 0.00 | 0.00 |
MRC GLOBAL INCSOLE | COM | 1.56M | SH | $17.97M 2.95% | 1.56M | 0.00 | 0.00 |
MASTERBRAND INCSOLE | COM | 1.30M | SH | $17.01M 2.79% | 1.30M | 0.00 | 0.00 |
BIRD CONSTRUCTION INCSOLE | COM | 1.12M | SH | $16.96M 2.79% | 1.12M | 0.00 | 0.00 |
MATRIX SERVICE COSOLE | COM | 1.18M | SH | $14.72M 2.42% | 1.18M | 0.00 | 0.00 |
GRANITE CONSTRUCTION INCSOLE | COM | 190.70K | SH | $14.38M 2.36% | 190.70K | 0.00 | 0.00 |
SITEONE LANDSCAPE SUPPLY INCSOLE | COM | 100K | SH | $12.14M 1.99% | 100K | 0.00 | 0.00 |
NLIGHT INCSOLE | COM | 754K | SH | $5.86M 0.96% | 754K | 0.00 | 0.00 |