Filed: 11/14/2025ACC: 0001510940-25-000006
📋 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 $799.13M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
20
Positions
$799.13M
Total AUM (reported)
19.58M
Total Shares
Allocation by class
COM$799.13M100.0%
Portfolio Concentration
Top 3$189.17M23.7%
4–10$337.09M42.2%
11–25$272.87M34.1%
Top 3 weight
23.7%
Top 10 weight
65.9%
Voting Authority Distribution
Total shares with voting rights: 19.58M
Sole
Full voting authority
19.58M
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:
ENS
SOLEShares584.32K
TypeSH
Market value$66.01M
8.26%
Sole
584.32K
Shared
0.00
None
0.00
MTRN
SOLEShares524.80K
TypeSH
Market value$63.40M
7.93%
Sole
524.80K
Shared
0.00
None
0.00
GVA
SOLEShares545K
TypeSH
Market value$59.76M
7.48%
Sole
545K
Shared
0.00
None
0.00
ATRO
SOLEShares1.23M
TypeSH
Market value$56.10M
7.02%
Sole
1.23M
Shared
0.00
None
0.00
WMS
SOLEShares390K
TypeSH
Market value$54.09M
6.77%
Sole
390K
Shared
0.00
None
0.00
JBTM
SOLEShares350.55K
TypeSH
Market value$49.23M
6.16%
Sole
350.55K
Shared
0.00
None
0.00
CNM
SOLEShares900K
TypeSH
Market value$48.45M
6.06%
Sole
900K
Shared
0.00
None
0.00
ATS
SOLEShares1.85M
TypeSH
Market value$48.37M
6.05%
Sole
1.85M
Shared
0.00
None
0.00
AIN
SOLEShares760K
TypeSH
Market value$40.51M
5.07%
Sole
760K
Shared
0.00
None
0.00
JHX
SOLEShares2.10M
TypeSH
Market value$40.34M
5.05%
Sole
2.10M
Shared
0.00
None
0.00
HLIO
SOLEShares770K
TypeSH
Market value$40.14M
5.02%
Sole
770K
Shared
0.00
None
0.00
SITE
SOLEShares280K
TypeSH
Market value$36.06M
4.51%
Sole
280K
Shared
0.00
None
0.00
ASTE
SOLEShares701.50K
TypeSH
Market value$33.76M
4.22%
Sole
701.50K
Shared
0.00
None
0.00
APOG
SOLEShares708K
TypeSH
Market value$30.85M
3.86%
Sole
708K
Shared
0.00
None
0.00
MBC
SOLEShares2.30M
TypeSH
Market value$30.29M
3.79%
Sole
2.30M
Shared
0.00
None
0.00
CTRI
SOLEShares1.38M
TypeSH
Market value$29.11M
3.64%
Sole
1.38M
Shared
0.00
None
0.00
CLFD
SOLEShares625.20K
TypeSH
Market value$21.49M
2.69%
Sole
625.20K
Shared
0.00
None
0.00
EXP
SOLEShares90K
TypeSH
Market value$20.97M
2.62%
Sole
90K
Shared
0.00
None
0.00
NPKI
SOLEShares1.58M
TypeSH
Market value$17.83M
2.23%
Sole
1.58M
Shared
0.00
None
0.00
CTOS
SOLEShares1.93M
TypeSH
Market value$12.36M
1.55%
Sole
1.93M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
ENSSOLE | COM | 584.32K | SH | $66.01M 8.26% | 584.32K | 0.00 | 0.00 |
MTRNSOLE | COM | 524.80K | SH | $63.40M 7.93% | 524.80K | 0.00 | 0.00 |
GVASOLE | COM | 545K | SH | $59.76M 7.48% | 545K | 0.00 | 0.00 |
ATROSOLE | COM | 1.23M | SH | $56.10M 7.02% | 1.23M | 0.00 | 0.00 |
WMSSOLE | COM | 390K | SH | $54.09M 6.77% | 390K | 0.00 | 0.00 |
JBTMSOLE | COM | 350.55K | SH | $49.23M 6.16% | 350.55K | 0.00 | 0.00 |
CNMSOLE | COM | 900K | SH | $48.45M 6.06% | 900K | 0.00 | 0.00 |
ATSSOLE | COM | 1.85M | SH | $48.37M 6.05% | 1.85M | 0.00 | 0.00 |
AINSOLE | COM | 760K | SH | $40.51M 5.07% | 760K | 0.00 | 0.00 |
JHXSOLE | COM | 2.10M | SH | $40.34M 5.05% | 2.10M | 0.00 | 0.00 |
HLIOSOLE | COM | 770K | SH | $40.14M 5.02% | 770K | 0.00 | 0.00 |
SITESOLE | COM | 280K | SH | $36.06M 4.51% | 280K | 0.00 | 0.00 |
ASTESOLE | COM | 701.50K | SH | $33.76M 4.22% | 701.50K | 0.00 | 0.00 |
APOGSOLE | COM | 708K | SH | $30.85M 3.86% | 708K | 0.00 | 0.00 |
MBCSOLE | COM | 2.30M | SH | $30.29M 3.79% | 2.30M | 0.00 | 0.00 |
CTRISOLE | COM | 1.38M | SH | $29.11M 3.64% | 1.38M | 0.00 | 0.00 |
CLFDSOLE | COM | 625.20K | SH | $21.49M 2.69% | 625.20K | 0.00 | 0.00 |
EXPSOLE | COM | 90K | SH | $20.97M 2.62% | 90K | 0.00 | 0.00 |
NPKISOLE | COM | 1.58M | SH | $17.83M 2.23% | 1.58M | 0.00 | 0.00 |
CTOSSOLE | COM | 1.93M | SH | $12.36M 1.55% | 1.93M | 0.00 | 0.00 |