Filed: 8/13/2025ACC: 0001510940-25-000005
📋 What this filing means
ACK ASSET MANAGEMENT LLC filed this quarterly 13F‑HR report disclosing 21 equity positions with a total reported market value of $761.43M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
21
Positions
$761.43M
Total AUM (reported)
18.51M
Total Shares
Allocation by class
COM$761.43M100.0%
Portfolio Concentration
Top 3$182.74M24.0%
4–10$319.64M42.0%
11–25$259.05M34.0%
Top 3 weight
24.0%
Top 10 weight
66.0%
Voting Authority Distribution
Total shares with voting rights: 18.51M
Sole
Full voting authority
18.51M
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)
Sole21
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings21
Rows:
ATRO
SOLEShares2.06M
TypeSH
Market value$68.97M
9.06%
Sole
2.06M
Shared
0.00
None
0.00
ATS
SOLEShares1.85M
TypeSH
Market value$58.86M
7.73%
Sole
1.85M
Shared
0.00
None
0.00
DY
SOLEShares224.70K
TypeSH
Market value$54.91M
7.21%
Sole
224.70K
Shared
0.00
None
0.00
GVA
SOLEShares545K
TypeSH
Market value$50.96M
6.69%
Sole
545K
Shared
0.00
None
0.00
ENS
SOLEShares584.32K
TypeSH
Market value$50.12M
6.58%
Sole
584.32K
Shared
0.00
None
0.00
MYRG
SOLEShares265.20K
TypeSH
Market value$48.12M
6.32%
Sole
265.20K
Shared
0.00
None
0.00
CTRI
SOLEShares2.03M
TypeSH
Market value$45.60M
5.99%
Sole
2.03M
Shared
0.00
None
0.00
JBTM
SOLEShares350.55K
TypeSH
Market value$42.16M
5.54%
Sole
350.55K
Shared
0.00
None
0.00
MTRN
SOLEShares524.80K
TypeSH
Market value$41.65M
5.47%
Sole
524.80K
Shared
0.00
None
0.00
AIN
SOLEShares585K
TypeSH
Market value$41.03M
5.39%
Sole
585K
Shared
0.00
None
0.00
RRX
SOLEShares275K
TypeSH
Market value$39.86M
5.24%
Sole
275K
Shared
0.00
None
0.00
WMS
SOLEShares345K
TypeSH
Market value$39.63M
5.20%
Sole
345K
Shared
0.00
None
0.00
MRC
SOLEShares2.27M
TypeSH
Market value$31.08M
4.08%
Sole
2.27M
Shared
0.00
None
0.00
SITE
SOLEShares250K
TypeSH
Market value$30.23M
3.97%
Sole
250K
Shared
0.00
None
0.00
MIR
SOLEShares1.34M
TypeSH
Market value$28.79M
3.78%
Sole
1.34M
Shared
0.00
None
0.00
CLFD
SOLEShares625.20K
TypeSH
Market value$27.14M
3.56%
Sole
625.20K
Shared
0.00
None
0.00
MTZ
SOLEShares125K
TypeSH
Market value$21.30M
2.80%
Sole
125K
Shared
0.00
None
0.00
MTRX
SOLEShares1.09M
TypeSH
Market value$14.69M
1.93%
Sole
1.09M
Shared
0.00
None
0.00
NPKI
SOLEShares1.23M
TypeSH
Market value$10.44M
1.37%
Sole
1.23M
Shared
0.00
None
0.00
CTOS
SOLEShares1.88M
TypeSH
Market value$9.26M
1.22%
Sole
1.88M
Shared
0.00
None
0.00
DXPE
SOLEShares75.60K
TypeSH
Market value$6.63M
0.87%
Sole
75.60K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
ATROSOLE | COM | 2.06M | SH | $68.97M 9.06% | 2.06M | 0.00 | 0.00 |
ATSSOLE | COM | 1.85M | SH | $58.86M 7.73% | 1.85M | 0.00 | 0.00 |
DYSOLE | COM | 224.70K | SH | $54.91M 7.21% | 224.70K | 0.00 | 0.00 |
GVASOLE | COM | 545K | SH | $50.96M 6.69% | 545K | 0.00 | 0.00 |
ENSSOLE | COM | 584.32K | SH | $50.12M 6.58% | 584.32K | 0.00 | 0.00 |
MYRGSOLE | COM | 265.20K | SH | $48.12M 6.32% | 265.20K | 0.00 | 0.00 |
CTRISOLE | COM | 2.03M | SH | $45.60M 5.99% | 2.03M | 0.00 | 0.00 |
JBTMSOLE | COM | 350.55K | SH | $42.16M 5.54% | 350.55K | 0.00 | 0.00 |
MTRNSOLE | COM | 524.80K | SH | $41.65M 5.47% | 524.80K | 0.00 | 0.00 |
AINSOLE | COM | 585K | SH | $41.03M 5.39% | 585K | 0.00 | 0.00 |
RRXSOLE | COM | 275K | SH | $39.86M 5.24% | 275K | 0.00 | 0.00 |
WMSSOLE | COM | 345K | SH | $39.63M 5.20% | 345K | 0.00 | 0.00 |
MRCSOLE | COM | 2.27M | SH | $31.08M 4.08% | 2.27M | 0.00 | 0.00 |
SITESOLE | COM | 250K | SH | $30.23M 3.97% | 250K | 0.00 | 0.00 |
MIRSOLE | COM | 1.34M | SH | $28.79M 3.78% | 1.34M | 0.00 | 0.00 |
CLFDSOLE | COM | 625.20K | SH | $27.14M 3.56% | 625.20K | 0.00 | 0.00 |
MTZSOLE | COM | 125K | SH | $21.30M 2.80% | 125K | 0.00 | 0.00 |
MTRXSOLE | COM | 1.09M | SH | $14.69M 1.93% | 1.09M | 0.00 | 0.00 |
NPKISOLE | COM | 1.23M | SH | $10.44M 1.37% | 1.23M | 0.00 | 0.00 |
CTOSSOLE | COM | 1.88M | SH | $9.26M 1.22% | 1.88M | 0.00 | 0.00 |
DXPESOLE | COM | 75.60K | SH | $6.63M 0.87% | 75.60K | 0.00 | 0.00 |